Method RenderCustomGL

examples/Test.cpp:776–871

}

void SampleApp::RenderCustomGL() {
	static sf::Clock clock;

	glMatrixMode( GL_MODELVIEW );
	glPushMatrix();
	glLoadIdentity();

	glTranslatef( 0.f, 0.f, -3.f );

	glRotatef( clock.getElapsedTime().asSeconds() * 50.f, 1.f, 0.f, 0.f );
	glRotatef( clock.getElapsedTime().asSeconds() * 30.f, 0.f, 1.f, 0.f );
	glRotatef( clock.getElapsedTime().asSeconds() * 90.f, 0.f, 0.f, 1.f );

	glViewport( 0, 0, static_cast<int>( std::floor( m_gl_canvas->GetAllocation().size.x + .5f ) ), static_cast<int>( std::floor( m_gl_canvas->GetAllocation().size.y + .5f ) ) );

	if( !m_custom_draw_display_list ) {
		m_custom_draw_display_list = glGenLists( 1 );

		glNewList( m_custom_draw_display_list, GL_COMPILE );

		glEnable( GL_DEPTH_TEST );
		glDepthMask( GL_TRUE );

		glDisable( GL_TEXTURE_2D );

		glMatrixMode( GL_PROJECTION );
		glPushMatrix();
		glLoadIdentity();

		static const auto pi = 3.1415926535897932384626433832795f;
		static const auto fov = 90.f;
		static const auto near_distance = 1.f;
		static const auto far_distance = 20.f;

		// We set the proper aspect ratio using the dimensions of our Canvas.
		auto aspect = m_gl_canvas->GetAllocation().size.x / m_gl_canvas->GetAllocation().size.y;
		auto frustum_height = std::tan( fov / 360 * pi ) * near_distance;
		auto frustum_width = frustum_height * aspect;

		glFrustum( -frustum_width, frustum_width, -frustum_height, frustum_height, near_distance, far_distance );

		glBegin( GL_QUADS );

		glColor3f( 0.f, 0.f, 1.f );
		glVertex3f( -1.f, -1.f, -1.f );
		glVertex3f( -1.f, 1.f, -1.f );
		glVertex3f( 1.f, 1.f, -1.f );
		glVertex3f( 1.f, -1.f, -1.f );

		glColor3f( 0.f, 1.f, 0.f );
		glVertex3f( -1.f, -1.f, 1.f );
		glVertex3f( -1.f, 1.f, 1.f );
		glVertex3f( 1.f, 1.f, 1.f );
		glVertex3f( 1.f, -1.f, 1.f );

		glColor3f( 0.f, 1.f, 1.f );
		glVertex3f( -1.f, -1.f, -1.f );
		glVertex3f( -1.f, 1.f, -1.f );