Clipping

Clipping is a technique that solves a problem you may have seen before in 3D applications or demos, and that exists due to culling—an object comes too close to the camera, and because triangles are partially outside the frustum, they are culled and disappear. The following screenshot shows a sphere in Papervision3D that is very close to the camera. At the left side of the screenshot you can see that triangles have disappeared because of culling.

Clipping solves this problem by dividing the triangles that are too close to the camera into new triangles.

Note

Clipping is the process of dividing triangles of objects that are partially inside the frustum. Triangles that are divided into smaller ones will be rendered, whereas triangles that are outside the frustum will be thrown away.

Papervision3D includes the FrustumClipping class, which takes care of the clipping process described above.

Clipping in Papervision3D with FrustumClipping

The FrustumClipping class clips triangles that intersect...