GLUSboolean update(GLUSfloat time)
{
static GLfloat angle = 0.0f;
GLuint primitivesWritten;
// Field of view
GLfloat rotationMatrix[16];
GLfloat positionTextureSpace[4];
GLfloat directionTextureSpace[3];
GLfloat leftNormalTextureSpace[3];
GLfloat rightNormalTextureSpace[3];
GLfloat backNormalTextureSpace[3];
GLfloat xzPosition2D[4];
//
GLfloat tmvpMatrix[16];
// Animation update
g_personView.cameraPosition[0] = -cosf(2.0f * GLUS_PI * angle / TURN_DURATION) * TURN_RADIUS * METERS_TO_VIRTUAL_WORLD_SCALE;
g_personView.cameraPosition[2] = -sinf(2.0f * GLUS_PI * angle / TURN_DURATION) * TURN_RADIUS * METERS_TO_VIRTUAL_WORLD_SCALE;
g_personView.cameraDirection[0] = sinf(2.0f * GLUS_PI * angle / TURN_DURATION);
g_personView.cameraDirection[2] = -cosf(2.0f * GLUS_PI * angle / TURN_DURATION);
if (g_animationOn)
{
angle += time;
}
glusMatrix4x4LookAtf(g_viewMatrix, g_activeView->cameraPosition[0], g_activeView->cameraPosition[1], g_activeView->cameraPosition[2], g_activeView->cameraPosition[0] + g_activeView->cameraDirection[0], g_activeView->cameraPosition[1] + g_activeView->cameraDirection[1],
g_activeView->cameraPosition[2] + g_activeView->cameraDirection[2], g_activeView->cameraUp[0], g_activeView->cameraUp[1], g_activeView->cameraUp[2]);
glusMatrix4x4Identityf(tmvpMatrix);
glusMatrix4x4Multiplyf(tmvpMatrix, tmvpMatrix, g_projectionMatrix);
glusMatrix4x4Multiplyf(tmvpMatrix, tmvpMatrix, g_viewMatrix);
glusMatrix4x4Multiplyf(tmvpMatrix, tmvpMatrix, g_textureToWorldMatrix);
// Position
xzPosition2D[0] = g_personView.cameraPosition[0];
xzPosition2D[1] = 0.0f;
xzPosition2D[2] = g_personView.cameraPosition[2];
xzPosition2D[3] = g_personView.cameraPosition[3];
glusMatrix4x4MultiplyPoint4f(positionTextureSpace, g_worldToTextureMatrix, xzPosition2D);
// Direction
glusMatrix4x4MultiplyVector3f(directionTextureSpace, g_worldToTextureMatrix, g_personView.cameraDirection);
// Left normal of field of view
glusMatrix4x4Identityf(rotationMatrix);
glusMatrix4x4RotateRyf(rotationMatrix, g_personView.fov * (g_width / g_height) / 2.0f + 90.0f);
glusMatrix4x4MultiplyVector3f(leftNormalTextureSpace, rotationMatrix, g_personView.cameraDirection);
glusMatrix4x4MultiplyVector3f(leftNormalTextureSpace, g_worldToTextureNormalMatrix, leftNormalTextureSpace);
// Right normal of field of view
glusMatrix4x4Identityf(rotationMatrix);
glusMatrix4x4RotateRyf(rotationMatrix, -g_personView.fov * (g_width / g_height) / 2.0f - 90.0f);
glusMatrix4x4MultiplyVector3f(rightNormalTextureSpace, rotationMatrix, g_personView.cameraDirection);
glusMatrix4x4MultiplyVector3f(rightNormalTextureSpace, g_worldToTextureNormalMatrix, rightNormalTextureSpace);
// Back normal of field of view
glusMatrix4x4Identityf(rotationMatrix);
glusMatrix4x4RotateRyf(rotationMatrix, 180.0f);
glusMatrix4x4MultiplyVector3f(backNormalTextureSpace, rotationMatrix, g_personView.cameraDirection);
glusMatrix4x4MultiplyVector3f(backNormalTextureSpace, g_worldToTextureNormalMatrix, backNormalTextureSpace);
// OpenGL stuff
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Pass one.
// Disable any rasterization
glEnable(GL_RASTERIZER_DISCARD);
glUseProgram(g_programPassOne.program);
glUniform4fv(g_positionTextureSpacePassOneLocation, 1, positionTextureSpace);
glUniform3fv(g_leftNormalTextureSpacePassOneLocation, 1, leftNormalTextureSpace);
glUniform3fv(g_rightNormalTextureSpacePassOneLocation, 1, rightNormalTextureSpace);
glUniform3fv(g_backNormalTextureSpacePassOneLocation, 1, backNormalTextureSpace);
glBindVertexArray(g_vaoPassOne);
// Bind to vertices used in render pass two. To this buffer is written.
glBindBufferBase(GL_TRANSFORM_FEEDBACK_BUFFER, 0, g_verticesPassTwoVBO);
// We need to know, how many primitives are written. So start the query.
glBeginQuery(GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN, g_transformFeedbackQuery);
// Start the operation ...
glBeginTransformFeedback(GL_POINTS);
// ... render the elements ...
glDrawElements(GL_POINTS, g_sNumPoints * g_tNumPoints, GL_UNSIGNED_INT, 0);
// ... and stop the operation.
glEndTransformFeedback();
// Now, we can also stop the query.
glEndQuery(GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN);
glDisable(GL_RASTERIZER_DISCARD);
glBindBufferBase(GL_TRANSFORM_FEEDBACK_BUFFER, 0, 0);
glBindVertexArray(0);
// Pass two
glUseProgram(g_shaderProgramPassTwo.program);
glUniformMatrix4fv(g_tmvpPassTwoLocation, 1, GL_FALSE, tmvpMatrix);
glUniform4fv(g_positionTextureSpacePassTwoLocation, 1, positionTextureSpace);
glBindVertexArray(g_vaoPassTwo);
// Now get the number of primitives written in the first render pass.
glGetQueryObjectuiv(g_transformFeedbackQuery, GL_QUERY_RESULT, &primitivesWritten);
// No draw the final terrain.
glDrawArrays(GL_PATCHES, 0, primitivesWritten);
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);
//
glusFileLoadText("../Example12_ES/shader/rendershadow.vert.glsl", &vertexSource);
glusFileLoadText("../Example12_ES/shader/rendershadow.frag.glsl", &fragmentSource);
glusProgramBuildFromSource(&g_programShadow, (const GLUSchar**) &vertexSource.text, (const GLUSchar**) &fragmentSource.text);
glusFileDestroyText(&vertexSource);
glusFileDestroyText(&fragmentSource);
//
glusFileLoadText("../Example12_ES/shader/useshadow.vert.glsl", &vertexSource);
glusFileLoadText("../Example12_ES/shader/useshadow.frag.glsl", &fragmentSource);
glusProgramBuildFromSource(&g_program, (const GLUSchar**) &vertexSource.text, (const GLUSchar**) &fragmentSource.text);
glusFileDestroyText(&vertexSource);
glusFileDestroyText(&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);
//
glusShapeCreateTorusf(&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);
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);
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 update(GLUSfloat time)
{
static GLfloat angle = 0.0f;
GLfloat shadowMatrix[16];
GLfloat modelViewMatrix[16];
GLfloat viewMatrix[16];
GLfloat modelMatrix[16];
GLfloat normalMatrix[9];
// Rendering into the shadow texture.
glBindTexture(GL_TEXTURE_2D, 0);
// Setup for the framebuffer.
glBindFramebuffer(GL_FRAMEBUFFER, g_fbo);
glViewport(0, 0, g_shadowTextureSize, g_shadowTextureSize);
glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
glusMatrix4x4LookAtf(viewMatrix, g_lightPosition[0], g_lightPosition[1], g_lightPosition[2], 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f);
glusMatrix4x4Multiplyf(shadowMatrix, g_shadowMatrix, viewMatrix);
glClear(GL_DEPTH_BUFFER_BIT);
glUseProgram(g_programShadow.program);
// Render the torus.
glusMatrix4x4Identityf(modelMatrix);
glusMatrix4x4RotateRzRxRyf(modelMatrix, 0.0f, 0.0f, angle);
glusMatrix4x4Multiplyf(modelViewMatrix, viewMatrix, modelMatrix);
glUniformMatrix4fv(g_modelViewMatrixShadowLocation, 1, GL_FALSE, modelViewMatrix);
glBindVertexArray(g_vaoShadow);
glEnable(GL_POLYGON_OFFSET_FILL);
glFrontFace(GL_CW);
glDrawElements(GL_TRIANGLES, g_numberIndicesSphere, GL_UNSIGNED_INT, 0);
glDisable(GL_POLYGON_OFFSET_FILL);
glFrontFace(GL_CCW);
// Revert for the scene.
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
glViewport(0, 0, g_width, g_height);
glBindTexture(GL_TEXTURE_2D, g_shadowTexture);
//
// Render the scene.
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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);
glUniformMatrix4fv(g_viewMatrixLocation, 1, GL_FALSE, viewMatrix);
glUniformMatrix4fv(g_shadowMatrixLocation, 1, GL_FALSE, shadowMatrix);
// Plane
glusMatrix4x4Identityf(modelMatrix);
glusMatrix4x4Translatef(modelMatrix, 0.0f, 0.0f, -5.0f);
glusMatrix4x4Multiplyf(modelViewMatrix, viewMatrix, modelMatrix);
glusMatrix4x4ExtractMatrix3x3f(normalMatrix, modelViewMatrix);
glUniformMatrix4fv(g_modelMatrixLocation, 1, GL_FALSE, modelMatrix);
glUniformMatrix3fv(g_normalMatrixLocation, 1, GL_FALSE, normalMatrix);
glUniform4f(g_colorLocation, 0.0f, 0.5f, 0.0f, 1.0f);
glBindVertexArray(g_vaoBackground);
glDrawElements(GL_TRIANGLES, g_numberIndicesBackground, GL_UNSIGNED_INT, 0);
// Torus
glusMatrix4x4Identityf(modelMatrix);
glusMatrix4x4RotateRzRxRyf(modelMatrix, 0.0f, 0.0f, angle);
glusMatrix4x4Multiplyf(modelViewMatrix, viewMatrix, modelMatrix);
glusMatrix4x4ExtractMatrix3x3f(normalMatrix, modelViewMatrix);
glUniformMatrix4fv(g_modelMatrixLocation, 1, GL_FALSE, modelMatrix);
glUniformMatrix3fv(g_normalMatrixLocation, 1, GL_FALSE, normalMatrix);
glUniform4f(g_colorLocation, 0.33f, 0.0f, 0.5f, 1.0f);
glBindVertexArray(g_vao);
glDrawElements(GL_TRIANGLES, g_numberIndicesSphere, GL_UNSIGNED_INT, 0);
//
angle += 20.0f * time;
return GLUS_TRUE;
}
GLUSboolean init(GLUSvoid)
{
GLUSshape cube;
GLUStgaimage image;
GLUStextfile vertexSource;
GLUStextfile fragmentSource;
glusFileLoadText("../Example08_ES/shader/cubemap.vert.glsl", &vertexSource);
glusFileLoadText("../Example08_ES/shader/cubemap.frag.glsl", &fragmentSource);
glusProgramBuildFromSource(&g_program, (const GLUSchar**) &vertexSource.text, (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_inverseViewMatrixLocation = glGetUniformLocation(g_program.program, "u_inverseViewMatrix");
g_cubemapTextureLocation = glGetUniformLocation(g_program.program, "u_cubemapTexture");
g_vertexLocation = glGetAttribLocation(g_program.program, "a_vertex");
g_normalLocation = glGetAttribLocation(g_program.program, "a_normal");
//
// Here we create the cube map.
glGenTextures(1, &g_cubemapTexture);
glBindTexture(GL_TEXTURE_CUBE_MAP, g_cubemapTexture);
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);
//
glusShapeCreateCubef(&cube, 0.5f);
g_numberIndicesSphere = 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);
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);
//
// Activate and set the cube map.
glUniform1i(g_cubemapTextureLocation, 0);
glBindTexture(GL_TEXTURE_CUBE_MAP, g_cubemapTexture);
//
// As the camera does not move, we can create the view matrix here.
glusMatrix4x4LookAtf(g_viewMatrix, 0.0f, 0.0f, 5.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f);
//
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClearDepthf(1.0f);
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
return GLUS_TRUE;
}
GLUSboolean update(GLUSfloat time)
{
static GLfloat angle = 0.0f;
GLfloat angleRadians;
GLfloat viewProjectionMatrix[16];
GLfloat viewMatrix[16];
GLfloat modelMatrix[16];
GLfloat normalMatrix[9];
GLfloat camera[4] = {0.0, 0.0, 0.0, 1.0};
angleRadians = glusMathDegToRadf(angle);
camera[0] = g_circleRadius * -sinf(angleRadians);
camera[2] = g_circleRadius * cosf(angleRadians);
// Circle with the camera around the origin by looking at it.
glusMatrix4x4LookAtf(viewMatrix, camera[0], 0.0f, camera[2], 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f);
glusMatrix4x4Multiplyf(viewProjectionMatrix, g_projectionMatrix, viewMatrix);
glusMatrix4x4Identityf(modelMatrix);
glusMatrix4x4Translatef(modelMatrix, 0.0f, -0.5f, 0.0f);
glusMatrix4x4RotateRxf(modelMatrix, 45.0f);
glusMatrix4x4ExtractMatrix3x3f(normalMatrix, modelMatrix);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
//
// First render the background.
glUseProgram(g_programBackground.program);
glUniformMatrix4fv(g_viewProjectionMatrixBackgroundLocation, 1, GL_FALSE, viewProjectionMatrix);
glUniformMatrix4fv(g_modelMatrixBackgroundLocation, 1, GL_FALSE, modelMatrix);
glBindVertexArray(g_vaoBackground);
glFrontFace(GL_CW);
glDrawElements(GL_TRIANGLES, g_numberIndicesBackground, GL_UNSIGNED_INT, 0);
// Now render the sphere.
glUseProgram(g_program.program);
glUniformMatrix4fv(g_viewProjectionMatrixLocation, 1, GL_FALSE, viewProjectionMatrix);
glUniformMatrix4fv(g_modelMatrixLocation, 1, GL_FALSE, modelMatrix);
glUniformMatrix3fv(g_normalMatrixLocation, 1, GL_FALSE, normalMatrix);
glUniform4fv(g_cameraLocation, 1, camera);
glBindVertexArray(g_vao);
glFrontFace(GL_CCW);
glDrawElements(GL_TRIANGLES, g_numberIndicesSphere, GL_UNSIGNED_INT, 0);
// Increase the angle 30 degree per second.
angle += 30.0f * time;
return GLUS_TRUE;
}
GLUSboolean init(GLUSvoid)
{
GLUSshape wavefrontObj;
GLUStextfile vertexSource;
GLUStextfile fragmentSource;
GLfloat viewMatrix[16];
GLfloat lightDirection[3];
lightDirection[0] = g_lightPosition[0];
lightDirection[1] = g_lightPosition[1];
lightDirection[2] = g_lightPosition[2];
glusVector3Normalizef(lightDirection);
//
glusFileLoadText("../Example34/shader/renderdepthmap.vert.glsl", &vertexSource);
glusFileLoadText("../Example34/shader/renderdepthmap.frag.glsl", &fragmentSource);
glusProgramBuildFromSource(&g_programDepthPass, (const GLUSchar**) &vertexSource.text, 0, 0, 0, (const GLUSchar**) &fragmentSource.text);
glusFileDestroyText(&vertexSource);
glusFileDestroyText(&fragmentSource);
//
glusFileLoadText("../Example34/shader/subsurfacescattering.vert.glsl", &vertexSource);
glusFileLoadText("../Example34/shader/subsurfacescattering.frag.glsl", &fragmentSource);
glusProgramBuildFromSource(&g_program, (const GLUSchar**) &vertexSource.text, 0, 0, 0, (const GLUSchar**) &fragmentSource.text);
glusFileDestroyText(&vertexSource);
glusFileDestroyText(&fragmentSource);
//
g_projectionMatrixDepthPassLocation = glGetUniformLocation(g_programDepthPass.program, "u_projectionMatrix");
g_modelViewMatrixDepthPassLocation = glGetUniformLocation(g_programDepthPass.program, "u_modelViewMatrix");
g_vertexDepthPassLocation = glGetAttribLocation(g_programDepthPass.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_depthPassMatrixLocation = glGetUniformLocation(g_program.program, "u_depthPassMatrix");
g_diffuseColorLocation = glGetUniformLocation(g_program.program, "u_diffuseColor");
g_scatterColorLocation = glGetUniformLocation(g_program.program, "u_scatterColor");
g_lightDirectionLocation = glGetUniformLocation(g_program.program, "u_lightDirection");
g_depthPassTextureLocation = glGetUniformLocation(g_program.program, "u_depthPassTexture");
g_nearFarLocation = glGetUniformLocation(g_program.program, "u_nearFar");
g_wrapLocation = glGetUniformLocation(g_program.program, "u_wrap");
g_scatterWidthLocation = glGetUniformLocation(g_program.program, "u_scatterWidth");
g_scatterFalloffLocation = glGetUniformLocation(g_program.program, "u_scatterFalloff");
g_vertexLocation = glGetAttribLocation(g_program.program, "a_vertex");
g_normalLocation = glGetAttribLocation(g_program.program, "a_normal");
//
glGenTextures(1, &g_depthPassTexture);
glBindTexture(GL_TEXTURE_2D, g_depthPassTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT32F, g_depthPassTextureSize, g_depthPassTextureSize, 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);
glBindTexture(GL_TEXTURE_2D, 0);
//
glGenFramebuffers(1, &g_fbo);
glBindFramebuffer(GL_FRAMEBUFFER, g_fbo);
glDrawBuffer(GL_NONE);
glReadBuffer(GL_NONE);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, g_depthPassTexture, 0);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
{
printf("GL_FRAMEBUFFER_COMPLETE error 0x%x", glCheckFramebufferStatus(GL_FRAMEBUFFER));
return GLUS_FALSE;
}
glClearDepth(1.0f);
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
//
// 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_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);
glUniform1i(g_depthPassTextureLocation, 0);
// Dragon
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);
//
glUseProgram(g_programDepthPass.program);
// Dragon
glGenVertexArrays(1, &g_vaoDepthPass);
glBindVertexArray(g_vaoDepthPass);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
glVertexAttribPointer(g_vertexDepthPassLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_vertexDepthPassLocation);
//
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClearDepth(1.0f);
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
return GLUS_TRUE;
}
GLUSboolean update(GLUSfloat time)
{
static GLfloat angle = 0.0f;
GLfloat depthPassMatrix[16];
GLfloat modelViewMatrix[16];
GLfloat viewMatrix[16];
GLfloat modelMatrix[16];
GLfloat normalMatrix[9];
// Rendering into the depth pass texture.
glBindTexture(GL_TEXTURE_2D, 0);
// Setup for the framebuffer.
glBindFramebuffer(GL_FRAMEBUFFER, g_fbo);
glViewport(0, 0, g_depthPassTextureSize, g_depthPassTextureSize);
glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
glusMatrix4x4LookAtf(viewMatrix, g_lightPosition[0], g_lightPosition[1], g_lightPosition[2], 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f);
glusMatrix4x4Multiplyf(depthPassMatrix, g_depthPassMatrix, viewMatrix);
glClear(GL_DEPTH_BUFFER_BIT);
glUseProgram(g_programDepthPass.program);
// Render the Dragon.
glusMatrix4x4Identityf(modelMatrix);
glusMatrix4x4RotateRzRxRyf(modelMatrix, 0.0f, 0.0f, angle);
// Upscaling a little bit avoids artifacts.
glusMatrix4x4Scalef(modelMatrix, 1.05f, 1.05f, 1.05f);
glusMatrix4x4Multiplyf(modelViewMatrix, viewMatrix, modelMatrix);
glUniformMatrix4fv(g_modelViewMatrixDepthPassLocation, 1, GL_FALSE, modelViewMatrix);
glBindVertexArray(g_vaoDepthPass);
glDrawArrays(GL_TRIANGLES, 0, g_numberVertices);
// Revert for the scene.
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
glViewport(0, 0, g_width, g_height);
glBindTexture(GL_TEXTURE_2D, g_depthPassTexture);
//
// Render the scene.
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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);
glUniformMatrix4fv(g_viewMatrixLocation, 1, GL_FALSE, viewMatrix);
glUniformMatrix4fv(g_depthPassMatrixLocation, 1, GL_FALSE, depthPassMatrix);
// Dragon
glusMatrix4x4Identityf(modelMatrix);
glusMatrix4x4RotateRzRxRyf(modelMatrix, 0.0f, 0.0f, angle);
glusMatrix4x4Multiplyf(modelViewMatrix, viewMatrix, modelMatrix);
glusMatrix4x4ExtractMatrix3x3f(normalMatrix, modelViewMatrix);
glUniformMatrix4fv(g_modelMatrixLocation, 1, GL_FALSE, modelMatrix);
glUniformMatrix3fv(g_normalMatrixLocation, 1, GL_FALSE, normalMatrix);
glUniform4f(g_diffuseColorLocation, 0.8f, 0.0f, 0.0f, 1.0f);
glUniform4f(g_scatterColorLocation, 0.8f, 0.8f, 0.0f, 1.0f);
glUniform2f(g_nearFarLocation, g_near, g_far);
glUniform1f(g_wrapLocation, g_wrap);
glUniform1f(g_scatterWidthLocation, g_scatterWidth);
glUniform1f(g_scatterFalloffLocation, g_scatterFalloff);
glBindVertexArray(g_vao);
glDrawArrays(GL_TRIANGLES, 0, g_numberVertices);
//
angle += 20.0f * time;
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 update(GLUSfloat time)
{
static GLfloat angle = 0.0f;
GLfloat modelViewMatrix[16];
GLfloat viewMatrix[16];
GLfloat shadowProjectionMatrix[16];
GLfloat modelMatrix[16];
GLfloat normalMatrix[9];
// This shadow plane represents mathematically the background plane
GLfloat shadowPlane[4] = {0.0f, 0.0f, 1.0f, 5.0f};
glusMatrix4x4LookAtf(viewMatrix, g_cameraPosition[0], g_cameraPosition[1], g_cameraPosition[2], 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
//
// Render the scene.
//
glUseProgram(g_program.program);
glUniformMatrix4fv(g_viewMatrixLocation, 1, GL_FALSE, viewMatrix);
// Background Plane
glusMatrix4x4Identityf(modelMatrix);
glusMatrix4x4Translatef(modelMatrix, 0.0f, 0.0f, -5.0f);
glusMatrix4x4Multiplyf(modelViewMatrix, viewMatrix, modelMatrix);
glusMatrix4x4ExtractMatrix3x3f(normalMatrix, modelViewMatrix);
glUniformMatrix4fv(g_modelMatrixLocation, 1, GL_FALSE, modelMatrix);
glUniformMatrix3fv(g_normalMatrixLocation, 1, GL_FALSE, normalMatrix);
glUniform4f(g_colorLocation, 0.0f, 0.5f, 0.0f, 1.0f);
glBindVertexArray(g_vaoBackground);
glDrawElements(GL_TRIANGLES, g_numberIndicesBackground, GL_UNSIGNED_INT, 0);
//
// Render the planar shadow
//
glUseProgram(g_programShadow.program);
glUniformMatrix4fv(g_viewMatrixShadowLocation, 1, GL_FALSE, viewMatrix);
// Torus projected as a shadow
glusMatrix4x4PlanarShadowDirectionalLightf(shadowProjectionMatrix, shadowPlane, g_lightDirection);
glUniformMatrix4fv(g_shadowProjectionMatrixShadowLocation, 1, GL_FALSE, shadowProjectionMatrix);
glusMatrix4x4Identityf(modelMatrix);
glusMatrix4x4RotateRzRxRyf(modelMatrix, 0.0f, 0.0f, angle);
glUniformMatrix4fv(g_modelMatrixShadowLocation, 1, GL_FALSE, modelMatrix);
glBindVertexArray(g_vaoShadow);
// Overwrite the background plane
glDisable(GL_DEPTH_TEST);
glDrawElements(GL_TRIANGLES, g_numberIndicesTorus, GL_UNSIGNED_INT, 0);
glEnable(GL_DEPTH_TEST);
// Torus with color
glUseProgram(g_program.program);
glusMatrix4x4Multiplyf(modelViewMatrix, viewMatrix, modelMatrix);
glusMatrix4x4ExtractMatrix3x3f(normalMatrix, modelViewMatrix);
glUniformMatrix4fv(g_modelMatrixLocation, 1, GL_FALSE, modelMatrix);
glUniformMatrix3fv(g_normalMatrixLocation, 1, GL_FALSE, normalMatrix);
glUniform4f(g_colorLocation, 0.33f, 0.0f, 0.5f, 1.0f);
glBindVertexArray(g_vao);
glDrawElements(GL_TRIANGLES, g_numberIndicesTorus, GL_UNSIGNED_INT, 0);
//
angle += 20.0f * time;
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)
{
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 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;
}
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;
}
