void GLPatch::initializeBuffers(ShaderProgram & shaderProgram) {
std::vector<BezierPatch> patchesv;
ReadBezierPatches("data/teapot.data", patchesv);
float patchesf[patchesv.size()][192];
for (int i = 0; i < patchesv.size(); i++)
{
float patch[192];
paramSurfaces(patchesv[i], patch);
m_numberOfPatches[i] = sizeof(patch) / sizeof(float); //i know this will be constant
m_vertexPositionAttribute = glGetAttribLocation(shaderProgram.getProgram(), "aPosition");
GLuint m_Patch;
m_Patches[i] = m_Patch;
glGenBuffers(1, &m_Patch);
glBindBuffer(GL_ARRAY_BUFFER, m_Patch);
glBufferData(GL_ARRAY_BUFFER, sizeof(patch), patch, GL_STATIC_DRAW);
}
// glGenBuffers(1, &m_Patch);
// glBindBuffer(GL_ARRAY_BUFFER, m_Patch);
// glBufferData(GL_ARRAY_BUFFER, sizeof(patch), patch, GL_STATIC_DRAW);
glm::vec3 Normal = glm::cross((patchesv[0][0][0] - patchesv[0][0][2]),(patchesv[0][0][2] - patchesv[0][3][3]));
glm::vec3 N = glm::normalize(glm::vec3(Normal[0]+0.00001f,Normal[1]+0.000001f,Normal[2]+0.00001f));
glUniform4f(glGetUniformLocation(shaderProgram.getProgram(), "uNormal"), N[0], N[0], N[2], 1.0);
//Get a handle to the shader attribute aPosition and set it up:
m_vertexPositionAttribute = glGetAttribLocation(shaderProgram.getProgram(), "aPosition");
glVertexAttribPointer(m_vertexPositionAttribute, 3, GL_FLOAT, GL_FALSE, 0, 0);
}
BezierPatchModel::BezierPatchModel(const char * filename)
{
level = 0;
try {
ReadBezierPatches(filename, patches);
setLevel(1);
}
catch (const std::exception &e) {
std::cerr << "Exception: " << e.what() << std::endl;
}
}
