Issue No. 05 - September/October (2007 vol. 13)
<p><b>Abstract</b>—To eliminate the need to evaluate the intersection curves in explicit representations of surface cutouts or of trimmed faces in BReps of CSG solids, we advocate using Constructive Solid Trimming (CST). A CST face is the intersection of a surface with a Blist representation of a trimming CSG volume. We propose a new GPU-based CSG rendering algorithm that trims the boundary of each primitive using a Blist of its active zone. This approach is faster than the previously reported Blister approach, eliminates occasional speckles of wrongly colored pixels, and provides additional capabilities: painting on surfaces, rendering semitransparent CSG models, and highlighting selected features in the BReps of CSG models.</p>
GPU support for CSG rendering, CSG expressions for trimmed faces, CAD model visualization
J. Rossignac and J. Hable, "CST: Constructive Solid Trimming for Rendering BReps and CSG," in IEEE Transactions on Visualization & Computer Graphics, vol. 13, no. , pp. 1004-1014, 2007.