Method update

samples/FrustumCulling/src/FrustumCullingApp.cpp:157–204

}

void FrustumCullingReduxApp::update()
{
	// Calculate elapsed time.
	double elapsed = getElapsedSeconds() - mCurrentSeconds;
	mCurrentSeconds += elapsed;

	// perform frustum culling **********************************************************************************

	// Save the current culling field of view. If mShowRevealingFov = true, 
	// this will narrow the camera's FOV so that you can see the culling effect.
	float originalFov = mRenderCam.getFov();
	mRenderCam.setFov( mCullingFov );

	// Obtain the camera's view frustum, allowing us to perform frustum culling.
	Frustumf visibleWorld( mRenderCam );

	// Restore FOV to original
	mRenderCam.setFov( originalFov );

	for( auto & obj : mObjects ) {
		// Update object (so it rotates slowly around its axis).
		obj->update( elapsed );

		if( !mPerformCulling ) {
			// Don't cull the object. All objects will be drawn,
			// even if they are outside the camera's view frustum.
			obj->setCulled( false );
		}
		else if( mCullWithSpheres ) {
			// Use the object's bounding sphere, converted to world space.
			Sphere worldBoundingSphere = mObjectBoundingSphere.transformed( obj->getTransform() );

			// Check if the bounding sphere intersects the camera's view frustum.
			obj->setCulled( !visibleWorld.intersects( worldBoundingSphere ) );
		}
		else {
			// Use the object's bounding box, converted to world space.
			AxisAlignedBox worldBoundingBox = mObjectBoundingBox.transformed( obj->getTransform() );

			// Check if the bounding box intersects the camera's view frustum.
			obj->setCulled( !visibleWorld.intersects( worldBoundingBox ) );
		}
	}

	// Update window title.
	if( getElapsedFrames() % 60 == 0 )
		getWindow()->setTitle( "Frustum Culling Redux - " + toString( (int) getAverageFps() ) + " FPS" );
}

void FrustumCullingReduxApp::draw()
{