everson@CompSci.Bristol.AC.UK (Phill Everson ) (01/17/90)
We're having a number of problems with Sun Phigs (v1.1) here running on SS1s and Sparc370's under SunOS4.03. Sun UK answer centre is baffled, but I'm sure someone somewhere can help ... If anyone could give any pointers to solutions or any sample code of greater complexity (and usefulness) than the demos included with the package please contact me. I will summarize to the net if there is significant reponse. 1. We are using polyhedron3 with a lighting model and don't see any apparent differences on the rendered model with the on or off. We use the following code to set up the light sources: Plightsrcbundl lrep[4]; lrep[0].type = PLIGHT_POSITIONAL; lrep[0].rec.positional.colour.type = PINDIRECT; lrep[0].rec.positional.colour.val.index = PYELLOW; lrep[0].rec.positional.pos.x = WC_MAX; lrep[0].rec.positional.pos.y = 0.0; lrep[0].rec.positional.pos.z = 0.0; lrep[0].rec.positional.coef[0] = 0.0; lrep[0].rec.positional.coef[1] = 1.0; lrep[1].type = PLIGHT_AMBIENT; lrep[1].rec.ambient.colour.type = PINDIRECT; lrep[1].rec.ambient.colour.val.index = PCYRAN; lrep[2].type = PLIGHT_POSITIONAL; lrep[2].rec.positional.colour.type = PINDIRECT; lrep[2].rec.positional.colour.val.index = PYELLOW; lrep[2].rec.positional.pos.x = WC_MAX * -1.0; lrep[2].rec.positional.pos.y = 5.0; lrep[2].rec.positional.pos.z = 0.0; lrep[2].rec.positional.coef[0] = 0.0; lrep[2].rec.positional.coef[1] = 1.0; popenws(WS, (Pconnid)canvas, canwst); psetlightsrcrep (WS, 1, &(lrep[0])); psetlightsrcrep (WS, 2, &(lrep[1])); psetlightsrcrep (WS, 3, &(lrep[2])); 2) Attenuation Coefficients. What are sensible values to plug in to get a noticable effect on the rendered model from the light source? 3) Rendering to pixrects. Is there *any* way of rendering a model into a pixrect directly rather than a workstation/canvas using Sun Phigs so that we can the do a pw_stencil() of that pixrect on top of another image? Any help, pointers, hints or sample code on any of the above problems would be deeply appreciated. Please email and I will summarize. -- Phillip G. Everson Senior Software Engineer Medical Imaging Philips Radiotherapy Systems Dept. Computer Science Horfield Road, Bristol, UK Bristol University, UK