Creating a complex 3D surface or object by combining primitive objects
CSG objects can be represented by binary trees, where leaves represent primitives, and nodes represent operations. In this figure, the nodes are labeled ∩ for intersection, ∪ for union, and — for difference.
Constructive solid geometry (CSG; formerly called computational binary solid geometry) is a technique used in solid modeling. Constructive solid geometry allows a modeler to create a complex surface or object by using Boolean operators to combine simpler objects,[1] potentially generating visually complex objects by combining a few primitive ones.[2][3]
In 3D computer graphics and CAD, CSG is often used in procedural modeling. CSG can also be performed on polygonal meshes, and may or may not be procedural and/or parametric.
Contrast CSG with polygon mesh modeling and box modeling.
^Foley, James D. (1996), "12.7 Constructive Solid Geometry", Computer Graphics: Principles and Practice, Addison-Wesley Professional, pp. 557–558, ISBN 9780201848403,
^Roth, Scott (1982). "Ray Casting for Modeling Solids". Computer Graphics and Image Processing. 18 (2): 109–144. doi:10.1016/0146-664X(82)90169-1.
^Bloomenthal, Jules; Bajaj, Chandrajit (1997), "5.2.5 Intersection with CSG Trees", Introduction to Implicit Surfaces, Morgan Kaufmann, pp. 178–180, ISBN 9781558602335.
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