void MatrixStack::Apply(RenderDevice& render_device)
{
if(_state_dirty)
{
State& current_state = _states.top();
render_device.SetUniformMatrix4f("view_matrix", current_state.view_matrix);
// model_view = view * model
Mat4x4 model_view = matrix::Multiply(current_state.view_matrix, current_state.model_matrix);
render_device.SetUniformMatrix4f("model_view_matrix", model_view);
// Build our model view projection matrix
// model_view_projection = projection * view * model
Mat4x4 model_view_projection = matrix::Multiply(current_state.projection_matrix, model_view);
render_device.SetUniformMatrix4f("model_view_projection_matrix", model_view_projection);
_state_dirty = false;
}
}
