Hidden-surface determination
Visibility in 3D computer graphics / From Wikipedia, the free encyclopedia
In 3D computer graphics, hidden-surface determination (also known as shown-surface determination, hidden-surface removal (HSR), occlusion culling (OC) or visible-surface determination (VSD)) is the process of identifying what surfaces and parts of surfaces can be seen from a particular viewing angle. A hidden-surface determination algorithm is a solution to the visibility problem, which was one of the first major problems in the field of 3D computer graphics [citation needed]. The process of hidden-surface determination is sometimes called hiding, and such an algorithm is sometimes called a hider[citation needed]. When referring to line rendering it is known as hidden-line removal[citation needed]. Hidden-surface determination is necessary to render a scene correctly, so that one may not view features hidden behind the model itself, allowing only the naturally viewable portion of the graphic to be visible.
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