Pushmatrix
The PushMatrix and PopMatrix functions push and pop the current matrix stack.
PushMatrix();
Remarks
There is a stack of matrices for each of the matrix modes. In GL_MODELVIEW mode, the stack depth is at least 32. In the other two modes, GL_PROJECTION and GL_TEXTURE, the depth is at least 2. The current matrix in any mode is the matrix on the top of the stack for that mode.
The PushMatrix function pushes the current matrix stack down by one, duplicating the current matrix. That is, after a PushMatrix call, the matrix on the top of the stack is identical to the one below it. The PopMatrix function pops the current matrix stack, replacing the current matrix with the one below it on the stack. Initially, each of the stacks contains one matrix, an identity matrix.
Note: Do not call PushMatrix between a call to Begin and the corresponding call to End.
See Also