SimpleMesh::SimpleMesh(GLuint a_programId, int a_slicesNum, int a_meshType, float a_halfSize)
{
if(a_meshType == SPHERE)
glusCreateSpheref(&m_glusShape, a_halfSize, a_slicesNum);
else if(a_meshType == CUBE)
glusCreateCubef(&m_glusShape, a_halfSize);
else if(a_meshType == CUBE_OPEN)
glusCreateCubeOpenf(&m_glusShape, a_halfSize);
else if(a_meshType == PLANE)
{
if(a_slicesNum <= 2)
{
glusCreatePlanef(&m_glusShape, a_halfSize);
for(unsigned int i=0;i<2*m_glusShape.numberVertices;i++)
m_glusShape.texCoords[i] *= 2.0f;
}
else
glusCreatePlaneSlicedf(&m_glusShape, a_halfSize, a_slicesNum);
}
else if(a_meshType == TORUS)
glusCreateTorusf(&m_glusShape, 0.5f*a_halfSize, a_halfSize, a_slicesNum, 32*a_slicesNum);
else
glusCreateCubef(&m_glusShape, 1.0f);
CreateGPUData(a_programId);
}
SimpleMesh::SimpleMesh(GLuint a_programId, int a_slicesNum, int a_meshType, float a_halfSize)
{
if(a_meshType == SPHERE)
glusCreateSpheref(&m_glusShape, a_halfSize, a_slicesNum);
else if(a_meshType == CUBE)
glusCreateCubef(&m_glusShape, a_halfSize);
else if(a_meshType == PLANE)
{
glusCreatePlanef(&m_glusShape, a_halfSize);
for(unsigned int i=0;i<2*m_glusShape.numberVertices;i++)
m_glusShape.texCoords[i] *= 2.0f;
}
else if(a_meshType == TORUS)
glusCreateTorusf(&m_glusShape, 0.5f*a_halfSize, a_halfSize, a_slicesNum, 32*a_slicesNum);
else
glusCreateCubef(&m_glusShape, 1.0f);
m_vertexPosBufferObject = 0;
m_vertexPosLocation = glGetAttribLocation(a_programId, "vertex");
m_vertexNormLocation = glGetAttribLocation(a_programId, "normal");
m_vertexTexCoordsLocation = glGetAttribLocation(a_programId, "texCoord");
GLint maxVertexAttributes = 0;
glGetIntegerv(GL_MAX_VERTEX_ATTRIBS, &maxVertexAttributes);
// create buffers a,d fill them with data
// vertex positions
//
glGenBuffers(1, &m_vertexPosBufferObject); CHECK_GL_ERRORS;
glBindBuffer(GL_ARRAY_BUFFER, m_vertexPosBufferObject); CHECK_GL_ERRORS;
glBufferData(GL_ARRAY_BUFFER, m_glusShape.numberVertices * 4 * sizeof(GLfloat), (GLfloat*) m_glusShape.vertices, GL_STATIC_DRAW); CHECK_GL_ERRORS;
// vertex normals
//
glGenBuffers(1, &m_vertexNormBufferObject); CHECK_GL_ERRORS;
glBindBuffer(GL_ARRAY_BUFFER, m_vertexNormBufferObject); CHECK_GL_ERRORS;
glBufferData(GL_ARRAY_BUFFER, m_glusShape.numberVertices * 3 * sizeof(GLfloat), (GLfloat*) m_glusShape.normals, GL_STATIC_DRAW); CHECK_GL_ERRORS;
// vertex texture coordinates
//
glGenBuffers(1, &m_vertexTexCoordsBufferObject); CHECK_GL_ERRORS;
glBindBuffer(GL_ARRAY_BUFFER, m_vertexTexCoordsBufferObject); CHECK_GL_ERRORS;
glBufferData(GL_ARRAY_BUFFER, m_glusShape.numberVertices * 2 * sizeof(GLfloat), (GLfloat*) m_glusShape.texCoords, GL_STATIC_DRAW); CHECK_GL_ERRORS;
// index buffer
//
glGenBuffers(1, &m_indexBufferObject);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_indexBufferObject);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, m_glusShape.numberIndices * sizeof(GLuint), (GLuint*)m_glusShape.indices, GL_STATIC_DRAW);
// create VAO and bind each buffer to appropriate "pointer", called vertex array attribute
//
glGenVertexArrays(1, &m_vertexArrayObject); CHECK_GL_ERRORS;
glBindVertexArray(m_vertexArrayObject); CHECK_GL_ERRORS;
if(m_vertexPosLocation < GLuint(maxVertexAttributes))
{
glBindBuffer(GL_ARRAY_BUFFER, m_vertexPosBufferObject); CHECK_GL_ERRORS;
glEnableVertexAttribArray(m_vertexPosLocation); CHECK_GL_ERRORS;
glVertexAttribPointer(m_vertexPosLocation, 4, GL_FLOAT, GL_FALSE, 0, 0); CHECK_GL_ERRORS;
}
if(m_vertexNormLocation < GLuint(maxVertexAttributes))
{
glBindBuffer(GL_ARRAY_BUFFER, m_vertexNormBufferObject); CHECK_GL_ERRORS;
glEnableVertexAttribArray(m_vertexNormLocation); CHECK_GL_ERRORS;
glVertexAttribPointer(m_vertexNormLocation, 3, GL_FLOAT, GL_FALSE, 0, 0); CHECK_GL_ERRORS;
}
if(m_vertexTexCoordsLocation < GLuint(maxVertexAttributes))
{
glBindBuffer(GL_ARRAY_BUFFER, m_vertexTexCoordsBufferObject); CHECK_GL_ERRORS;
glEnableVertexAttribArray(m_vertexTexCoordsLocation); CHECK_GL_ERRORS;
glVertexAttribPointer(m_vertexTexCoordsLocation, 2, GL_FLOAT, GL_FALSE, 0, 0); CHECK_GL_ERRORS;
}
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_indexBufferObject); CHECK_GL_ERRORS;
glBindVertexArray(0); // unbind VAO
}
ShapePtr ShapeFactory::createBox(float halfExtent)
{
GLUSshape box;
glusCreateCubef(&box, halfExtent);
return boost::make_shared<Shape>(box.vertices, box.numberVertices, box.normals, box.indices, box.numberIndices, box.texCoords);
}
/**
* 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;
}
