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frustum clipping
Frustum clipping discards or trims geometry that falls outside the pyramid-shaped volume the camera can actually see.
The view frustum is the truncated pyramid of space visible to the camera. Anything wholly outside it cannot appear on screen, so clipping removes it, and geometry straddling the boundary is cut precisely at the frustum's edges. 'Full-frustum clipping' means handling all six faces correctly, which avoids both wasted work and visual artifacts from primitives poking outside the view.
See also
- fragmentA fragment is a candidate pixel produced when the GPU rasterizes a triangle, before it is finalized on screen.
- framebufferA framebuffer is the block of memory holding the image being rendered, essentially the picture that becomes the screen.
- indexed drawAn indexed draw renders geometry using a list of indices that reference a shared pool of vertices, so vertices can be reused.