Hi, Quick question. consider a point P is written as a column vector tranformed by a 4x4 T using the equation P'= TP. Now take a plane equation and represent...
Paul Kahler
phkahler@...
Jul 5, 2001 7:01 pm
253
If I recall correctly, to transform a plane you need to transform the 4x1 vector (representing the plane equation coefficients) by the transpose of the inverse...
Mark Wayland
mwayland@...
Jul 9, 2001 9:30 am
254
Just in time for Friday afternoon, when there's no time to start a new project: http://www.raytracingnews.org/rtnv14n1.html The Ray Tracing News, volume 14...
Eric Haines
erich@...
Aug 10, 2001 1:19 am
255
Hello, I just thought I'd announce a RTRT project a friend and I have been working on. It's a chess game with a ray traced display. Not available for public...
Paul Kahler
phkahler@...
Aug 21, 2001 7:42 am
256
So well, Siggraph is over. What about this year? Ofcourse of major interest to us was the Interactive RT course organized by Slusallek and featuring also...
Piero Foscari
wally@...
Aug 23, 2001 9:17 am
257
I think the problem wasn't speed but getting the geometry or photon map to fit into the memory of a single machine. Their approach was interesting in that it...
yeehector@...
Aug 24, 2001 6:21 am
258
... Afair they just split the scene among the various pcs... and in a quite odd way losing spatial coherency. No smart caching nor else. But if someone could...
wally@...
Aug 24, 2001 6:30 am
259
... For load balancing. In path tracing you have to bounce a ray off the surface and if you're importance sampling the brdf you're not quite sure where it will...
yeehector@...
Aug 28, 2001 10:38 am
260
... the ... Hmm, ofcourse it gets balanced but as far as i can see this merely makes all running processes as slow as the slowest one. If you spatially...
wally@...
Aug 28, 2001 10:57 am
261
... I hope you mean CPU bandwidth and not memory. When I was messing with my crude terrains I found memory access not to be an issue. I went from my old...
Paul Kahler
phkahler@...
Aug 30, 2001 6:17 pm
262
... Frankly, I don't think that's it at all. Rather, the simple reason that commercial packages still include scanline support is that ray-tracing the eye...
Matt Pharr
mmp@...
Aug 30, 2001 7:32 pm
263
Hi, The first rev of rtChess is now available for playing. Surf over to http://www.newimage.com/~rhk/rtchess Windows and Linux versions are available. Give us...
Paul Kahler
phkahler@...
Sep 3, 2001 7:25 pm
264
Whooops, sorry for the huge delay! Work is eating all my free time... ... with my ... from my ... improvement. ... could even ... performance ... Well, dont...
... that ... tracing the ... Obviously ... scanline ... you're ... culling, etc. Hmm, it´s a lot simpler to write a basic raytracer than a full scanline...
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the realtime_raytracing group. File :...
realtime_raytracing@y...
Nov 9, 2001 4:53 pm
267
I've been lurking for a while, reading through the archives while I've been working on my realtime raytracer, but I just subscribed, so I thought it's time to...
... You might check http://www1.acm.org/pubs/tog/resources/RTNews/html/rtnv14n1.html#art3 and the article after this one for some tidbits, if you haven't...
Eric Haines
erich@...
Nov 28, 2001 2:58 am
269
... This is one of the reasons I chose an Octree. I don't analyze the entire scene to build the tree. Some people subdivide the nodes if there are more than...
Paul Kahler
phkahler@...
Dec 3, 2001 1:33 pm
270
Hi, Last night I was looking at the torus again. I've sketched out a nice way to do the intersection test and I'll be writing it up for general consumption...
Paul Kahler
phkahler@...
Dec 3, 2001 1:36 pm
271
... It's exactly what I'm doing in my rtrt engine =) It works well. ... I "optimized" a "standard quartic solver" I found somewhere. I'll let you know...
Marco *PaN* Foco
pan@...
Dec 3, 2001 3:19 pm
272
... let you ... Wasnt it from GGems? :) Afaik the two most used methods (RT-wise) are 1) some flavour of the general analytic quartic formula 2) root isolation...
Short version: there's a pointer to code at the end of my note. ... Avoid Sturm, it's wicked slow for quartics, vs. the closed form. The closed form thing is...
Eric Haines
erich@...
Dec 5, 2001 12:41 pm
274
Hi guys, Thanks for all the pointers to root solvers and torus intersections. I finally have some donuts spinning in a test program. I implemented the method I...
Paul Kahler
phkahler@...
Jan 7, 2002 3:13 pm
275
Hey all, just two links: lRay was updated and seems to have implicit surfaces now, looks pretty nice: http://www.cfxweb.net/~lyc/lray.html Also check out this...
Hi.... First time I write here... Well im working on a RTRT (like almost everyone here) and I'm planning on implementing spatial subdivision... son guy told me...
Hi.. Yes, they do add overhead to simple scenes. However, these are generally VERY simple scenes. For even a few (2 or 3 thousand) polygons, a spatial...
I'm interested in writing a demo and I noticed that most of the demos run under DOS. Is this the standard, or does this have more to do with the fact that...
... if you do it under linux, definitely go for the intel compiler. for linux, it can be downloaded for free, and can be up to two times as fast as gcc. (in...
Ingo Wald
wald@...
Mar 21, 2002 4:56 pm
280
Hi Tom! ... What exactly do you mean? A Java applet (or similar)? If so, http://equinox.planet-d.net/ have some rather nice java-applet demos. Even some that...
... As far as I know Intel compiler is available for win32 too (don't know if it's free). My opinion (expressed in a mail this list never received, because...
