Pushes the current transformation onto the stack, and returns
whether there was room on the stack (true) to push it there or not
Note: If you forget to "pop" transformations you will at some moment run out of room on the stack.
d3d_transform_add_rotation_axis(1, 0, 0, 5);
The above code will pop the previous transformation from the stack, then add a rotation over the x axis, before finally pushing the final transform back onto the stack again.