Hi, I just thought I'd mention that I tried some very limited RT volume rendering. I used an oct-tree (however you spell that) and treated it as nested...
Paul Kahler
phkahler@...
Jun 1, 2000 7:57 am
90
... I find the following pattern works really well: 00100010001 00000000000 10001000100 00000000000 00100010001 it's every 8th pixel, but my perception is that...
Paul Kahler
phkahler@...
Jun 1, 2000 8:00 am
91
... I assume that interpolates along triangles, as opposed to being along parallelograms, ie. 00111110001 01233321000 12345432100 01233321000 00111110001 and...
Factory
factory@...
Jun 4, 2000 2:05 pm
92
Hi, I'm wondering how people handle transformation of primitives. In many of the demos they just don't do it - mostly camera fly throughs. If you're optimizing...
Paul Kahler
phkahler@...
Jun 5, 2000 6:21 am
93
... one thing you might try is not to interpolate, but instead to trace one frame every odd pixel, and next frame every even pixel. for every pixel not traced...
Bruno Schödlbauer
bschoedlbauer@...
Jun 5, 2000 6:21 am
94
Isn't that just a 45' rotated quadtree?...
Magnus Jonsson
zeal@...
Jun 5, 2000 6:22 am
95
... No, actually if I follow your notation correctly its: 231323132 343434343 Where the 2's are the average of 4 1's 132313231 The 3's are the average of a 2...
Paul Kahler
phkahler@...
Jun 6, 2000 8:02 am
96
... Transforming a primitive is sometimes bad... just think about a sphere, really simple to solve, but after a transformation it may become a really complex...
Marco *PaN!* Foco
pansk@...
Jun 6, 2000 8:03 am
97
... Speaking with a friend time ago, he mentioned something in the same line of what you say. The AVI file format has a mode called SLI in which only even/odd...
Abel Bernabeu
abelbg@...
Jun 7, 2000 3:51 pm
98
Hi, I just posted 3 small (72K) programs demonstrating my RTRT progress. Also available is an explanation of how I do my pixel interpolation - see the page...
Paul Kahler
phkahler@...
Jun 9, 2000 12:13 am
99
______________________________________________________________________________ FAQ for realtime raytracing ...
Piero Foscari W.R.
wally@...
Jun 12, 2000 12:15 pm
100
If you're interested in optimized ray-triangle intersection code and statistics, then take a look at: http://www.ce.chalmers.se/staff/tomasm/raytri/ I have...
tompa@...
Jun 15, 2000 5:04 pm
101
Hello! Really interesting bench yours. (finally someone in the academic area struggling like me for perfect optimization!) Division is always a main worry, so...
Piero Foscari
wally@...
Jun 16, 2000 7:11 pm
102
Whops, sorry to everyone for the previous message, wasnt intended for the list. Always forget to use the correct reply adress... Anyway, should someone else...
Piero Foscari
wally@...
Jun 16, 2000 8:37 pm
103
Piero and others, ... Another place to look is "ERIT: A Collection of Efficient and Reliable Intersection Tests", http://www.acm.org/jgt/papers/Held97/ for the...
Eric Haines
erich@...
Jun 17, 2000 2:41 pm
104
Hehehe! Really incredible! In the very right moment i received your mail i was looking at that paper by Held! (dont remember how, but i have the .ps in my...
Piero Foscari
wally@...
Jun 17, 2000 3:42 pm
105
... I should mention this site in the RT News. However, it gets tricky - note that graphicspapers.com is essentially out of business, a shadow of its former...
Eric Haines
erich@...
Jun 18, 2000 2:30 pm
106
First things first: the SIGGRAPH Ray Tracing Roundtable SIG will be held at Thursday, 6-8 pm, at the Hilton Riverside, in the Oak Alley room. It's a short walk...
Eric Haines
erich@...
Jul 17, 2000 3:56 am
107
Jo... Quartz was supposed to post this "advertisement" here, but I can do it myself... You might (hopefully) be interested in the new raytracing 64kb intro by...
Cesare Castiglia
c.castiglia@...
Jul 17, 2000 6:36 pm
108
Hello Hope all of you at Siggraph are coming to the rountable. It could be nice to meet in advance... i'll be able to read mail (but not answer) from my...
Piero Foscari
wally@...
Jul 18, 2000 9:08 pm
109
Hi all!! I'm looking for a formulae for a general cylinder. I just find only (x-x0)^2 + (y-y0)^2 = Radius; I want to rotate a cylinder arround three axis with...
Dark Ice
darkice@...
Aug 10, 2000 7:20 pm
110
... For the fixed cylinder: x^2+y^2 = r^2 you can do simple ray tracing in 2 dimmensions. As soon as you rotate that cylinder you will introduce more terms...
Paul Kahler
phkahler@...
Aug 15, 2000 8:13 pm
111
... (x-x0)^2 + (y-y0)^2 = Radius; ... camera You can both rotate the xyz space you use in your calcs or (using pitagora's theorem): (P-O)^2 - ((P-O)*D)^2 =...
Marco *PaN!* Foco
pansk@...
Aug 15, 2000 8:17 pm
112
Quartz told me I should advertise my 4kb raytracing-intro here, so here it is. It got 5th at Assembly'2k and can be downloaded from ...
Miika Sell
itchi@...
Aug 16, 2000 4:31 pm
113
I've been able to obtain by myself a 4th degree equation for the ray-torus intersection and I already know how to calculate the normal at a given torus point...
abelbg@...
Aug 28, 2000 4:23 pm
114
Hi, The list is not very active lately, so I thought I'd give a little food for thought. I've been thinking a lot about Bounding Volume Hierarchys (BVH) lately...
Paul Kahler
phkahler@...
Aug 28, 2000 4:24 pm
115
anybody got with that? here is the page http://www.acm.org/pubs/citations/journals/tog/1994-13-4/p376- paglieroni/ using this or some other fast raycasting...
malkia eastern.analog
malkia@...
Aug 28, 2000 4:24 pm
116
When I was looking for solutions to the quartic, I ended up asking many of the questions you have. A couple people suggested the book: Mathematical Thought...
Paul Kahler
phkahler@...
Aug 28, 2000 9:45 pm
117
... ... Just one thing... to demonstrate those formulas you should try this way: 1) Make a decision tree of all the conditions in the formula 2) Demonstrate,...
Marco *PaN!* Foco
pansk@...
Aug 31, 2000 3:55 pm
118
Hi, Im a new member of this e-list. Im coder of elerium core, a spanish demogroup. I have been programing rayt scenes this last days, but my maths have touch...
