// Create the Vertex Buffer Objects used to render with OpenGL. /// We create two VBOs (one for vertices and one for indices) void ConvexMesh::createVBOAndVAO() { // Create the VBO for the vertices data mVBOVertices.create(); mVBOVertices.bind(); size_t sizeVertices = mVertices.size() * sizeof(openglframework::Vector3); mVBOVertices.copyDataIntoVBO(sizeVertices, getVerticesPointer(), GL_STATIC_DRAW); mVBOVertices.unbind(); // Create the VBO for the normals data mVBONormals.create(); mVBONormals.bind(); size_t sizeNormals = mNormals.size() * sizeof(openglframework::Vector3); mVBONormals.copyDataIntoVBO(sizeNormals, getNormalsPointer(), GL_STATIC_DRAW); mVBONormals.unbind(); if (hasTexture()) { // Create the VBO for the texture co data mVBOTextureCoords.create(); mVBOTextureCoords.bind(); size_t sizeTextureCoords = mUVs.size() * sizeof(openglframework::Vector2); mVBOTextureCoords.copyDataIntoVBO(sizeTextureCoords, getUVTextureCoordinatesPointer(), GL_STATIC_DRAW); mVBOTextureCoords.unbind(); } // Create th VBO for the indices data mVBOIndices.create(); mVBOIndices.bind(); size_t sizeIndices = mIndices[0].size() * sizeof(unsigned int); mVBOIndices.copyDataIntoVBO(sizeIndices, getIndicesPointer(), GL_STATIC_DRAW); mVBOIndices.unbind(); // Create the VAO for both VBOs mVAO.create(); mVAO.bind(); // Bind the VBO of vertices mVBOVertices.bind(); // Bind the VBO of normals mVBONormals.bind(); if (hasTexture()) { // Bind the VBO of texture coords mVBOTextureCoords.bind(); } // Bind the VBO of indices mVBOIndices.bind(); // Unbind the VAO mVAO.unbind(); }
// Render the sphere at the correct position and with the correct orientation void Sphere::render(openglframework::Shader& shader, const openglframework::Matrix4& worldToCameraMatrix) { // Bind the shader shader.bind(); // Set the model to camera matrix const openglframework::Matrix4 localToCameraMatrix = worldToCameraMatrix * mTransformMatrix; shader.setMatrix4x4Uniform("localToCameraMatrix", localToCameraMatrix); // Set the normal matrix (inverse transpose of the 3x3 upper-left sub matrix of the // model-view matrix) const openglframework::Matrix3 normalMatrix = localToCameraMatrix.getUpperLeft3x3Matrix().getInverse().getTranspose(); shader.setMatrix3x3Uniform("normalMatrix", normalMatrix); glEnableClientState(GL_VERTEX_ARRAY); glEnableClientState(GL_NORMAL_ARRAY); if (hasTexture()) { glEnableClientState(GL_TEXTURE_COORD_ARRAY); } glVertexPointer(3, GL_FLOAT, 0, getVerticesPointer()); glNormalPointer(GL_FLOAT, 0, getNormalsPointer()); if(hasTexture()) { glTexCoordPointer(2, GL_FLOAT, 0, getUVTextureCoordinatesPointer()); } // For each part of the mesh for (unsigned int i=0; i<getNbParts(); i++) { glDrawElements(GL_TRIANGLES, getNbFaces(i) * 3, GL_UNSIGNED_INT, getIndicesPointer()); } glDisableClientState(GL_NORMAL_ARRAY); glDisableClientState(GL_VERTEX_ARRAY); if (hasTexture()) { glDisableClientState(GL_TEXTURE_COORD_ARRAY); } // Unbind the shader shader.unbind(); }