pierre@Autodesk.COM (Pierre Malraison) (03/30/91)
Renderman sipports a wide variety of surface types, but none of them are allowed to be trimmed. 1) Has anyone come up with a reasonable way to display trimmed surfaces (e.g. a NURB with a hole in the midddle) in Renderman? 2) If not, is it planned for any future revision of Renderman. More generally,besides CSG what about B-reps? -- Pierre Malraison U.S. Snail: Autodesk ,Inc. 2320 Marinship Way,Sausalito CA 94965 e-mail: pierre@acad.uu.net Opinions expressed above purely personal.
zap@lysator.liu.se (Zap Andersson) (04/01/91)
pierre@Autodesk.COM (Pierre Malraison) writes: >Renderman sipports a wide variety of surface types, but none of them are allowed to >be trimmed. First, are we discussing here the STANDARD Renderman, or a particular implem- mentation, SUch as MacRenderman or Autodesk Photorealistic Renderman Renderer? The STANDARD supports trim curves very well. I read from page 249 in my issue of the "Renderman Companion": Trim Curves Using an optional capability defined under the RenderMan Interface, and application can cut out arbitrary regions of a non uniform rational B-spline (NURB) surface. It then goes on to explain Trim-curves and the RiTrimCurve() interface call. So ewhere's the problem? >1) Has anyone come up with a reasonable way to display trimmed surfaces >(e.g. a NURB with a hole in the midddle) in Renderman? >2) If not, is it planned for any future revision of Renderman. >More generally,besides CSG what about B-reps? >-- >Pierre Malraison >U.S. Snail: Autodesk ,Inc. 2320 Marinship Way,Sausalito CA 94965 >e-mail: pierre@acad.uu.net >Opinions expressed above purely personal. -- * * * * * * * * * * * * * * * * * (This rent for space) * My signature is smaller than * Be warned! The letter 'Z' is Copyright 1991 * yours! - zap@lysator.liu.se * by Zap Inc. So are the colors Red, Green and * * * * * * * * * * * * * * * * * Greenish-yellow (Blue was taken by IBM)