static GLUSvoid freeTgaImages(GLUSint currentElement)
{
GLUSint i;
for (i = 0; i < currentElement; i++)
{
glusDestroyTgaImage(&g_tgaimage[i]);
}
}
Texture2D::Texture2D(const std::string& file_name)
{
// loading with DevIL
//
//m_colorTexture = CreateGLTextureFromFile(file_name);
// loading with GLUS
//
GLUStgaimage image;
std::string ext = file_name.substr(file_name.size()-4, file_name.size());
bool fileWasSuccesfullyLoaded = false;
#pragma warning(disable:4800)
if(ext == ".tga")
fileWasSuccesfullyLoaded = bool(glusLoadTgaImage(file_name.c_str(), &image));
else if(ext == ".bmp")
fileWasSuccesfullyLoaded = bool(glusLoadBmpImage(file_name.c_str(), &image));
if(!fileWasSuccesfullyLoaded || image.data == NULL)
throw std::runtime_error( (std::string("can not load") + file_name).c_str() );
glGenTextures(1, &m_colorTexture); CHECK_GL_ERRORS;
glBindTexture(GL_TEXTURE_2D, m_colorTexture); CHECK_GL_ERRORS;
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR); CHECK_GL_ERRORS;
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); CHECK_GL_ERRORS;
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); CHECK_GL_ERRORS;
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); CHECK_GL_ERRORS;
glTexImage2D(GL_TEXTURE_2D, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data); CHECK_GL_ERRORS;
glGenerateMipmap(GL_TEXTURE_2D);
glusDestroyTgaImage(&image);
// set anisotropic filter
//
glBindTexture(GL_TEXTURE_2D, m_colorTexture); CHECK_GL_ERRORS;
float maxValue = 0;
glGetFloatv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &maxValue); CHECK_GL_ERRORS;
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, maxValue); CHECK_GL_ERRORS;
glBindTexture(GL_TEXTURE_2D, 0);
}
GLUSboolean GLUSAPIENTRY glusCreatePerlinNoise1D(GLUStgaimage* image, const GLUSint width, const GLUSint seed, const GLUSfloat frequency, const GLUSfloat amplitude, const GLUSfloat persistence, const GLUSint octaves)
{
GLUSint i;
GLUSfloat* data;
GLUSint* data1D;
GLUSfloat frequencyFactor;
GLUSfloat amplitudeFactor;
if (!image)
{
return GLUS_FALSE;
}
if (persistence <= 0.0f || width < 1)
{
return GLUS_FALSE;
}
image->width = (GLUSushort)width;
image->height = 1;
image->depth = 1;
image->format = GLUS_RED;
image->data = malloc(width * sizeof(GLUSubyte));
if (!image->data)
{
glusDestroyTgaImage(image);
return GLUS_FALSE;
}
data = malloc(width * sizeof(GLUSfloat));
if (!data)
{
glusDestroyTgaImage(image);
return GLUS_FALSE;
}
for (i = 0; i < width; i++)
{
data[i] = 0.0f;
}
//
data1D = malloc(width * sizeof(GLUSint));
if (!data1D)
{
glusDestroyTgaImage(image);
free(data);
return GLUS_FALSE;
}
srand(seed);
for (i = 0; i < width; i++)
{
data1D[i] = rand();
}
//
frequencyFactor = 1.0f;
amplitudeFactor = 1.0f / persistence;
for (i = 0; i < octaves; i++)
{
GLUSint x;
GLUSint waveLenghtX;
GLUSfloat currentFrequency = frequency * frequencyFactor;
GLUSfloat currentAmplitude = amplitude / (1.0f * amplitudeFactor);
if (currentFrequency <= 1.0f)
{
currentFrequency = 1.0f;
}
waveLenghtX = width / (GLUSint)currentFrequency;
if (waveLenghtX < 1)
{
waveLenghtX = 1;
}
// Render per wavelength
for (x = 0; x < width; x += waveLenghtX)
{
GLUSint xInner;
GLUSfloat p[2];
GLUSint xRandom = x / waveLenghtX;
// Get random values from adjacent points
p[0] = glusGetNoiseValue1D(image, xRandom, (GLUSint)currentAmplitude, data1D);
p[1] = glusGetNoiseValue1D(image, xRandom + 1, (GLUSint)currentAmplitude, data1D);
// Sample the points in the wavelength area
for (xInner = 0; xInner < waveLenghtX && x + xInner < width; xInner++)
{
GLUSint index = x + xInner;
data[index] += glusGetInterpolatedValue(p[0], p[1], (GLUSfloat)xInner / (GLUSfloat)waveLenghtX);
}
}
frequencyFactor *= 2.0f;
amplitudeFactor *= 1.0f / persistence;
}
free(data1D);
for (i = 0; i < width; i++)
{
image->data[i] = (GLUSubyte)data[i];
}
free(data);
return GLUS_TRUE;
}
GLUSboolean GLUSAPIENTRY glusCreatePerlinNoise3D(GLUStgaimage* image, const GLUSint width, const GLUSint height, const GLUSint depth, const GLUSint seed, const GLUSfloat frequency, const GLUSfloat amplitude, const GLUSfloat persistence, const GLUSint octaves)
{
GLUSint i;
GLUSfloat* data;
GLUSint* data3D;
GLUSfloat frequencyFactor;
GLUSfloat amplitudeFactor;
if (!image)
{
return GLUS_FALSE;
}
if (persistence <= 0.0f || width < 1 || height < 1 || depth < 1)
{
return GLUS_FALSE;
}
image->width = (GLUSushort)width;
image->height = (GLUSushort)height;
image->depth = (GLUSushort)depth;
image->format = GLUS_RED;
image->data = malloc(width * height * depth * sizeof(GLUSubyte));
if (!image->data)
{
glusDestroyTgaImage(image);
return GLUS_FALSE;
}
data = malloc(width * height * depth * sizeof(GLUSfloat));
if (!data)
{
glusDestroyTgaImage(image);
return GLUS_FALSE;
}
for (i = 0; i < width * height * depth; i++)
{
data[i] = 0.0f;
}
//
data3D = malloc(width * height * depth * sizeof(GLUSint));
if (!data3D)
{
glusDestroyTgaImage(image);
free(data);
return GLUS_FALSE;
}
srand(seed);
for (i = 0; i < width * height * depth; i++)
{
data3D[i] = rand();
}
//
frequencyFactor = 1.0f;
amplitudeFactor = 1.0f / persistence;
for (i = 0; i < octaves; i++)
{
GLUSint x, y, z;
GLUSint waveLenghtX;
GLUSint waveLenghtY;
GLUSint waveLenghtZ;
GLUSfloat currentFrequency = frequency * frequencyFactor;
GLUSfloat currentAmplitude = amplitude / (1.0f * amplitudeFactor);
if (currentFrequency <= 1.0f)
{
currentFrequency = 1.0f;
}
waveLenghtX = width / (GLUSint)currentFrequency;
waveLenghtY = height / (GLUSint)currentFrequency;
waveLenghtZ = depth / (GLUSint)currentFrequency;
if (waveLenghtX < 1)
{
waveLenghtX = 1;
}
if (waveLenghtY < 1)
{
waveLenghtY = 1;
}
if (waveLenghtZ < 1)
{
waveLenghtZ = 1;
}
// Render per wavelength
for (z = 0; z < depth; z += waveLenghtZ)
{
for (y = 0; y < height; y += waveLenghtY)
{
for (x = 0; x < width; x += waveLenghtX)
{
GLUSint xInner, yInner, zInner;
GLUSfloat p[8];
GLUSint xRandom = x / waveLenghtX;
GLUSint yRandom = y / waveLenghtY;
GLUSint zRandom = z / waveLenghtZ;
// Get random values from adjacent points
p[0] = glusGetNoiseValue3D(image, xRandom, yRandom, zRandom, (GLUSint)currentAmplitude, data3D);
p[1] = glusGetNoiseValue3D(image, xRandom + 1, yRandom, zRandom, (GLUSint)currentAmplitude, data3D);
p[2] = glusGetNoiseValue3D(image, xRandom, yRandom + 1, zRandom, (GLUSint)currentAmplitude, data3D);
p[3] = glusGetNoiseValue3D(image, xRandom + 1, yRandom + 1, zRandom, (GLUSint)currentAmplitude, data3D);
p[4] = glusGetNoiseValue3D(image, xRandom, yRandom, zRandom + 1, (GLUSint)currentAmplitude, data3D);
p[5] = glusGetNoiseValue3D(image, xRandom + 1, yRandom, zRandom + 1, (GLUSint)currentAmplitude, data3D);
p[6] = glusGetNoiseValue3D(image, xRandom, yRandom + 1, zRandom + 1, (GLUSint)currentAmplitude, data3D);
p[7] = glusGetNoiseValue3D(image, xRandom + 1, yRandom + 1, zRandom + 1, (GLUSint)currentAmplitude, data3D);
// Sample the points in the wavelength area
for (zInner = 0; zInner < waveLenghtZ && z + zInner < depth; zInner++)
{
for (yInner = 0; yInner < waveLenghtY && y + yInner < height; yInner++)
{
for (xInner = 0; xInner < waveLenghtX && x + xInner < width; xInner++)
{
GLUSint index = (z + zInner) * height * width + (y + yInner) * width + x + xInner;
GLUSfloat x0 = glusGetInterpolatedValue(p[0], p[1], (GLUSfloat)xInner / (GLUSfloat)waveLenghtX);
GLUSfloat x1 = glusGetInterpolatedValue(p[2], p[3], (GLUSfloat)xInner / (GLUSfloat)waveLenghtX);
GLUSfloat x2 = glusGetInterpolatedValue(p[4], p[5], (GLUSfloat)xInner / (GLUSfloat)waveLenghtX);
GLUSfloat x3 = glusGetInterpolatedValue(p[6], p[7], (GLUSfloat)xInner / (GLUSfloat)waveLenghtX);
GLUSfloat y0 = glusGetInterpolatedValue(x0, x1, (GLUSfloat)yInner / (GLUSfloat)waveLenghtY);
GLUSfloat y1 = glusGetInterpolatedValue(x2, x3, (GLUSfloat)yInner / (GLUSfloat)waveLenghtY);
data[index] += glusGetInterpolatedValue(y0, y1, (GLUSfloat)zInner / (GLUSfloat)waveLenghtZ);
}
}
}
}
}
}
frequencyFactor *= 2.0f;
amplitudeFactor *= 1.0f / persistence;
}
free(data3D);
for (i = 0; i < width * height * depth; i++)
{
image->data[i] = (GLUSubyte)data[i];
}
free(data);
return GLUS_TRUE;
}
GLUSboolean init(GLUSvoid)
{
GLUSshape plane;
GLUStextfile vertexSource;
GLUStextfile fragmentSource;
GLUStgaimage image;
GLfloat normalMatrix[9];
glusLoadTextFile("../Example07_ES/shader/normmap.vert.glsl", &vertexSource);
glusLoadTextFile("../Example07_ES/shader/normmap.frag.glsl", &fragmentSource);
glusBuildProgramFromSource(&g_program, (const GLUSchar**) &vertexSource.text, (const GLUSchar**) &fragmentSource.text);
glusDestroyTextFile(&vertexSource);
glusDestroyTextFile(&fragmentSource);
//
g_projectionMatrixLocation = glGetUniformLocation(g_program.program, "u_projectionMatrix");
g_modelViewMatrixLocation = glGetUniformLocation(g_program.program, "u_modelViewMatrix");
g_normalMatrixLocation = glGetUniformLocation(g_program.program, "u_normalMatrix");
g_lightDirectionLocation = glGetUniformLocation(g_program.program, "u_lightDirection");
// One texture for the color and one for the normals.
g_textureLocation = glGetUniformLocation(g_program.program, "u_texture");
g_normalMapLocation = glGetUniformLocation(g_program.program, "u_normalMap");
g_vertexLocation = glGetAttribLocation(g_program.program, "a_vertex");
// The tangent, bitangent and normal do define the tangent space. They are defined in object space, the inverse brings coordinates back to this tangent space.
g_tangentLocation = glGetAttribLocation(g_program.program, "a_tangent");
g_bitangentLocation = glGetAttribLocation(g_program.program, "a_bitangent");
g_normalLocation = glGetAttribLocation(g_program.program, "a_normal");
g_texCoordLocation = glGetAttribLocation(g_program.program, "a_texCoord");
//
glusLoadTgaImage("rock_color.tga", &image);
glGenTextures(1, &g_texture);
glBindTexture(GL_TEXTURE_2D, g_texture);
glTexImage2D(GL_TEXTURE_2D, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glBindTexture(GL_TEXTURE_2D, 0);
glusLoadTgaImage("rock_normal.tga", &image);
glGenTextures(1, &g_normalMap);
glBindTexture(GL_TEXTURE_2D, g_normalMap);
glTexImage2D(GL_TEXTURE_2D, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glBindTexture(GL_TEXTURE_2D, 0);
//
glusCreatePlanef(&plane, 1.5f);
g_numberIndicesPlane = plane.numberIndices;
glGenBuffers(1, &g_verticesVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
glBufferData(GL_ARRAY_BUFFER, plane.numberVertices * 4 * sizeof(GLfloat), (GLfloat*) plane.vertices, GL_STATIC_DRAW);
glGenBuffers(1, &g_tangentsVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_tangentsVBO);
glBufferData(GL_ARRAY_BUFFER, plane.numberVertices * 3 * sizeof(GLfloat), (GLfloat*) plane.tangents, GL_STATIC_DRAW);
glGenBuffers(1, &g_bitangentsVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_bitangentsVBO);
glBufferData(GL_ARRAY_BUFFER, plane.numberVertices * 3 * sizeof(GLfloat), (GLfloat*) plane.bitangents, GL_STATIC_DRAW);
glGenBuffers(1, &g_normalsVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_normalsVBO);
glBufferData(GL_ARRAY_BUFFER, plane.numberVertices * 3 * sizeof(GLfloat), (GLfloat*) plane.normals, GL_STATIC_DRAW);
glGenBuffers(1, &g_texCoordsVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_texCoordsVBO);
glBufferData(GL_ARRAY_BUFFER, plane.numberVertices * 2 * sizeof(GLfloat), (GLfloat*) plane.texCoords, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glGenBuffers(1, &g_indicesVBO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesVBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, g_numberIndicesPlane * sizeof(GLuint), (GLuint*) plane.indices, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glusDestroyShapef(&plane);
//
glUseProgram(g_program.program);
glGenVertexArrays(1, &g_vao);
glBindVertexArray(g_vao);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
glVertexAttribPointer(g_vertexLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_vertexLocation);
glBindBuffer(GL_ARRAY_BUFFER, g_tangentsVBO);
glVertexAttribPointer(g_tangentLocation, 3, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_tangentLocation);
glBindBuffer(GL_ARRAY_BUFFER, g_bitangentsVBO);
glVertexAttribPointer(g_bitangentLocation, 3, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_bitangentLocation);
glBindBuffer(GL_ARRAY_BUFFER, g_normalsVBO);
glVertexAttribPointer(g_normalLocation, 3, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_normalLocation);
glBindBuffer(GL_ARRAY_BUFFER, g_texCoordsVBO);
glVertexAttribPointer(g_texCoordLocation, 2, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_texCoordLocation);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesVBO);
//
glusLookAtf(g_viewMatrix, 0.0f, 0.0f, 5.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f);
glUniformMatrix4fv(g_modelViewMatrixLocation, 1, GL_FALSE, g_viewMatrix);
glusMatrix4x4ExtractMatrix3x3f(normalMatrix, g_viewMatrix);
glUniformMatrix3fv(g_normalMatrixLocation, 1, GL_FALSE, normalMatrix);
//
// Activate and bind first ...
glUniform1i(g_textureLocation, 0);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, g_texture);
// .. and second texture.
glUniform1i(g_normalMapLocation, 1);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, g_normalMap);
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
return GLUS_TRUE;
}
GLUSboolean init(GLUSvoid)
{
GLUSshape torus;
GLUSshape backgroundSphere;
GLUStgaimage image;
GLUStextfile vertexSource;
GLUStextfile fragmentSource;
glusLoadTextFile("../Example11_ES/shader/glass.vert.glsl", &vertexSource);
glusLoadTextFile("../Example11_ES/shader/glass.frag.glsl", &fragmentSource);
glusBuildProgramFromSource(&g_program, (const GLUSchar**) &vertexSource.text, (const GLUSchar**) &fragmentSource.text);
glusDestroyTextFile(&vertexSource);
glusDestroyTextFile(&fragmentSource);
//
glusLoadTextFile("../Example11_ES/shader/background.vert.glsl", &vertexSource);
glusLoadTextFile("../Example11_ES/shader/background.frag.glsl", &fragmentSource);
glusBuildProgramFromSource(&g_programBackground, (const GLUSchar**) &vertexSource.text, (const GLUSchar**) &fragmentSource.text);
glusDestroyTextFile(&vertexSource);
glusDestroyTextFile(&fragmentSource);
//
g_viewProjectionMatrixLocation = glGetUniformLocation(g_program.program, "u_viewProjectionMatrix");
g_modelMatrixLocation = glGetUniformLocation(g_program.program, "u_modelMatrix");
g_normalMatrixLocation = glGetUniformLocation(g_program.program, "u_normalMatrix");
g_cameraLocation = glGetUniformLocation(g_program.program, "u_camera");
g_cubemapLocation = glGetUniformLocation(g_program.program, "u_cubemap");
g_vertexLocation = glGetAttribLocation(g_program.program, "a_vertex");
g_normalLocation = glGetAttribLocation(g_program.program, "a_normal");
//
g_viewProjectionMatrixBackgroundLocation = glGetUniformLocation(g_programBackground.program, "u_viewProjectionMatrix");
g_modelMatrixBackgroundLocation = glGetUniformLocation(g_programBackground.program, "u_modelMatrix");
g_cubemapBackgroundLocation = glGetUniformLocation(g_programBackground.program, "u_cubemap");
g_vertexBackgroundLocation = glGetAttribLocation(g_programBackground.program, "a_vertex");
//
glGenTextures(1, &g_cubemap);
glBindTexture(GL_TEXTURE_CUBE_MAP, g_cubemap);
glusLoadTgaImage("cm_pos_x.tga", &image);
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
glusLoadTgaImage("cm_neg_x.tga", &image);
glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_X, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
glusLoadTgaImage("cm_pos_y.tga", &image);
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_Y, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
glusLoadTgaImage("cm_neg_y.tga", &image);
glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_Y, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
glusLoadTgaImage("cm_pos_z.tga", &image);
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_Z, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
glusLoadTgaImage("cm_neg_z.tga", &image);
glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_Z, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
//
glusCreateTorusf(&torus, 0.25f, 1.0f, 32, 32);
g_numberIndicesSphere = torus.numberIndices;
glGenBuffers(1, &g_verticesVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
glBufferData(GL_ARRAY_BUFFER, torus.numberVertices * 4 * sizeof(GLfloat), (GLfloat*) torus.vertices, GL_STATIC_DRAW);
glGenBuffers(1, &g_normalsVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_normalsVBO);
glBufferData(GL_ARRAY_BUFFER, torus.numberVertices * 3 * sizeof(GLfloat), (GLfloat*) torus.normals, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glGenBuffers(1, &g_indicesVBO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesVBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, torus.numberIndices * sizeof(GLuint), (GLuint*) torus.indices, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glusDestroyShapef(&torus);
//
glusCreateSpheref(&backgroundSphere, g_circleRadius, 32);
g_numberIndicesBackground = backgroundSphere.numberIndices;
glGenBuffers(1, &g_verticesBackgroundVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesBackgroundVBO);
glBufferData(GL_ARRAY_BUFFER, backgroundSphere.numberVertices * 4 * sizeof(GLfloat), (GLfloat*) backgroundSphere.vertices, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glGenBuffers(1, &g_indicesBackgroundVBO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesBackgroundVBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, backgroundSphere.numberIndices * sizeof(GLuint), (GLuint*) backgroundSphere.indices, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glusDestroyShapef(&backgroundSphere);
//
glUseProgram(g_program.program);
glUniform1i(g_cubemapLocation, 0);
glGenVertexArrays(1, &g_vao);
glBindVertexArray(g_vao);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
glVertexAttribPointer(g_vertexLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_vertexLocation);
glBindBuffer(GL_ARRAY_BUFFER, g_normalsVBO);
glVertexAttribPointer(g_normalLocation, 3, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_normalLocation);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesVBO);
//
glUseProgram(g_programBackground.program);
glUniform1i(g_cubemapBackgroundLocation, 0);
glGenVertexArrays(1, &g_vaoBackground);
glBindVertexArray(g_vaoBackground);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesBackgroundVBO);
glVertexAttribPointer(g_vertexBackgroundLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_vertexBackgroundLocation);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesBackgroundVBO);
//
glBindTexture(GL_TEXTURE_CUBE_MAP, g_cubemap);
//
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClearDepthf(1.0f);
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
return GLUS_TRUE;
}
GLUSboolean GLUSAPIENTRY glusLoadTgaImage(const GLUSchar* filename, GLUStgaimage* tgaimage)
{
FILE* file;
GLUSubyte type;
GLUSubyte bitsPerPixel;
size_t elementsRead;
// check, if we have a valid pointer
if (!filename || !tgaimage)
{
return GLUS_FALSE;
}
tgaimage->width = 0;
tgaimage->height = 0;
tgaimage->depth = 0;
tgaimage->data = 0;
tgaimage->format = 0;
// open filename in "read binary" mode
file = fopen(filename, "rb");
if (!file)
{
return GLUS_FALSE;
}
// seek through the tga header, up to the type:
if(fseek(file, 2, SEEK_CUR))
{
fclose(file);
return GLUS_FALSE;
}
// read the type
elementsRead = fread(&type, 1, 1, file);
if (!glusCheckFileRead(file, elementsRead, 1))
{
return GLUS_FALSE;
}
// check the type
if (type != 2 && type != 10 && type != 11)
{
fclose(file);
return GLUS_FALSE;
}
// seek through the tga header, up to the width/height:
if(fseek(file, 9, SEEK_CUR))
{
fclose(file);
return GLUS_FALSE;
}
// read the width
elementsRead = fread(&tgaimage->width, 2, 1, file);
if (!glusCheckFileRead(file, elementsRead, 1))
{
glusDestroyTgaImage(tgaimage);
return GLUS_FALSE;
}
if (tgaimage->width > GLUS_MAX_DIMENSION)
{
glusDestroyTgaImage(tgaimage);
return GLUS_FALSE;
}
// read the height
elementsRead = fread(&tgaimage->height, 2, 1, file);
if (!glusCheckFileRead(file, elementsRead, 1))
{
glusDestroyTgaImage(tgaimage);
return GLUS_FALSE;
}
if (tgaimage->height > GLUS_MAX_DIMENSION)
{
glusDestroyTgaImage(tgaimage);
return GLUS_FALSE;
}
tgaimage->depth = 1;
// read the bits per pixel
elementsRead = fread(&bitsPerPixel, 1, 1, file);
if (!glusCheckFileRead(file, elementsRead, 1))
{
glusDestroyTgaImage(tgaimage);
return GLUS_FALSE;
}
// check the pixel depth
if (bitsPerPixel != 8 && bitsPerPixel != 24 && bitsPerPixel != 32)
{
fclose(file);
return GLUS_FALSE;
}
else
{
tgaimage->format = GLUS_LUMINANCE;
if (bitsPerPixel == 24)
{
tgaimage->format = GLUS_RGB;
}
else if (bitsPerPixel == 32)
{
tgaimage->format = GLUS_RGBA;
}
}
// move file pointer to beginning of targa data
if(fseek(file, 1, SEEK_CUR))
{
fclose(file);
glusDestroyTgaImage(tgaimage);
return GLUS_FALSE;
}
// allocate enough memory for the targa data
tgaimage->data = (GLUSubyte*) malloc((size_t)tgaimage->width * tgaimage->height * bitsPerPixel / 8);
// verify memory allocation
if (!tgaimage->data)
{
fclose(file);
glusDestroyTgaImage(tgaimage);
return GLUS_FALSE;
}
if (type == 2)
{
// read in the raw data
elementsRead = fread(tgaimage->data, 1, (size_t)tgaimage->width * tgaimage->height * bitsPerPixel / 8, file);
if (!glusCheckFileRead(file, elementsRead, (size_t)tgaimage->width * tgaimage->height * bitsPerPixel / 8))
{
glusDestroyTgaImage(tgaimage);
return GLUS_FALSE;
}
}
else
{
// RLE encoded
GLUSint pixelsRead = 0;
while (pixelsRead < tgaimage->width * tgaimage->height)
{
GLUSubyte amount;
elementsRead = fread(&amount, 1, 1, file);
if (!glusCheckFileRead(file, elementsRead, 1))
{
glusDestroyTgaImage(tgaimage);
return GLUS_FALSE;
}
if (amount & 0x80)
{
GLUSint i;
GLUSint k;
amount &= 0x7F;
amount++;
// read in the rle data
elementsRead = fread(&tgaimage->data[pixelsRead * bitsPerPixel / 8], 1, bitsPerPixel / 8, file);
if (!glusCheckFileRead(file, elementsRead, bitsPerPixel / 8))
{
glusDestroyTgaImage(tgaimage);
return GLUS_FALSE;
}
for (i = 1; i < amount; i++)
{
for (k = 0; k < bitsPerPixel / 8; k++)
{
tgaimage->data[(pixelsRead + i) * bitsPerPixel / 8 + k] = tgaimage->data[pixelsRead * bitsPerPixel / 8 + k];
}
}
}
else
{
amount &= 0x7F;
amount++;
// read in the raw data
elementsRead = fread(&tgaimage->data[pixelsRead * bitsPerPixel / 8], 1, (size_t) amount * bitsPerPixel / 8, file);
if (!glusCheckFileRead(file, elementsRead, (size_t) amount * bitsPerPixel / 8))
{
glusDestroyTgaImage(tgaimage);
return GLUS_FALSE;
}
}
pixelsRead += amount;
}
}
// swap the color if necessary
if (bitsPerPixel == 24 || bitsPerPixel == 32)
{
glusSwapColorChannel(tgaimage->width, tgaimage->height, tgaimage->format, tgaimage->data);
}
// close the file
fclose(file);
return GLUS_TRUE;
}
/**
* Function for initialization.
*/
GLUSboolean init(GLUSvoid)
{
GLfloat points[] = { -1.0f, -1.0f, 0.0f, +1.0f, +1.0f, -1.0f, 0.0f, +1.0f, -1.0f, +1.0f, 0.0f, +1.0f, +1.0f, +1.0f, 0.0f, +1.0f };
GLfloat normals[] = { 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f };
GLfloat tangents[] = { 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f };
GLfloat texCoords[] = { 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f };
GLuint indices[] = { 0, 1, 2, 1, 3, 2 };
GLuint numberVertices = 4;
GLUStgaimage image;
GLUStextfile vertexSource;
GLUStextfile fragmentSource;
numberIndices = 6;
// Load the source of the vertex shader.
glusLoadTextFile("../src/Example06/Vertex.vs", &vertexSource);
// Load the source of the fragment shader.
glusLoadTextFile("../src/Example06/Fragment.fs", &fragmentSource);
// Build and ...
glusBuildProgram(&g_program, (const GLUSchar**) &vertexSource.text, 0, 0, 0, (const GLUSchar**) &fragmentSource.text);
// Destroy the text resource
glusDestroyTextFile(&vertexSource);
// Destroy the text resource
glusDestroyTextFile(&fragmentSource);
// ToDo:
glGenVertexArrays(1, &g_vao);
// ToDo:
glBindVertexArray(g_vao);
// http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformLocation.xml
g_projectionLocation = glGetUniformLocation(g_program.program, "projectionMatrix");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformLocation.xml
g_modelViewLocation = glGetUniformLocation(g_program.program, "modelViewMatrix");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformLocation.xml
g_lightDirLocation = glGetUniformLocation(g_program.program, "lightDir");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformLocation.xml
g_textureLocation = glGetUniformLocation(g_program.program, "firstTexture");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformLocation.xml
g_normalMapLocation = glGetUniformLocation(g_program.program, "normalMap");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetAttribLocation.xml
g_vertexLocation = glGetAttribLocation(g_program.program, "vertex");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetAttribLocation.xml
g_normalLocation = glGetAttribLocation(g_program.program, "normal");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetAttribLocation.xml
g_tangentLocation = glGetAttribLocation(g_program.program, "tangent");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetAttribLocation.xml
g_texCoordLocation = glGetAttribLocation(g_program.program, "texCoord");
// http://www.opengl.org/sdk/docs/man/xhtml/glGenBuffers.xml
glGenBuffers(1, &g_vertices);
// http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
glBindBuffer(GL_ARRAY_BUFFER, g_vertices);
// http://www.opengl.org/sdk/docs/man/xhtml/glBufferData.xml
glBufferData(GL_ARRAY_BUFFER, numberVertices * 4 * sizeof(GLfloat), (GLfloat*) points, GL_STATIC_DRAW);
// http://www.opengl.org/sdk/docs/man/xhtml/glGenBuffers.xml
glGenBuffers(1, &g_normals);
// http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
glBindBuffer(GL_ARRAY_BUFFER, g_normals);
// http://www.opengl.org/sdk/docs/man/xhtml/glBufferData.xml
glBufferData(GL_ARRAY_BUFFER, numberVertices * 3 * sizeof(GLfloat), (GLfloat*) normals, GL_STATIC_DRAW);
// http://www.opengl.org/sdk/docs/man/xhtml/glGenBuffers.xml
glGenBuffers(1, &g_tangents);
// http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
glBindBuffer(GL_ARRAY_BUFFER, g_tangents);
// http://www.opengl.org/sdk/docs/man/xhtml/glBufferData.xml
glBufferData(GL_ARRAY_BUFFER, numberVertices * 3 * sizeof(GLfloat), (GLfloat*) tangents, GL_STATIC_DRAW);
// http://www.opengl.org/sdk/docs/man/xhtml/glGenBuffers.xml
glGenBuffers(1, &g_texCoords);
// http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
glBindBuffer(GL_ARRAY_BUFFER, g_texCoords);
// http://www.opengl.org/sdk/docs/man/xhtml/glBufferData.xml
glBufferData(GL_ARRAY_BUFFER, numberVertices * 2 * sizeof(GLfloat), (GLfloat*) texCoords, GL_STATIC_DRAW);
// http://www.opengl.org/sdk/docs/man/xhtml/glGenBuffers.xml
glGenBuffers(1, &g_indices);
// http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indices);
// http://www.opengl.org/sdk/docs/man/xhtml/glBufferData.xml
glBufferData(GL_ELEMENT_ARRAY_BUFFER, numberIndices * sizeof(GLuint), (GLuint*) indices, GL_STATIC_DRAW);
glusLoadTgaImage("rock_color.tga", &image);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/gentextures.html
glGenTextures(1, &g_texture);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/bindtexture.html
glBindTexture(GL_TEXTURE_2D, g_texture);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/teximage2d.html
glTexImage2D(GL_TEXTURE_2D, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/texparameter.html
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/texparameter.html
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/texparameter.html
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/texparameter.html
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glusLoadTgaImage("rock_normal.tga", &image);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/gentextures.html
glGenTextures(1, &g_normalMap);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/bindtexture.html
glBindTexture(GL_TEXTURE_2D, g_normalMap);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/teximage2d.html
glTexImage2D(GL_TEXTURE_2D, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/texparameter.html
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/texparameter.html
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/texparameter.html
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/texparameter.html
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
// http://www.opengl.org/sdk/docs/man/xhtml/glUseProgram.xml
glUseProgram(g_program.program);
// Calculate the view matrix ...
glusLookAtf(g_modelView, 0.0f, 0.0f, 5.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f);
// http://www.opengl.org/sdk/docs/man/xhtml/glUniform.xml
glUniformMatrix4fv(g_modelViewLocation, 1, GL_FALSE, g_modelView);
// http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
glBindBuffer(GL_ARRAY_BUFFER, g_vertices);
// http://www.opengl.org/sdk/docs/man/xhtml/glVertexAttribPointer.xml
glVertexAttribPointer(g_vertexLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
// http://www.opengl.org/sdk/docs/man/xhtml/glEnableVertexAttribArray.xml
glEnableVertexAttribArray(g_vertexLocation);
// http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
glBindBuffer(GL_ARRAY_BUFFER, g_normals);
// http://www.opengl.org/sdk/docs/man/xhtml/glVertexAttribPointer.xml
glVertexAttribPointer(g_normalLocation, 3, GL_FLOAT, GL_FALSE, 0, 0);
// http://www.opengl.org/sdk/docs/man/xhtml/glEnableVertexAttribArray.xml
glEnableVertexAttribArray(g_normalLocation);
// http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
glBindBuffer(GL_ARRAY_BUFFER, g_tangents);
// http://www.opengl.org/sdk/docs/man/xhtml/glVertexAttribPointer.xml
glVertexAttribPointer(g_tangentLocation, 3, GL_FLOAT, GL_FALSE, 0, 0);
// http://www.opengl.org/sdk/docs/man/xhtml/glEnableVertexAttribArray.xml
glEnableVertexAttribArray(g_tangentLocation);
// http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
glBindBuffer(GL_ARRAY_BUFFER, g_texCoords);
// http://www.opengl.org/sdk/docs/man/xhtml/glVertexAttribPointer.xml
glVertexAttribPointer(g_texCoordLocation, 2, GL_FLOAT, GL_FALSE, 0, 0);
// http://www.opengl.org/sdk/docs/man/xhtml/glEnableVertexAttribArray.xml
glEnableVertexAttribArray(g_texCoordLocation);
// http://www.opengl.org/sdk/docs/man/xhtml/glUniform.xml
glUniform1i(g_textureLocation, 0);
// http://www.opengl.org/sdk/docs/man/xhtml/glActiveTexture.xml
glActiveTexture( GL_TEXTURE0);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/bindtexture.html
glBindTexture(GL_TEXTURE_2D, g_texture);
// http://www.opengl.org/sdk/docs/man/xhtml/glUniform.xml
glUniform1i(g_normalMapLocation, 1);
// http://www.opengl.org/sdk/docs/man/xhtml/glActiveTexture.xml
glActiveTexture( GL_TEXTURE1);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/bindtexture.html
glBindTexture(GL_TEXTURE_2D, g_normalMap);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/clearcolor.html
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/cleardepth.html
glClearDepth(1.0f);
//http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/enable.html
glEnable( GL_DEPTH_TEST);
//http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/enable.html
glEnable( GL_CULL_FACE);
return GLUS_TRUE;
}
int main(int argc, char* argv[])
{
GLUSchar* output;
GLUSchar* extension;
GLUSchar fileType[MAX_FILETYPE_LENGTH];
GLUSchar buffer[MAX_FILENAME_LENGTH];
GLUSint roughnessSamples;
GLUSuint exponent;
GLUSuint samples;
GLUSint i, k, m, o, p, q, x, y, ouputLength;
GLUSboolean isHDR = GLUS_FALSE;
GLUStgaimage tgaOutput[2];
GLUShdrimage hdrOutput[2];
GLUSint length;
GLUSint lengthExponent;
GLUSint stride;
GLUSfloat offset, step, roughness;
GLUSfloat startVector[3] = { 1.0f, -1.0f, -1.0f };
GLUSfloat offsetVector[3];
GLUSfloat normalVector[3];
GLUSfloat* scanVectors;
GLUSfloat* colorBufferLambert;
GLUSfloat* colorBufferCookTorrance;
GLUSfloat matrix[9];
GLUStextfile computeSource;
GLUSshaderprogram computeProgram;
GLUSuint localSize = 16;
GLUSuint textureLambert;
GLUSuint textureCookTorrance;
GLUSuint scanVectorsSSBO;
GLUSint mLocation;
GLUSint samplesLocation;
GLUSint binaryFractionFactorLocation;
GLUSint roughnessLocation;
if (argc != 11)
{
printf("Usage: Panorama2CubeMap.exe [Pos X] [Neg X] [Pos Y] [Neg Y] [Pos Z] [Neg Z] [Output] [Roughness] [Samples 2^m] [Length 2^n]\n");
return -1;
}
//
output = argv[7];
ouputLength = strlen(output);
if (ouputLength >= MAX_FILENAME_LENGTH - (MAX_FILETYPE_LENGTH - 1) - SIDE_NAMING_LENGTH - ROUGHNESS_NAMING_LENGTH - TYPE_NAMING_LENGTH)
{
printf("Error: Output filename too long.\n");
return -1;
}
roughnessSamples = atoi(argv[8]);
if (roughnessSamples < 2 || roughnessSamples >= 100)
{
printf("Error: Invalid roughness value.\n");
return -1;
}
exponent = (GLUSuint)atoi(argv[9]);
if (exponent > 16)
{
printf("Error: Invalid samples value.\n");
return -1;
}
samples = 1 << exponent;
lengthExponent = (GLUSuint)atoi(argv[10]);
if (lengthExponent > 16)
{
printf("Error: Invalid length value.\n");
return -1;
}
length = 1 << lengthExponent;
if (roughnessSamples < 2 || roughnessSamples >= 100)
{
printf("Error: Invalid roughness value.\n");
return -1;
}
//
extension = strrchr(argv[1], '.');
if (extension == 0)
{
printf("Error: No file type found.\n");
return -1;
}
if (strlen(extension) != MAX_FILETYPE_LENGTH - 1)
{
printf("Error: Invalid file type.\n");
return -1;
}
// Copy includes NULL terminating character.
for (i = 0; i < MAX_FILETYPE_LENGTH ; i++)
{
fileType[i] = tolower(extension[i]);
}
stride = 1;
printf("Loading texture cube maps ... ");
if (strcmp(fileType, ".tga") == 0)
{
//
for (i = 0; i < 6; i++)
{
if (!glusLoadTgaImage(argv[1 + i], &g_tgaimage[i]))
{
printf("failed! TGA image could not be loaded.\n");
freeTgaImages(i);
return -1;
}
if (i > 0)
{
if (g_tgaimage[0].width != g_tgaimage[i].width || g_tgaimage[0].height != g_tgaimage[i].height)
{
printf("failed! TGA images do have different dimension.\n");
freeTgaImages(i + 1);
return -1;
}
}
else
{
if (g_tgaimage[0].width != g_tgaimage[i].height)
{
printf("failed! TGA images do have different dimension.\n");
freeTgaImages(1);
return -1;
}
}
}
if (g_tgaimage[0].format == GLUS_RGB)
{
stride = 3;
}
else if (g_tgaimage[0].format == GLUS_RGBA)
{
stride = 4;
}
//
tgaOutput[0] = g_tgaimage[0];
tgaOutput[0].width = length;
tgaOutput[0].height = length;
tgaOutput[0].data = (GLUSubyte*)malloc(length * length * stride * sizeof(GLUSubyte));
if (!tgaOutput[0].data)
{
printf("failed! TGA output image could not be created.\n");
freeTgaImages(6);
return -1;
}
tgaOutput[1] = g_tgaimage[0];
tgaOutput[1].width = length;
tgaOutput[1].height = length;
tgaOutput[1].data = (GLUSubyte*)malloc(length * length * stride * sizeof(GLUSubyte));
if (!tgaOutput[1].data)
{
printf("failed! TGA output image could not be created.\n");
freeTgaImages(6);
glusDestroyTgaImage(&tgaOutput[0]);
return -1;
}
}
else if (strcmp(fileType, ".hdr") == 0)
{
isHDR = GLUS_TRUE;
for (i = 0; i < 6; i++)
{
if (!glusLoadHdrImage(argv[1 + i], &g_hdrimage[i]))
{
printf("failed! HDR image could not be loaded.\n");
freeHdrImages(i);
return -1;
}
if (i > 0)
{
if (g_hdrimage[0].width != g_hdrimage[i].width || g_hdrimage[0].height != g_hdrimage[i].height)
{
printf("failed! HDR images do have different dimension.\n");
freeHdrImages(i + 1);
return -1;
}
}
else
{
if (g_hdrimage[0].width != g_hdrimage[i].height)
{
printf("failed! HDR images do have different dimension.\n");
freeHdrImages(1);
return -1;
}
}
}
stride = 3;
//
hdrOutput[0] = g_hdrimage[0];
hdrOutput[0].width = length;
hdrOutput[0].height = length;
hdrOutput[0].data = (GLUSfloat*)malloc(length * length * stride * sizeof(GLUSfloat));
if (!hdrOutput[0].data)
{
printf("failed! HDR output image could not be created.\n");
freeHdrImages(6);
return -1;
}
hdrOutput[1] = g_hdrimage[0];
hdrOutput[1].width = length;
hdrOutput[1].height = length;
hdrOutput[1].data = (GLUSfloat*)malloc(length * length * stride * sizeof(GLUSfloat));
if (!hdrOutput[1].data)
{
printf("failed! HDR output image could not be created.\n");
freeHdrImages(6);
glusDestroyHdrImage(&hdrOutput[1]);
return -1;
}
}
else
{
printf("failed. Unknown file type.\n");
return -1;
}
printf("completed!\n");
// Contains the vectors to scan and generate one side of the pre-filtered cube map.
scanVectors = (GLUSfloat*)malloc(length * length * (3 + 1) * sizeof(GLUSfloat));
if (!scanVectors)
{
printf("Error: Scan scanVectors could not be created.\n");
freeHdrImages(6);
return -1;
}
// Color buffer needed to gather the pixels from the texture.
colorBufferLambert = (GLUSfloat*)malloc(length * length * 4 * sizeof(GLUSfloat));
if (!colorBufferLambert)
{
printf("Error: Color buffer could not be created.\n");
freeHdrImages(6);
free(scanVectors);
return -1;
}
// Color buffer needed to gather the pixels from the texture.
colorBufferCookTorrance = (GLUSfloat*)malloc(length * length * 4 * sizeof(GLUSfloat));
if (!colorBufferCookTorrance)
{
printf("Error: Color buffer could not be created.\n");
freeHdrImages(6);
free(scanVectors);
free(colorBufferLambert);
return -1;
}
//
// Initialize OpenGL, as it is needed for the compute shader.
//
glusPrepareContext(4, 3, GLUS_FORWARD_COMPATIBLE_BIT);
if (!glusCreateWindow("GLUS Example Window", 512, 512, 0, 0, GLUS_FALSE))
{
printf("Could not create window!\n");
return -1;
}
if (!glusStartup())
{
return -1;
}
//
// Compute shader for pre-filtering.
//
glusLoadTextFile("../PreFilterCubeMap/shader/prefilter.comp.glsl", &computeSource);
glusBuildComputeProgramFromSource(&computeProgram, (const GLchar**)&computeSource.text);
glusDestroyTextFile(&computeSource);
//
mLocation = glGetUniformLocation(computeProgram.program, "u_m");
samplesLocation = glGetUniformLocation(computeProgram.program, "u_samples");
binaryFractionFactorLocation = glGetUniformLocation(computeProgram.program, "u_binaryFractionFactor");
roughnessLocation = glGetUniformLocation(computeProgram.program, "u_roughness");
//
glUseProgram(computeProgram.program);
//
//
//
// Create cube maps
if (isHDR)
{
createHdrCubeMap();
freeHdrImages(6);
}
else
{
createTgaCubeMap();
freeTgaImages(6);
}
// Prepare texture, where the pre-filtered image is stored: Lambert
glGenTextures(1, &textureLambert);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, textureLambert);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F, length, length, 0, GL_RGBA, GL_FLOAT, 0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
// see binding = 1 in the shader
glBindImageTexture(1, textureLambert, 0, GL_FALSE, 0, GL_WRITE_ONLY, GL_RGBA32F);
glPixelStorei(GL_PACK_ALIGNMENT, 1);
//
// Prepare texture, where the pre-filtered image is stored: Cook-Torrance
glGenTextures(1, &textureCookTorrance);
glActiveTexture(GL_TEXTURE2);
glBindTexture(GL_TEXTURE_2D, textureCookTorrance);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F, length, length, 0, GL_RGBA, GL_FLOAT, 0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
// see binding = 2 in the shader
glBindImageTexture(2, textureCookTorrance, 0, GL_FALSE, 0, GL_WRITE_ONLY, GL_RGBA32F);
glPixelStorei(GL_PACK_ALIGNMENT, 1);
//
//
//
step = 2.0f / (GLUSfloat)length;
offset = step * 0.5f;
// Prepare save name.
strcpy(buffer, output);
buffer[ouputLength + 0] = '_';
buffer[ouputLength + 4] = '_';
buffer[ouputLength + 6] = '_';
buffer[ouputLength + 9] = '_';
for (i = ouputLength + SIDE_NAMING_LENGTH + ROUGHNESS_NAMING_LENGTH + TYPE_NAMING_LENGTH; i < ouputLength + SIDE_NAMING_LENGTH + ROUGHNESS_NAMING_LENGTH + TYPE_NAMING_LENGTH + MAX_FILETYPE_LENGTH; i++)
{
buffer[i] = fileType[i - (ouputLength + SIDE_NAMING_LENGTH + ROUGHNESS_NAMING_LENGTH + TYPE_NAMING_LENGTH)];
}
//
// Setup scan vectors buffer for compute shader.
glGenBuffers(1, &scanVectorsSSBO);
glBindBuffer(GL_SHADER_STORAGE_BUFFER, scanVectorsSSBO);
glBufferData(GL_SHADER_STORAGE_BUFFER, length * length * (3 + 1) * sizeof(GLfloat), 0, GL_DYNAMIC_DRAW);
// see binding = 3 in the shader
glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 3, scanVectorsSSBO);
// Setup m and samples for compute shader.
glUniform1ui(mLocation, exponent);
glUniform1ui(samplesLocation, samples);
// Results are in range [0.0 1.0] and not [0.0, 1.0[.
glUniform1f(binaryFractionFactorLocation, 1.0f / (powf(2.0f, (GLfloat)exponent) - 1.0f));
printf("Generating pre filtered cube maps ...\n");
for (i = 0; i < 6; i++)
{
printf("Side: %d\n", i);
switch (i)
{
case 0:
// Positive X
glusMatrix3x3Identityf(matrix);
buffer[ouputLength + 1] = 'P';
buffer[ouputLength + 2] = 'O';
buffer[ouputLength + 3] = 'S';
buffer[ouputLength + 5] = 'X';
break;
case 1:
// Negative X
glusMatrix3x3Identityf(matrix);
glusMatrix3x3RotateRyf(matrix, 180.0f);
buffer[ouputLength + 1] = 'N';
buffer[ouputLength + 2] = 'E';
buffer[ouputLength + 3] = 'G';
buffer[ouputLength + 5] = 'X';
break;
case 2:
// Positive Y
glusMatrix3x3Identityf(matrix);
glusMatrix3x3RotateRxf(matrix, 90.0f);
glusMatrix3x3RotateRyf(matrix, 90.0f);
buffer[ouputLength + 1] = 'P';
buffer[ouputLength + 2] = 'O';
buffer[ouputLength + 3] = 'S';
buffer[ouputLength + 5] = 'Y';
break;
case 3:
// Negative Y
glusMatrix3x3Identityf(matrix);
glusMatrix3x3RotateRxf(matrix, -90.0f);
glusMatrix3x3RotateRyf(matrix, 90.0f);
buffer[ouputLength + 1] = 'N';
buffer[ouputLength + 2] = 'E';
buffer[ouputLength + 3] = 'G';
buffer[ouputLength + 5] = 'Y';
break;
case 4:
// Positive Z
glusMatrix3x3Identityf(matrix);
glusMatrix3x3RotateRyf(matrix, -90.0f);
buffer[ouputLength + 1] = 'P';
buffer[ouputLength + 2] = 'O';
buffer[ouputLength + 3] = 'S';
buffer[ouputLength + 5] = 'Z';
break;
case 5:
// Negative Z
glusMatrix3x3Identityf(matrix);
glusMatrix3x3RotateRyf(matrix, 90.0f);
buffer[ouputLength + 1] = 'N';
buffer[ouputLength + 2] = 'E';
buffer[ouputLength + 3] = 'G';
buffer[ouputLength + 5] = 'Z';
break;
}
// Generate scan vectors
for (k = 0; k < length; k++)
{
for (m = 0; m < length; m++)
{
offsetVector[0] = 0.0f;
offsetVector[1] = offset + step * (GLUSfloat)k;
offsetVector[2] = offset + step * (GLUSfloat)m;
glusVector3AddVector3f(normalVector, startVector, offsetVector);
glusVector3Normalizef(normalVector);
glusMatrix3x3MultiplyVector3f(&scanVectors[k * length * (3 + 1) + m * (3 + 1)], matrix, normalVector);
}
}
// Upload scan vectors for each side.
glBufferSubData(GL_SHADER_STORAGE_BUFFER, 0, length * length * (3 + 1) * sizeof(GLfloat), scanVectors);
// For all roughness levels
for (k = 0; k < roughnessSamples; k++)
{
// Calculate roughness ...
roughness = (GLUSfloat)k * 1.0f / (GLUSfloat)(roughnessSamples - 1);
printf("Roughness: %f\n", roughness);
// ... and set it up for compute shader.
glUniform1f(roughnessLocation, roughness);
// Run the compute shader, which is doing the pre-filtering.
glDispatchCompute(length / localSize, length / localSize, 1);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, textureLambert);
if (roughness == 0.0f)
{
// Compute shader stores result in given texture.
glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_FLOAT, colorBufferLambert);
}
glActiveTexture(GL_TEXTURE2);
glBindTexture(GL_TEXTURE_2D, textureCookTorrance);
// Compute shader stores result in given texture.
glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_FLOAT, colorBufferCookTorrance);
// Resolve
for (p = 0; p < length; p++)
{
for (q = 0; q < length; q++)
{
// Some of the textures need to be stored flipped and mirrored down.
switch (i)
{
case 0:
case 1:
case 4:
case 5:
// Positive X
// Negative X
// Positive Z
// Negative Z
x = length - 1 - q;
y = length - 1 - p;
break;
case 2:
case 3:
// Positive Y
// Negative Y
x = q;
y = p;
break;
}
for (o = 0; o < stride; o++)
{
if (isHDR)
{
if (roughness == 0.0f)
{
hdrOutput[0].data[p * length * stride + q * stride + o] = colorBufferLambert[y * length * 4 + x * 4 + o];
}
hdrOutput[1].data[p * length * stride + q * stride + o] = colorBufferCookTorrance[y * length * 4 + x * 4 + o];
}
else
{
if (roughness == 0.0f)
{
tgaOutput[0].data[p * length * stride + q * stride + o] = (GLUSubyte)glusClampf(colorBufferLambert[y * length * 4 + x * 4 + o] * 255.0f, 0.0f, 255.0f);
}
tgaOutput[1].data[p * length * stride + q * stride + o] = (GLUSubyte)glusClampf(colorBufferCookTorrance[y * length * 4 + x * 4 + o] * 255.0f, 0.0f, 255.0f);
}
}
}
}
// Construct save name depending on roughness level.
buffer[ouputLength + 7] = '0' + (k / 10);
buffer[ouputLength + 8] = '0' + (k % 10);
if (isHDR)
{
if (roughness == 0.0f)
{
buffer[ouputLength + 10] = 'd';
glusSaveHdrImage(buffer, &hdrOutput[0]);
}
buffer[ouputLength + 10] = 's';
glusSaveHdrImage(buffer, &hdrOutput[1]);
}
else if (roughness == 0.0f)
{
if (roughness == 0.0f)
{
buffer[ouputLength + 10] = 'd';
glusSaveTgaImage(buffer, &tgaOutput[0]);
}
buffer[ouputLength + 10] = 's';
glusSaveTgaImage(buffer, &tgaOutput[1]);
}
}
}
printf("completed!\n");
//
// Freeing resources
//
free(scanVectors);
free(colorBufferLambert);
free(colorBufferCookTorrance);
glusDestroyProgram(&computeProgram);
glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
if (g_cubemap)
{
glDeleteTextures(1, &g_cubemap);
g_cubemap = 0;
}
glBindTexture(GL_TEXTURE_2D, 0);
if (textureLambert)
{
glDeleteTextures(1, &textureLambert);
textureLambert = 0;
}
if (textureCookTorrance)
{
glDeleteTextures(1, &textureCookTorrance);
textureCookTorrance = 0;
}
if (isHDR)
{
glusDestroyHdrImage(&hdrOutput[0]);
glusDestroyHdrImage(&hdrOutput[1]);
}
else
{
glusDestroyTgaImage(&tgaOutput[0]);
glusDestroyTgaImage(&tgaOutput[1]);
}
glBindBuffer(GL_SHADER_STORAGE_BUFFER, 0);
if (scanVectorsSSBO)
{
glDeleteBuffers(1, &scanVectorsSSBO);
scanVectorsSSBO = 0;
}
//
// Shutdown OpenGL.
//
glusShutdown();
return 0;
}
/**
* Function for initialization.
*/
GLUSboolean init(GLUSvoid)
{
// Points of a triangle.
GLfloat* points = (GLfloat*)malloc(WATER_PLANE_LENGTH*WATER_PLANE_LENGTH*4*sizeof(GLfloat));
GLuint* indices = (GLuint*)malloc(WATER_PLANE_LENGTH*(WATER_PLANE_LENGTH-1)*2*sizeof(GLuint));
GLUSshape background;
GLUStgaimage image;
GLUStextfile vertexSource;
GLUStextfile fragmentSource;
GLuint x, z, i, k;
GLuint waterTexture;
for (z = 0; z < WATER_PLANE_LENGTH; z++)
{
for (x = 0; x < WATER_PLANE_LENGTH; x++)
{
points[(x+z*(WATER_PLANE_LENGTH))*4 + 0] = -(GLfloat)WATER_PLANE_LENGTH/2 + 0.5f + (GLfloat)x;
points[(x+z*(WATER_PLANE_LENGTH))*4 + 1] = 0.0f;
points[(x+z*(WATER_PLANE_LENGTH))*4 + 2] = +(GLfloat)WATER_PLANE_LENGTH/2 - 0.5f - (GLfloat)z;
points[(x+z*(WATER_PLANE_LENGTH))*4 + 3] = 1.0f;
}
}
for (k = 0; k < WATER_PLANE_LENGTH-1; k++)
{
for (i = 0; i < WATER_PLANE_LENGTH; i++)
{
if (k%2 == 0)
{
indices[(i+k*(WATER_PLANE_LENGTH))*2 + 0] = i + k*WATER_PLANE_LENGTH;
indices[(i+k*(WATER_PLANE_LENGTH))*2 + 1] = i + (k+1)*WATER_PLANE_LENGTH;
}
else
{
indices[(i+k*(WATER_PLANE_LENGTH))*2 + 0] = WATER_PLANE_LENGTH - 1 - i + k*WATER_PLANE_LENGTH;
indices[(i+k*(WATER_PLANE_LENGTH))*2 + 1] = WATER_PLANE_LENGTH - 1 - i + (k+1)*WATER_PLANE_LENGTH;
}
}
}
// Load the source of the vertex shader.
glusLoadTextFile("../src/Example14/Vertex.vs", &vertexSource);
// Load the source of the fragment shader.
glusLoadTextFile("../src/Example14/Fragment.fs", &fragmentSource);
// Build and ...
glusBuildProgram(&g_program, (const GLUSchar**) &vertexSource.text, 0, 0, 0, (const GLUSchar**) &fragmentSource.text);
// Destroy the text resource
glusDestroyTextFile(&vertexSource);
// Destroy the text resource
glusDestroyTextFile(&fragmentSource);
// ToDo:
glGenVertexArrays(1, &g_vao);
// ToDo:
glBindVertexArray(g_vao);
// http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformLocation.xml
g_projectionLocation = glGetUniformLocation(g_program.program, "projectionMatrix");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformLocation.xml
g_modelViewLocation = glGetUniformLocation(g_program.program, "modelViewMatrix");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformLocation.xml
g_waterPlaneLengthLocation = glGetUniformLocation(g_program.program, "waterPlaneLength");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformLocation.xml
g_inverseCameraLocation = glGetUniformLocation(g_program.program, "inverseCameraMatrix");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformLocation.xml
g_cubemapLocation = glGetUniformLocation(g_program.program, "cubemap");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformLocation.xml
g_waterLocation = glGetUniformLocation(g_program.program, "waterTexture");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformLocation.xml
g_passedTimeLocation = glGetUniformLocation(g_program.program, "passedTime");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformLocation.xml
g_waveParametersLocation = glGetUniformLocation(g_program.program, "waveParameters");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformLocation.xml
g_waveDirectionsLocation = glGetUniformLocation(g_program.program, "waveDirections");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetAttribLocation.xml
g_vertexLocation = glGetAttribLocation(g_program.program, "vertex");
// http://www.opengl.org/sdk/docs/man/xhtml/glGenBuffers.xml
glGenBuffers(1, &g_vertices);
// http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
glBindBuffer(GL_ARRAY_BUFFER, g_vertices);
// http://www.opengl.org/sdk/docs/man/xhtml/glBufferData.xml
glBufferData(GL_ARRAY_BUFFER, WATER_PLANE_LENGTH*WATER_PLANE_LENGTH * 4 * sizeof(GLfloat), (GLfloat*) points, GL_STATIC_DRAW);
// http://www.opengl.org/sdk/docs/man/xhtml/glGenBuffers.xml
glGenBuffers(1, &g_indices);
// http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indices);
// http://www.opengl.org/sdk/docs/man/xhtml/glBufferData.xml
glBufferData(GL_ELEMENT_ARRAY_BUFFER, WATER_PLANE_LENGTH*(WATER_PLANE_LENGTH-1) * 2 * sizeof(GLuint), (GLuint*) indices, GL_STATIC_DRAW);
//
free(points);
free(indices);
//
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/gentextures.html
glGenTextures(1, &g_cubemap);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/bindtexture.html
glBindTexture(GL_TEXTURE_CUBE_MAP, g_cubemap);
glusLoadTgaImage("water_pos_x.tga", &image);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/teximage2d.html
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
glusLoadTgaImage("water_neg_x.tga", &image);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/teximage2d.html
glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_X, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
glusLoadTgaImage("water_pos_y.tga", &image);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/teximage2d.html
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_Y, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
glusLoadTgaImage("water_neg_y.tga", &image);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/teximage2d.html
glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_Y, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
glusLoadTgaImage("water_pos_z.tga", &image);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/teximage2d.html
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_Z, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
glusLoadTgaImage("water_neg_z.tga", &image);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/teximage2d.html
glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_Z, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/texparameter.html
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/texparameter.html
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/texparameter.html
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/texparameter.html
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
//
// http://www.opengl.org/sdk/docs/man/xhtml/glUseProgram.xml
glUseProgram(g_program.program);
// http://www.opengl.org/sdk/docs/man/xhtml/glUniform.xml
glUniform1f(g_waterPlaneLengthLocation, (GLUSfloat)WATER_PLANE_LENGTH);
// http://www.opengl.org/sdk/docs/man/xhtml/glVertexAttribPointer.xml
glVertexAttribPointer(g_vertexLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
// http://www.opengl.org/sdk/docs/man/xhtml/glEnableVertexAttribArray.xml
glEnableVertexAttribArray(g_vertexLocation);
// http://www.opengl.org/sdk/docs/man/xhtml/glActiveTexture.xml
glActiveTexture(GL_TEXTURE0);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/bindtexture.html
glBindTexture(GL_TEXTURE_CUBE_MAP, g_cubemap);
// http://www.opengl.org/sdk/docs/man/xhtml/glUniform.xml
glUniform1i(g_cubemapLocation, 0);
// Get the render buffer texture
waterTexture = initTexture((GLUSfloat)WATER_PLANE_LENGTH);
// http://www.opengl.org/sdk/docs/man/xhtml/glUseProgram.xml
glUseProgram(g_program.program);
// http://www.opengl.org/sdk/docs/man/xhtml/glActiveTexture.xml
glActiveTexture(GL_TEXTURE1);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/bindtexture.html
glBindTexture(GL_TEXTURE_2D, waterTexture);
// http://www.opengl.org/sdk/docs/man/xhtml/glUniform.xml
glUniform1i(g_waterLocation, 1);
//
// Load the source of the vertex shader.
glusLoadTextFile("../src/Example14/VertexBackground.vs", &vertexSource);
// Load the source of the fragment shader.
glusLoadTextFile("../src/Example14/FragmentBackground.fs", &fragmentSource);
// Build and ...
glusBuildProgram(&g_programBackground, (const GLUSchar**) &vertexSource.text, 0, 0, 0, (const GLUSchar**) &fragmentSource.text);
// Destroy the text resource
glusDestroyTextFile(&vertexSource);
// Destroy the text resource
glusDestroyTextFile(&fragmentSource);
// ToDo:
glGenVertexArrays(1, &g_vaoBackground);
// ToDo:
glBindVertexArray(g_vaoBackground);
glusCreateSpheref(&background, (GLfloat)(GLfloat)WATER_PLANE_LENGTH/2.0f + 0.5f, 32);
g_numberIndicesBackground = background.numberIndices;
// http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformLocation.xml
g_projectionLocationBackground = glGetUniformLocation(g_programBackground.program, "projectionMatrix");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformLocation.xml
g_modelViewLocationBackground = glGetUniformLocation(g_programBackground.program, "modelViewMatrix");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformLocation.xml
g_cubemapLocationBackground = glGetUniformLocation(g_programBackground.program, "cubemap");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetAttribLocation.xml
g_vertexLocationBackground = glGetAttribLocation(g_programBackground.program, "vertex");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetAttribLocation.xml
g_normalLocationBackground = glGetAttribLocation(g_programBackground.program, "normal");
// http://www.opengl.org/sdk/docs/man/xhtml/glGenBuffers.xml
glGenBuffers(1, &g_verticesBackground);
// http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
glBindBuffer(GL_ARRAY_BUFFER, g_verticesBackground);
// http://www.opengl.org/sdk/docs/man/xhtml/glBufferData.xml
glBufferData(GL_ARRAY_BUFFER, background.numberVertices * 4 * sizeof(GLfloat), (GLfloat*) background.vertices, GL_STATIC_DRAW);
// http://www.opengl.org/sdk/docs/man/xhtml/glGenBuffers.xml
glGenBuffers(1, &g_normalsBackground);
// http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
glBindBuffer(GL_ARRAY_BUFFER, g_normalsBackground);
// http://www.opengl.org/sdk/docs/man/xhtml/glBufferData.xml
glBufferData(GL_ARRAY_BUFFER, background.numberVertices * 3 * sizeof(GLfloat), (GLfloat*) background.normals, GL_STATIC_DRAW);
// http://www.opengl.org/sdk/docs/man/xhtml/glGenBuffers.xml
glGenBuffers(1, &g_indicesBackground);
// http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesBackground);
// http://www.opengl.org/sdk/docs/man/xhtml/glBufferData.xml
glBufferData(GL_ELEMENT_ARRAY_BUFFER, background.numberIndices * sizeof(GLuint), (GLuint*) background.indices, GL_STATIC_DRAW);
glusDestroyShapef(&background);
// http://www.opengl.org/sdk/docs/man/xhtml/glUseProgram.xml
glUseProgram(g_programBackground.program);
// http://www.opengl.org/sdk/docs/man/xhtml/glUniform.xml
glUniformMatrix4fv(g_modelViewLocationBackground, 1, GL_FALSE, g_modelView);
// http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
glBindBuffer(GL_ARRAY_BUFFER, g_verticesBackground);
// http://www.opengl.org/sdk/docs/man/xhtml/glVertexAttribPointer.xml
glVertexAttribPointer(g_vertexLocationBackground, 4, GL_FLOAT, GL_FALSE, 0, 0);
// http://www.opengl.org/sdk/docs/man/xhtml/glEnableVertexAttribArray.xml
glEnableVertexAttribArray(g_vertexLocationBackground);
// http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
glBindBuffer(GL_ARRAY_BUFFER, g_normalsBackground);
// http://www.opengl.org/sdk/docs/man/xhtml/glVertexAttribPointer.xml
glVertexAttribPointer(g_normalLocationBackground, 3, GL_FLOAT, GL_FALSE, 0, 0);
// http://www.opengl.org/sdk/docs/man/xhtml/glEnableVertexAttribArray.xml
glEnableVertexAttribArray(g_normalLocationBackground);
// http://www.opengl.org/sdk/docs/man/xhtml/glUniform.xml
glUniform1i(g_cubemapLocationBackground, 0);
//
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/clearcolor.html
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/cleardepth.html
glClearDepth(1.0f);
//http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/enable.html
glEnable( GL_DEPTH_TEST);
return GLUS_TRUE;
}
/**
* Function for initialization.
*/
GLUSboolean init(GLUSvoid)
{
// Points for referencing each texel
GLfloat points[PARTICLES_LOOKUP_WIDTH*PARTICLES_LOOKUP_WIDTH*2];
// Initial particle data
GLfloat particle[PARTICLES_LOOKUP_WIDTH*PARTICLES_LOOKUP_WIDTH*4];
GLUStgaimage image;
GLUStextfile vertexSource;
GLUStextfile fragmentSource;
GLuint x, y;
// Create points which are refernceing on the different texels
for (y = 0; y < PARTICLES_LOOKUP_WIDTH; y++)
{
for (x = 0; x < PARTICLES_LOOKUP_WIDTH; x++)
{
points[x*2+0 + y*PARTICLES_LOOKUP_WIDTH*2] = (GLfloat)x/(GLfloat)PARTICLES_LOOKUP_WIDTH;
points[x*2+1 + y*PARTICLES_LOOKUP_WIDTH*2] = (GLfloat)y/(GLfloat)PARTICLES_LOOKUP_WIDTH;
}
}
// Create the initial particles data
for (y = 0; y < PARTICLES_LOOKUP_WIDTH; y++)
{
for (x = 0; x < PARTICLES_LOOKUP_WIDTH; x++)
{
particle[x*4+0 + y*PARTICLES_LOOKUP_WIDTH*4] = 0.0f;
particle[x*4+1 + y*PARTICLES_LOOKUP_WIDTH*4] = 0.0f;
particle[x*4+2 + y*PARTICLES_LOOKUP_WIDTH*4] = 0.0f;
particle[x*4+3 + y*PARTICLES_LOOKUP_WIDTH*4] = (rand()%101)/100.0f;
}
}
// Load the source of the vertex shader.
glusLoadTextFile("../Example08/Vertex.vs", &vertexSource);
// Load the source of the fragment shader.
glusLoadTextFile("../Example08/Fragment.fs", &fragmentSource);
// Build and ...
glusBuildProgram(&g_program, (const GLUSchar**)&vertexSource.text, 0, (const GLUSchar**)&fragmentSource.text);
// Destroy the text resource
glusDestroyTextFile(&vertexSource);
// Destroy the text resource
glusDestroyTextFile(&fragmentSource);
// ToDo:
glGenVertexArrays(1, &g_vao);
// ToDo:
glBindVertexArray(g_vao);
// http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformLocation.xml
g_projectionLocation = glGetUniformLocation(g_program.program, "projectionMatrix");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformLocation.xml
g_modelViewLocation = glGetUniformLocation(g_program.program, "modelViewMatrix");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformLocation.xml
g_textureLocation = glGetUniformLocation(g_program.program, "firstTexture");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformLocation.xml
g_lookuptextureLocation = glGetUniformLocation(g_program.program, "readTexture");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetAttribLocation.xml
g_vertexLocation = glGetAttribLocation(g_program.program, "vertex");
// ToDo:
glBindFragDataLocation(g_program.program, 0, "fragColor");
// Load the source of the vertex shader.
glusLoadTextFile("../Example08/UpdatePoints.vs", &vertexSource);
// Load the source of the fragment shader.
glusLoadTextFile("../Example08/UpdatePoints.fs", &fragmentSource);
// Build and ...
glusBuildProgram(&g_programUpdate, (const GLUSchar**)&vertexSource.text, 0, (const GLUSchar**)&fragmentSource.text);
// Destroy the text resource
glusDestroyTextFile(&vertexSource);
// Destroy the text resource
glusDestroyTextFile(&fragmentSource);
// http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformLocation.xml
g_lookuptextureLocationUpdate = glGetUniformLocation(g_programUpdate.program, "readTexture");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformLocation.xml
g_sizeLocation = glGetUniformLocation(g_programUpdate.program, "size");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformLocation.xml
g_timeLocation = glGetUniformLocation(g_programUpdate.program, "time");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetAttribLocation.xml
g_vertexLocationUpdate = glGetAttribLocation(g_programUpdate.program, "vertex");
// ToDo:
glBindFragDataLocation(g_programUpdate.program, 0, "fragParticle");
// http://www.opengl.org/sdk/docs/man/xhtml/glGenBuffers.xml
glGenBuffers(1, &g_vertices);
// http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
glBindBuffer(GL_ARRAY_BUFFER, g_vertices);
// http://www.opengl.org/sdk/docs/man/xhtml/glBufferData.xml
glBufferData(GL_ARRAY_BUFFER, PARTICLES_LOOKUP_WIDTH*PARTICLES_LOOKUP_WIDTH*2*sizeof(GLfloat), (GLfloat*)points, GL_STATIC_DRAW);
glusLoadTgaImage("particle.tga", &image);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/gentextures.html
glGenTextures(1, &g_texture);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/bindtexture.html
glBindTexture(GL_TEXTURE_2D, g_texture);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/teximage2d.html
glTexImage2D(GL_TEXTURE_2D, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/texparameter.html
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/texparameter.html
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/texparameter.html
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/texparameter.html
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/gentextures.html
glGenTextures(2, g_lookuptexture);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/bindtexture.html
glBindTexture(GL_TEXTURE_2D, g_lookuptexture[0]);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/teximage2d.html
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F, PARTICLES_LOOKUP_WIDTH, PARTICLES_LOOKUP_WIDTH, 0, GL_RGBA, GL_FLOAT, particle);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/texparameter.html
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/texparameter.html
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/texparameter.html
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/texparameter.html
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/bindtexture.html
glBindTexture(GL_TEXTURE_2D, g_lookuptexture[1]);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/teximage2d.html
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F, PARTICLES_LOOKUP_WIDTH, PARTICLES_LOOKUP_WIDTH, 0, GL_RGBA, GL_FLOAT, particle);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/texparameter.html
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/texparameter.html
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/texparameter.html
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/texparameter.html
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
// ToDo:
glGenFramebuffers(2, g_lookupframebuffer);
// ToDo:
glBindFramebuffer(GL_FRAMEBUFFER, g_lookupframebuffer[0]);
// ToDo:
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, g_lookuptexture[0], 0);
// ToDo:
glBindFramebuffer(GL_FRAMEBUFFER, g_lookupframebuffer[1]);
// ToDo:
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, g_lookuptexture[1], 0);
// http://www.opengl.org/sdk/docs/man/xhtml/glUseProgram.xml
glUseProgram(g_program.program);
// Calculate the view matrix ...
glusLookAtf(g_modelView, 0.0f, 0.0f, 5.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f);
// http://www.opengl.org/sdk/docs/man/xhtml/glUniform.xml
glUniformMatrix4fv(g_modelViewLocation, 1, GL_FALSE, g_modelView);
// http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
glBindBuffer(GL_ARRAY_BUFFER, g_vertices);
// http://www.opengl.org/sdk/docs/man/xhtml/glVertexAttribPointer.xml
glVertexAttribPointer(g_vertexLocation, 2, GL_FLOAT, GL_FALSE, 0, 0);
// http://www.opengl.org/sdk/docs/man/xhtml/glEnableVertexAttribArray.xml
glEnableVertexAttribArray(g_vertexLocation);
// http://www.opengl.org/sdk/docs/man/xhtml/glUniform.xml
glUniform1i(g_textureLocation, 0);
// http://www.opengl.org/sdk/docs/man/xhtml/glActiveTexture.xml
glActiveTexture(GL_TEXTURE0);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/bindtexture.html
glBindTexture(GL_TEXTURE_2D, g_texture);
// http://www.opengl.org/sdk/docs/man/xhtml/glUseProgram.xml
glUseProgram(g_programUpdate.program);
// http://www.opengl.org/sdk/docs/man/xhtml/glUniform.xml
glUniform1f(g_sizeLocation, (GLfloat)PARTICLES_LOOKUP_WIDTH);
// http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
glBindBuffer(GL_ARRAY_BUFFER, g_vertices);
// http://www.opengl.org/sdk/docs/man/xhtml/glVertexAttribPointer.xml
glVertexAttribPointer(g_vertexLocationUpdate, 2, GL_FLOAT, GL_FALSE, 0, 0);
// http://www.opengl.org/sdk/docs/man/xhtml/glEnableVertexAttribArray.xml
glEnableVertexAttribArray(g_vertexLocationUpdate);
// http://www.opengl.org/sdk/docs/man/xhtml/glUseProgram.xml
glUseProgram(g_program.program);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/clearcolor.html
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/enable.html
glEnable(GL_VERTEX_PROGRAM_POINT_SIZE);
return GLUS_TRUE;
}
GLUSboolean init(GLUSvoid)
{
GLfloat* points = (GLfloat*) malloc(WATER_PLANE_LENGTH * WATER_PLANE_LENGTH * 4 * sizeof(GLfloat));
GLuint* indices = (GLuint*) malloc(WATER_PLANE_LENGTH * (WATER_PLANE_LENGTH - 1) * 2 * sizeof(GLuint));
GLUStgaimage image;
GLUStextfile vertexSource;
GLUStextfile fragmentSource;
GLuint x, z, i, k;
GLuint waterTexture;
for (z = 0; z < WATER_PLANE_LENGTH; z++)
{
for (x = 0; x < WATER_PLANE_LENGTH; x++)
{
points[(x + z * (WATER_PLANE_LENGTH)) * 4 + 0] = -(GLfloat) WATER_PLANE_LENGTH / 2 + 0.5f + (GLfloat) x;
points[(x + z * (WATER_PLANE_LENGTH)) * 4 + 1] = 0.0f;
points[(x + z * (WATER_PLANE_LENGTH)) * 4 + 2] = +(GLfloat) WATER_PLANE_LENGTH / 2 - 0.5f - (GLfloat) z;
points[(x + z * (WATER_PLANE_LENGTH)) * 4 + 3] = 1.0f;
}
}
for (k = 0; k < WATER_PLANE_LENGTH - 1; k++)
{
for (i = 0; i < WATER_PLANE_LENGTH; i++)
{
if (k % 2 == 0)
{
indices[(i + k * (WATER_PLANE_LENGTH)) * 2 + 0] = i + (k + 1) * WATER_PLANE_LENGTH;
indices[(i + k * (WATER_PLANE_LENGTH)) * 2 + 1] = i + k * WATER_PLANE_LENGTH;
}
else
{
indices[(i + k * (WATER_PLANE_LENGTH)) * 2 + 0] = WATER_PLANE_LENGTH - 1 - i + k * WATER_PLANE_LENGTH;
indices[(i + k * (WATER_PLANE_LENGTH)) * 2 + 1] = WATER_PLANE_LENGTH - 1 - i + (k + 1) * WATER_PLANE_LENGTH;
}
}
}
//
glusLoadTextFile("../Example15/shader/Water.vert.glsl", &vertexSource);
glusLoadTextFile("../Example15/shader/Water.frag.glsl", &fragmentSource);
glusBuildProgramFromSource(&g_program, (const GLUSchar**) &vertexSource.text, 0, 0, 0, (const GLUSchar**) &fragmentSource.text);
glusDestroyTextFile(&vertexSource);
glusDestroyTextFile(&fragmentSource);
//
g_projectionMatrixLocation = glGetUniformLocation(g_program.program, "u_projectionMatrix");
g_viewMatrixLocation = glGetUniformLocation(g_program.program, "u_viewMatrix");
g_inverseViewNormalMatrixLocation = glGetUniformLocation(g_program.program, "u_inverseViewNormalMatrix");
g_waterPlaneLengthLocation = glGetUniformLocation(g_program.program, "u_waterPlaneLength");
g_cubemapLocation = glGetUniformLocation(g_program.program, "u_cubemap");
g_waterTextureLocation = glGetUniformLocation(g_program.program, "u_waterTexture");
g_passedTimeLocation = glGetUniformLocation(g_program.program, "u_passedTime");
g_waveParametersLocation = glGetUniformLocation(g_program.program, "u_waveParameters");
g_waveDirectionsLocation = glGetUniformLocation(g_program.program, "u_waveDirections");
g_vertexLocation = glGetAttribLocation(g_program.program, "a_vertex");
//
glGenBuffers(1, &g_verticesVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
glBufferData(GL_ARRAY_BUFFER, WATER_PLANE_LENGTH * WATER_PLANE_LENGTH * 4 * sizeof(GLfloat), (GLfloat*) points, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glGenBuffers(1, &g_indicesVBO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesVBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, WATER_PLANE_LENGTH * (WATER_PLANE_LENGTH - 1) * 2 * sizeof(GLuint), (GLuint*) indices, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
//
free(points);
free(indices);
//
glGenTextures(1, &g_cubemap);
glBindTexture(GL_TEXTURE_CUBE_MAP, g_cubemap);
glusLoadTgaImage("water_pos_x.tga", &image);
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
glusLoadTgaImage("water_neg_x.tga", &image);
glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_X, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
glusLoadTgaImage("water_pos_y.tga", &image);
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_Y, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
glusLoadTgaImage("water_neg_y.tga", &image);
glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_Y, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
glusLoadTgaImage("water_pos_z.tga", &image);
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_Z, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
glusLoadTgaImage("water_neg_z.tga", &image);
glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_Z, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
//
waterTexture = initWaterTexture((GLUSfloat) WATER_PLANE_LENGTH);
glUseProgram(g_program.program);
glUniform1f(g_waterPlaneLengthLocation, (GLUSfloat) WATER_PLANE_LENGTH);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_CUBE_MAP, g_cubemap);
glUniform1i(g_cubemapLocation, 0);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, waterTexture);
glUniform1i(g_waterTextureLocation, 1);
glGenVertexArrays(1, &g_vao);
glBindVertexArray(g_vao);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
glVertexAttribPointer(g_vertexLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_vertexLocation);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesVBO);
//
initBackground();
//
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClearDepth(1.0f);
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
return GLUS_TRUE;
}
int main(int argc, char* argv[])
{
GLUStgaimage tgaimage;
FILE* file;
GLUSint i, k, stride;
GLUSchar* format;
GLUSchar* filename;
GLUSchar uppercaseFilename[256];
//
if (argc != 3)
{
printf("Usage: TGA2Header.exe [TGA Filename] [Header Filename]\n");
return -1;
}
//
printf("Loading '%s' ... ", argv[1]);
if (!glusLoadTgaImage(argv[1], &tgaimage))
{
printf("failed! TGA image could not be loaded.\n");
return -1;
}
printf("completed!\n");
//
if (tgaimage.depth > 1)
{
printf("failed! Only 2D images are supported.\n");
glusDestroyTgaImage(&tgaimage);
return -1;
}
//
stride = 1;
format = "GL_LUMINANCE";
if (tgaimage.format == GLUS_RGB)
{
stride = 3;
format = "GL_RGB";
}
else if (tgaimage.format == GLUS_RGBA)
{
stride = 4;
format = "GL_RGBA";
}
//
printf("Saving '%s' ... ", argv[2]);
file = fopen(argv[2], "w");
if (!file)
{
printf("failed! Could not create/open header file.\n");
glusDestroyTgaImage(&tgaimage);
return -1;
}
filename = strtok(argv[2], ".");
if (!filename || strlen(filename) >= 255)
{
printf("failed! Invalid filename.\n");
fclose(file);
glusDestroyTgaImage(&tgaimage);
return -1;
}
for (i = 0; i < strlen(filename); i++)
{
uppercaseFilename[i] = toupper(filename[i]);
}
uppercaseFilename[i] = '\0';
//
fprintf(file, "#ifndef %s_TGA_HEADER\n", uppercaseFilename);
fprintf(file, "#define %s_TGA_HEADER\n\n", uppercaseFilename);
fprintf(file, "static GLint %s_width = %d;\n", filename, tgaimage.width);
fprintf(file, "static GLint %s_height = %d;\n\n", filename, tgaimage.height);
fprintf(file, "static GLenum %s_format = %s;\n\n", filename, format);
fprintf(file, "static GLubyte %s_pixels[] = {\n", filename);
for (i = 0; i < tgaimage.width * tgaimage.height; i++)
{
for (k = 0; k < stride; k++)
{
fprintf(file, "%d", tgaimage.data[i * stride + k]);
if (i * stride + k < tgaimage.width * tgaimage.height * stride - 1)
{
fprintf(file, ",");
}
}
fprintf(file, "\n");
}
fprintf(file, "};\n\n");
fprintf(file, "#endif // %s_TGA_HEADER\n", uppercaseFilename);
//
fclose(file);
printf("completed!\n");
//
glusDestroyTgaImage(&tgaimage);
return 0;
}
/**
* Function for initialization.
*/
GLUSboolean init(GLUSvoid)
{
// Points of a cube.
GLfloat
points[] =
{ -0.5f, -0.5f, -0.5f, 1.0f, -0.5f, -0.5f, +0.5f, 1.0f, +0.5f, -0.5f, +0.5f, 1.0f, +0.5f, -0.5f, -0.5f, 1.0f, -0.5f, +0.5f, -0.5f, 1.0f, -0.5f, +0.5f, +0.5f, 1.0f, +0.5f, +0.5f, +0.5f, 1.0f, +0.5f, +0.5f, -0.5f, 1.0f, -0.5f, -0.5f, -0.5f, 1.0f, -0.5f, +0.5f, -0.5f, 1.0f, +0.5f, +0.5f, -0.5f, 1.0f, +0.5f, -0.5f, -0.5f, 1.0f, -0.5f, -0.5f, +0.5f, 1.0f, -0.5f, +0.5f, +0.5f, 1.0f, +0.5f, +0.5f, +0.5f, 1.0f, +0.5f, -0.5f, +0.5f, 1.0f, -0.5f, -0.5f, -0.5f, 1.0f, -0.5f, -0.5f, +0.5f, 1.0f, -0.5f, +0.5f, +0.5f, 1.0f, -0.5f, +0.5f, -0.5f, 1.0f, +0.5f, -0.5f, -0.5f, 1.0f, +0.5f, -0.5f, +0.5f, 1.0f, +0.5f, +0.5f, +0.5f, 1.0f, +0.5f, +0.5f, -0.5f, 1.0f };
// Normals of a cube.
GLfloat
normals[] =
{ +0.0f, -1.0f, +0.0f, +0.0f, -1.0f, +0.0f, +0.0f, -1.0f, +0.0f, +0.0f, -1.0f, +0.0f, +0.0f, +1.0f, +0.0f, +0.0f, +1.0f, +0.0f, +0.0f, +1.0f, +0.0f, +0.0f, +1.0f, +0.0f, +0.0f, +0.0f, -1.0f, +0.0f, +0.0f, -1.0f, +0.0f, +0.0f, -1.0f, +0.0f, +0.0f, -1.0f, +0.0f, +0.0f, +1.0f, +0.0f, +0.0f, +1.0f, +0.0f, +0.0f, +1.0f, +0.0f, +0.0f, +1.0f, -1.0f, +0.0f, +0.0f, -1.0f, +0.0f, +0.0f, -1.0f, +0.0f, +0.0f, -1.0f, +0.0f, +0.0f, +1.0f, +0.0f, +0.0f, +1.0f, +0.0f, +0.0f, +1.0f, +0.0f, +0.0f, +1.0f, +0.0f, +0.0f };
// The associated indices.
GLuint indices[] = { 0, 2, 1, 0, 3, 2, 4, 5, 6, 4, 6, 7, 8, 9, 10, 8, 10, 11, 12, 15, 14, 12, 14, 13, 16, 17, 18, 16, 18, 19, 20, 23, 22, 20, 22, 21 };
GLUStgaimage image;
GLUStextfile vertexSource;
GLUStextfile fragmentSource;
// Load the source of the vertex shader.
glusLoadTextFile("../src/Example07/Vertex.vs", &vertexSource);
// Load the source of the fragment shader.
glusLoadTextFile("../src/Example07/Fragment.fs", &fragmentSource);
// Build and ...
glusBuildProgram(&g_program, (const GLUSchar**) &vertexSource.text, 0, 0, 0, (const GLUSchar**) &fragmentSource.text);
// Destroy the text resource
glusDestroyTextFile(&vertexSource);
// Destroy the text resource
glusDestroyTextFile(&fragmentSource);
// ToDo:
glGenVertexArrays(1, &g_vao);
// ToDo:
glBindVertexArray(g_vao);
// http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformLocation.xml
g_projectionLocation = glGetUniformLocation(g_program.program, "projectionMatrix");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformLocation.xml
g_modelViewLocation = glGetUniformLocation(g_program.program, "modelViewMatrix");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformLocation.xml
g_inverseCameraLocation = glGetUniformLocation(g_program.program, "inverseCameraMatrix");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformLocation.xml
g_cubemapLocation = glGetUniformLocation(g_program.program, "cubemap");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetAttribLocation.xml
g_vertexLocation = glGetAttribLocation(g_program.program, "vertex");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetAttribLocation.xml
g_normalLocation = glGetAttribLocation(g_program.program, "normal");
// http://www.opengl.org/sdk/docs/man/xhtml/glGenBuffers.xml
glGenBuffers(1, &g_vertices);
// http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
glBindBuffer(GL_ARRAY_BUFFER, g_vertices);
// http://www.opengl.org/sdk/docs/man/xhtml/glBufferData.xml
glBufferData(GL_ARRAY_BUFFER, 24 * 4 * sizeof(GLfloat), (GLfloat*) points, GL_STATIC_DRAW);
// http://www.opengl.org/sdk/docs/man/xhtml/glGenBuffers.xml
glGenBuffers(1, &g_normals);
// http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
glBindBuffer(GL_ARRAY_BUFFER, g_normals);
// http://www.opengl.org/sdk/docs/man/xhtml/glBufferData.xml
glBufferData(GL_ARRAY_BUFFER, 24 * 3 * sizeof(GLfloat), (GLfloat*) normals, GL_STATIC_DRAW);
// http://www.opengl.org/sdk/docs/man/xhtml/glGenBuffers.xml
glGenBuffers(1, &g_indices);
// http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indices);
// http://www.opengl.org/sdk/docs/man/xhtml/glBufferData.xml
glBufferData(GL_ELEMENT_ARRAY_BUFFER, 6 * 2 * 3 * sizeof(GLuint), (GLuint*) indices, GL_STATIC_DRAW);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/gentextures.html
glGenTextures(1, &g_cubemap);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/bindtexture.html
glBindTexture(GL_TEXTURE_CUBE_MAP, g_cubemap);
glusLoadTgaImage("cm_left.tga", &image);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/teximage2d.html
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
glusLoadTgaImage("cm_right.tga", &image);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/teximage2d.html
glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_X, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
glusLoadTgaImage("cm_top.tga", &image);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/teximage2d.html
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_Y, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
glusLoadTgaImage("cm_bottom.tga", &image);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/teximage2d.html
glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_Y, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
glusLoadTgaImage("cm_back.tga", &image);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/teximage2d.html
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_Z, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
glusLoadTgaImage("cm_front.tga", &image);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/teximage2d.html
glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_Z, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/texparameter.html
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/texparameter.html
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/texparameter.html
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_REPEAT);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/texparameter.html
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_REPEAT);
// http://www.opengl.org/sdk/docs/man/xhtml/glUseProgram.xml
glUseProgram(g_program.program);
// http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
glBindBuffer(GL_ARRAY_BUFFER, g_vertices);
// http://www.opengl.org/sdk/docs/man/xhtml/glVertexAttribPointer.xml
glVertexAttribPointer(g_vertexLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
// http://www.opengl.org/sdk/docs/man/xhtml/glEnableVertexAttribArray.xml
glEnableVertexAttribArray(g_vertexLocation);
// http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
glBindBuffer(GL_ARRAY_BUFFER, g_normals);
// http://www.opengl.org/sdk/docs/man/xhtml/glVertexAttribPointer.xml
glVertexAttribPointer(g_normalLocation, 3, GL_FLOAT, GL_FALSE, 0, 0);
// http://www.opengl.org/sdk/docs/man/xhtml/glEnableVertexAttribArray.xml
glEnableVertexAttribArray(g_normalLocation);
// http://www.opengl.org/sdk/docs/man/xhtml/glUniform.xml
glUniform1i(g_cubemapLocation, 0);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/clearcolor.html
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/cleardepth.html
glClearDepth(1.0f);
//http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/enable.html
glEnable( GL_DEPTH_TEST);
//http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/enable.html
glEnable( GL_CULL_FACE);
return GLUS_TRUE;
}
GLUSboolean init(GLUSvoid)
{
GLfloat textureToWorldNormalMatrix[16];
// The maximum detail level which is 2^s = sMapExtend.
GLuint sMaxDetailLevel;
// The maximum detail level which is 2^t = tMapExtend.
GLuint tMaxDetailLevel;
// The overall maximum detail level from s and t.
GLuint overallMaxDetailLevel;
// Step for s and t direction.
GLfloat detailStep;
GLuint s, t;
GLUStgaimage image;
GLfloat* map = 0;
GLuint* indices = 0;
GLUStextfile vertexSource;
GLUStextfile controlSource;
GLUStextfile evaluationSource;
GLUStextfile geometrySource;
GLUStextfile fragmentSource;
GLfloat lightDirection[3] = { 1.0f, 1.0f, 1.0f };
glusVector3Normalizef(lightDirection);
g_topView.cameraPosition[0] = 0.0f;
g_topView.cameraPosition[1] = 30000.0f * METERS_TO_VIRTUAL_WORLD_SCALE;
g_topView.cameraPosition[2] = 0.0f;
g_topView.cameraPosition[3] = 1.0;
g_topView.cameraDirection[0] = 0.0f;
g_topView.cameraDirection[1] = -1.0f;
g_topView.cameraDirection[2] = 0.0f;
g_topView.cameraUp[0] = 0.0f;
g_topView.cameraUp[1] = 0.0f;
g_topView.cameraUp[2] = -1.0f;
g_topView.fov = 40.0f;
g_personView.cameraPosition[0] = 0.0f;
g_personView.cameraPosition[1] = 4700.0f * METERS_TO_VIRTUAL_WORLD_SCALE;
g_personView.cameraPosition[2] = 0.0f;
g_personView.cameraPosition[3] = 1.0;
g_personView.cameraDirection[0] = 0.0f;
g_personView.cameraDirection[1] = 0.0f;
g_personView.cameraDirection[2] = -1.0f;
g_personView.cameraUp[0] = 0.0f;
g_personView.cameraUp[1] = 1.0f;
g_personView.cameraUp[2] = 0.0f;
g_personView.fov = 60.0f;
g_activeView = &g_personView;
if (!glusLoadTgaImage(NORMAL_MAP, &image))
{
printf("Could not load normal picture '%s'!\n", NORMAL_MAP);
return GLUS_FALSE;
}
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glGenTextures(1, &g_normalMapTexture);
glBindTexture(GL_TEXTURE_RECTANGLE, g_normalMapTexture);
glTexImage2D(GL_TEXTURE_RECTANGLE, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glusDestroyTgaImage(&image);
if (!glusLoadTgaImage(HEIGHT_MAP, &image))
{
printf("Could not load height picture '%s'!\n", HEIGHT_MAP);
return GLUS_FALSE;
}
glGenTextures(1, &g_heightMapTexture);
glBindTexture(GL_TEXTURE_RECTANGLE, g_heightMapTexture);
glTexImage2D(GL_TEXTURE_RECTANGLE, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
g_sMapExtend = (GLfloat) image.width;
g_tMapExtend = (GLfloat) image.height;
glusDestroyTgaImage(&image);
// Calculate the detail level for the s and ...
sMaxDetailLevel = (GLuint) floorf(logf(g_sMapExtend) / logf(2.0f));
// ... t extend
tMaxDetailLevel = (GLuint) floorf(logf(g_tMapExtend) / logf(2.0f));
overallMaxDetailLevel = glusMinf(sMaxDetailLevel, tMaxDetailLevel);
// Do checking of calculated parameters
if (MINIMUM_DETAIL_LEVEL > overallMaxDetailLevel)
{
printf("Detail level to high %d > %d\n", MINIMUM_DETAIL_LEVEL, overallMaxDetailLevel);
return GLUS_FALSE;
}
if (MINIMUM_DETAIL_LEVEL + DETAIL_LEVEL_FIRST_PASS > overallMaxDetailLevel)
{
printf("First pass detail level to high %d > %d\n", MINIMUM_DETAIL_LEVEL + DETAIL_LEVEL_FIRST_PASS, overallMaxDetailLevel);
return GLUS_FALSE;
}
if (powf(2.0f, overallMaxDetailLevel - (MINIMUM_DETAIL_LEVEL + DETAIL_LEVEL_FIRST_PASS)) > 32.0f)
{
printf("Tessellation level to high %d > 32\n", (GLint) powf(2.0f, overallMaxDetailLevel - (MINIMUM_DETAIL_LEVEL + DETAIL_LEVEL_FIRST_PASS)));
return GLUS_FALSE;
}
detailStep = powf(2.0f, overallMaxDetailLevel - MINIMUM_DETAIL_LEVEL);
g_sNumPoints = (GLuint) ceilf(g_sMapExtend / detailStep) - 1;
g_tNumPoints = (GLuint) ceilf(g_tMapExtend / detailStep) - 1;
//
// Generate the flat terrain mesh.
//
map = (GLUSfloat*) malloc(g_sNumPoints * g_tNumPoints * 2 * sizeof(GLfloat));
indices = (GLuint*) malloc(g_sNumPoints * g_tNumPoints * sizeof(GLuint));
for (t = 0; t < g_tNumPoints; t++)
{
for (s = 0; s < g_sNumPoints; s++)
{
map[t * g_sNumPoints * 2 + s * 2 + 0] = 0.5f + detailStep / 2.0f + (GLfloat) s * detailStep;
map[t * g_sNumPoints * 2 + s * 2 + 1] = 0.5f + detailStep / 2.0f + (GLfloat) t * detailStep;
indices[t * g_sNumPoints + s + 0] = (t + 0) * g_sNumPoints + s + 0;
}
}
//
// Transferring vertices and indices into GPU
//
// Pass one
glGenBuffers(1, &g_verticesPassOneVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesPassOneVBO);
glBufferData(GL_ARRAY_BUFFER, g_sNumPoints * g_tNumPoints * 2 * sizeof(GLfloat), map, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glGenBuffers(1, &g_indicesPassOneVBO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesPassOneVBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, g_sNumPoints * g_tNumPoints * sizeof(GLuint), indices, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
// Pass two.
glGenBuffers(1, &g_verticesPassTwoVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesPassTwoVBO);
// Calculate enough space!
glBufferData(GL_ARRAY_BUFFER, g_sNumPoints * g_tNumPoints * (GLuint) pow(4, DETAIL_LEVEL_FIRST_PASS + 1) * 2 * sizeof(GLfloat), 0, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
//
free(map);
map = 0;
free(indices);
indices = 0;
//
if (!glusLoadTgaImage(COLOR_MAP, &image))
{
printf("Could not load color picture '%s'!\n", COLOR_MAP);
return GLUS_FALSE;
}
glGenTextures(1, &g_colorMapTexture);
glBindTexture(GL_TEXTURE_2D, g_colorMapTexture);
glTexImage2D(GL_TEXTURE_2D, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glusDestroyTgaImage(&image);
//
glGenQueries(1, &g_transformFeedbackQuery);
//
// Creating the shader program.
//
// Pass one.
glusLoadTextFile("../Example14/shader/PassOne.vert.glsl", &vertexSource);
glusLoadTextFile("../Example14/shader/PassOne.geom.glsl", &geometrySource);
glusLoadTextFile("../Example14/shader/PassOne.frag.glsl", &fragmentSource);
// Compile and ...
glusCreateProgramFromSource(&g_programPassOne, (const GLUSchar**) &vertexSource.text, 0, 0, (const GLUSchar**) &geometrySource.text, (const GLUSchar**) &fragmentSource.text);
// ... add the transform variable ...
glTransformFeedbackVaryings(g_programPassOne.program, 1, (const GLchar**) &TRANSFORM_VARYING, GL_SEPARATE_ATTRIBS);
// ... and link the program
if (!glusLinkProgram(&g_programPassOne))
{
printf("Could not build program one\n");
return GLUS_FALSE;
}
// Destroy the text resource
glusDestroyTextFile(&vertexSource);
glusDestroyTextFile(&geometrySource);
glusDestroyTextFile(&fragmentSource);
g_halfDetailStepPassOneLocation = glGetUniformLocation(g_programPassOne.program, "u_halfDetailStep");
g_detailLevelPassOneLocation = glGetUniformLocation(g_programPassOne.program, "u_detailLevel");
g_fovRadiusPassOneLocation = glGetUniformLocation(g_programPassOne.program, "u_fovRadius");
g_positionTextureSpacePassOneLocation = glGetUniformLocation(g_programPassOne.program, "u_positionTextureSpace");
g_leftNormalTextureSpacePassOneLocation = glGetUniformLocation(g_programPassOne.program, "u_leftNormalTextureSpace");
g_rightNormalTextureSpacePassOneLocation = glGetUniformLocation(g_programPassOne.program, "u_rightNormalTextureSpace");
g_backNormalTextureSpacePassOneLocation = glGetUniformLocation(g_programPassOne.program, "u_backNormalTextureSpace");
// Pass two.
glusLoadTextFile("../Example14/shader/PassTwo.vert.glsl", &vertexSource);
glusLoadTextFile("../Example14/shader/PassTwo.cont.glsl", &controlSource);
glusLoadTextFile("../Example14/shader/PassTwo.eval.glsl", &evaluationSource);
glusLoadTextFile("../Example14/shader/PassTwo.geom.glsl", &geometrySource);
glusLoadTextFile("../Example14/shader/PassTwo.frag.glsl", &fragmentSource);
if (!glusBuildProgramFromSource(&g_shaderProgramPassTwo, (const GLUSchar**) &vertexSource.text, (const GLUSchar**) &controlSource.text, (const GLUSchar**) &evaluationSource.text, (const GLUSchar**) &geometrySource.text, (const GLUSchar**) &fragmentSource.text))
{
printf("Could not build program two\n");
return GLUS_FALSE;
}
glusDestroyTextFile(&vertexSource);
glusDestroyTextFile(&controlSource);
glusDestroyTextFile(&evaluationSource);
glusDestroyTextFile(&geometrySource);
glusDestroyTextFile(&fragmentSource);
g_maxTessellationLevelPassTwoLocation = glGetUniformLocation(g_shaderProgramPassTwo.program, "u_maxTessellationLevel");
g_quadrantStepPassTwoLocation = glGetUniformLocation(g_shaderProgramPassTwo.program, "u_quadrantStep");
g_positionTextureSpacePassTwoLocation = glGetUniformLocation(g_shaderProgramPassTwo.program, "u_positionTextureSpace");
g_heightMapTexturePassTwoLocation = glGetUniformLocation(g_shaderProgramPassTwo.program, "u_heightMapTexture");
g_normalMapTexturePassTwoLocation = glGetUniformLocation(g_shaderProgramPassTwo.program, "u_normalMapTexture");
g_tmvpPassTwoLocation = glGetUniformLocation(g_shaderProgramPassTwo.program, "u_tmvpMatrix");
g_lightDirectionPassTwoLocation = glGetUniformLocation(g_shaderProgramPassTwo.program, "u_lightDirection");
g_colorMapTexturePassTwoLocation = glGetUniformLocation(g_shaderProgramPassTwo.program, "u_colorMapTexture");
//
// One time matrix calculations to convert between texture and world space
glusMatrix4x4Identityf(g_textureToWorldMatrix);
glusMatrix4x4Identityf(textureToWorldNormalMatrix);
glusMatrix4x4Scalef(g_textureToWorldMatrix, HORIZONTAL_PIXEL_SPACING * METERS_TO_VIRTUAL_WORLD_SCALE, VERTICAL_PIXEL_RANGE * METERS_TO_VIRTUAL_WORLD_SCALE, HORIZONTAL_PIXEL_SPACING * METERS_TO_VIRTUAL_WORLD_SCALE);
// Skip this scale for the normal matrix
glusMatrix4x4Scalef(g_textureToWorldMatrix, 1.0f, 1.0f, -1.0f);
glusMatrix4x4Scalef(textureToWorldNormalMatrix, 1.0f, 1.0f, -1.0f);
glusMatrix4x4Translatef(g_textureToWorldMatrix, -g_sMapExtend / 2.0f, 0.0f, -g_tMapExtend / 2.0f);
// No need for the translation matrix in the normal matrix
glusMatrix4x4Copyf(g_worldToTextureMatrix, g_textureToWorldMatrix, GLUS_FALSE);
glusMatrix4x4Inversef(g_worldToTextureMatrix);
glusMatrix4x4Copyf(g_worldToTextureNormalMatrix, textureToWorldNormalMatrix, GLUS_FALSE);
glusMatrix4x4Inversef(g_worldToTextureNormalMatrix);
// Pass one
glUseProgram(g_programPassOne.program);
glUniform1f(g_halfDetailStepPassOneLocation, detailStep / 2.0f);
glUniform1ui(g_detailLevelPassOneLocation, DETAIL_LEVEL_FIRST_PASS);
glUniform1f(g_fovRadiusPassOneLocation, FOV_RADIUS / HORIZONTAL_PIXEL_SPACING * METERS_TO_VIRTUAL_WORLD_SCALE);
glGenVertexArrays(1, &g_vaoPassOne);
glBindVertexArray(g_vaoPassOne);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesPassOneVBO);
// First 0 is the location = 0. See shader source
glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, 0);
// Enable location = 0
glEnableVertexAttribArray(0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesPassOneVBO);
// Pass two
glUseProgram(g_shaderProgramPassTwo.program);
glUniform3fv(g_lightDirectionPassTwoLocation, 1, lightDirection);
glUniform1ui(g_maxTessellationLevelPassTwoLocation, overallMaxDetailLevel - (MINIMUM_DETAIL_LEVEL + DETAIL_LEVEL_FIRST_PASS));
glUniform1i(g_quadrantStepPassTwoLocation, QUADRANT_STEP);
glGenVertexArrays(1, &g_vaoPassTwo);
glBindVertexArray(g_vaoPassTwo);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesPassTwoVBO);
// First 0 is the location = 0. See shader source
glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, 0);
// Enable location = 0
glEnableVertexAttribArray(0);
//
glActiveTexture(GL_TEXTURE0);
glUniform1i(g_heightMapTexturePassTwoLocation, 0);
glBindTexture(GL_TEXTURE_RECTANGLE, g_heightMapTexture);
glActiveTexture(GL_TEXTURE1);
glUniform1i(g_colorMapTexturePassTwoLocation, 1);
glBindTexture(GL_TEXTURE_2D, g_colorMapTexture);
glActiveTexture(GL_TEXTURE2);
glUniform1i(g_normalMapTexturePassTwoLocation, 2);
glBindTexture(GL_TEXTURE_RECTANGLE, g_normalMapTexture);
//
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClearDepth(1.0f);
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
glPatchParameteri(GL_PATCH_VERTICES, 4);
return GLUS_TRUE;
}
/**
* Function for initialization.
*/
GLUSboolean init(GLUSvoid)
{
// Matrix for the model
GLfloat model[16];
GLUSshape cube;
GLUStgaimage image;
GLUStextfile vertexSource;
GLUStextfile fragmentSource;
// Load the source of the vertex shader.
glusLoadTextFile("../Example05/Vertex.vs", &vertexSource);
// Load the source of the fragment shader.
glusLoadTextFile("../Example05/Fragment.fs", &fragmentSource);
// Build and ...
glusBuildProgram(&g_program, (const GLUSchar**)&vertexSource.text, 0, (const GLUSchar**)&fragmentSource.text);
// Destroy the text resource
glusDestroyTextFile(&vertexSource);
// Destroy the text resource
glusDestroyTextFile(&fragmentSource);
// ToDo:
glGenVertexArrays(1, &g_vao);
// ToDo:
glBindVertexArray(g_vao);
glusCreateCubef(&cube, 0.5f);
numberIndices = cube.numberIndices;
// http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformLocation.xml
g_projectionLocation = glGetUniformLocation(g_program.program, "projectionMatrix");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformLocation.xml
g_modelViewLocation = glGetUniformLocation(g_program.program, "modelViewMatrix");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformLocation.xml
g_textureLocation = glGetUniformLocation(g_program.program, "firstTexture");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetAttribLocation.xml
g_vertexLocation = glGetAttribLocation(g_program.program, "vertex");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetAttribLocation.xml
g_normalLocation = glGetAttribLocation(g_program.program, "normal");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetAttribLocation.xml
g_texCoordLocation = glGetAttribLocation(g_program.program, "texCoord");
// ToDo:
glBindFragDataLocation(g_program.program, 0, "fragColor");
// http://www.opengl.org/sdk/docs/man/xhtml/glGenBuffers.xml
glGenBuffers(1, &g_vertices);
// http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
glBindBuffer(GL_ARRAY_BUFFER, g_vertices);
// http://www.opengl.org/sdk/docs/man/xhtml/glBufferData.xml
glBufferData(GL_ARRAY_BUFFER, cube.numberVertices*4*sizeof(GLfloat), (GLfloat*)cube.vertices, GL_STATIC_DRAW);
// http://www.opengl.org/sdk/docs/man/xhtml/glGenBuffers.xml
glGenBuffers(1, &g_normals);
// http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
glBindBuffer(GL_ARRAY_BUFFER, g_normals);
// http://www.opengl.org/sdk/docs/man/xhtml/glBufferData.xml
glBufferData(GL_ARRAY_BUFFER, cube.numberVertices*3*sizeof(GLfloat), (GLfloat*)cube.normals, GL_STATIC_DRAW);
// http://www.opengl.org/sdk/docs/man/xhtml/glGenBuffers.xml
glGenBuffers(1, &g_texCoords);
// http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
glBindBuffer(GL_ARRAY_BUFFER, g_texCoords);
// http://www.opengl.org/sdk/docs/man/xhtml/glBufferData.xml
glBufferData(GL_ARRAY_BUFFER, cube.numberVertices*2*sizeof(GLfloat), (GLfloat*)cube.texCoords, GL_STATIC_DRAW);
// http://www.opengl.org/sdk/docs/man/xhtml/glGenBuffers.xml
glGenBuffers(1, &g_indices);
// http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indices);
// http://www.opengl.org/sdk/docs/man/xhtml/glBufferData.xml
glBufferData(GL_ELEMENT_ARRAY_BUFFER, cube.numberIndices*sizeof(GLuint), (GLuint*)cube.indices, GL_STATIC_DRAW);
glusDestroyShapef(&cube);
glusLoadTgaImage("crate.tga", &image);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/gentextures.html
glGenTextures(1, &g_texture);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/bindtexture.html
glBindTexture(GL_TEXTURE_2D, g_texture);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/teximage2d.html
glTexImage2D(GL_TEXTURE_2D, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/texparameter.html
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/texparameter.html
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/texparameter.html
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/texparameter.html
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
// http://www.opengl.org/sdk/docs/man/xhtml/glUseProgram.xml
glUseProgram(g_program.program);
// Calculate the model matrix ...
glusLoadIdentityf(model);
glusRotateRzRyRxf(model, 30.0f, 30.0f, 0.0f);
// ... and the view matrix ...
glusLookAtf(g_modelView, 0.0f, 0.0f, 5.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f);
// ... to get the final model view matrix
glusMultMatrixf(g_modelView, g_modelView, model);
// http://www.opengl.org/sdk/docs/man/xhtml/glUniform.xml
glUniformMatrix4fv(g_modelViewLocation, 1, GL_FALSE, g_modelView);
// http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
glBindBuffer(GL_ARRAY_BUFFER, g_vertices);
// http://www.opengl.org/sdk/docs/man/xhtml/glVertexAttribPointer.xml
glVertexAttribPointer(g_vertexLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
// http://www.opengl.org/sdk/docs/man/xhtml/glEnableVertexAttribArray.xml
glEnableVertexAttribArray(g_vertexLocation);
// http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
glBindBuffer(GL_ARRAY_BUFFER, g_normals);
// http://www.opengl.org/sdk/docs/man/xhtml/glVertexAttribPointer.xml
glVertexAttribPointer(g_normalLocation, 3, GL_FLOAT, GL_FALSE, 0, 0);
// http://www.opengl.org/sdk/docs/man/xhtml/glEnableVertexAttribArray.xml
glEnableVertexAttribArray(g_normalLocation);
// http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
glBindBuffer(GL_ARRAY_BUFFER, g_texCoords);
// http://www.opengl.org/sdk/docs/man/xhtml/glVertexAttribPointer.xml
glVertexAttribPointer(g_texCoordLocation, 2, GL_FLOAT, GL_FALSE, 0, 0);
// http://www.opengl.org/sdk/docs/man/xhtml/glEnableVertexAttribArray.xml
glEnableVertexAttribArray(g_texCoordLocation);
// http://www.opengl.org/sdk/docs/man/xhtml/glUniform.xml
glUniform1i(g_textureLocation, 0);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/clearcolor.html
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/cleardepth.html
glClearDepth(1.0f);
//http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/enable.html
glEnable(GL_DEPTH_TEST);
//http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/enable.html
glEnable(GL_CULL_FACE);
return GLUS_TRUE;
}
