Method draw

samples/FrustumCulling/src/FrustumCullingApp.cpp:206–303

}

void FrustumCullingReduxApp::draw()
{
	// Clear the window.
	gl::clear( Color::gray( 0.25f ) );

	{
		// Get ready to render a 3D world.
		gl::ScopedMatrices scopeMatrix;
		gl::setMatrices( mRenderCam );

		gl::ScopedState scopeState( GL_CULL_FACE, true );
		gl::enableDepthRead();
		gl::enableDepthWrite();

		// Draw all objects.
		for( auto & obj : mObjects )
			obj->draw();

		// Draw bounding volumes.
		if( mDrawWorldSpaceBounds ) {
			for( auto & obj : mObjects ) {
				// Use cyan bounds if not culled, orange bounds if culled.
				if( !obj->isCulled() )
					gl::color( Color( 0, 1, 1 ) );
				else
					gl::color( Color( 1, 0.5f, 0 ) );

				if( mCullWithSpheres ) {
					// Create a fast approximation of the world space bounding sphere.
					Sphere worldBoundingSphere = mObjectBoundingSphere.transformed( obj->getTransform() );

					gl::ScopedModelMatrix mtx;
					gl::translate( worldBoundingSphere.getCenter() );
					gl::scale( vec3( worldBoundingSphere.getRadius() ) );
					mSphereBatch->draw();
				}
				else {
					// Create a fast approximation of the world space bounding box by transforming the
					// eight corners and using them to create a new axis aligned bounding box.
					AxisAlignedBox worldBoundingBox = mObjectBoundingBox.transformed( obj->getTransform() );

					gl::ScopedModelMatrix mtx;
					gl::translate( worldBoundingBox.getCenter() );
					gl::scale( worldBoundingBox.getSize() );
					mBoxBatch->draw();
				}

				// Don't draw object space bounds if culled.
				if( obj->isCulled() )
					continue;

				if( mDrawObjectSpaceBounds ) {
					if( mCullWithSpheres ) {
						// Draw the precise bounding sphere in yellow. You will be able to
						// see how much it differs from the world space bounding sphere approximation.
						gl::color( Color( 1, 1, 0 ) );

						gl::ScopedModelMatrix mtx;