void gr_reset_matrices() {
vm_matrix4_set_identity(&gr_projection_matrix);
vm_matrix4_set_identity(&gr_last_projection_matrix);
vm_matrix4_set_identity(&gr_view_matrix);
vm_matrix4_set_identity(&gr_last_view_matrix);
vm_matrix4_set_identity(&gr_model_view_matrix);
gr_model_matrix_stack.clear();
}
void gr_end_view_matrix()
{
Assert(modelview_matrix_depth == 2);
gr_model_matrix_stack.clear();
vm_matrix4_set_identity(&gr_view_matrix);
vm_matrix4_set_identity(&gr_model_view_matrix);
modelview_matrix_depth = 1;
htl_view_matrix_set = false;
gr_env_texture_matrix_set = false;
}
void gr_opengl_end_view_matrix()
{
Assert(GL_modelview_matrix_depth == 2);
GL_model_matrix_stack.clear();
vm_matrix4_set_identity(&GL_view_matrix);
vm_matrix4_set_identity(&GL_model_view_matrix);
GL_modelview_matrix_depth = 1;
GL_htl_view_matrix_set = 0;
GL_env_texture_matrix_set = false;
}
// set a view and projection matrix for a 2D element
// TODO: this probably needs to accept values
void gr_set_2d_matrix(/*int x, int y, int w, int h*/)
{
// don't bother with this if we aren't even going to need it
if (!gr_htl_projection_matrix_set) {
return;
}
Assert( htl_2d_matrix_set == 0 );
Assert( htl_2d_matrix_depth == 0 );
// the viewport needs to be the full screen size since glOrtho() is relative to it
gr_set_viewport(0, 0, gr_screen.max_w, gr_screen.max_h);
gr_last_projection_matrix = gr_projection_matrix;
// the top and bottom positions are reversed on purpose, but RTT needs them the other way
if (gr_screen.rendering_to_texture != -1) {
create_orthographic_projection_matrix(&gr_projection_matrix, 0, i2fl(gr_screen.max_w), 0, i2fl(gr_screen.max_h), -1, 1);
} else {
create_orthographic_projection_matrix(&gr_projection_matrix, 0, i2fl(gr_screen.max_w), i2fl(gr_screen.max_h), 0, -1, 1);
}
matrix4 identity_mat;
vm_matrix4_set_identity(&identity_mat);
gr_model_matrix_stack.push_and_replace(identity_mat);
gr_last_view_matrix = gr_view_matrix;
gr_view_matrix = identity_mat;
vm_matrix4_x_matrix4(&gr_model_view_matrix, &gr_view_matrix, &identity_mat);
htl_2d_matrix_set = true;
htl_2d_matrix_depth++;
}
