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A polygon mesh is a means of describing a collection of polygons that exploits the connectivity between adjacent polygons in a more efficient representation than a list of disjoint polygons. More precisely, a polygon mesh can be defined as a collection of polygons connected such that an edge is shared by at most two polygons and that an edge joins two vertices. Each vertex must be shared by at least two edges and all polygons must consist of a closed loop of connected edges. In the rendering library,
n meshes are described in terms of a collection of polygons whose edges are defined as an ordered vertex list.
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