How can I retrieve the current position of the vertices after they have been transformed? I have the following code....
How can I get the position of the "modelVertices" after the transform has been applied?
I am really after the screen coordinates so I can tell if a vert has been clicked by the mouse.
glMatrixMode(GL_MODELVIEW);
// save model transform matrix
GLfloat currentModelMatrix[16];
glGetFloatv(GL_MODELVIEW_MATRIX, currentModelMatrix);
// clear the model transform matrix
glLoadIdentity();
// rotate the x and y axis of the model transform matrix
glRotatef(rotateX, 1.0f, 0.0f, 0.0f);
glRotatef(rotateY, 0.0f, 1.0f, 0.0f);
// reapply the previous transforms
glMultMatrixf(currentModelMatrix);
glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT);
// since each vertes is defined in 3D instead of 2D parameter one has been
// upped from 2 to 3 to respect this change.
glVertexPointer(3, GL_FLOAT, 0, modelVertices);
glEnableClientState(GL_VERTEX_ARRAY);