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    CST: Constructive Solid Trimming for Rendering BReps and CSG

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    06-16.pdf (1.645Mb)
    Date
    2006
    Author
    Hable, John
    Rossignac, Jaroslaw R.
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    Abstract
    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, which 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.
    URI
    http://hdl.handle.net/1853/13135
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    • GVU Center Technical Reports [542]

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