/**
* Function for initialization.
*/
GLUSboolean init(GLUSvoid)
{
GLubyte pixels[WIDTH * HEIGHT * BYTES_PER_PIXEL];
//
GLUStextfile vertexSource;
GLUStextfile fragmentSource;
// Render (CPU) into pixel buffer
if (!renderToPixelBuffer(pixels, WIDTH, HEIGHT))
{
printf("Error: Could not render to pixel buffer.\n");
return GLUS_FALSE;
}
// Load full screen rendering shaders
glusLoadTextFile("../Example29/shader/fullscreen.vert.glsl", &vertexSource);
glusLoadTextFile("../Example29/shader/texture.frag.glsl", &fragmentSource);
glusBuildProgramFromSource(&g_program, (const GLchar**)&vertexSource.text, 0, 0, 0, (const GLchar**)&fragmentSource.text);
glusDestroyTextFile(&vertexSource);
glusDestroyTextFile(&fragmentSource);
g_textureLocation = glGetUniformLocation(g_program.program, "u_texture");
// Generate texture
glGenTextures(1, &g_texture);
glBindTexture(GL_TEXTURE_2D, g_texture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, WIDTH, HEIGHT, 0, GL_RGB, GL_UNSIGNED_BYTE, pixels);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glBindTexture(GL_TEXTURE_2D, 0);
//
glUseProgram(g_program.program);
//
glGenVertexArrays(1, &g_vao);
glBindVertexArray(g_vao);
//
glBindTexture(GL_TEXTURE_2D, g_texture);
glUniform1i(g_textureLocation, 0);
return GLUS_TRUE;
}
GLUSboolean init(GLUSvoid)
{
// Points of a triangle in normalized device coordinates.
GLfloat points[] = { -0.5f, 0.0f, 0.0f, 1.0f, 0.5f, 0.0f, 0.0f, 1.0f, 0.0f, 0.5f, 0.0f, 1.0f };
GLUStextfile vertexSource;
GLUStextfile fragmentSource;
// Load the source of the vertex and fragment shader.
glusLoadTextFile("../Example02/shader/simple.vert.glsl", &vertexSource);
glusLoadTextFile("../Example02/shader/red.frag.glsl", &fragmentSource);
// Build the program.
glusBuildProgramFromSource(&g_program, (const GLchar**) &vertexSource.text, 0, 0, 0, (const GLchar**) &fragmentSource.text);
// Destroy the text resources.
glusDestroyTextFile(&vertexSource);
glusDestroyTextFile(&fragmentSource);
//
// Retrieve the vertex location in the program.
g_vertexLocation = glGetAttribLocation(g_program.program, "a_vertex");
//
// Create and bind the VBO for the vertices.
glGenBuffers(1, &g_verticesVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
// Transfer the vertices from CPU to GPU.
glBufferData(GL_ARRAY_BUFFER, 3 * 4 * sizeof(GLfloat), (GLfloat*) points, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
//
// Use the program.
glUseProgram(g_program.program);
// Create the VAO for the program.
glGenVertexArrays(1, &g_vao);
glBindVertexArray(g_vao);
// Bind the only used VBO in this example.
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
glVertexAttribPointer(g_vertexLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_vertexLocation);
//
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
return GLUS_TRUE;
}
GLUSboolean init(GLUSvoid)
{
GLUSshape plane;
GLUStextfile vertexSource;
GLUStextfile fragmentSource;
GLUStgaimage image;
GLfloat normalMatrix[9];
glusLoadTextFile("../Example07_ES/shader/normmap.vert.glsl", &vertexSource);
glusLoadTextFile("../Example07_ES/shader/normmap.frag.glsl", &fragmentSource);
glusBuildProgramFromSource(&g_program, (const GLUSchar**) &vertexSource.text, (const GLUSchar**) &fragmentSource.text);
glusDestroyTextFile(&vertexSource);
glusDestroyTextFile(&fragmentSource);
//
g_projectionMatrixLocation = glGetUniformLocation(g_program.program, "u_projectionMatrix");
g_modelViewMatrixLocation = glGetUniformLocation(g_program.program, "u_modelViewMatrix");
g_normalMatrixLocation = glGetUniformLocation(g_program.program, "u_normalMatrix");
g_lightDirectionLocation = glGetUniformLocation(g_program.program, "u_lightDirection");
// One texture for the color and one for the normals.
g_textureLocation = glGetUniformLocation(g_program.program, "u_texture");
g_normalMapLocation = glGetUniformLocation(g_program.program, "u_normalMap");
g_vertexLocation = glGetAttribLocation(g_program.program, "a_vertex");
// The tangent, bitangent and normal do define the tangent space. They are defined in object space, the inverse brings coordinates back to this tangent space.
g_tangentLocation = glGetAttribLocation(g_program.program, "a_tangent");
g_bitangentLocation = glGetAttribLocation(g_program.program, "a_bitangent");
g_normalLocation = glGetAttribLocation(g_program.program, "a_normal");
g_texCoordLocation = glGetAttribLocation(g_program.program, "a_texCoord");
//
glusLoadTgaImage("rock_color.tga", &image);
glGenTextures(1, &g_texture);
glBindTexture(GL_TEXTURE_2D, g_texture);
glTexImage2D(GL_TEXTURE_2D, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glBindTexture(GL_TEXTURE_2D, 0);
glusLoadTgaImage("rock_normal.tga", &image);
glGenTextures(1, &g_normalMap);
glBindTexture(GL_TEXTURE_2D, g_normalMap);
glTexImage2D(GL_TEXTURE_2D, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glBindTexture(GL_TEXTURE_2D, 0);
//
glusCreatePlanef(&plane, 1.5f);
g_numberIndicesPlane = plane.numberIndices;
glGenBuffers(1, &g_verticesVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
glBufferData(GL_ARRAY_BUFFER, plane.numberVertices * 4 * sizeof(GLfloat), (GLfloat*) plane.vertices, GL_STATIC_DRAW);
glGenBuffers(1, &g_tangentsVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_tangentsVBO);
glBufferData(GL_ARRAY_BUFFER, plane.numberVertices * 3 * sizeof(GLfloat), (GLfloat*) plane.tangents, GL_STATIC_DRAW);
glGenBuffers(1, &g_bitangentsVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_bitangentsVBO);
glBufferData(GL_ARRAY_BUFFER, plane.numberVertices * 3 * sizeof(GLfloat), (GLfloat*) plane.bitangents, GL_STATIC_DRAW);
glGenBuffers(1, &g_normalsVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_normalsVBO);
glBufferData(GL_ARRAY_BUFFER, plane.numberVertices * 3 * sizeof(GLfloat), (GLfloat*) plane.normals, GL_STATIC_DRAW);
glGenBuffers(1, &g_texCoordsVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_texCoordsVBO);
glBufferData(GL_ARRAY_BUFFER, plane.numberVertices * 2 * sizeof(GLfloat), (GLfloat*) plane.texCoords, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glGenBuffers(1, &g_indicesVBO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesVBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, g_numberIndicesPlane * sizeof(GLuint), (GLuint*) plane.indices, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glusDestroyShapef(&plane);
//
glUseProgram(g_program.program);
glGenVertexArrays(1, &g_vao);
glBindVertexArray(g_vao);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
glVertexAttribPointer(g_vertexLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_vertexLocation);
glBindBuffer(GL_ARRAY_BUFFER, g_tangentsVBO);
glVertexAttribPointer(g_tangentLocation, 3, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_tangentLocation);
glBindBuffer(GL_ARRAY_BUFFER, g_bitangentsVBO);
glVertexAttribPointer(g_bitangentLocation, 3, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_bitangentLocation);
glBindBuffer(GL_ARRAY_BUFFER, g_normalsVBO);
glVertexAttribPointer(g_normalLocation, 3, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_normalLocation);
glBindBuffer(GL_ARRAY_BUFFER, g_texCoordsVBO);
glVertexAttribPointer(g_texCoordLocation, 2, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_texCoordLocation);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesVBO);
//
glusLookAtf(g_viewMatrix, 0.0f, 0.0f, 5.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f);
glUniformMatrix4fv(g_modelViewMatrixLocation, 1, GL_FALSE, g_viewMatrix);
glusMatrix4x4ExtractMatrix3x3f(normalMatrix, g_viewMatrix);
glUniformMatrix3fv(g_normalMatrixLocation, 1, GL_FALSE, normalMatrix);
//
// Activate and bind first ...
glUniform1i(g_textureLocation, 0);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, g_texture);
// .. and second texture.
glUniform1i(g_normalMapLocation, 1);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, g_normalMap);
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
return GLUS_TRUE;
}
GLUSboolean init(GLUSvoid)
{
GLUSshape torus;
GLUSshape backgroundSphere;
GLUStgaimage image;
GLUStextfile vertexSource;
GLUStextfile fragmentSource;
glusLoadTextFile("../Example11_ES/shader/glass.vert.glsl", &vertexSource);
glusLoadTextFile("../Example11_ES/shader/glass.frag.glsl", &fragmentSource);
glusBuildProgramFromSource(&g_program, (const GLUSchar**) &vertexSource.text, (const GLUSchar**) &fragmentSource.text);
glusDestroyTextFile(&vertexSource);
glusDestroyTextFile(&fragmentSource);
//
glusLoadTextFile("../Example11_ES/shader/background.vert.glsl", &vertexSource);
glusLoadTextFile("../Example11_ES/shader/background.frag.glsl", &fragmentSource);
glusBuildProgramFromSource(&g_programBackground, (const GLUSchar**) &vertexSource.text, (const GLUSchar**) &fragmentSource.text);
glusDestroyTextFile(&vertexSource);
glusDestroyTextFile(&fragmentSource);
//
g_viewProjectionMatrixLocation = glGetUniformLocation(g_program.program, "u_viewProjectionMatrix");
g_modelMatrixLocation = glGetUniformLocation(g_program.program, "u_modelMatrix");
g_normalMatrixLocation = glGetUniformLocation(g_program.program, "u_normalMatrix");
g_cameraLocation = glGetUniformLocation(g_program.program, "u_camera");
g_cubemapLocation = glGetUniformLocation(g_program.program, "u_cubemap");
g_vertexLocation = glGetAttribLocation(g_program.program, "a_vertex");
g_normalLocation = glGetAttribLocation(g_program.program, "a_normal");
//
g_viewProjectionMatrixBackgroundLocation = glGetUniformLocation(g_programBackground.program, "u_viewProjectionMatrix");
g_modelMatrixBackgroundLocation = glGetUniformLocation(g_programBackground.program, "u_modelMatrix");
g_cubemapBackgroundLocation = glGetUniformLocation(g_programBackground.program, "u_cubemap");
g_vertexBackgroundLocation = glGetAttribLocation(g_programBackground.program, "a_vertex");
//
glGenTextures(1, &g_cubemap);
glBindTexture(GL_TEXTURE_CUBE_MAP, g_cubemap);
glusLoadTgaImage("cm_pos_x.tga", &image);
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
glusLoadTgaImage("cm_neg_x.tga", &image);
glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_X, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
glusLoadTgaImage("cm_pos_y.tga", &image);
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_Y, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
glusLoadTgaImage("cm_neg_y.tga", &image);
glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_Y, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
glusLoadTgaImage("cm_pos_z.tga", &image);
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_Z, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
glusLoadTgaImage("cm_neg_z.tga", &image);
glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_Z, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
//
glusCreateTorusf(&torus, 0.25f, 1.0f, 32, 32);
g_numberIndicesSphere = torus.numberIndices;
glGenBuffers(1, &g_verticesVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
glBufferData(GL_ARRAY_BUFFER, torus.numberVertices * 4 * sizeof(GLfloat), (GLfloat*) torus.vertices, GL_STATIC_DRAW);
glGenBuffers(1, &g_normalsVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_normalsVBO);
glBufferData(GL_ARRAY_BUFFER, torus.numberVertices * 3 * sizeof(GLfloat), (GLfloat*) torus.normals, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glGenBuffers(1, &g_indicesVBO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesVBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, torus.numberIndices * sizeof(GLuint), (GLuint*) torus.indices, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glusDestroyShapef(&torus);
//
glusCreateSpheref(&backgroundSphere, g_circleRadius, 32);
g_numberIndicesBackground = backgroundSphere.numberIndices;
glGenBuffers(1, &g_verticesBackgroundVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesBackgroundVBO);
glBufferData(GL_ARRAY_BUFFER, backgroundSphere.numberVertices * 4 * sizeof(GLfloat), (GLfloat*) backgroundSphere.vertices, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glGenBuffers(1, &g_indicesBackgroundVBO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesBackgroundVBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, backgroundSphere.numberIndices * sizeof(GLuint), (GLuint*) backgroundSphere.indices, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glusDestroyShapef(&backgroundSphere);
//
glUseProgram(g_program.program);
glUniform1i(g_cubemapLocation, 0);
glGenVertexArrays(1, &g_vao);
glBindVertexArray(g_vao);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
glVertexAttribPointer(g_vertexLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_vertexLocation);
glBindBuffer(GL_ARRAY_BUFFER, g_normalsVBO);
glVertexAttribPointer(g_normalLocation, 3, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_normalLocation);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesVBO);
//
glUseProgram(g_programBackground.program);
glUniform1i(g_cubemapBackgroundLocation, 0);
glGenVertexArrays(1, &g_vaoBackground);
glBindVertexArray(g_vaoBackground);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesBackgroundVBO);
glVertexAttribPointer(g_vertexBackgroundLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_vertexBackgroundLocation);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesBackgroundVBO);
//
glBindTexture(GL_TEXTURE_CUBE_MAP, g_cubemap);
//
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClearDepthf(1.0f);
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
return GLUS_TRUE;
}
GLUSboolean init(GLUSvoid)
{
GLUSshape shadowPlane;
GLUSshape plane;
GLUSshape torus, torusWithAdjacency;
GLUStextfile vertexSource;
GLUStextfile geometrySource;
GLUStextfile fragmentSource;
GLfloat viewMatrix[16];
GLfloat lightDirection[3];
lightDirection[0] = g_lightDirection[0];
lightDirection[1] = g_lightDirection[1];
lightDirection[2] = g_lightDirection[2];
glusVector3Normalizef(lightDirection);
//
glusLoadTextFile("../Example22/shader/color.vert.glsl", &vertexSource);
glusLoadTextFile("../Example22/shader/color.frag.glsl", &fragmentSource);
glusBuildProgramFromSource(&g_program, (const GLUSchar**) &vertexSource.text, 0, 0, 0, (const GLUSchar**) &fragmentSource.text);
glusDestroyTextFile(&vertexSource);
glusDestroyTextFile(&fragmentSource);
//
g_projectionMatrixLocation = glGetUniformLocation(g_program.program, "u_projectionMatrix");
g_viewMatrixLocation = glGetUniformLocation(g_program.program, "u_viewMatrix");
g_modelMatrixLocation = glGetUniformLocation(g_program.program, "u_modelMatrix");
g_normalMatrixLocation = glGetUniformLocation(g_program.program, "u_normalMatrix");
g_colorLocation = glGetUniformLocation(g_program.program, "u_shapeColor");
g_lightDirectionLocation = glGetUniformLocation(g_program.program, "u_lightDirection");
g_vertexLocation = glGetAttribLocation(g_program.program, "a_vertex");
g_normalLocation = glGetAttribLocation(g_program.program, "a_normal");
//
glusLoadTextFile("../Example22/shader/shadowvolume.vert.glsl", &vertexSource);
glusLoadTextFile("../Example22/shader/shadowvolume.geom.glsl", &geometrySource);
glusLoadTextFile("../Example22/shader/shadowvolume.frag.glsl", &fragmentSource);
glusBuildProgramFromSource(&g_programShadowVolume, (const GLUSchar**) &vertexSource.text, 0, 0, (const GLUSchar**) &geometrySource.text, (const GLUSchar**) &fragmentSource.text);
glusDestroyTextFile(&vertexSource);
glusDestroyTextFile(&geometrySource);
glusDestroyTextFile(&fragmentSource);
//
g_projectionMatrixShadowVolumeLocation = glGetUniformLocation(g_programShadowVolume.program, "u_projectionMatrix");
g_viewMatrixShadowVolumeLocation = glGetUniformLocation(g_programShadowVolume.program, "u_viewMatrix");
g_modelMatrixShadowVolumeLocation = glGetUniformLocation(g_programShadowVolume.program, "u_modelMatrix");
g_lightDirectionShadowVolumeLocation = glGetUniformLocation(g_programShadowVolume.program, "u_lightDirection");
g_vertexShadowVolumeLocation = glGetAttribLocation(g_programShadowVolume.program, "a_vertex");
//
glusLoadTextFile("../Example22/shader/shadow.vert.glsl", &vertexSource);
glusLoadTextFile("../Example22/shader/shadow.frag.glsl", &fragmentSource);
glusBuildProgramFromSource(&g_programShadowPlane, (const GLUSchar**) &vertexSource.text, 0, 0, 0, (const GLUSchar**) &fragmentSource.text);
glusDestroyTextFile(&vertexSource);
glusDestroyTextFile(&fragmentSource);
//
g_vertexShadowPlaneLocation = glGetAttribLocation(g_programShadowPlane.program, "a_vertex");
//
glusCreateTorusf(&torus, 0.5f, 1.0f, 32, 32);
glusCreateAdjacencyShapef(&torusWithAdjacency, &torus);
glusDestroyShapef(&torus);
g_numberIndices = torusWithAdjacency.numberIndices;
glGenBuffers(1, &g_verticesVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
glBufferData(GL_ARRAY_BUFFER, torusWithAdjacency.numberVertices * 4 * sizeof(GLfloat), (GLfloat*) torusWithAdjacency.vertices, GL_STATIC_DRAW);
glGenBuffers(1, &g_normalsVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_normalsVBO);
glBufferData(GL_ARRAY_BUFFER, torusWithAdjacency.numberVertices * 3 * sizeof(GLfloat), (GLfloat*) torusWithAdjacency.normals, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glGenBuffers(1, &g_indicesVBO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesVBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, torusWithAdjacency.numberIndices * sizeof(GLuint), (GLuint*) torusWithAdjacency.indices, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glusDestroyShapef(&torusWithAdjacency);
//
glusCreatePlanef(&plane, 10.0f);
g_numberIndicesPlane = plane.numberIndices;
glGenBuffers(1, &g_verticesPlaneVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesPlaneVBO);
glBufferData(GL_ARRAY_BUFFER, plane.numberVertices * 4 * sizeof(GLfloat), (GLfloat*) plane.vertices, GL_STATIC_DRAW);
glGenBuffers(1, &g_normalsPlaneVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_normalsPlaneVBO);
glBufferData(GL_ARRAY_BUFFER, plane.numberVertices * 3 * sizeof(GLfloat), (GLfloat*) plane.normals, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glGenBuffers(1, &g_indicesPlaneVBO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesPlaneVBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, plane.numberIndices * sizeof(GLuint), (GLuint*) plane.indices, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glusDestroyShapef(&plane);
//
// The plane extends from -1.0 to 1.0 for both sides. So when rendering in NDC, the plane is always fullscreen.
glusCreatePlanef(&shadowPlane, 1.0f);
g_numberIndicesShadowPlane = shadowPlane.numberIndices;
glGenBuffers(1, &g_verticesShadowPlaneVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesShadowPlaneVBO);
glBufferData(GL_ARRAY_BUFFER, shadowPlane.numberVertices * 4 * sizeof(GLfloat), (GLfloat*) shadowPlane.vertices, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glGenBuffers(1, &g_indicesShadowPlaneVBO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesShadowPlaneVBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, shadowPlane.numberIndices * sizeof(GLuint), (GLuint*) shadowPlane.indices, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glusDestroyShapef(&shadowPlane);
//
glusLookAtf(viewMatrix, g_cameraPosition[0], g_cameraPosition[1], g_cameraPosition[2], 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f);
// Bring light from world to camera / view space
glusMatrix4x4MultiplyVector3f(lightDirection, viewMatrix, lightDirection);
glUseProgram(g_program.program);
glUniform3fv(g_lightDirectionLocation, 1, lightDirection);
//
glUseProgram(g_programShadowVolume.program);
glUniform3fv(g_lightDirectionShadowVolumeLocation, 1, lightDirection);
// Torus
glGenVertexArrays(1, &g_vao);
glBindVertexArray(g_vao);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
glVertexAttribPointer(g_vertexLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_vertexLocation);
glBindBuffer(GL_ARRAY_BUFFER, g_normalsVBO);
glVertexAttribPointer(g_normalLocation, 3, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_normalLocation);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesVBO);
// Shadow Volume
glGenVertexArrays(1, &g_vaoShadowVolume);
glBindVertexArray(g_vaoShadowVolume);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
glVertexAttribPointer(g_vertexShadowVolumeLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_vertexShadowVolumeLocation);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesVBO);
// Plane
glGenVertexArrays(1, &g_vaoPlane);
glBindVertexArray(g_vaoPlane);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesPlaneVBO);
glVertexAttribPointer(g_vertexLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_vertexLocation);
glBindBuffer(GL_ARRAY_BUFFER, g_normalsPlaneVBO);
glVertexAttribPointer(g_normalLocation, 3, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_normalLocation);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesPlaneVBO);
// Shadow Plane
glGenVertexArrays(1, &g_vaoShadowPlane);
glBindVertexArray(g_vaoShadowPlane);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesShadowPlaneVBO);
glVertexAttribPointer(g_vertexShadowPlaneLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_vertexShadowPlaneLocation);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesShadowPlaneVBO);
//
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClearDepth(1.0f);
glClearStencil(0);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glPolygonOffset(0.0f, 100.0f);
return GLUS_TRUE;
}
GLUSboolean init(GLUSvoid)
{
// This is a white light.
struct LightProperties light = { { 1.0f, 1.0f, 1.0f }, { 0.3f, 0.3f, 0.3f, 1.0f }, { 1.0f, 1.0f, 1.0f, 1.0f }, { 1.0f, 1.0f, 1.0f, 1.0f } };
// Blue color material with white specular color.
struct MaterialProperties material = { { 0.0f, 0.1f, 0.1f, 1.0f }, { 0.0f, 0.8f, 0.8f, 1.0f }, { 0.6f, 0.6f, 0.6f, 1.0f }, 60.0f };
GLUStextfile vertexSource;
GLUStextfile fragmentSource;
GLUSshape sphere;
GLUSshape plane;
glusLoadTextFile("../Example18/shader/phong.vert.glsl", &vertexSource);
glusLoadTextFile("../Example18/shader/phong.frag.glsl", &fragmentSource);
glusBuildProgramFromSource(&g_program, (const GLUSchar**) &vertexSource.text, 0, 0, 0, (const GLUSchar**) &fragmentSource.text);
glusDestroyTextFile(&vertexSource);
glusDestroyTextFile(&fragmentSource);
//
g_projectionMatrixLocation = glGetUniformLocation(g_program.program, "u_projectionMatrix");
g_viewMatrixLocation = glGetUniformLocation(g_program.program, "u_viewMatrix");
g_modelMatrixLocation = glGetUniformLocation(g_program.program, "u_modelMatrix");
g_normalMatrixLocation = glGetUniformLocation(g_program.program, "u_normalMatrix");
g_light.directionLocation = glGetUniformLocation(g_program.program, "u_light.direction");
g_light.ambientColorLocation = glGetUniformLocation(g_program.program, "u_light.ambientColor");
g_light.diffuseColorLocation = glGetUniformLocation(g_program.program, "u_light.diffuseColor");
g_light.specularColorLocation = glGetUniformLocation(g_program.program, "u_light.specularColor");
g_material.ambientColorLocation = glGetUniformLocation(g_program.program, "u_material.ambientColor");
g_material.diffuseColorLocation = glGetUniformLocation(g_program.program, "u_material.diffuseColor");
g_material.specularColorLocation = glGetUniformLocation(g_program.program, "u_material.specularColor");
g_material.specularExponentLocation = glGetUniformLocation(g_program.program, "u_material.specularExponent");
g_planeLocation = glGetUniformLocation(g_program.program, "u_plane");
g_vertexLocation = glGetAttribLocation(g_program.program, "a_vertex");
g_normalLocation = glGetAttribLocation(g_program.program, "a_normal");
//
// Use a helper function to create a sphere.
glusCreateSpheref(&sphere, 0.5f, 64);
g_numberIndicesSphere = sphere.numberIndices;
glGenBuffers(1, &g_verticesVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
glBufferData(GL_ARRAY_BUFFER, sphere.numberVertices * 4 * sizeof(GLfloat), (GLfloat*) sphere.vertices, GL_STATIC_DRAW);
glGenBuffers(1, &g_normalsVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_normalsVBO);
glBufferData(GL_ARRAY_BUFFER, sphere.numberVertices * 3 * sizeof(GLfloat), (GLfloat*) sphere.normals, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glGenBuffers(1, &g_indicesVBO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesVBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, sphere.numberIndices * sizeof(GLuint), (GLuint*) sphere.indices, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glusDestroyShapef(&sphere);
//
glusCreatePlanef(&plane, 0.5f);
g_numberIndicesPlane = plane.numberIndices;
glGenBuffers(1, &g_verticesPlaneVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesPlaneVBO);
glBufferData(GL_ARRAY_BUFFER, plane.numberVertices * 4 * sizeof(GLfloat), (GLfloat*) plane.vertices, GL_STATIC_DRAW);
glGenBuffers(1, &g_normalsPlaneVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_normalsPlaneVBO);
glBufferData(GL_ARRAY_BUFFER, plane.numberVertices * 3 * sizeof(GLfloat), (GLfloat*) plane.normals, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glGenBuffers(1, &g_indicesPlaneVBO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesPlaneVBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, plane.numberIndices * sizeof(GLuint), (GLuint*) plane.indices, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glusDestroyShapef(&plane);
//
glUseProgram(g_program.program);
glGenVertexArrays(1, &g_vao);
glBindVertexArray(g_vao);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
glVertexAttribPointer(g_vertexLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_vertexLocation);
glBindBuffer(GL_ARRAY_BUFFER, g_normalsVBO);
glVertexAttribPointer(g_normalLocation, 3, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_normalLocation);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesVBO);
//
glGenVertexArrays(1, &g_planeVAO);
glBindVertexArray(g_planeVAO);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesPlaneVBO);
glVertexAttribPointer(g_vertexLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_vertexLocation);
glBindBuffer(GL_ARRAY_BUFFER, g_normalsPlaneVBO);
glVertexAttribPointer(g_normalLocation, 3, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_normalLocation);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesPlaneVBO);
//
glusLookAtf(g_viewMatrix, 0.0f, 0.0f, 3.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f);
glUniformMatrix4fv(g_viewMatrixLocation, 1, GL_FALSE, g_viewMatrix);
//
glusVector3Normalizef(light.direction);
// Transform light to camera space, as it is currently in world space.
glusMatrix4x4MultiplyVector3f(light.direction, g_viewMatrix, light.direction);
// Set up light ...
glUniform3fv(g_light.directionLocation, 1, light.direction);
glUniform4fv(g_light.ambientColorLocation, 1, light.ambientColor);
glUniform4fv(g_light.diffuseColorLocation, 1, light.diffuseColor);
glUniform4fv(g_light.specularColorLocation, 1, light.specularColor);
// ... and material values.
glUniform4fv(g_material.ambientColorLocation, 1, material.ambientColor);
glUniform4fv(g_material.diffuseColorLocation, 1, material.diffuseColor);
glUniform4fv(g_material.specularColorLocation, 1, material.specularColor);
glUniform1f(g_material.specularExponentLocation, material.specularExponent);
//
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClearDepth(1.0f);
glEnable(GL_DEPTH_TEST);
// No back face culling, as we need it for the stencil algorithm.
// Enable the stencil test - mainly needed for the plane.
glEnable(GL_STENCIL_TEST);
return GLUS_TRUE;
}
GLUSboolean initWavefront(GLUSfloat viewMatrix[16], struct LightProperties* light)
{
// Color material with white specular color.
struct MaterialProperties material = { { 0.0f, 1.0f, 1.0f, 1.0f }, { 0.0f, 1.0f, 1.0f, 1.0f }, { 1.0f, 1.0f, 1.0f, 1.0f }, 20.0f };
GLUStextfile vertexSource;
GLUStextfile fragmentSource;
GLUSshape wavefrontObj;
g_viewMatrix = viewMatrix;
g_light = light;
//
glusLoadTextFile("../Example19_ES/shader/phong.vert.glsl", &vertexSource);
glusLoadTextFile("../Example19_ES/shader/phong.frag.glsl", &fragmentSource);
glusBuildProgramFromSource(&g_program, (const GLUSchar**) &vertexSource.text, (const GLUSchar**) &fragmentSource.text);
glusDestroyTextFile(&vertexSource);
glusDestroyTextFile(&fragmentSource);
//
g_projectionMatrixLocation = glGetUniformLocation(g_program.program, "u_projectionMatrix");
g_modelViewMatrixLocation = glGetUniformLocation(g_program.program, "u_modelViewMatrix");
g_normalMatrixLocation = glGetUniformLocation(g_program.program, "u_normalMatrix");
g_lightLocations.directionLocation = glGetUniformLocation(g_program.program, "u_light.direction");
g_lightLocations.ambientColorLocation = glGetUniformLocation(g_program.program, "u_light.ambientColor");
g_lightLocations.diffuseColorLocation = glGetUniformLocation(g_program.program, "u_light.diffuseColor");
g_lightLocations.specularColorLocation = glGetUniformLocation(g_program.program, "u_light.specularColor");
g_material.ambientColorLocation = glGetUniformLocation(g_program.program, "u_material.ambientColor");
g_material.diffuseColorLocation = glGetUniformLocation(g_program.program, "u_material.diffuseColor");
g_material.specularColorLocation = glGetUniformLocation(g_program.program, "u_material.specularColor");
g_material.specularExponentLocation = glGetUniformLocation(g_program.program, "u_material.specularExponent");
g_vertexLocation = glGetAttribLocation(g_program.program, "a_vertex");
g_normalLocation = glGetAttribLocation(g_program.program, "a_normal");
//
// Use a helper function to load an wavefront object file.
glusLoadObjFile("monkey.obj", &wavefrontObj);
g_numberVertices = wavefrontObj.numberVertices;
glGenBuffers(1, &g_verticesVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
glBufferData(GL_ARRAY_BUFFER, wavefrontObj.numberVertices * 4 * sizeof(GLfloat), (GLfloat*) wavefrontObj.vertices, GL_STATIC_DRAW);
glGenBuffers(1, &g_normalsVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_normalsVBO);
glBufferData(GL_ARRAY_BUFFER, wavefrontObj.numberVertices * 3 * sizeof(GLfloat), (GLfloat*) wavefrontObj.normals, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glusDestroyShapef(&wavefrontObj);
//
glUseProgram(g_program.program);
glGenVertexArrays(1, &g_vao);
glBindVertexArray(g_vao);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
glVertexAttribPointer(g_vertexLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_vertexLocation);
glBindBuffer(GL_ARRAY_BUFFER, g_normalsVBO);
glVertexAttribPointer(g_normalLocation, 3, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_normalLocation);
//
glusVector3Normalizef(g_light->direction);
// Set up light ...
// Direction is set later
glUniform4fv(g_lightLocations.ambientColorLocation, 1, g_light->ambientColor);
glUniform4fv(g_lightLocations.diffuseColorLocation, 1, g_light->diffuseColor);
glUniform4fv(g_lightLocations.specularColorLocation, 1, g_light->specularColor);
// ... and material values.
glUniform4fv(g_material.ambientColorLocation, 1, material.ambientColor);
glUniform4fv(g_material.diffuseColorLocation, 1, material.diffuseColor);
glUniform4fv(g_material.specularColorLocation, 1, material.specularColor);
glUniform1f(g_material.specularExponentLocation, material.specularExponent);
//
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClearDepthf(1.0f);
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
return GLUS_TRUE;
}
GLUSboolean init(GLUSvoid)
{
GLUStextfile vertexSource;
GLUStextfile fragmentSource;
GLUStextfile computeSource;
glusLoadTextFile("../Example30/shader/fullscreen.vert.glsl", &vertexSource);
glusLoadTextFile("../Example30/shader/texture.frag.glsl", &fragmentSource);
glusBuildProgramFromSource(&g_program, (const GLchar**)&vertexSource.text, 0, 0, 0, (const GLchar**)&fragmentSource.text);
glusDestroyTextFile(&vertexSource);
glusDestroyTextFile(&fragmentSource);
glusLoadTextFile("../Example30/shader/raytrace.comp.glsl", &computeSource);
glusBuildComputeProgramFromSource(&g_computeProgram, (const GLchar**)&computeSource.text);
glusDestroyTextFile(&computeSource);
//
// Retrieve the uniform locations in the program.
g_textureLocation = glGetUniformLocation(g_program.program, "u_texture");
//
// Generate and bind a texture.
glGenTextures(1, &g_texture);
glBindTexture(GL_TEXTURE_2D, g_texture);
// Create an empty image.
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, g_imageWidth, g_imageHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0);
// Setting the texture parameters.
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glBindTexture(GL_TEXTURE_2D, 0);
//
//
glUseProgram(g_program.program);
glGenVertexArrays(1, &g_vao);
glBindVertexArray(g_vao);
//
// Also bind created texture ...
glBindTexture(GL_TEXTURE_2D, g_texture);
// ... and bind this texture as an image, as we will write to it. see binding = 0 in shader.
glBindImageTexture(0, g_texture, 0, GL_FALSE, 0, GL_WRITE_ONLY, GL_RGBA8);
// ... and as this is texture number 0, bind the uniform to the program.
glUniform1i(g_textureLocation, 0);
//
//
glUseProgram(g_computeProgram.program);
//
// Generate the ray directions depending on FOV, width and height.
if (!glusRaytracePerspectivef(g_directionBuffer, PADDING, 30.0f, WIDTH, HEIGHT))
{
printf("Error: Could not create direction buffer.\n");
return GLUS_FALSE;
}
// Compute shader will use these textures just for input.
glusRaytraceLookAtf(g_positionBuffer, g_directionBuffer, g_directionBuffer, PADDING, WIDTH, HEIGHT, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, -1.0f, 0.0f, 1.0f, 0.0f);
//
// Buffers with the initial ray position and direction.
//
glGenBuffers(1, &g_directionSSBO);
glBindBuffer(GL_SHADER_STORAGE_BUFFER, g_directionSSBO);
glBufferData(GL_SHADER_STORAGE_BUFFER, WIDTH * HEIGHT * (3 + PADDING) * sizeof(GLfloat), g_directionBuffer, GL_STATIC_READ);
// see binding = 1 in the shader
glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 1, g_directionSSBO);
//
glGenBuffers(1, &g_positionSSBO);
glBindBuffer(GL_SHADER_STORAGE_BUFFER, g_positionSSBO);
glBufferData(GL_SHADER_STORAGE_BUFFER, WIDTH * HEIGHT * 4 * sizeof(GLfloat), g_positionBuffer, GL_STATIC_READ);
// see binding = 2 in the shader
glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 2, g_positionSSBO);
return GLUS_TRUE;
}
GLUSboolean init(GLUSvoid)
{
GLfloat textureToWorldNormalMatrix[16];
// The maximum detail level which is 2^s = sMapExtend.
GLuint sMaxDetailLevel;
// The maximum detail level which is 2^t = tMapExtend.
GLuint tMaxDetailLevel;
// The overall maximum detail level from s and t.
GLuint overallMaxDetailLevel;
// Step for s and t direction.
GLfloat detailStep;
GLuint s, t;
GLUStgaimage image;
GLfloat* map = 0;
GLuint* indices = 0;
GLUStextfile vertexSource;
GLUStextfile controlSource;
GLUStextfile evaluationSource;
GLUStextfile geometrySource;
GLUStextfile fragmentSource;
GLfloat lightDirection[3] = { 1.0f, 1.0f, 1.0f };
glusVector3Normalizef(lightDirection);
g_topView.cameraPosition[0] = 0.0f;
g_topView.cameraPosition[1] = 30000.0f * METERS_TO_VIRTUAL_WORLD_SCALE;
g_topView.cameraPosition[2] = 0.0f;
g_topView.cameraPosition[3] = 1.0;
g_topView.cameraDirection[0] = 0.0f;
g_topView.cameraDirection[1] = -1.0f;
g_topView.cameraDirection[2] = 0.0f;
g_topView.cameraUp[0] = 0.0f;
g_topView.cameraUp[1] = 0.0f;
g_topView.cameraUp[2] = -1.0f;
g_topView.fov = 40.0f;
g_personView.cameraPosition[0] = 0.0f;
g_personView.cameraPosition[1] = 4700.0f * METERS_TO_VIRTUAL_WORLD_SCALE;
g_personView.cameraPosition[2] = 0.0f;
g_personView.cameraPosition[3] = 1.0;
g_personView.cameraDirection[0] = 0.0f;
g_personView.cameraDirection[1] = 0.0f;
g_personView.cameraDirection[2] = -1.0f;
g_personView.cameraUp[0] = 0.0f;
g_personView.cameraUp[1] = 1.0f;
g_personView.cameraUp[2] = 0.0f;
g_personView.fov = 60.0f;
g_activeView = &g_personView;
if (!glusLoadTgaImage(NORMAL_MAP, &image))
{
printf("Could not load normal picture '%s'!\n", NORMAL_MAP);
return GLUS_FALSE;
}
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glGenTextures(1, &g_normalMapTexture);
glBindTexture(GL_TEXTURE_RECTANGLE, g_normalMapTexture);
glTexImage2D(GL_TEXTURE_RECTANGLE, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glusDestroyTgaImage(&image);
if (!glusLoadTgaImage(HEIGHT_MAP, &image))
{
printf("Could not load height picture '%s'!\n", HEIGHT_MAP);
return GLUS_FALSE;
}
glGenTextures(1, &g_heightMapTexture);
glBindTexture(GL_TEXTURE_RECTANGLE, g_heightMapTexture);
glTexImage2D(GL_TEXTURE_RECTANGLE, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
g_sMapExtend = (GLfloat) image.width;
g_tMapExtend = (GLfloat) image.height;
glusDestroyTgaImage(&image);
// Calculate the detail level for the s and ...
sMaxDetailLevel = (GLuint) floorf(logf(g_sMapExtend) / logf(2.0f));
// ... t extend
tMaxDetailLevel = (GLuint) floorf(logf(g_tMapExtend) / logf(2.0f));
overallMaxDetailLevel = glusMinf(sMaxDetailLevel, tMaxDetailLevel);
// Do checking of calculated parameters
if (MINIMUM_DETAIL_LEVEL > overallMaxDetailLevel)
{
printf("Detail level to high %d > %d\n", MINIMUM_DETAIL_LEVEL, overallMaxDetailLevel);
return GLUS_FALSE;
}
if (MINIMUM_DETAIL_LEVEL + DETAIL_LEVEL_FIRST_PASS > overallMaxDetailLevel)
{
printf("First pass detail level to high %d > %d\n", MINIMUM_DETAIL_LEVEL + DETAIL_LEVEL_FIRST_PASS, overallMaxDetailLevel);
return GLUS_FALSE;
}
if (powf(2.0f, overallMaxDetailLevel - (MINIMUM_DETAIL_LEVEL + DETAIL_LEVEL_FIRST_PASS)) > 32.0f)
{
printf("Tessellation level to high %d > 32\n", (GLint) powf(2.0f, overallMaxDetailLevel - (MINIMUM_DETAIL_LEVEL + DETAIL_LEVEL_FIRST_PASS)));
return GLUS_FALSE;
}
detailStep = powf(2.0f, overallMaxDetailLevel - MINIMUM_DETAIL_LEVEL);
g_sNumPoints = (GLuint) ceilf(g_sMapExtend / detailStep) - 1;
g_tNumPoints = (GLuint) ceilf(g_tMapExtend / detailStep) - 1;
//
// Generate the flat terrain mesh.
//
map = (GLUSfloat*) malloc(g_sNumPoints * g_tNumPoints * 2 * sizeof(GLfloat));
indices = (GLuint*) malloc(g_sNumPoints * g_tNumPoints * sizeof(GLuint));
for (t = 0; t < g_tNumPoints; t++)
{
for (s = 0; s < g_sNumPoints; s++)
{
map[t * g_sNumPoints * 2 + s * 2 + 0] = 0.5f + detailStep / 2.0f + (GLfloat) s * detailStep;
map[t * g_sNumPoints * 2 + s * 2 + 1] = 0.5f + detailStep / 2.0f + (GLfloat) t * detailStep;
indices[t * g_sNumPoints + s + 0] = (t + 0) * g_sNumPoints + s + 0;
}
}
//
// Transferring vertices and indices into GPU
//
// Pass one
glGenBuffers(1, &g_verticesPassOneVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesPassOneVBO);
glBufferData(GL_ARRAY_BUFFER, g_sNumPoints * g_tNumPoints * 2 * sizeof(GLfloat), map, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glGenBuffers(1, &g_indicesPassOneVBO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesPassOneVBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, g_sNumPoints * g_tNumPoints * sizeof(GLuint), indices, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
// Pass two.
glGenBuffers(1, &g_verticesPassTwoVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesPassTwoVBO);
// Calculate enough space!
glBufferData(GL_ARRAY_BUFFER, g_sNumPoints * g_tNumPoints * (GLuint) pow(4, DETAIL_LEVEL_FIRST_PASS + 1) * 2 * sizeof(GLfloat), 0, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
//
free(map);
map = 0;
free(indices);
indices = 0;
//
if (!glusLoadTgaImage(COLOR_MAP, &image))
{
printf("Could not load color picture '%s'!\n", COLOR_MAP);
return GLUS_FALSE;
}
glGenTextures(1, &g_colorMapTexture);
glBindTexture(GL_TEXTURE_2D, g_colorMapTexture);
glTexImage2D(GL_TEXTURE_2D, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glusDestroyTgaImage(&image);
//
glGenQueries(1, &g_transformFeedbackQuery);
//
// Creating the shader program.
//
// Pass one.
glusLoadTextFile("../Example14/shader/PassOne.vert.glsl", &vertexSource);
glusLoadTextFile("../Example14/shader/PassOne.geom.glsl", &geometrySource);
glusLoadTextFile("../Example14/shader/PassOne.frag.glsl", &fragmentSource);
// Compile and ...
glusCreateProgramFromSource(&g_programPassOne, (const GLUSchar**) &vertexSource.text, 0, 0, (const GLUSchar**) &geometrySource.text, (const GLUSchar**) &fragmentSource.text);
// ... add the transform variable ...
glTransformFeedbackVaryings(g_programPassOne.program, 1, (const GLchar**) &TRANSFORM_VARYING, GL_SEPARATE_ATTRIBS);
// ... and link the program
if (!glusLinkProgram(&g_programPassOne))
{
printf("Could not build program one\n");
return GLUS_FALSE;
}
// Destroy the text resource
glusDestroyTextFile(&vertexSource);
glusDestroyTextFile(&geometrySource);
glusDestroyTextFile(&fragmentSource);
g_halfDetailStepPassOneLocation = glGetUniformLocation(g_programPassOne.program, "u_halfDetailStep");
g_detailLevelPassOneLocation = glGetUniformLocation(g_programPassOne.program, "u_detailLevel");
g_fovRadiusPassOneLocation = glGetUniformLocation(g_programPassOne.program, "u_fovRadius");
g_positionTextureSpacePassOneLocation = glGetUniformLocation(g_programPassOne.program, "u_positionTextureSpace");
g_leftNormalTextureSpacePassOneLocation = glGetUniformLocation(g_programPassOne.program, "u_leftNormalTextureSpace");
g_rightNormalTextureSpacePassOneLocation = glGetUniformLocation(g_programPassOne.program, "u_rightNormalTextureSpace");
g_backNormalTextureSpacePassOneLocation = glGetUniformLocation(g_programPassOne.program, "u_backNormalTextureSpace");
// Pass two.
glusLoadTextFile("../Example14/shader/PassTwo.vert.glsl", &vertexSource);
glusLoadTextFile("../Example14/shader/PassTwo.cont.glsl", &controlSource);
glusLoadTextFile("../Example14/shader/PassTwo.eval.glsl", &evaluationSource);
glusLoadTextFile("../Example14/shader/PassTwo.geom.glsl", &geometrySource);
glusLoadTextFile("../Example14/shader/PassTwo.frag.glsl", &fragmentSource);
if (!glusBuildProgramFromSource(&g_shaderProgramPassTwo, (const GLUSchar**) &vertexSource.text, (const GLUSchar**) &controlSource.text, (const GLUSchar**) &evaluationSource.text, (const GLUSchar**) &geometrySource.text, (const GLUSchar**) &fragmentSource.text))
{
printf("Could not build program two\n");
return GLUS_FALSE;
}
glusDestroyTextFile(&vertexSource);
glusDestroyTextFile(&controlSource);
glusDestroyTextFile(&evaluationSource);
glusDestroyTextFile(&geometrySource);
glusDestroyTextFile(&fragmentSource);
g_maxTessellationLevelPassTwoLocation = glGetUniformLocation(g_shaderProgramPassTwo.program, "u_maxTessellationLevel");
g_quadrantStepPassTwoLocation = glGetUniformLocation(g_shaderProgramPassTwo.program, "u_quadrantStep");
g_positionTextureSpacePassTwoLocation = glGetUniformLocation(g_shaderProgramPassTwo.program, "u_positionTextureSpace");
g_heightMapTexturePassTwoLocation = glGetUniformLocation(g_shaderProgramPassTwo.program, "u_heightMapTexture");
g_normalMapTexturePassTwoLocation = glGetUniformLocation(g_shaderProgramPassTwo.program, "u_normalMapTexture");
g_tmvpPassTwoLocation = glGetUniformLocation(g_shaderProgramPassTwo.program, "u_tmvpMatrix");
g_lightDirectionPassTwoLocation = glGetUniformLocation(g_shaderProgramPassTwo.program, "u_lightDirection");
g_colorMapTexturePassTwoLocation = glGetUniformLocation(g_shaderProgramPassTwo.program, "u_colorMapTexture");
//
// One time matrix calculations to convert between texture and world space
glusMatrix4x4Identityf(g_textureToWorldMatrix);
glusMatrix4x4Identityf(textureToWorldNormalMatrix);
glusMatrix4x4Scalef(g_textureToWorldMatrix, HORIZONTAL_PIXEL_SPACING * METERS_TO_VIRTUAL_WORLD_SCALE, VERTICAL_PIXEL_RANGE * METERS_TO_VIRTUAL_WORLD_SCALE, HORIZONTAL_PIXEL_SPACING * METERS_TO_VIRTUAL_WORLD_SCALE);
// Skip this scale for the normal matrix
glusMatrix4x4Scalef(g_textureToWorldMatrix, 1.0f, 1.0f, -1.0f);
glusMatrix4x4Scalef(textureToWorldNormalMatrix, 1.0f, 1.0f, -1.0f);
glusMatrix4x4Translatef(g_textureToWorldMatrix, -g_sMapExtend / 2.0f, 0.0f, -g_tMapExtend / 2.0f);
// No need for the translation matrix in the normal matrix
glusMatrix4x4Copyf(g_worldToTextureMatrix, g_textureToWorldMatrix, GLUS_FALSE);
glusMatrix4x4Inversef(g_worldToTextureMatrix);
glusMatrix4x4Copyf(g_worldToTextureNormalMatrix, textureToWorldNormalMatrix, GLUS_FALSE);
glusMatrix4x4Inversef(g_worldToTextureNormalMatrix);
// Pass one
glUseProgram(g_programPassOne.program);
glUniform1f(g_halfDetailStepPassOneLocation, detailStep / 2.0f);
glUniform1ui(g_detailLevelPassOneLocation, DETAIL_LEVEL_FIRST_PASS);
glUniform1f(g_fovRadiusPassOneLocation, FOV_RADIUS / HORIZONTAL_PIXEL_SPACING * METERS_TO_VIRTUAL_WORLD_SCALE);
glGenVertexArrays(1, &g_vaoPassOne);
glBindVertexArray(g_vaoPassOne);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesPassOneVBO);
// First 0 is the location = 0. See shader source
glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, 0);
// Enable location = 0
glEnableVertexAttribArray(0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesPassOneVBO);
// Pass two
glUseProgram(g_shaderProgramPassTwo.program);
glUniform3fv(g_lightDirectionPassTwoLocation, 1, lightDirection);
glUniform1ui(g_maxTessellationLevelPassTwoLocation, overallMaxDetailLevel - (MINIMUM_DETAIL_LEVEL + DETAIL_LEVEL_FIRST_PASS));
glUniform1i(g_quadrantStepPassTwoLocation, QUADRANT_STEP);
glGenVertexArrays(1, &g_vaoPassTwo);
glBindVertexArray(g_vaoPassTwo);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesPassTwoVBO);
// First 0 is the location = 0. See shader source
glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, 0);
// Enable location = 0
glEnableVertexAttribArray(0);
//
glActiveTexture(GL_TEXTURE0);
glUniform1i(g_heightMapTexturePassTwoLocation, 0);
glBindTexture(GL_TEXTURE_RECTANGLE, g_heightMapTexture);
glActiveTexture(GL_TEXTURE1);
glUniform1i(g_colorMapTexturePassTwoLocation, 1);
glBindTexture(GL_TEXTURE_2D, g_colorMapTexture);
glActiveTexture(GL_TEXTURE2);
glUniform1i(g_normalMapTexturePassTwoLocation, 2);
glBindTexture(GL_TEXTURE_RECTANGLE, g_normalMapTexture);
//
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClearDepth(1.0f);
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
glPatchParameteri(GL_PATCH_VERTICES, 4);
return GLUS_TRUE;
}
GLUSboolean init(GLUSvoid)
{
GLUSshape background;
GLUSshape torus;
GLUStextfile vertexSource;
GLUStextfile fragmentSource;
GLfloat viewMatrix[16];
GLfloat lightDirection[3];
GLenum none[] = {GL_NONE};
lightDirection[0] = g_lightPosition[0];
lightDirection[1] = g_lightPosition[1];
lightDirection[2] = g_lightPosition[2];
glusVector3Normalizef(lightDirection);
//
glusLoadTextFile("../Example12_ES/shader/rendershadow.vert.glsl", &vertexSource);
glusLoadTextFile("../Example12_ES/shader/rendershadow.frag.glsl", &fragmentSource);
glusBuildProgramFromSource(&g_programShadow, (const GLUSchar**) &vertexSource.text, (const GLUSchar**) &fragmentSource.text);
glusDestroyTextFile(&vertexSource);
glusDestroyTextFile(&fragmentSource);
//
glusLoadTextFile("../Example12_ES/shader/useshadow.vert.glsl", &vertexSource);
glusLoadTextFile("../Example12_ES/shader/useshadow.frag.glsl", &fragmentSource);
glusBuildProgramFromSource(&g_program, (const GLUSchar**) &vertexSource.text, (const GLUSchar**) &fragmentSource.text);
glusDestroyTextFile(&vertexSource);
glusDestroyTextFile(&fragmentSource);
//
g_projectionMatrixShadowLocation = glGetUniformLocation(g_programShadow.program, "u_projectionMatrix");
g_modelViewMatrixShadowLocation = glGetUniformLocation(g_programShadow.program, "u_modelViewMatrix");
g_vertexShadowLocation = glGetAttribLocation(g_programShadow.program, "a_vertex");
//
g_projectionMatrixLocation = glGetUniformLocation(g_program.program, "u_projectionMatrix");
g_viewMatrixLocation = glGetUniformLocation(g_program.program, "u_viewMatrix");
g_modelMatrixLocation = glGetUniformLocation(g_program.program, "u_modelMatrix");
g_normalMatrixLocation = glGetUniformLocation(g_program.program, "u_normalMatrix");
g_shadowMatrixLocation = glGetUniformLocation(g_program.program, "u_shadowMatrix");
g_shadowTextureLocation = glGetUniformLocation(g_program.program, "u_shadowTexture");
g_colorLocation = glGetUniformLocation(g_program.program, "u_shapeColor");
g_lightDirectionLocation = glGetUniformLocation(g_program.program, "u_lightDirection");
g_vertexLocation = glGetAttribLocation(g_program.program, "a_vertex");
g_normalLocation = glGetAttribLocation(g_program.program, "a_normal");
//
glGenTextures(1, &g_shadowTexture);
glBindTexture(GL_TEXTURE_2D, g_shadowTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT24, g_shadowTextureSize, g_shadowTextureSize, 0, GL_DEPTH_COMPONENT, GL_UNSIGNED_BYTE, 0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE, GL_COMPARE_REF_TO_TEXTURE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_FUNC, GL_LESS);
glBindTexture(GL_TEXTURE_2D, 0);
//
glGenFramebuffers(1, &g_fbo);
glBindFramebuffer(GL_FRAMEBUFFER, g_fbo);
glDrawBuffers(1, none);
glReadBuffer(GL_NONE);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, g_shadowTexture, 0);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
{
printf("GL_FRAMEBUFFER_COMPLETE error 0x%x", glCheckFramebufferStatus(GL_FRAMEBUFFER));
return GLUS_FALSE;
}
glClearDepthf(1.0f);
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
//
glusCreateTorusf(&torus, 0.5f, 1.0f, 32, 32);
g_numberIndicesSphere = torus.numberIndices;
glGenBuffers(1, &g_verticesVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
glBufferData(GL_ARRAY_BUFFER, torus.numberVertices * 4 * sizeof(GLfloat), (GLfloat*) torus.vertices, GL_STATIC_DRAW);
glGenBuffers(1, &g_normalsVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_normalsVBO);
glBufferData(GL_ARRAY_BUFFER, torus.numberVertices * 3 * sizeof(GLfloat), (GLfloat*) torus.normals, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glGenBuffers(1, &g_indicesVBO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesVBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, torus.numberIndices * sizeof(GLuint), (GLuint*) torus.indices, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glusDestroyShapef(&torus);
//
glusCreatePlanef(&background, 10.0f);
g_numberIndicesBackground = background.numberIndices;
glGenBuffers(1, &g_verticesBackgroundVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesBackgroundVBO);
glBufferData(GL_ARRAY_BUFFER, background.numberVertices * 4 * sizeof(GLfloat), (GLfloat*) background.vertices, GL_STATIC_DRAW);
glGenBuffers(1, &g_normalsBackgroundVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_normalsBackgroundVBO);
glBufferData(GL_ARRAY_BUFFER, background.numberVertices * 3 * sizeof(GLfloat), (GLfloat*) background.normals, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glGenBuffers(1, &g_indicesBackgroundVBO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesBackgroundVBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, background.numberIndices * sizeof(GLuint), (GLuint*) background.indices, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glusDestroyShapef(&background);
//
glUseProgram(g_program.program);
glusLookAtf(viewMatrix, g_cameraPosition[0], g_cameraPosition[1], g_cameraPosition[2], 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f);
glusMatrix4x4MultiplyVector3f(lightDirection, viewMatrix, lightDirection);
glUniform3fv(g_lightDirectionLocation, 1, lightDirection);
glUniform1i(g_shadowTextureLocation, 0);
// Torus
glGenVertexArrays(1, &g_vao);
glBindVertexArray(g_vao);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
glVertexAttribPointer(g_vertexLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_vertexLocation);
glBindBuffer(GL_ARRAY_BUFFER, g_normalsVBO);
glVertexAttribPointer(g_normalLocation, 3, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_normalLocation);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesVBO);
// Plane
glGenVertexArrays(1, &g_vaoBackground);
glBindVertexArray(g_vaoBackground);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesBackgroundVBO);
glVertexAttribPointer(g_vertexLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_vertexLocation);
glBindBuffer(GL_ARRAY_BUFFER, g_normalsBackgroundVBO);
glVertexAttribPointer(g_normalLocation, 3, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_normalLocation);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesBackgroundVBO);
//
glUseProgram(g_programShadow.program);
// Torus
glGenVertexArrays(1, &g_vaoShadow);
glBindVertexArray(g_vaoShadow);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
glVertexAttribPointer(g_vertexShadowLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_vertexShadowLocation);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesVBO);
// Plane
glGenVertexArrays(1, &g_vaoShadowBackground);
glBindVertexArray(g_vaoShadowBackground);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesBackgroundVBO);
glVertexAttribPointer(g_vertexShadowLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_vertexShadowLocation);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesBackgroundVBO);
//
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClearDepthf(1.0f);
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
// Needed when rendering the shadow map. This will avoid artifacts.
glPolygonOffset(1.0f, 0.0f);
return GLUS_TRUE;
}
GLUSboolean init(GLUSvoid)
{
GLfloat* points = (GLfloat*) malloc(WATER_PLANE_LENGTH * WATER_PLANE_LENGTH * 4 * sizeof(GLfloat));
GLuint* indices = (GLuint*) malloc(WATER_PLANE_LENGTH * (WATER_PLANE_LENGTH - 1) * 2 * sizeof(GLuint));
GLUStgaimage image;
GLUStextfile vertexSource;
GLUStextfile fragmentSource;
GLuint x, z, i, k;
GLuint waterTexture;
for (z = 0; z < WATER_PLANE_LENGTH; z++)
{
for (x = 0; x < WATER_PLANE_LENGTH; x++)
{
points[(x + z * (WATER_PLANE_LENGTH)) * 4 + 0] = -(GLfloat) WATER_PLANE_LENGTH / 2 + 0.5f + (GLfloat) x;
points[(x + z * (WATER_PLANE_LENGTH)) * 4 + 1] = 0.0f;
points[(x + z * (WATER_PLANE_LENGTH)) * 4 + 2] = +(GLfloat) WATER_PLANE_LENGTH / 2 - 0.5f - (GLfloat) z;
points[(x + z * (WATER_PLANE_LENGTH)) * 4 + 3] = 1.0f;
}
}
for (k = 0; k < WATER_PLANE_LENGTH - 1; k++)
{
for (i = 0; i < WATER_PLANE_LENGTH; i++)
{
if (k % 2 == 0)
{
indices[(i + k * (WATER_PLANE_LENGTH)) * 2 + 0] = i + (k + 1) * WATER_PLANE_LENGTH;
indices[(i + k * (WATER_PLANE_LENGTH)) * 2 + 1] = i + k * WATER_PLANE_LENGTH;
}
else
{
indices[(i + k * (WATER_PLANE_LENGTH)) * 2 + 0] = WATER_PLANE_LENGTH - 1 - i + k * WATER_PLANE_LENGTH;
indices[(i + k * (WATER_PLANE_LENGTH)) * 2 + 1] = WATER_PLANE_LENGTH - 1 - i + (k + 1) * WATER_PLANE_LENGTH;
}
}
}
//
glusLoadTextFile("../Example15/shader/Water.vert.glsl", &vertexSource);
glusLoadTextFile("../Example15/shader/Water.frag.glsl", &fragmentSource);
glusBuildProgramFromSource(&g_program, (const GLUSchar**) &vertexSource.text, 0, 0, 0, (const GLUSchar**) &fragmentSource.text);
glusDestroyTextFile(&vertexSource);
glusDestroyTextFile(&fragmentSource);
//
g_projectionMatrixLocation = glGetUniformLocation(g_program.program, "u_projectionMatrix");
g_viewMatrixLocation = glGetUniformLocation(g_program.program, "u_viewMatrix");
g_inverseViewNormalMatrixLocation = glGetUniformLocation(g_program.program, "u_inverseViewNormalMatrix");
g_waterPlaneLengthLocation = glGetUniformLocation(g_program.program, "u_waterPlaneLength");
g_cubemapLocation = glGetUniformLocation(g_program.program, "u_cubemap");
g_waterTextureLocation = glGetUniformLocation(g_program.program, "u_waterTexture");
g_passedTimeLocation = glGetUniformLocation(g_program.program, "u_passedTime");
g_waveParametersLocation = glGetUniformLocation(g_program.program, "u_waveParameters");
g_waveDirectionsLocation = glGetUniformLocation(g_program.program, "u_waveDirections");
g_vertexLocation = glGetAttribLocation(g_program.program, "a_vertex");
//
glGenBuffers(1, &g_verticesVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
glBufferData(GL_ARRAY_BUFFER, WATER_PLANE_LENGTH * WATER_PLANE_LENGTH * 4 * sizeof(GLfloat), (GLfloat*) points, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glGenBuffers(1, &g_indicesVBO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesVBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, WATER_PLANE_LENGTH * (WATER_PLANE_LENGTH - 1) * 2 * sizeof(GLuint), (GLuint*) indices, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
//
free(points);
free(indices);
//
glGenTextures(1, &g_cubemap);
glBindTexture(GL_TEXTURE_CUBE_MAP, g_cubemap);
glusLoadTgaImage("water_pos_x.tga", &image);
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
glusLoadTgaImage("water_neg_x.tga", &image);
glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_X, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
glusLoadTgaImage("water_pos_y.tga", &image);
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_Y, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
glusLoadTgaImage("water_neg_y.tga", &image);
glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_Y, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
glusLoadTgaImage("water_pos_z.tga", &image);
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_Z, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
glusLoadTgaImage("water_neg_z.tga", &image);
glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_Z, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
//
waterTexture = initWaterTexture((GLUSfloat) WATER_PLANE_LENGTH);
glUseProgram(g_program.program);
glUniform1f(g_waterPlaneLengthLocation, (GLUSfloat) WATER_PLANE_LENGTH);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_CUBE_MAP, g_cubemap);
glUniform1i(g_cubemapLocation, 0);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, waterTexture);
glUniform1i(g_waterTextureLocation, 1);
glGenVertexArrays(1, &g_vao);
glBindVertexArray(g_vao);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
glVertexAttribPointer(g_vertexLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_vertexLocation);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesVBO);
//
initBackground();
//
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClearDepth(1.0f);
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
return GLUS_TRUE;
}
GLUSboolean init(GLUSvoid)
{
GLfloat viewMatrix[16];
GLfloat normalMatrix[9];
// This is a white light.
struct LightProperties light = { { 1.0f, 1.0f, 1.0f }, { 0.3f, 0.3f, 0.3f, 1.0f }, { 1.0f, 1.0f, 1.0f, 1.0f }, { 1.0f, 1.0f, 1.0f, 1.0f } };
// Blue color material with white specular color.
struct MaterialProperties material = { { 0.0f, 0.0f, 1.0f, 1.0f }, { 0.0f, 0.0f, 1.0f, 1.0f }, { 1.0f, 1.0f, 1.0f, 1.0f }, 20.0f };
GLUStextfile vertexSource;
GLUStextfile fragmentSource;
GLUSshape sphere;
glusLoadTextFile("../Example05/shader/phong.vert.glsl", &vertexSource);
glusLoadTextFile("../Example05/shader/phong.frag.glsl", &fragmentSource);
glusBuildProgramFromSource(&g_program, (const GLUSchar**) &vertexSource.text, 0, 0, 0, (const GLUSchar**) &fragmentSource.text);
glusDestroyTextFile(&vertexSource);
glusDestroyTextFile(&fragmentSource);
//
g_projectionMatrixLocation = glGetUniformLocation(g_program.program, "u_projectionMatrix");
g_modelViewMatrixLocation = glGetUniformLocation(g_program.program, "u_modelViewMatrix");
g_normalMatrixLocation = glGetUniformLocation(g_program.program, "u_normalMatrix");
g_light.directionLocation = glGetUniformLocation(g_program.program, "u_light.direction");
g_light.ambientColorLocation = glGetUniformLocation(g_program.program, "u_light.ambientColor");
g_light.diffuseColorLocation = glGetUniformLocation(g_program.program, "u_light.diffuseColor");
g_light.specularColorLocation = glGetUniformLocation(g_program.program, "u_light.specularColor");
g_material.ambientColorLocation = glGetUniformLocation(g_program.program, "u_material.ambientColor");
g_material.diffuseColorLocation = glGetUniformLocation(g_program.program, "u_material.diffuseColor");
g_material.specularColorLocation = glGetUniformLocation(g_program.program, "u_material.specularColor");
g_material.specularExponentLocation = glGetUniformLocation(g_program.program, "u_material.specularExponent");
g_vertexLocation = glGetAttribLocation(g_program.program, "a_vertex");
g_normalLocation = glGetAttribLocation(g_program.program, "a_normal");
//
// Use a helper function to create a sphere.
glusCreateSpheref(&sphere, 0.5f, 32);
g_numberIndices = sphere.numberIndices;
glGenBuffers(1, &g_verticesVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
glBufferData(GL_ARRAY_BUFFER, sphere.numberVertices * 4 * sizeof(GLfloat), (GLfloat*) sphere.vertices, GL_STATIC_DRAW);
glGenBuffers(1, &g_normalsVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_normalsVBO);
glBufferData(GL_ARRAY_BUFFER, sphere.numberVertices * 3 * sizeof(GLfloat), (GLfloat*) sphere.normals, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glGenBuffers(1, &g_indicesVBO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesVBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, sphere.numberIndices * sizeof(GLuint), (GLuint*) sphere.indices, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glusDestroyShapef(&sphere);
//
glUseProgram(g_program.program);
glGenVertexArrays(1, &g_vao);
glBindVertexArray(g_vao);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
glVertexAttribPointer(g_vertexLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_vertexLocation);
glBindBuffer(GL_ARRAY_BUFFER, g_normalsVBO);
glVertexAttribPointer(g_normalLocation, 3, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_normalLocation);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesVBO);
//
glusLookAtf(viewMatrix, 0.0f, 0.0f, 5.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f);
// The calculations are done in camera / view space. So pass the view matrix, which is a rigid body transform.
glusMatrixExtract3x3f(normalMatrix, viewMatrix);
glUniformMatrix4fv(g_modelViewMatrixLocation, 1, GL_FALSE, viewMatrix);
glUniformMatrix3fv(g_normalMatrixLocation, 1, GL_FALSE, normalMatrix);
//
glusVectorNormalizef(light.direction);
// Transform light to camera space, as it is currently in world space.
glusMatrixMultiplyVectorf(light.direction, viewMatrix, light.direction);
// Set up light ...
glUniform3fv(g_light.directionLocation, 1, light.direction);
glUniform4fv(g_light.ambientColorLocation, 1, light.ambientColor);
glUniform4fv(g_light.diffuseColorLocation, 1, light.diffuseColor);
glUniform4fv(g_light.specularColorLocation, 1, light.specularColor);
// ... and material values.
glUniform4fv(g_material.ambientColorLocation, 1, material.ambientColor);
glUniform4fv(g_material.diffuseColorLocation, 1, material.diffuseColor);
glUniform4fv(g_material.specularColorLocation, 1, material.specularColor);
glUniform1f(g_material.specularExponentLocation, material.specularExponent);
//
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClearDepth(1.0f);
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
return GLUS_TRUE;
}
GLUSboolean init(GLUSvoid)
{
GLUStextfile vertexSource;
GLUStextfile fragmentSource;
GLUStgaimage image;
GLUSshape plane;
GLint i;
//
glusLookAtf(g_viewMatrix, g_camera.eye[0], g_camera.eye[1], g_camera.eye[2], g_camera.center[0], g_camera.center[1], g_camera.center[2], g_camera.up[0], g_camera.up[1], g_camera.up[2]);
//
if (!initWavefront(g_viewMatrix, &g_light))
{
return GLUS_FALSE;
}
//
glusLoadTextFile("../Example28/shader/texture.vert.glsl", &vertexSource);
glusLoadTextFile("../Example28/shader/texture.frag.glsl", &fragmentSource);
glusBuildProgramFromSource(&g_program, (const GLUSchar**)&vertexSource.text, 0, 0, 0, (const GLUSchar**)&fragmentSource.text);
glusDestroyTextFile(&vertexSource);
glusDestroyTextFile(&fragmentSource);
//
// Retrieve the uniform locations in the program.
g_viewProjectionMatrixLocation = glGetUniformLocation(g_program.program, "u_viewProjectionMatrix");
g_modelMatrixLocation = glGetUniformLocation(g_program.program, "u_modelMatrix");
g_normalMatrixLocation = glGetUniformLocation(g_program.program, "u_normalMatrix");
g_lightDirectionLocation = glGetUniformLocation(g_program.program, "u_lightDirection");
g_repeatLocation = glGetUniformLocation(g_program.program, "u_repeat");
g_textureLocation = glGetUniformLocation(g_program.program, "u_texture");
// Retrieve the attribute locations in the program.
g_vertexLocation = glGetAttribLocation(g_program.program, "a_vertex");
g_normalLocation = glGetAttribLocation(g_program.program, "a_normal");
g_texCoordLocation = glGetAttribLocation(g_program.program, "a_texCoord");
//
// SSAO shader etc.
//
glusLoadTextFile("../Example28/shader/ssao.vert.glsl", &vertexSource);
glusLoadTextFile("../Example28/shader/ssao.frag.glsl", &fragmentSource);
glusBuildProgramFromSource(&g_ssaoProgram, (const GLUSchar**)&vertexSource.text, 0, 0, 0, (const GLUSchar**)&fragmentSource.text);
glusDestroyTextFile(&vertexSource);
glusDestroyTextFile(&fragmentSource);
//
// Retrieve the uniform locations in the program.
g_ssaoTextureLocation = glGetUniformLocation(g_ssaoProgram.program, "u_texture");
g_ssaoNormalTextureLocation = glGetUniformLocation(g_ssaoProgram.program, "u_normalTexture");
g_ssaoDepthTextureLocation = glGetUniformLocation(g_ssaoProgram.program, "u_depthTexture");
g_ssaoKernelLocation = glGetUniformLocation(g_ssaoProgram.program, "u_kernel");
g_ssaoRotationNoiseTextureLocation = glGetUniformLocation(g_ssaoProgram.program, "u_rotationNoiseTexture");
g_ssaoRotationNoiseScaleLocation = glGetUniformLocation(g_ssaoProgram.program, "u_rotationNoiseScale");
g_ssaoInverseProjectionMatrixLocation = glGetUniformLocation(g_ssaoProgram.program, "u_inverseProjectionMatrix");
g_ssaoProjectionMatrixLocation = glGetUniformLocation(g_ssaoProgram.program, "u_projectionMatrix");
g_ssaoRadiusLocation = glGetUniformLocation(g_ssaoProgram.program, "u_radius");
// Retrieve the attribute locations in the program.
g_ssaoVertexLocation = glGetAttribLocation(g_ssaoProgram.program, "a_vertex");
g_ssaoTexCoordLocation = glGetAttribLocation(g_ssaoProgram.program, "a_texCoord");
//
// Blur shader etc.
//
glusLoadTextFile("../Example28/shader/blur.vert.glsl", &vertexSource);
glusLoadTextFile("../Example28/shader/blur.frag.glsl", &fragmentSource);
glusBuildProgramFromSource(&g_blurProgram, (const GLUSchar**)&vertexSource.text, 0, 0, 0, (const GLUSchar**)&fragmentSource.text);
glusDestroyTextFile(&vertexSource);
glusDestroyTextFile(&fragmentSource);
//
// Retrieve the uniform locations in the program.
g_blurColorTextureLocation = glGetUniformLocation(g_blurProgram.program, "u_colorTexture");
g_blurSSAOTextureLocation = glGetUniformLocation(g_blurProgram.program, "u_ssaoTexture");
g_blurTexelStepLocation = glGetUniformLocation(g_blurProgram.program, "u_texelStep");
g_blurNoSSAOLocation = glGetUniformLocation(g_blurProgram.program, "u_noSSAO");
// Retrieve the attribute locations in the program.
g_blurVertexLocation = glGetAttribLocation(g_blurProgram.program, "a_vertex");
g_blurTexCoordLocation = glGetAttribLocation(g_blurProgram.program, "a_texCoord");
//
// Texture set up for the ground plane.
//
glusLoadTgaImage("wood_texture.tga", &image);
glGenTextures(1, &g_texture);
glBindTexture(GL_TEXTURE_2D, g_texture);
glTexImage2D(GL_TEXTURE_2D, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
// Mipmap generation is now included in OpenGL 3 and above
glGenerateMipmap(GL_TEXTURE_2D);
// Trilinear filtering
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glBindTexture(GL_TEXTURE_2D, 0);
//
// Setting up the SSAO frame buffer.
//
glGenTextures(1, &g_ssaoTexture);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, g_ssaoTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GLUS_RGB, TEXTURE_WIDTH, TEXTURE_HEIGHT, 0, GLUS_RGB, GL_UNSIGNED_BYTE, 0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glBindTexture(GL_TEXTURE_2D, 0);
//
glGenTextures(1, &g_ssaoNormalTexture);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, g_ssaoNormalTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GLUS_RGB, TEXTURE_WIDTH, TEXTURE_HEIGHT, 0, GLUS_RGB, GL_UNSIGNED_BYTE, 0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glBindTexture(GL_TEXTURE_2D, 0);
//
glGenTextures(1, &g_ssaoDepthTexture);
glActiveTexture(GL_TEXTURE2);
glBindTexture(GL_TEXTURE_2D, g_ssaoDepthTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT32F, TEXTURE_WIDTH, TEXTURE_HEIGHT, 0, GL_DEPTH_COMPONENT, GL_FLOAT, 0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glBindTexture(GL_TEXTURE_2D, 0);
//
glGenFramebuffers(1, &g_ssaoFBO);
glBindFramebuffer(GL_FRAMEBUFFER, g_ssaoFBO);
// Attach the color buffer ...
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, g_ssaoTexture, 0);
// Attach the normal buffer ...
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, GL_TEXTURE_2D, g_ssaoNormalTexture, 0);
// ... and the depth buffer,
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, g_ssaoDepthTexture, 0);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
{
printf("GL_FRAMEBUFFER_COMPLETE error 0x%x", glCheckFramebufferStatus(GL_FRAMEBUFFER));
return GLUS_FALSE;
}
glBindFramebuffer(GL_FRAMEBUFFER, 0);
//
// Setting up the blur frame buffer
//
glGenTextures(1, &g_blurTexture);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, g_blurTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GLUS_RGB, TEXTURE_WIDTH, TEXTURE_HEIGHT, 0, GLUS_RGB, GL_UNSIGNED_BYTE, 0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glBindTexture(GL_TEXTURE_2D, 0);
//
glGenFramebuffers(1, &g_blurFBO);
glBindFramebuffer(GL_FRAMEBUFFER, g_blurFBO);
// Attach the color buffer ...
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, g_blurTexture, 0);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
{
printf("GL_FRAMEBUFFER_COMPLETE error 0x%x", glCheckFramebufferStatus(GL_FRAMEBUFFER));
return GLUS_FALSE;
}
glBindFramebuffer(GL_FRAMEBUFFER, 0);
//
// Ground plane setup.
//
glusCreatePlanef(&plane, 20.0f);
g_numberIndicesPlane = plane.numberIndices;
glGenBuffers(1, &g_verticesVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
glBufferData(GL_ARRAY_BUFFER, plane.numberVertices * 4 * sizeof(GLfloat), (GLfloat*)plane.vertices, GL_STATIC_DRAW);
glGenBuffers(1, &g_normalsVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_normalsVBO);
glBufferData(GL_ARRAY_BUFFER, plane.numberVertices * 3 * sizeof(GLfloat), (GLfloat*)plane.normals, GL_STATIC_DRAW);
glGenBuffers(1, &g_texCoordsVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_texCoordsVBO);
glBufferData(GL_ARRAY_BUFFER, plane.numberVertices * 2 * sizeof(GLfloat), (GLfloat*)plane.texCoords, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glGenBuffers(1, &g_indicesVBO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesVBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, plane.numberIndices * sizeof(GLuint), (GLuint*)plane.indices, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glusDestroyShapef(&plane);
//
glUseProgram(g_program.program);
glGenVertexArrays(1, &g_vao);
glBindVertexArray(g_vao);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
glVertexAttribPointer(g_vertexLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_vertexLocation);
glBindBuffer(GL_ARRAY_BUFFER, g_normalsVBO);
glVertexAttribPointer(g_normalLocation, 3, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_normalLocation);
glBindBuffer(GL_ARRAY_BUFFER, g_texCoordsVBO);
glVertexAttribPointer(g_texCoordLocation, 2, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_texCoordLocation);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesVBO);
glBindVertexArray(0);
//
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, g_texture);
glUniform1i(g_textureLocation, 0);
// How many times the surface texture is repeated.
glUniform1f(g_repeatLocation, 6.0f);
//
// Post process plane setup.
//
glusCreatePlanef(&plane, 1.0f);
g_numberIndicesPostprocessPlane = plane.numberIndices;
glGenBuffers(1, &g_postprocessVerticesVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_postprocessVerticesVBO);
glBufferData(GL_ARRAY_BUFFER, plane.numberVertices * 4 * sizeof(GLfloat), (GLfloat*)plane.vertices, GL_STATIC_DRAW);
glGenBuffers(1, &g_postprocessTexCoordsVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_postprocessTexCoordsVBO);
glBufferData(GL_ARRAY_BUFFER, plane.numberVertices * 2 * sizeof(GLfloat), (GLfloat*)plane.texCoords, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glGenBuffers(1, &g_postprocessIndicesVBO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_postprocessIndicesVBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, plane.numberIndices * sizeof(GLuint), (GLuint*)plane.indices, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glusDestroyShapef(&plane);
//
glUseProgram(g_ssaoProgram.program);
glGenVertexArrays(1, &g_ssaoVAO);
glBindVertexArray(g_ssaoVAO);
glBindBuffer(GL_ARRAY_BUFFER, g_postprocessVerticesVBO);
glVertexAttribPointer(g_ssaoVertexLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_ssaoVertexLocation);
glBindBuffer(GL_ARRAY_BUFFER, g_postprocessTexCoordsVBO);
glVertexAttribPointer(g_ssaoTexCoordLocation, 2, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_ssaoTexCoordLocation);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_postprocessIndicesVBO);
glBindVertexArray(0);
//
glUniform1i(g_ssaoTextureLocation, 0);
glUniform1i(g_ssaoNormalTextureLocation, 1);
glUniform1i(g_ssaoDepthTextureLocation, 2);
glUniform1i(g_ssaoRotationNoiseTextureLocation, 3);
glUniform1f(g_ssaoRadiusLocation, SSAO_RADIUS);
//
// Create the Kernel for SSAO.
//
for (i = 0; i < KERNEL_SIZE; i++)
{
g_kernel[i * 3 + 0] = glusRandomUniformGetFloatf(-1.0f, 1.0f);
g_kernel[i * 3 + 1] = glusRandomUniformGetFloatf(-1.0f, 1.0f);
g_kernel[i * 3 + 2] = glusRandomUniformGetFloatf(0.0f, 1.0f); // Kernel hemisphere points to positive Z-Axis.
glusVector3Normalizef(&g_kernel[i * 3]); // Normalize, so included in the hemisphere.
GLfloat scale = (GLfloat)i / (GLfloat)KERNEL_SIZE; // Create a scale value between [0;1[ .
scale = glusClampf(scale * scale, 0.1f, 1.0f); // Adjust scale, that there are more values closer to the center of the g_kernel.
glusVector3MultiplyScalarf(&g_kernel[i * 3], &g_kernel[i * 3], scale);
}
// Pass g_kernel to shader
glUniform3fv(g_ssaoKernelLocation, KERNEL_SIZE, g_kernel);
//
// Create the rotation noise texture
//
for (i = 0; i < ROTATION_NOISE_SIZE; i++)
{
g_rotationNoise[i * 3 + 0] = glusRandomUniformGetFloatf(-1.0f, 1.0f);
g_rotationNoise[i * 3 + 1] = glusRandomUniformGetFloatf(-1.0f, 1.0f);
g_rotationNoise[i * 3 + 2] = 0.0f; // Rotate on x-y-plane, so z is zero.
glusVector3Normalizef(&g_rotationNoise[i * 3]); // Normalized rotation vector.
}
//
glGenTextures(1, &g_ssaoRotationNoiseTexture);
glBindTexture(GL_TEXTURE_2D, g_ssaoRotationNoiseTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB32F, ROTATION_NOISE_SIDE_LENGTH, ROTATION_NOISE_SIDE_LENGTH, 0, GL_RGB, GL_FLOAT, g_rotationNoise);
// No filtering
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glBindTexture(GL_TEXTURE_2D, 0);
//
//
g_rotationNoiseScale[0] = (GLfloat)TEXTURE_WIDTH / (GLfloat)ROTATION_NOISE_SIDE_LENGTH;
g_rotationNoiseScale[1] = (GLfloat)TEXTURE_HEIGHT / (GLfloat)ROTATION_NOISE_SIDE_LENGTH;
// Pass the scale, as the rotation noise texture is repeated over the screen x / y times.
glUniform2fv(g_ssaoRotationNoiseScaleLocation, 1, g_rotationNoiseScale);
//
//
glUseProgram(g_blurProgram.program);
glGenVertexArrays(1, &g_blurVAO);
glBindVertexArray(g_blurVAO);
glBindBuffer(GL_ARRAY_BUFFER, g_postprocessVerticesVBO);
glVertexAttribPointer(g_blurVertexLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_blurVertexLocation);
glBindBuffer(GL_ARRAY_BUFFER, g_postprocessTexCoordsVBO);
glVertexAttribPointer(g_blurTexCoordLocation, 2, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_blurTexCoordLocation);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_postprocessIndicesVBO);
glBindVertexArray(0);
//
glUniform1i(g_blurColorTextureLocation, 0);
glUniform1i(g_blurSSAOTextureLocation, 1);
g_texelStep[0] = 1.0f / (GLfloat)TEXTURE_WIDTH;
g_texelStep[1] = 1.0f / (GLfloat)TEXTURE_HEIGHT;
// Pass the value to step from one to another texel.
glUniform2fv(g_blurTexelStepLocation, 1, g_texelStep);
// Variable to toggle between SSAO on and off
glUniform1f(g_blurNoSSAOLocation, 0.0f);
//
// Basic OpenGL set up.
//
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClearDepth(1.0f);
glEnable(GL_DEPTH_TEST);
return GLUS_TRUE;
}
GLUSuint initWaterTexture(GLUSfloat waterPlaneLength)
{
GLfloat projectionMatrixWaterTexture[16];
GLfloat modelViewMatrixWaterTexture[16];
GLUSshape plane;
GLUStextfile vertexSource;
GLUStextfile fragmentSource;
glusLoadTextFile("../Example15/shader/WaterTexture.vert.glsl", &vertexSource);
glusLoadTextFile("../Example15/shader/WaterTexture.frag.glsl", &fragmentSource);
glusBuildProgramFromSource(&g_programWaterTexture, (const GLUSchar**) &vertexSource.text, 0, 0, 0, (const GLUSchar**) &fragmentSource.text);
glusDestroyTextFile(&vertexSource);
glusDestroyTextFile(&fragmentSource);
//
g_projectionMatrixWaterTextureLocation = glGetUniformLocation(g_programWaterTexture.program, "u_projectionMatrix");
g_modelViewMatrixWaterTextureLocation = glGetUniformLocation(g_programWaterTexture.program, "u_modelViewMatrix");
g_waterPlaneLengthWaterTextureLocation = glGetUniformLocation(g_programWaterTexture.program, "u_waterPlaneLength");
g_passedTimeWaterTextureLocation = glGetUniformLocation(g_programWaterTexture.program, "u_passedTime");
g_waveParametersWaterTextureLocation = glGetUniformLocation(g_programWaterTexture.program, "u_waveParameters");
g_waveDirectionsWaterTextureLocation = glGetUniformLocation(g_programWaterTexture.program, "u_waveDirections");
g_vertexWaterTextureLocation = glGetAttribLocation(g_programWaterTexture.program, "a_vertex");
g_texCoordWaterTextureLocation = glGetAttribLocation(g_programWaterTexture.program, "a_texCoord");
//
glGenTextures(1, &g_mirrorTexture);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, g_mirrorTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GLUS_RGB, TEXTURE_SIZE, TEXTURE_SIZE, 0, GLUS_RGB, GL_UNSIGNED_BYTE, 0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glBindTexture(GL_TEXTURE_2D, 0);
//
glGenRenderbuffers(1, &g_depthMirrorTexture);
glBindRenderbuffer(GL_RENDERBUFFER, g_depthMirrorTexture);
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, TEXTURE_SIZE, TEXTURE_SIZE);
glBindRenderbuffer(GL_RENDERBUFFER, 0);
//
glGenFramebuffers(1, &g_fboWaterTexture);
glBindFramebuffer(GL_FRAMEBUFFER, g_fboWaterTexture);
// Attach the color buffer ...
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, g_mirrorTexture, 0);
// ... and the depth buffer,
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, g_depthMirrorTexture);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
{
printf("GL_FRAMEBUFFER_COMPLETE error 0x%x", glCheckFramebufferStatus(GL_FRAMEBUFFER));
return GLUS_FALSE;
}
glBindFramebuffer(GL_FRAMEBUFFER, 0);
//
glBindVertexArray(0);
//
glusCreatePlanef(&plane, TEXTURE_SIZE / 2.0f);
g_numberIndicesWaterTexture = plane.numberIndices;
glGenBuffers(1, &g_verticesWaterTextureVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesWaterTextureVBO);
glBufferData(GL_ARRAY_BUFFER, plane.numberVertices * 4 * sizeof(GLfloat), (GLfloat*) plane.vertices, GL_STATIC_DRAW);
glGenBuffers(1, &g_texCoordsWaterTextureVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_texCoordsWaterTextureVBO);
glBufferData(GL_ARRAY_BUFFER, plane.numberVertices * 2 * sizeof(GLfloat), (GLfloat*) plane.texCoords, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glGenBuffers(1, &g_indicesWaterTextureVBO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesWaterTextureVBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, plane.numberIndices * sizeof(GLuint), (GLuint*) plane.indices, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glusDestroyShapef(&plane);
//
glUseProgram(g_programWaterTexture.program);
glusLookAtf(modelViewMatrixWaterTexture, 0.0f, 0.0f, 5.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f);
glUniformMatrix4fv(g_modelViewMatrixWaterTextureLocation, 1, GL_FALSE, modelViewMatrixWaterTexture);
glusOrthof(projectionMatrixWaterTexture, -(GLfloat) TEXTURE_SIZE / 2, (GLfloat) TEXTURE_SIZE / 2, -(GLfloat) TEXTURE_SIZE / 2, (GLfloat) TEXTURE_SIZE / 2, 1.0f, 100.0f);
glUniformMatrix4fv(g_projectionMatrixWaterTextureLocation, 1, GL_FALSE, projectionMatrixWaterTexture);
glUniform1f(g_waterPlaneLengthWaterTextureLocation, waterPlaneLength);
//
glGenVertexArrays(1, &g_vaoWaterTexture);
glBindVertexArray(g_vaoWaterTexture);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesWaterTextureVBO);
glVertexAttribPointer(g_vertexWaterTextureLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_vertexWaterTextureLocation);
glBindBuffer(GL_ARRAY_BUFFER, g_texCoordsWaterTextureVBO);
glVertexAttribPointer(g_texCoordWaterTextureLocation, 2, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_texCoordWaterTextureLocation);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesWaterTextureVBO);
//
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClearDepth(1.0f);
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
return g_mirrorTexture;
}
GLUSboolean init(GLUSvoid)
{
GLUStextfile vertexSource;
GLUStextfile fragmentSource;
GLUStgaimage image;
GLUSshape plane;
//
glusLookAtf(g_viewMatrix, g_camera.eye[0], g_camera.eye[1], g_camera.eye[2], g_camera.center[0], g_camera.center[1], g_camera.center[2], g_camera.up[0], g_camera.up[1], g_camera.up[2]);
//
if (!initWavefront(g_viewMatrix, &g_light))
{
return GLUS_FALSE;
}
//
glusLoadTextFile("../Example19_ES/shader/basic_proj.vert.glsl", &vertexSource);
glusLoadTextFile("../Example19_ES/shader/texture_multi_proj.frag.glsl", &fragmentSource);
glusBuildProgramFromSource(&g_program, (const GLUSchar**) &vertexSource.text, (const GLUSchar**) &fragmentSource.text);
glusDestroyTextFile(&vertexSource);
glusDestroyTextFile(&fragmentSource);
//
// Retrieve the uniform locations in the program.
g_viewProjectionMatrixLocation = glGetUniformLocation(g_program.program, "u_viewProjectionMatrix");
g_viewProjectionBiasTextureMatrixLocation = glGetUniformLocation(g_program.program, "u_viewProjectionBiasTextureMatrix");
g_modelMatrixLocation = glGetUniformLocation(g_program.program, "u_modelMatrix");
g_normalMatrixLocation = glGetUniformLocation(g_program.program, "u_normalMatrix");
g_lightDirectionLocation = glGetUniformLocation(g_program.program, "u_lightDirection");
g_repeatLocation = glGetUniformLocation(g_program.program, "u_repeat");
g_textureLocation = glGetUniformLocation(g_program.program, "u_texture");
g_mirrorTextureLocation = glGetUniformLocation(g_program.program, "u_mirrorTexture");
// Retrieve the attribute locations in the program.
g_vertexLocation = glGetAttribLocation(g_program.program, "a_vertex");
g_normalLocation = glGetAttribLocation(g_program.program, "a_normal");
g_texCoordLocation = glGetAttribLocation(g_program.program, "a_texCoord");
//
// Texture set up.
glusLoadTgaImage("ice.tga", &image);
glGenTextures(1, &g_texture);
glBindTexture(GL_TEXTURE_2D, g_texture);
glTexImage2D(GL_TEXTURE_2D, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
// Mipmap generation is now included in OpenGL 3 and above
glGenerateMipmap(GL_TEXTURE_2D);
// Trilinear filtering
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glBindTexture(GL_TEXTURE_2D, 0);
//
// Setting up the offscreen frame buffer.
//
glGenTextures(1, &g_mirrorTexture);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, g_mirrorTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GLUS_RGB, TEXTURE_WIDTH, TEXTURE_HEIGHT, 0, GLUS_RGB, GL_UNSIGNED_BYTE, 0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glBindTexture(GL_TEXTURE_2D, 0);
//
glGenRenderbuffers(1, &g_depthMirrorTexture);
glBindRenderbuffer(GL_RENDERBUFFER, g_depthMirrorTexture);
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT24, TEXTURE_WIDTH, TEXTURE_HEIGHT);
glBindRenderbuffer(GL_RENDERBUFFER, 0);
//
glGenFramebuffers(1, &g_fboMirrorTexture);
glBindFramebuffer(GL_FRAMEBUFFER, g_fboMirrorTexture);
// Attach the color buffer ...
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, g_mirrorTexture, 0);
// ... and the depth buffer,
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, g_depthMirrorTexture);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
{
printf("GL_FRAMEBUFFER_COMPLETE error 0x%x", glCheckFramebufferStatus(GL_FRAMEBUFFER));
return GLUS_FALSE;
}
glBindFramebuffer(GL_FRAMEBUFFER, 0);
//
//
//
glusCreatePlanef(&plane, 3.0f);
g_numberIndicesSphere = plane.numberIndices;
glGenBuffers(1, &g_verticesVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
glBufferData(GL_ARRAY_BUFFER, plane.numberVertices * 4 * sizeof(GLfloat), (GLfloat*) plane.vertices, GL_STATIC_DRAW);
glGenBuffers(1, &g_normalsVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_normalsVBO);
glBufferData(GL_ARRAY_BUFFER, plane.numberVertices * 3 * sizeof(GLfloat), (GLfloat*) plane.normals, GL_STATIC_DRAW);
glGenBuffers(1, &g_texCoordsVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_texCoordsVBO);
glBufferData(GL_ARRAY_BUFFER, plane.numberVertices * 2 * sizeof(GLfloat), (GLfloat*) plane.texCoords, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glGenBuffers(1, &g_indicesVBO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesVBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, plane.numberIndices * sizeof(GLuint), (GLuint*) plane.indices, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glusDestroyShapef(&plane);
//
glUseProgram(g_program.program);
glGenVertexArrays(1, &g_vao);
glBindVertexArray(g_vao);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
glVertexAttribPointer(g_vertexLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_vertexLocation);
glBindBuffer(GL_ARRAY_BUFFER, g_normalsVBO);
glVertexAttribPointer(g_normalLocation, 3, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_normalLocation);
glBindBuffer(GL_ARRAY_BUFFER, g_texCoordsVBO);
glVertexAttribPointer(g_texCoordLocation, 2, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_texCoordLocation);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesVBO);
//
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, g_texture);
glUniform1i(g_textureLocation, 0);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, g_mirrorTexture);
glUniform1i(g_mirrorTextureLocation, 1);
// How many times the surface texture is repeated.
glUniform1f(g_repeatLocation, 6.0f);
//
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClearDepthf(1.0f);
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
return GLUS_TRUE;
}
GLUSboolean init(GLUSvoid)
{
GLUStextfile vertexSource;
GLUStextfile fragmentSource;
GLUStgaimage image;
GLUSgroupList* groupWalker;
GLUSmaterialList* materialWalker;
GLUSshape sphere;
//
// Each point light is rendered as a sphere.
//
glusLoadTextFile("../Example31/shader/point_light.vert.glsl", &vertexSource);
glusLoadTextFile("../Example31/shader/point_light.frag.glsl", &fragmentSource);
glusBuildProgramFromSource(&g_programPointLight, (const GLUSchar**)&vertexSource.text, 0, 0, 0, (const GLUSchar**)&fragmentSource.text);
glusDestroyTextFile(&vertexSource);
glusDestroyTextFile(&fragmentSource);
//
g_projectionMatrixPointLightLocation = glGetUniformLocation(g_programPointLight.program, "u_projectionMatrix");
g_viewMatrixPointLightLocation = glGetUniformLocation(g_programPointLight.program, "u_viewMatrix");
g_modelMatrixPointLightLocation = glGetUniformLocation(g_programPointLight.program, "u_modelMatrix");
g_positionMatrixPointLightLocation = glGetUniformLocation(g_programPointLight.program, "u_positionMatrix");
g_biasMatrixPointLightLocation = glGetUniformLocation(g_programPointLight.program, "u_biasMatrix");
g_radiusPointLightLocation = glGetUniformLocation(g_programPointLight.program, "u_lightRadius");
g_diffusePointLightLocation = glGetUniformLocation(g_programPointLight.program, "u_diffuse");
g_specularPointLightLocation = glGetUniformLocation(g_programPointLight.program, "u_specular");
g_positionPointLightLocation = glGetUniformLocation(g_programPointLight.program, "u_position");
g_normalPointLightLocation = glGetUniformLocation(g_programPointLight.program, "u_normal");
g_vertexPointLightLocation = glGetAttribLocation(g_programPointLight.program, "a_vertex");
// Use a helper function to create a cube.
glusCreateSpheref(&sphere, POINT_LIGHT_RADIUS, 32);
g_numberIndicesPointLight = sphere.numberIndices;
glGenBuffers(1, &g_verticesPointLightVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesPointLightVBO);
// Transfer the vertices from CPU to GPU.
glBufferData(GL_ARRAY_BUFFER, sphere.numberVertices * 4 * sizeof(GLfloat), (GLfloat*)sphere.vertices, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glGenBuffers(1, &g_indicesPointLightVBO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesPointLightVBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, sphere.numberIndices * sizeof(GLuint), (GLuint*)sphere.indices, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glusDestroyShapef(&sphere);
glGenVertexArrays(1, &g_vaoPointLight);
glBindVertexArray(g_vaoPointLight);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesPointLightVBO);
glVertexAttribPointer(g_vertexPointLightLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_vertexPointLightLocation);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesPointLightVBO);
glBindVertexArray(0);
//
// The point lights are moving forth and back between the columns and rows.
// Here, a random position and moving direction of the point light is generated.
//
glusRandomSetSeed(13);
// Note: If more than 16 lights are used, make sure to store them in another matrix or buffer.
for (GLint i = 0; i < POINT_LIGHT_COUNT; i++)
{
g_positionMatrix[i] = glusRandomUniformGetFloatf(0.0f, (float)POINT_LIGHT_COUNT - 2.0f);
g_directionMatrix[i] = rand() % 2 == 0 ? 1.0f : -1.0f;
}
//
//
//
glusLoadTextFile("../Example31/shader/deferred_shading.vert.glsl", &vertexSource);
glusLoadTextFile("../Example31/shader/deferred_shading.frag.glsl", &fragmentSource);
glusBuildProgramFromSource(&g_programDeferredShading, (const GLUSchar**)&vertexSource.text, 0, 0, 0, (const GLUSchar**)&fragmentSource.text);
glusDestroyTextFile(&vertexSource);
glusDestroyTextFile(&fragmentSource);
//
g_projectionMatrixLocation = glGetUniformLocation(g_programDeferredShading.program, "u_projectionMatrix");
g_viewMatrixLocation = glGetUniformLocation(g_programDeferredShading.program, "u_viewMatrix");
g_modelMatrixLocation = glGetUniformLocation(g_programDeferredShading.program, "u_modelMatrix");
g_normalMatrixLocation = glGetUniformLocation(g_programDeferredShading.program, "u_normalMatrix");
g_material.diffuseColorLocation = glGetUniformLocation(g_programDeferredShading.program, "u_material.diffuseColor");
g_material.specularColorLocation = glGetUniformLocation(g_programDeferredShading.program, "u_material.specularColor");
g_material.specularExponentLocation = glGetUniformLocation(g_programDeferredShading.program, "u_material.specularExponent");
g_material.diffuseTextureLocation = glGetUniformLocation(g_programDeferredShading.program, "u_material.diffuseTexture");
g_useTextureLocation = glGetUniformLocation(g_programDeferredShading.program, "u_useTexture");
g_vertexLocation = glGetAttribLocation(g_programDeferredShading.program, "a_vertex");
g_normalLocation = glGetAttribLocation(g_programDeferredShading.program, "a_normal");
g_texCoordLocation = glGetAttribLocation(g_programDeferredShading.program, "a_texCoord");
//
// Use a helper function to load the wavefront object file.
//
glusLoadGroupedObjFile("ChessPawn.obj", &g_wavefront);
glGenBuffers(1, &g_wavefront.verticesVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_wavefront.verticesVBO);
glBufferData(GL_ARRAY_BUFFER, g_wavefront.numberVertices * 4 * sizeof(GLfloat), (GLfloat*)g_wavefront.vertices, GL_STATIC_DRAW);
glGenBuffers(1, &g_wavefront.normalsVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_wavefront.normalsVBO);
glBufferData(GL_ARRAY_BUFFER, g_wavefront.numberVertices * 3 * sizeof(GLfloat), (GLfloat*)g_wavefront.normals, GL_STATIC_DRAW);
glGenBuffers(1, &g_wavefront.texCoordsVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_wavefront.texCoordsVBO);
glBufferData(GL_ARRAY_BUFFER, g_wavefront.numberVertices * 2 * sizeof(GLfloat), (GLfloat*)g_wavefront.texCoords, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
//
// Set up indices and the VAOs for each group
//
glUseProgram(g_programDeferredShading.program);
groupWalker = g_wavefront.groups;
while (groupWalker)
{
glGenBuffers(1, &groupWalker->group.indicesVBO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, groupWalker->group.indicesVBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, groupWalker->group.numberIndices * sizeof(GLuint), (GLuint*)groupWalker->group.indices, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
//
glGenVertexArrays(1, &groupWalker->group.vao);
glBindVertexArray(groupWalker->group.vao);
glBindBuffer(GL_ARRAY_BUFFER, g_wavefront.verticesVBO);
glVertexAttribPointer(g_vertexLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_vertexLocation);
glBindBuffer(GL_ARRAY_BUFFER, g_wavefront.normalsVBO);
glVertexAttribPointer(g_normalLocation, 3, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_normalLocation);
glBindBuffer(GL_ARRAY_BUFFER, g_wavefront.texCoordsVBO);
glVertexAttribPointer(g_texCoordLocation, 2, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_texCoordLocation);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, groupWalker->group.indicesVBO);
glBindVertexArray(0);
groupWalker = groupWalker->next;
}
//
// Load the textures, if there are available
//
materialWalker = g_wavefront.materials;
while (materialWalker)
{
if (materialWalker->material.diffuseTextureFilename[0] != '\0')
{
// Load the image.
glusLoadTgaImage(materialWalker->material.diffuseTextureFilename, &image);
// Generate and bind a texture.
glGenTextures(1, &materialWalker->material.diffuseTextureName);
glBindTexture(GL_TEXTURE_2D, materialWalker->material.diffuseTextureName);
// Transfer the image data from the CPU to the GPU.
glTexImage2D(GL_TEXTURE_2D, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
// Setting the texture parameters.
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glGenerateMipmap(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, 0);
}
materialWalker = materialWalker->next;
}
//
// Setting up the deferred shading geometry buffer.
//
glGenTextures(1, &g_dsDiffuseTexture);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, g_dsDiffuseTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, TEXTURE_WIDTH, TEXTURE_HEIGHT, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glBindTexture(GL_TEXTURE_2D, 0);
//
glGenTextures(1, &g_dsSpecularTexture);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, g_dsSpecularTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, TEXTURE_WIDTH, TEXTURE_HEIGHT, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glBindTexture(GL_TEXTURE_2D, 0);
//
glGenTextures(1, &g_dsPositionTexture);
glActiveTexture(GL_TEXTURE2);
glBindTexture(GL_TEXTURE_2D, g_dsPositionTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F, TEXTURE_WIDTH, TEXTURE_HEIGHT, 0, GL_RGBA, GL_FLOAT, 0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glBindTexture(GL_TEXTURE_2D, 0);
//
glGenTextures(1, &g_dsNormalTexture);
glActiveTexture(GL_TEXTURE3);
glBindTexture(GL_TEXTURE_2D, g_dsNormalTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB32F, TEXTURE_WIDTH, TEXTURE_HEIGHT, 0, GL_RGB, GL_FLOAT, 0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glBindTexture(GL_TEXTURE_2D, 0);
//
glGenTextures(1, &g_dsDepthTexture);
glActiveTexture(GL_TEXTURE4);
glBindTexture(GL_TEXTURE_2D, g_dsDepthTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT, TEXTURE_WIDTH, TEXTURE_HEIGHT, 0, GL_DEPTH_COMPONENT, GL_UNSIGNED_BYTE, 0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glBindTexture(GL_TEXTURE_2D, 0);
glActiveTexture(GL_TEXTURE0);
//
glGenFramebuffers(1, &g_dsFBO);
glBindFramebuffer(GL_FRAMEBUFFER, g_dsFBO);
// Attach the color buffer ...
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, g_dsDiffuseTexture, 0);
// Attach the normal buffer ...
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, GL_TEXTURE_2D, g_dsSpecularTexture, 0);
// Attach the color buffer ...
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT2, GL_TEXTURE_2D, g_dsPositionTexture, 0);
// Attach the normal buffer ...
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT3, GL_TEXTURE_2D, g_dsNormalTexture, 0);
// ... and the depth buffer,
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, g_dsDepthTexture, 0);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
{
printf("GL_FRAMEBUFFER_COMPLETE error 0x%x", glCheckFramebufferStatus(GL_FRAMEBUFFER));
return GLUS_FALSE;
}
glBindFramebuffer(GL_FRAMEBUFFER, 0);
//
//
//
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClearDepth(1.0f);
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
// The color buffer is accumulated for each light, so use this blend function when doing the lighting pass.
glBlendFunc(GL_ONE, GL_ONE);
return GLUS_TRUE;
}
GLUSboolean init(GLUSvoid)
{
GLfloat modelViewMatrix[16];
GLUSshape plane;
GLUSuint planeIndices[] = { 0, 1, 3, 2 };
GLUStextfile vertexSource;
GLUStextfile controlSource;
GLUStextfile evaluationSource;
GLUStextfile geometrySource;
GLUStextfile fragmentSource;
glusLoadTextFile("../Example13/shader/tessellation.vert.glsl", &vertexSource);
glusLoadTextFile("../Example13/shader/tessellation.cont.glsl", &controlSource);
glusLoadTextFile("../Example13/shader/tessellation.eval.glsl", &evaluationSource);
glusLoadTextFile("../Example13/shader/tessellation.geom.glsl", &geometrySource);
glusLoadTextFile("../Example13/shader/tessellation.frag.glsl", &fragmentSource);
glusBuildProgramFromSource(&g_program, (const GLUSchar**) &vertexSource.text, (const GLUSchar**) &controlSource.text, (const GLUSchar**) &evaluationSource.text, (const GLUSchar**) &geometrySource.text, (const GLUSchar**) &fragmentSource.text);
glusDestroyTextFile(&vertexSource);
glusDestroyTextFile(&controlSource);
glusDestroyTextFile(&evaluationSource);
glusDestroyTextFile(&geometrySource);
glusDestroyTextFile(&fragmentSource);
//
g_projectionMatrixLocation = glGetUniformLocation(g_program.program, "u_projectionMatrix");
g_modelViewMatrixLocation = glGetUniformLocation(g_program.program, "u_modelViewMatrix");
g_vertexLocation = glGetAttribLocation(g_program.program, "a_vertex");
//
glusCreatePlanef(&plane, 1.0f);
glGenBuffers(1, &g_verticesVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
glBufferData(GL_ARRAY_BUFFER, plane.numberVertices * 4 * sizeof(GLfloat), (GLfloat*) plane.vertices, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glGenBuffers(1, &g_indicesVBO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesVBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, g_numberIndicesSphere * sizeof(GLuint), (GLuint*) planeIndices, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glusDestroyShapef(&plane);
//
glUseProgram(g_program.program);
// Calculate the view matrix ...
glusLookAtf(modelViewMatrix, 0.0f, 0.0f, 5.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f);
glUniformMatrix4fv(g_modelViewMatrixLocation, 1, GL_FALSE, modelViewMatrix);
glGenVertexArrays(1, &g_vao);
glBindVertexArray(g_vao);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
glVertexAttribPointer(g_vertexLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_vertexLocation);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesVBO);
//
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glEnable( GL_CULL_FACE);
// We work with 4 points per patch.
glPatchParameteri(GL_PATCH_VERTICES, 4);
return GLUS_TRUE;
}
GLUSboolean init(GLUSvoid)
{
GLUSshape backgroundSphere;
GLUSshape wavefront;
// 6 sides of diffuse and specular; all roughness levels of specular.
GLUShdrimage image[6 * NUMBER_ROUGHNESS + 6];
// The look up table (LUT) is stored in a raw binary file.
GLUSbinaryfile rawimage;
GLUStextfile vertexSource;
GLUStextfile fragmentSource;
GLchar buffer[27] = "doge2/doge2_POS_X_00_s.hdr";
GLint i, k, m;
//
glusLoadTextFile("../Example33/shader/brdf.vert.glsl", &vertexSource);
glusLoadTextFile("../Example33/shader/brdf.frag.glsl", &fragmentSource);
glusBuildProgramFromSource(&g_modelProgram, (const GLchar**)&vertexSource.text, 0, 0, 0, (const GLchar**)&fragmentSource.text);
glusDestroyTextFile(&vertexSource);
glusDestroyTextFile(&fragmentSource);
g_viewProjectionMatrixModelLocation = glGetUniformLocation(g_modelProgram.program, "u_viewProjectionMatrix");
g_modelMatrixModelLocation = glGetUniformLocation(g_modelProgram.program, "u_modelMatrix");
g_normalMatrixModelLocation = glGetUniformLocation(g_modelProgram.program, "u_normalMatrix");
g_eyeModelLocation = glGetUniformLocation(g_modelProgram.program, "u_eye");
g_textureSpecularModelLocation = glGetUniformLocation(g_modelProgram.program, "u_textureSpecular");
g_textureDiffuseModelLocation = glGetUniformLocation(g_modelProgram.program, "u_textureDiffuse");
g_textureLUTModelLocation = glGetUniformLocation(g_modelProgram.program, "u_textureLUT");
g_colorMaterialModelLocation = glGetUniformLocation(g_modelProgram.program, "u_colorMaterial");
g_roughnessMaterialModelLocation = glGetUniformLocation(g_modelProgram.program, "u_roughnessMaterial");
g_roughnessScaleModelLocation = glGetUniformLocation(g_modelProgram.program, "u_roughnessScale");
g_R0MaterialModelLocation = glGetUniformLocation(g_modelProgram.program, "u_R0Material");
g_vertexModelLocation = glGetAttribLocation(g_modelProgram.program, "a_vertex");
g_normalModelLocation = glGetAttribLocation(g_modelProgram.program, "a_normal");
//
glusLoadTextFile("../Example33/shader/fullscreen.vert.glsl", &vertexSource);
glusLoadTextFile("../Example33/shader/fullscreen.frag.glsl", &fragmentSource);
glusBuildProgramFromSource(&g_fullscreenProgram, (const GLchar**)&vertexSource.text, 0, 0, 0, (const GLchar**)&fragmentSource.text);
glusDestroyTextFile(&vertexSource);
glusDestroyTextFile(&fragmentSource);
//
g_framebufferTextureFullscreenLocation = glGetUniformLocation(g_fullscreenProgram.program, "u_framebufferTexture");
g_msaaSamplesFullscreenLocation = glGetUniformLocation(g_fullscreenProgram.program, "u_msaaSamples");
g_exposureFullscreenLocation = glGetUniformLocation(g_fullscreenProgram.program, "u_exposure");
g_gammaFullscreenLocation = glGetUniformLocation(g_fullscreenProgram.program, "u_gamma");
//
//
glusLoadTextFile("../Example33/shader/background.vert.glsl", &vertexSource);
glusLoadTextFile("../Example33/shader/background.frag.glsl", &fragmentSource);
glusBuildProgramFromSource(&g_backgroundProgram, (const GLUSchar**)&vertexSource.text, 0, 0, 0, (const GLUSchar**)&fragmentSource.text);
glusDestroyTextFile(&vertexSource);
glusDestroyTextFile(&fragmentSource);
//
g_viewProjectionMatrixBackgroundLocation = glGetUniformLocation(g_backgroundProgram.program, "u_viewProjectionMatrix");
g_textureBackgroundLocation = glGetUniformLocation(g_backgroundProgram.program, "u_texture");
g_vertexBackgroundLocation = glGetAttribLocation(g_backgroundProgram.program, "a_vertex");
//
// Setting up the full screen frame buffer.
//
glGenTextures(1, &g_fullscreenTexture);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, g_fullscreenTexture);
// Create MSAA texture.
glTexImage2DMultisample(GL_TEXTURE_2D_MULTISAMPLE, MSAA_SAMPLES, GL_RGB32F, SCREEN_WIDTH, SCREEN_HEIGHT, GL_TRUE);
glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, 0);
// No need to access the depth buffer, so a render buffer is sufficient.
glGenRenderbuffers(1, &g_fullscreenDepthRenderbuffer);
glBindRenderbuffer(GL_RENDERBUFFER, g_fullscreenDepthRenderbuffer);
glRenderbufferStorageMultisample(GL_RENDERBUFFER, MSAA_SAMPLES, GL_DEPTH_COMPONENT, SCREEN_WIDTH, SCREEN_HEIGHT);
glBindRenderbuffer(GL_RENDERBUFFER, 0);
//
glGenFramebuffers(1, &g_fullscreenFBO);
glBindFramebuffer(GL_FRAMEBUFFER, g_fullscreenFBO);
// Attach the color buffer ...
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D_MULTISAMPLE, g_fullscreenTexture, 0);
// ... and the depth buffer.
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, g_fullscreenDepthRenderbuffer);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
{
printf("GL_FRAMEBUFFER_COMPLETE error 0x%x", glCheckFramebufferStatus(GL_FRAMEBUFFER));
return GLUS_FALSE;
}
glBindFramebuffer(GL_FRAMEBUFFER, 0);
//
//
//
for (i = 0; i < 2; i++)
{
if (i == 0)
{
buffer[21] = 's';
}
else
{
buffer[21] = 'd';
}
for (k = 0; k < NUMBER_ROUGHNESS; k++)
{
if (i == 1 && k > 0)
{
continue;
}
buffer[18] = '0' + k / 10;
buffer[19] = '0' + k % 10;
for (m = 0; m < 6; m++)
{
if (m % 2 == 0)
{
buffer[12] = 'P';
buffer[13] = 'O';
buffer[14] = 'S';
}
else
{
buffer[12] = 'N';
buffer[13] = 'E';
buffer[14] = 'G';
}
switch (m)
{
case 0:
case 1:
buffer[16] = 'X';
break;
case 2:
case 3:
buffer[16] = 'Y';
break;
case 4:
case 5:
buffer[16] = 'Z';
break;
}
printf("Loading '%s' ...", buffer);
if (!glusLoadHdrImage(buffer, &image[i*NUMBER_ROUGHNESS*6 + k*6 + m]))
{
printf(" error!\n");
continue;
}
printf(" done.\n");
}
}
}
glGenTextures(1, &g_texture[0]);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_CUBE_MAP_ARRAY, g_texture[0]);
glTexImage3D(GL_TEXTURE_CUBE_MAP_ARRAY, 0, GL_RGB32F, image[0].width, image[0].height, 6*NUMBER_ROUGHNESS, 0, GL_RGB, GL_FLOAT, 0);
glusLogPrintError(GLUS_LOG_INFO, "glTexImage3D()");
for (i = 0; i < NUMBER_ROUGHNESS; i++)
{
for (k = 0; k < 6; k++)
{
glTexSubImage3D(GL_TEXTURE_CUBE_MAP_ARRAY, 0, 0, 0, 6*i + k, image[i*6 + k].width, image[i*6 + k].height, 1, image[i*6 + k].format, GL_FLOAT, image[i*6 + k].data);
glusLogPrintError(GLUS_LOG_INFO, "glTexSubImage3D() %d %d", i, k);
}
}
glTexParameteri(GL_TEXTURE_CUBE_MAP_ARRAY, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_CUBE_MAP_ARRAY, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_CUBE_MAP_ARRAY, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_CUBE_MAP_ARRAY, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glBindTexture(GL_TEXTURE_CUBE_MAP_ARRAY, 0);
//
glGenTextures(1, &g_texture[1]);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_CUBE_MAP, g_texture[1]);
for (i = 0; i < 6; i++)
{
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, image[i + 6*NUMBER_ROUGHNESS].format, image[i + 6*NUMBER_ROUGHNESS].width, image[i + 6*NUMBER_ROUGHNESS].height, 0, image[i + 6*NUMBER_ROUGHNESS].format, GL_FLOAT, image[i + 6*NUMBER_ROUGHNESS].data);
glusLogPrintError(GLUS_LOG_INFO, "glTexImage2D() %d", i);
}
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
//
printf("Loading 'doge2/EnvironmentBRDF_1024.data' ...");
if (!glusLoadBinaryFile("doge2/EnvironmentBRDF_1024.data", &rawimage))
{
printf(" error!\n");
}
else
{
printf(" done.\n");
}
glGenTextures(1, &g_texture[2]);
glActiveTexture(GL_TEXTURE2);
glBindTexture(GL_TEXTURE_2D, g_texture[2]);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RG32F, 1024, 1024, 0, GL_RG, GL_FLOAT, (GLfloat*)rawimage.binary);
glusLogPrintError(GLUS_LOG_INFO, "glTexImage2D()");
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glBindTexture(GL_TEXTURE_2D, 0);
glusDestroyBinaryFile(&rawimage);
//
for (i = 0; i < 2; i++)
{
for (k = 0; k < NUMBER_ROUGHNESS; k++)
{
if (i == 1 && k > 0)
{
continue;
}
for (m = 0; m < 6; m++)
{
glusDestroyHdrImage(&image[i*NUMBER_ROUGHNESS*6 + k*6 + m]);
}
}
}
//
glusCreateSpheref(&backgroundSphere, 500.0f, 32);
g_numberIndicesBackground = backgroundSphere.numberIndices;
glGenBuffers(1, &g_verticesBackgroundVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesBackgroundVBO);
glBufferData(GL_ARRAY_BUFFER, backgroundSphere.numberVertices * 4 * sizeof(GLfloat), (GLfloat*)backgroundSphere.vertices, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glGenBuffers(1, &g_indicesBackgroundVBO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesBackgroundVBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, backgroundSphere.numberIndices * sizeof(GLuint), (GLuint*)backgroundSphere.indices, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glusDestroyShapef(&backgroundSphere);
//
//
// Use a helper function to load an wavefront object file.
glusLoadObjFile("venusm.obj", &wavefront);
g_numberVerticesModel = wavefront.numberVertices;
glGenBuffers(1, &g_verticesModelVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesModelVBO);
glBufferData(GL_ARRAY_BUFFER, wavefront.numberVertices * 4 * sizeof(GLfloat), (GLfloat*)wavefront.vertices, GL_STATIC_DRAW);
glGenBuffers(1, &g_normalsModelVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_normalsModelVBO);
glBufferData(GL_ARRAY_BUFFER, wavefront.numberVertices * 3 * sizeof(GLfloat), (GLfloat*)wavefront.normals, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glusDestroyShapef(&wavefront);
//
glUseProgram(g_modelProgram.program);
glUniform4fv(g_eyeModelLocation, 1, g_eye);
glUniform1i(g_textureSpecularModelLocation, 0);
glUniform1i(g_textureDiffuseModelLocation, 1);
glUniform1i(g_textureLUTModelLocation, 2);
glUniform1f(g_roughnessScaleModelLocation, (GLfloat)(NUMBER_ROUGHNESS - 1));
glGenVertexArrays(1, &g_modelVAO);
glBindVertexArray(g_modelVAO);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesModelVBO);
glVertexAttribPointer(g_vertexModelLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_vertexModelLocation);
glBindBuffer(GL_ARRAY_BUFFER, g_normalsModelVBO);
glVertexAttribPointer(g_normalModelLocation, 3, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_normalModelLocation);
//
glUseProgram(g_fullscreenProgram.program);
glUniform1i(g_framebufferTextureFullscreenLocation, 0);
glUniform1i(g_msaaSamplesFullscreenLocation, MSAA_SAMPLES);
glGenVertexArrays(1, &g_fullscreenVAO);
glBindVertexArray(g_fullscreenVAO);
//
glUseProgram(g_backgroundProgram.program);
glUniform1i(g_textureBackgroundLocation, 0);
glGenVertexArrays(1, &g_backgroundVAO);
glBindVertexArray(g_backgroundVAO);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesBackgroundVBO);
glVertexAttribPointer(g_vertexBackgroundLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_vertexBackgroundLocation);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesBackgroundVBO);
//
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClearDepth(1.0f);
glEnable(GL_CULL_FACE);
return GLUS_TRUE;
}
