View Frustum Culling

cited tutorial

In order to perform view frustum culling, two steps are required:

• Extract the frustum volume information - this has to be done every time the frustum changes, i.e., when the camera moves or when the perspective changes 

• Test the objects against the frustum's volume to determine whether to cull or not - this has to be performed for every object in every frame. If the culling status of each object is kept from frame to frame then the test itself may be done only when the camera moves, i.e. when the frustum is updated or perspective changes.