Q: Quantitative 3D Polygon rendering in Mathematica?

*To*: mathgroup at smc.vnet.net*Subject*: [mg13522] Q: Quantitative 3D Polygon rendering in Mathematica?*From*: franki at aerodyne.com*Date*: Fri, 31 Jul 1998 04:33:33 -0400*Organization*: Deja News - The Leader in Internet Discussion*Sender*: owner-wri-mathgroup at wolfram.com

Greetings: First, preliminaries: 1. Please email responses to me and I will post summary of replies. 2. follow-up summary posting group will be comp.graphics.algorithms (since this is crossposted). Can anyone provide me either a Mathematica notebook or package, or some guidance on how to use Mathematica to address the following problem? Given a collection of 3D polygons (which defines some object), I'd like to use Mathematica to render an image (given a particular viewpoint and upvector). My ultimate goal is to apply my own shading function to each of the visible polygons, i.e., compute a quantitative physical radiance image from radiometric 1st principles. (I have my own reflectance and illumination models). Essentially, I want to use some set of Mathematica functionality as the hidden surface engine. What I need from this engine minimally would be the list of visible polygons, with projected unobscured (i.e., "clipped") areas. If Mathematica doesn't allow me to provide identity numbers to these polygons, I'd then like the visible polygon list to provide the clipped polygon definitions as projected onto the viewing plane. Even better would be the additional ability to define a variably sized pixel raster (X,Y) overlaid onto the projection plane, and derive a report of how much of each pixel (i,j) in the raster is filled by which polygon. Any pointers would be appreciated!! Regards, -----== Posted via Deja News, The Leader in Internet Discussion ==----- http://www.dejanews.com/rg_mkgrp.xp Create Your Own Free Member Forum