Geometric primitives
Triangles
- Most primitives based on triangles
- Vertex v(i) is x,y,z
- Triangle has three vertices (!)
- Vertex structure can contain additional information
- Counter-clockwise vertices, triangle front-facing
- Clockwise vertices, triangle back-facing
- Back-facing triangles usually not drawn
Polygons
- Three or more vertices
- Must be planar
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