GLUSboolean init(GLUSvoid)
{
GLUSshape torus;
GLUSshape backgroundSphere;
GLUStgaimage image;
GLUStextfile vertexSource;
GLUStextfile fragmentSource;
glusFileLoadText("../Example11/shader/glass.vert.glsl", &vertexSource);
glusFileLoadText("../Example11/shader/glass.frag.glsl", &fragmentSource);
glusProgramBuildFromSource(&g_program, (const GLUSchar**) &vertexSource.text, 0, 0, 0, (const GLUSchar**) &fragmentSource.text);
glusFileDestroyText(&vertexSource);
glusFileDestroyText(&fragmentSource);
//
glusFileLoadText("../Example11/shader/background.vert.glsl", &vertexSource);
glusFileLoadText("../Example11/shader/background.frag.glsl", &fragmentSource);
glusProgramBuildFromSource(&g_programBackground, (const GLUSchar**) &vertexSource.text, 0, 0, 0, (const GLUSchar**) &fragmentSource.text);
glusFileDestroyText(&vertexSource);
glusFileDestroyText(&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);
glusImageLoadTga("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);
glusImageDestroyTga(&image);
glusImageLoadTga("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);
glusImageDestroyTga(&image);
glusImageLoadTga("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);
glusImageDestroyTga(&image);
glusImageLoadTga("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);
glusImageDestroyTga(&image);
glusImageLoadTga("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);
glusImageDestroyTga(&image);
glusImageLoadTga("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);
glusImageDestroyTga(&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);
//
glusShapeCreateTorusf(&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);
glusShapeDestroyf(&torus);
//
glusShapeCreateSpheref(&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);
glusShapeDestroyf(&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);
glClearDepth(1.0f);
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
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 } };
// Green color material with white specular color, half transparent.
struct MaterialProperties material = { { 0.0f, 1.0f, 0.0f, 1.0f }, { 0.0f, 1.0f, 0.0f, 1.0f }, { 1.0f, 1.0f, 1.0f, 1.0f }, 20.0f, 0.5f };
// Buffer for cleaning the head index testure.
static GLuint clearBuffer[SCREEN_WIDTH * SCREEN_HEIGHT];
GLUStextfile vertexSource;
GLUStextfile fragmentSource;
GLUSshape wavefrontObj;
GLuint i;
for (i = 0; i < SCREEN_WIDTH * SCREEN_HEIGHT; i++)
{
// 0xffffffff means end of list, so for the start tehre is no entry.
clearBuffer[i] = 0xffffffff;
}
//
glusFileLoadText("../Example36/shader/phong_linked_list.vert.glsl", &vertexSource);
glusFileLoadText("../Example36/shader/phong_linked_list.frag.glsl", &fragmentSource);
glusProgramBuildFromSource(&g_program, (const GLUSchar**) &vertexSource.text, 0, 0, 0, (const GLUSchar**) &fragmentSource.text);
glusFileDestroyText(&vertexSource);
glusFileDestroyText(&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_material.alphaLocation = glGetUniformLocation(g_program.program, "u_material.alpha");
g_maxNodesLocation = glGetUniformLocation(g_program.program, "u_maxNodes");
g_vertexLocation = glGetAttribLocation(g_program.program, "a_vertex");
g_normalLocation = glGetAttribLocation(g_program.program, "a_normal");
//
glusFileLoadText("../Example36/shader/fullscreen_blend.vert.glsl", &vertexSource);
glusFileLoadText("../Example36/shader/fullscreen_blend.frag.glsl", &fragmentSource);
glusProgramBuildFromSource(&g_blendFullscreenProgram, (const GLchar**)&vertexSource.text, 0, 0, 0, (const GLchar**)&fragmentSource.text);
glusFileDestroyText(&vertexSource);
glusFileDestroyText(&fragmentSource);
// Atomic counter to gather a free node slot concurrently.
glGenBuffers(1, &g_freeNodeIndex);
glBindBufferBase(GL_ATOMIC_COUNTER_BUFFER, BINDING_ATOMIC_FREE_INDEX, g_freeNodeIndex);
glBufferData(GL_ATOMIC_COUNTER_BUFFER, sizeof(GLuint), 0, GL_DYNAMIC_DRAW);
// Head index texture/image, which contains the
glGenTextures(1, &g_headIndexTexture);
glBindTexture(GL_TEXTURE_2D, g_headIndexTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_R32UI, SCREEN_WIDTH, SCREEN_HEIGHT, 0, GL_RED_INTEGER, GL_UNSIGNED_INT, 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);
glBindTexture(GL_TEXTURE_2D, 0);
glBindImageTexture(BINDING_IMAGE_HEAD_INDEX, g_headIndexTexture, 0, GL_FALSE, 0, GL_READ_WRITE, GL_R32UI);
// Buffer to clear/reset the head pointers.
glGenBuffers(1, &g_clearBuffer);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, g_clearBuffer);
glBufferData(GL_PIXEL_UNPACK_BUFFER, SCREEN_WIDTH * SCREEN_HEIGHT * sizeof(GLuint), clearBuffer, GL_STATIC_COPY);
// Buffer for the linked list.
glGenBuffers(1, &g_linkedListBuffer);
glBindBufferBase(GL_SHADER_STORAGE_BUFFER, BINDING_BUFFER_LINKED_LIST, g_linkedListBuffer);
// Size is RGBA, depth (5 * GLfloat), next pointer (1 * GLuint) and 2 paddings (2 * GLfloat).
glBufferData(GL_SHADER_STORAGE_BUFFER, MAX_NODES * (sizeof(GLfloat) * 5 + sizeof(GLuint) * 1) + sizeof(GLfloat) * 2, 0, GL_DYNAMIC_DRAW);
//
// Use a helper function to load an wavefront object file.
glusShapeLoadWavefront("dragon.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);
glusShapeDestroyf(&wavefrontObj);
//
glUseProgram(g_blendFullscreenProgram.program);
glGenVertexArrays(1, &g_blendFullscreenVAO);
glBindVertexArray(g_blendFullscreenVAO);
glBindVertexArray(0);
//
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);
glBindVertexArray(0);
//
glusMatrix4x4LookAtf(g_viewMatrix, 0.0f, 0.0f, 3.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f);
//
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);
glUniform1f(g_material.alphaLocation, material.alpha);
glUniform1ui(g_maxNodesLocation, MAX_NODES);
//
glDisable(GL_DEPTH_TEST);
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 } };
// Green color material with white specular color, half transparent.
struct MaterialProperties material = { { 0.0f, 1.0f, 0.0f, 1.0f }, { 0.0f, 1.0f, 0.0f, 1.0f }, { 1.0f, 1.0f, 1.0f, 1.0f }, 20.0f, 0.5f };
static GLfloat biasMatrix[] = { 0.5f, 0.0f, 0.0f, 0.0f, 0.0f, 0.5f, 0.0f, 0.0f, 0.0f, 0.0f, 0.5f, 0.0f, 0.5f, 0.5f, 0.5f, 1.0f };
GLUStextfile vertexSource;
GLUStextfile fragmentSource;
GLUSshape wavefrontObj;
glusFileLoadText("shader/phong_depth_peel.vert.glsl", &vertexSource);
glusFileLoadText("shader/phong_depth_peel.frag.glsl", &fragmentSource);
glusProgramBuildFromSource(&g_program, (const GLUSchar**) &vertexSource.text, 0, 0, 0, (const GLUSchar**) &fragmentSource.text);
glusFileDestroyText(&vertexSource);
glusFileDestroyText(&fragmentSource);
//
g_biasMatrixLocation = glGetUniformLocation(g_program.program, "u_biasMatrix");
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_material.alphaLocation = glGetUniformLocation(g_program.program, "u_material.alpha");
g_peelTextureLocation = glGetUniformLocation(g_program.program, "u_peelTexture");
g_layerLocation = glGetUniformLocation(g_program.program, "u_layer");
g_vertexLocation = glGetAttribLocation(g_program.program, "a_vertex");
g_normalLocation = glGetAttribLocation(g_program.program, "a_normal");
//
glusFileLoadText("shader/fullscreen_blend.vert.glsl", &vertexSource);
glusFileLoadText("shader/fullscreen_blend.frag.glsl", &fragmentSource);
glusProgramBuildFromSource(&g_blendFullscreenProgram, (const GLchar**)&vertexSource.text, 0, 0, 0, (const GLchar**)&fragmentSource.text);
glusFileDestroyText(&vertexSource);
glusFileDestroyText(&fragmentSource);
//
g_framebufferTextureBlendFullscreenLocation = glGetUniformLocation(g_blendFullscreenProgram.program, "u_framebufferTexture");
g_layersBlendFullscreenLocation = glGetUniformLocation(g_blendFullscreenProgram.program, "u_layers");
//
// Use a helper function to load an wavefront object file.
glusShapeLoadWavefront("../../media/dragon.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);
glusShapeDestroyf(&wavefrontObj);
//
//
// Setting up the frame buffer.
//
glGenTextures(1, &g_colorTexture);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D_ARRAY, g_colorTexture);
glTexImage3D(GL_TEXTURE_2D_ARRAY, 0, GL_RGBA, SCREEN_WIDTH, SCREEN_HEIGHT, LAYERS, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0);
glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameterf(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameterf(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glBindTexture(GL_TEXTURE_2D_ARRAY, 0);
//
glGenTextures(2, g_depthTexture);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, g_depthTexture[0]);
glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT32F, SCREEN_WIDTH, SCREEN_HEIGHT, 0, GL_DEPTH_COMPONENT, GL_FLOAT, 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);
// Peel depth test "function". See shader for more information.
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_FUNC, GL_GREATER);
glBindTexture(GL_TEXTURE_2D, g_depthTexture[1]);
glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT32F, SCREEN_WIDTH, SCREEN_HEIGHT, 0, GL_DEPTH_COMPONENT, GL_FLOAT, 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);
// Peel depth test "function". See shader for more information.
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_FUNC, GL_GREATER);
glBindTexture(GL_TEXTURE_2D, 0);
//
glGenFramebuffers(1, &g_blendFullscreenFBO);
glBindFramebuffer(GL_FRAMEBUFFER, g_blendFullscreenFBO);
// Attach the color buffer ...
glFramebufferTextureLayer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, g_colorTexture, 0, 0);
// ... and the depth buffer,
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, g_depthTexture[1], 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);
//
glUseProgram(g_blendFullscreenProgram.program);
glGenVertexArrays(1, &g_blendFullscreenVAO);
glBindVertexArray(g_blendFullscreenVAO);
glUniform1i(g_framebufferTextureBlendFullscreenLocation, 0);
glUniform1i(g_layersBlendFullscreenLocation, LAYERS);
glBindVertexArray(0);
//
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);
glBindVertexArray(0);
//
glusMatrix4x4LookAtf(g_viewMatrix, 0.0f, 0.0f, 3.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f);
//
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);
glUniform1f(g_material.alphaLocation, material.alpha);
glUniform1i(g_peelTextureLocation, 1);
glUniformMatrix4fv(g_biasMatrixLocation, 1, GL_FALSE, biasMatrix);
//
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClearDepth(1.0f);
glEnable(GL_DEPTH_TEST);
return GLUS_TRUE;
}
GLUSboolean init(GLUSvoid)
{
GLUSshape background;
GLUSshape torus;
GLUStextfile vertexSource;
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);
//
glusFileLoadText("shader/shadow.vert.glsl", &vertexSource);
glusFileLoadText("shader/shadow.frag.glsl", &fragmentSource);
glusProgramBuildFromSource(&g_programShadow, (const GLUSchar**) &vertexSource.text, 0, 0, 0, (const GLUSchar**) &fragmentSource.text);
glusFileDestroyText(&vertexSource);
glusFileDestroyText(&fragmentSource);
//
glusFileLoadText("shader/color.vert.glsl", &vertexSource);
glusFileLoadText("shader/color.frag.glsl", &fragmentSource);
glusProgramBuildFromSource(&g_program, (const GLUSchar**) &vertexSource.text, 0, 0, 0, (const GLUSchar**) &fragmentSource.text);
glusFileDestroyText(&vertexSource);
glusFileDestroyText(&fragmentSource);
//
g_projectionMatrixShadowLocation = glGetUniformLocation(g_programShadow.program, "u_projectionMatrix");
g_viewMatrixShadowLocation = glGetUniformLocation(g_programShadow.program, "u_viewMatrix");
g_shadowProjectionMatrixShadowLocation = glGetUniformLocation(g_programShadow.program, "u_shadowProjectionMatrix");
g_modelMatrixShadowLocation = glGetUniformLocation(g_programShadow.program, "u_modelMatrix");
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_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");
//
glusShapeCreateTorusf(&torus, 0.5f, 1.0f, 32, 32);
g_numberIndicesTorus = 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);
glusShapeDestroyf(&torus);
//
glusShapeCreatePlanef(&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);
glusShapeDestroyf(&background);
//
glUseProgram(g_program.program);
glusMatrix4x4LookAtf(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);
// 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);
//
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)
{
// 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 } };
GLUStextfile vertexSource;
GLUStextfile geometrySource;
GLUStextfile fragmentSource;
GLUStgaimage image;
GLUSshape bunnyShape;
//
glusFileLoadText("../Example26/shader/ambient_diffuse_texture.vert.glsl", &vertexSource);
glusFileLoadText("../Example26/shader/ambient_diffuse_texture.frag.glsl", &fragmentSource);
glusProgramBuildFromSource(&g_program, (const GLUSchar**) &vertexSource.text, 0, 0, 0, (const GLUSchar**) &fragmentSource.text);
glusFileDestroyText(&vertexSource);
glusFileDestroyText(&fragmentSource);
glusFileLoadText("../Example26/shader/fur.vert.glsl", &vertexSource);
glusFileLoadText("../Example26/shader/fur.geom.glsl", &geometrySource);
glusFileLoadText("../Example26/shader/fur.frag.glsl", &fragmentSource);
glusProgramBuildFromSource(&g_programFur, (const GLUSchar**) &vertexSource.text, 0, 0, (const GLUSchar**) &geometrySource.text, (const GLUSchar**) &fragmentSource.text);
glusFileDestroyText(&vertexSource);
glusFileDestroyText(&geometrySource);
glusFileDestroyText(&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_textureLocation = glGetUniformLocation(g_program.program, "u_textureFurColor");
g_vertexLocation = glGetAttribLocation(g_program.program, "a_vertex");
g_normalLocation = glGetAttribLocation(g_program.program, "a_normal");
g_texCoordLocation = glGetAttribLocation(g_program.program, "a_texCoord");
g_projectionMatrixFurLocation = glGetUniformLocation(g_programFur.program, "u_projectionMatrix");
g_modelViewMatrixFurLocation = glGetUniformLocation(g_programFur.program, "u_modelViewMatrix");
g_normalMatrixFurLocation = glGetUniformLocation(g_programFur.program, "u_normalMatrix");
g_lightDirectionFurLocation = glGetUniformLocation(g_programFur.program, "u_lightDirection");
g_textureFurColorLocation = glGetUniformLocation(g_programFur.program, "u_textureFurColor");
g_textureFurStrengthLocation = glGetUniformLocation(g_programFur.program, "u_textureFurStrength");
g_vertexFurLocation = glGetAttribLocation(g_programFur.program, "a_vertex");
g_normalFurLocation = glGetAttribLocation(g_programFur.program, "a_normal");
g_texCoordFurLocation = glGetAttribLocation(g_programFur.program, "a_texCoord");
//
// Color texture set up.
glusImageLoadTga("tiger.tga", &image);
glGenTextures(1, &g_textureFurColor);
glBindTexture(GL_TEXTURE_2D, g_textureFurColor);
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);
glusImageDestroyTga(&image);
// A simple noise texture influences the strength of each fur pixel.
glusPerlinCreateNoise2D(&image, 64, 64, 0, 100.0f, 255.0f, 0.5f, 1);
glGenTextures(1, &g_textureFurStrength);
glBindTexture(GL_TEXTURE_2D, g_textureFurStrength);
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);
glusImageDestroyTga(&image);
//
// Use a helper function to load an wavefront object file.
glusShapeLoadWavefront("bunny.obj", &bunnyShape);
// This model does not have any texture coordinates, so generate them.
glusShapeTexGenByAxesf(&bunnyShape, 2.0f, 0.0f, 2.0f, 0.0f, 0.0f, 0.0f);
g_numberVertices = bunnyShape.numberVertices;
glGenBuffers(1, &g_verticesVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
glBufferData(GL_ARRAY_BUFFER, bunnyShape.numberVertices * 4 * sizeof(GLfloat), (GLfloat*) bunnyShape.vertices, GL_STATIC_DRAW);
glGenBuffers(1, &g_normalsVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_normalsVBO);
glBufferData(GL_ARRAY_BUFFER, bunnyShape.numberVertices * 3 * sizeof(GLfloat), (GLfloat*) bunnyShape.normals, GL_STATIC_DRAW);
glGenBuffers(1, &g_texCoordsVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_texCoordsVBO);
glBufferData(GL_ARRAY_BUFFER, bunnyShape.numberVertices * 2 * sizeof(GLfloat), (GLfloat*) bunnyShape.texCoords, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glusShapeDestroyf(&bunnyShape);
//
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);
glUseProgram(g_programFur.program);
glGenVertexArrays(1, &g_vaoFur);
glBindVertexArray(g_vaoFur);
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);
//
glusMatrix4x4LookAtf(g_viewMatrix, 0.0f, 0.75f, 3.0f, 0.0f, 0.75f, 0.0f, 0.0f, 1.0f, 0.0f);
//
glusVector3Normalizef(light.direction);
// Transform light to camera space, as it is currently in world space.
glusMatrix4x4MultiplyVector3f(light.direction, g_viewMatrix, light.direction);
glUseProgram(g_program.program);
// 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 the texture.
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, g_textureFurColor);
glUniform1i(g_textureLocation, 0);
glUseProgram(g_programFur.program);
glUniform3fv(g_lightDirectionFurLocation, 1, light.direction);
// Fur color and position textures.
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, g_textureFurColor);
glUniform1i(g_textureFurColorLocation, 0);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, g_textureFurStrength);
glUniform1i(g_textureFurStrengthLocation, 1);
//
glClearColor(0.8f, 0.8f, 0.8f, 0.0f);
glClearDepth(1.0f);
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
return GLUS_TRUE;
}
GLUSboolean init(GLUSvoid)
{
GLUSshape sphere;
GLUStextfile vertexSource;
GLUStextfile geometrySource;
GLUStextfile fragmentSource;
glusFileLoadText("../Example10/shader/dublicate.vert.glsl", &vertexSource);
glusFileLoadText("../Example10/shader/dublicate.geom.glsl", &geometrySource);
glusFileLoadText("../Example10/shader/dublicate.frag.glsl", &fragmentSource);
glusProgramBuildFromSource(&g_program, (const GLUSchar**) &vertexSource.text, 0, 0, (const GLUSchar**) &geometrySource.text, (const GLUSchar**) &fragmentSource.text);
glusFileDestroyText(&vertexSource);
glusFileDestroyText(&geometrySource);
glusFileDestroyText(&fragmentSource);
//
g_projectionMatrixLocation = glGetUniformLocation(g_program.program, "u_projectionMatrix");
g_viewMatrixLocation = glGetUniformLocation(g_program.program, "u_viewMatrix");
g_normalMatrixLocation = glGetUniformLocation(g_program.program, "u_normalMatrix");
g_lightPositionLocation = glGetUniformLocation(g_program.program, "u_lightPosition");
g_vertexLocation = glGetAttribLocation(g_program.program, "a_vertex");
g_normalLocation = glGetAttribLocation(g_program.program, "a_normal");
//
glusShapeCreateSpheref(&sphere, 1.0f, 32);
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);
glGenBuffers(1, &g_indicesVBO);
glBindBuffer(GL_ARRAY_BUFFER, 0);
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);
glusShapeDestroyf(&sphere);
//
glUseProgram(g_program.program);
glusMatrix4x4LookAtf(g_viewMatrix, 0.0f, 0.0f, 6.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f);
glUniformMatrix4fv(g_viewMatrixLocation, 1, GL_FALSE, g_viewMatrix);
glusMatrix4x4ExtractMatrix3x3f(g_normalMatrix, g_viewMatrix);
glUniformMatrix3fv(g_normalMatrixLocation, 1, GL_FALSE, g_normalMatrix);
glusMatrix4x4MultiplyPoint4f(g_lightPosition, g_viewMatrix, g_lightPosition);
glUniform4fv(g_lightPositionLocation, 1, g_lightPosition);
//
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);
//
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 lightDirection[3] = { 1.0f, 1.0f, 1.0f };
GLfloat color[4] = { 1.0f, 0.0f, 0.0f, 1.0f };
GLUStextfile vertexSource;
GLUStextfile fragmentSource;
GLUSshape cube;
glusFileLoadText("../Example04_ES/shader/basic.vert.glsl", &vertexSource);
glusFileLoadText("../Example04_ES/shader/color.frag.glsl", &fragmentSource);
glusProgramBuildFromSource(&g_program, (const GLUSchar**) &vertexSource.text, (const GLUSchar**) &fragmentSource.text);
glusFileDestroyText(&vertexSource);
glusFileDestroyText(&fragmentSource);
//
// Retrieve the uniform locations in the program.
g_modelViewProjectionMatrixLocation = glGetUniformLocation(g_program.program, "u_modelViewProjectionMatrix");
g_normalMatrixLocation = glGetUniformLocation(g_program.program, "u_normalMatrix");
g_lightDirectionLocation = glGetUniformLocation(g_program.program, "u_lightDirection");
g_colorLocation = glGetUniformLocation(g_program.program, "u_color");
g_vertexLocation = glGetAttribLocation(g_program.program, "a_vertex");
g_normalLocation = glGetAttribLocation(g_program.program, "a_normal");
//
// Use a helper function to create a cube.
glusShapeCreateCubef(&cube, 0.5f);
// Store the number indices, as we will render with glDrawElements.
g_numberIndicesCube = cube.numberIndices;
glGenBuffers(1, &g_verticesVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
glBufferData(GL_ARRAY_BUFFER, cube.numberVertices * 4 * sizeof(GLfloat), (GLfloat*) cube.vertices, GL_STATIC_DRAW);
glGenBuffers(1, &g_normalsVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_normalsVBO);
glBufferData(GL_ARRAY_BUFFER, cube.numberVertices * 3 * sizeof(GLfloat), (GLfloat*) cube.normals, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
// Generate a VBO for the indices.
glGenBuffers(1, &g_indicesVBO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesVBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, cube.numberIndices * sizeof(GLuint), (GLuint*) cube.indices, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glusShapeDestroyf(&cube);
//
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);
//
// Light direction needs to have unit length. This light direction is given in world space.
glusVector3Normalizef(lightDirection);
// Set the light direction ...
glUniform3fv(g_lightDirectionLocation, 1, lightDirection);
// ... and the red color (ambient and diffuse) for the cube.
glUniform4fv(g_colorLocation, 1, color);
//
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
// Setting default clear depth value.
glClearDepthf(1.0f);
// Enable depth testing.
glEnable(GL_DEPTH_TEST);
// Enable back face culling.
glEnable(GL_CULL_FACE);
return GLUS_TRUE;
}
GLUSboolean init(GLUSvoid)
{
GLUStextfile vertexSource;
GLUStextfile fragmentSource;
GLUStgaimage image;
GLUSshape plane;
//
glusMatrix4x4LookAtf(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;
}
//
glusFileLoadText("../Example19/shader/basic_proj.vert.glsl", &vertexSource);
glusFileLoadText("../Example19/shader/texture_multi_proj.frag.glsl", &fragmentSource);
glusProgramBuildFromSource(&g_program, (const GLUSchar**) &vertexSource.text, 0, 0, 0, (const GLUSchar**) &fragmentSource.text);
glusFileDestroyText(&vertexSource);
glusFileDestroyText(&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.
glusImageLoadTga("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_COMPONENT, 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);
//
//
//
glusShapeCreatePlanef(&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);
glusShapeDestroyf(&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);
glClearDepth(1.0f);
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
return GLUS_TRUE;
}
GLUSboolean GLUSAPIENTRY glusShapeCreateAdjacencyIndicesf(GLUSshape* adjacencyShape, const GLUSshape* sourceShape)
{
GLUSuint i;
GLUSuint numberIndices;
GLUSuint adjacentIndex, edge;
if (!adjacencyShape || !sourceShape)
{
return GLUS_FALSE;
}
if (sourceShape->mode != GLUS_TRIANGLES)
{
return GLUS_FALSE;
}
numberIndices = sourceShape->numberIndices * 2;
if (numberIndices > GLUS_MAX_INDICES)
{
return GLUS_FALSE;
}
if (!glusShapeCopyf(adjacencyShape, sourceShape))
{
glusShapeDestroyf(adjacencyShape);
return GLUS_FALSE;
}
adjacencyShape->numberIndices = numberIndices;
glusMemoryFree(adjacencyShape->indices);
adjacencyShape->indices = (GLUSuint*)glusMemoryMalloc(numberIndices * sizeof(GLUSuint));
adjacencyShape->mode = GLUS_TRIANGLES_ADJACENCY;
if (!glusShapeCheckCompletef(adjacencyShape))
{
glusShapeDestroyf(adjacencyShape);
return GLUS_FALSE;
}
// Process all triangles
for (i = 0; i < sourceShape->numberIndices / 3; i++)
{
// For now, all adjacent triangles are degenerated.
adjacencyShape->indices[6 * i + 0] = sourceShape->indices[3 * i + 0];
adjacencyShape->indices[6 * i + 1] = sourceShape->indices[3 * i + 0];
adjacencyShape->indices[6 * i + 2] = sourceShape->indices[3 * i + 1];
adjacencyShape->indices[6 * i + 3] = sourceShape->indices[3 * i + 1];
adjacencyShape->indices[6 * i + 4] = sourceShape->indices[3 * i + 2];
adjacencyShape->indices[6 * i + 5] = sourceShape->indices[3 * i + 2];
// Skip degenerated triangles
if (sourceShape->indices[i * 3 + 0] == sourceShape->indices[i * 3 + 1] || sourceShape->indices[i * 3 + 0] == sourceShape->indices[i * 3 + 2] || sourceShape->indices[i * 3 + 1] == sourceShape->indices[i * 3 + 2])
{
continue;
}
// Find adjacent indices for each edge of the triangle ...
for (edge = 0; edge < 3; edge++)
{
adjacentIndex = 0;
// ... by scanning the indices ...
if (glusShapeFindIndexByIndicesf(&adjacentIndex, 3 * i, edge, sourceShape))
{
adjacencyShape->indices[6 * i + edge * 2 + 1] = adjacentIndex;
continue;
}
// ... and if not found, compare the vertices.
if (glusShapeFindIndexByVerticesf(&adjacentIndex, 3 * i, edge, sourceShape))
{
adjacencyShape->indices[6 * i + edge * 2 + 1] = adjacentIndex;
continue;
}
glusLogPrint(GLUS_LOG_WARNING, "Triangle %d with edge %d: No adjacent index found!", i, edge);
}
}
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, 1.0f, 0.0f, 1.0f }, { 0.0f, 1.0f, 0.0f, 1.0f }, { 1.0f, 1.0f, 1.0f, 1.0f }, 20.0f };
GLUStextfile vertexSource;
GLUStextfile fragmentSource;
GLUSshape wavefrontObj;
glusFileLoadText("../Example16/shader/phong.vert.glsl", &vertexSource);
glusFileLoadText("../Example16/shader/phong.frag.glsl", &fragmentSource);
glusProgramBuildFromSource(&g_program, (const GLUSchar**) &vertexSource.text, 0, 0, 0, (const GLUSchar**) &fragmentSource.text);
glusFileDestroyText(&vertexSource);
glusFileDestroyText(&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 load an wavefront object file.
glusShapeLoadWavefront("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);
glusShapeDestroyf(&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);
//
glusMatrix4x4LookAtf(g_viewMatrix, 0.0f, 0.0f, 5.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f);
//
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);
glEnable(GL_CULL_FACE);
return GLUS_TRUE;
}
GLUSboolean initBackground()
{
GLUStextfile vertexSource;
GLUStextfile fragmentSource;
GLUSshape background;
glusFileLoadText("../Example15_ES/shader/Background.vert.glsl", &vertexSource);
glusFileLoadText("../Example15_ES/shader/Background.frag.glsl", &fragmentSource);
glusProgramBuildFromSource(&g_programBackground, (const GLUSchar**) &vertexSource.text, (const GLUSchar**) &fragmentSource.text);
glusFileDestroyText(&vertexSource);
glusFileDestroyText(&fragmentSource);
//
g_projectionMatrixBackgroundLocation = glGetUniformLocation(g_programBackground.program, "u_projectionMatrix");
g_modelViewMatrixBackgroundLocation = glGetUniformLocation(g_programBackground.program, "u_modelViewMatrix");
g_cubemapBackgroundLocation = glGetUniformLocation(g_programBackground.program, "u_cubemap");
g_vertexBackgroundLocation = glGetAttribLocation(g_programBackground.program, "a_vertex");
g_normalBackgroundLocation = glGetAttribLocation(g_programBackground.program, "a_normal");
//
glBindVertexArray(0);
//
glusShapeCreateSpheref(&background, (GLfloat) (GLfloat) WATER_PLANE_LENGTH / 2.0f + 0.5f, 32);
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);
glusShapeDestroyf(&background);
//
glUseProgram(g_programBackground.program);
// We assume, that the parent program created the texture!
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_ARRAY_BUFFER, g_normalsBackgroundVBO);
glVertexAttribPointer(g_normalBackgroundLocation, 3, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_normalBackgroundLocation);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesBackgroundVBO);
return GLUS_TRUE;
}
GLUSuint initWaterTexture(GLUSfloat waterPlaneLength)
{
GLfloat projectionMatrixWaterTexture[16];
GLfloat modelViewMatrixWaterTexture[16];
GLUSshape plane;
GLUStextfile vertexSource;
GLUStextfile fragmentSource;
glusFileLoadText("../Example15/shader/WaterTexture.vert.glsl", &vertexSource);
glusFileLoadText("../Example15/shader/WaterTexture.frag.glsl", &fragmentSource);
glusProgramBuildFromSource(&g_programWaterTexture, (const GLUSchar**) &vertexSource.text, 0, 0, 0, (const GLUSchar**) &fragmentSource.text);
glusFileDestroyText(&vertexSource);
glusFileDestroyText(&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);
//
glusShapeCreatePlanef(&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);
glusShapeDestroyf(&plane);
//
glUseProgram(g_programWaterTexture.program);
glusMatrix4x4LookAtf(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);
glusMatrix4x4Orthof(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;
}
