Search found 28 matches
- Sat Jun 24, 2017 4:28 am
- Forum: GPU
- Topic: Irregular grids
- Replies: 8
- Views: 3172
Re: Irregular grids
I dunno. The data structure itself looks the same as EXCELL to me. I think the summary I provided above, with snippets of prior literature, made the similarities quite clear. You mention that in your data structure "cells overlap each other" but this is not the case in the example color fi...
- Thu Jun 15, 2017 11:38 am
- Forum: Visuals
- Topic: My First Spectral rendering
- Replies: 5
- Views: 3163
Re: My First Spectral rendering
Since we're talking secondaries here, did you guys notice this article? "Building an Orthonormal Basis, Revisited"; Tom Duff, James Burgess, Per Christensen, Christophe Hery, Andrew Kensler, Max Liani, and Ryusuke Villemin: http://jcgt.org/published/0006/01/01/paper.pdf It describes a fast...
- Thu Jun 08, 2017 5:05 pm
- Forum: GPU
- Topic: Irregular grids
- Replies: 8
- Views: 3172
Re: Irregular grids
Following up the discussion from the "glitch pictures" thread: As with the Nemoto & Omachi and the Macro-regions paper, the resulting acceleration structures are indeed very similar, but not the same. You certainly have a point criticizing how the paper is positioned, but our view on ...
- Wed Jun 07, 2017 3:55 am
- Forum: GPU
- Topic: Irregular grids
- Replies: 8
- Views: 3172
Re: Irregular grids
Hey, That was a really interesting publication! You have, what seems to me, to be excellent rendering performance. Still it would be interesting to profile your build times to see where are the bottlenecks in the algorithm for each scene. You can probably easily get this data off something like nvpr...
- Wed Jun 07, 2017 12:22 am
- Forum: Visuals
- Topic: Glitch Pictures anyone?
- Replies: 75
- Views: 87692
Re: Glitch Pictures anyone?
The Nemoto & Omachi and Taranta et al. citations are certainly an oversight on our side, thanks for pointing this out. I was not aware of the first paper, and have no excuse for forgetting to cite the Macro/Micro regions papers. When writing the paper, we considered positioning the paper only a...
- Fri May 19, 2017 7:08 pm
- Forum: Visuals
- Topic: Glitch Pictures anyone?
- Replies: 75
- Views: 87692
Re: Glitch Pictures anyone?
Looking good! I might give this a try myself :). Are you looking at: http://www.kalojanov.com/data/irregular_grid.pdf ? That is an interesting paper! While it does have some similarities to macro-regions it looks a lot more similar to this old algorithm that dynamically increases and decreases the ...
- Wed May 17, 2017 5:17 am
- Forum: Visuals
- Topic: Glitch Pictures anyone?
- Replies: 75
- Views: 87692
Re: Glitch Pictures anyone?
Trying to implement 'Irregular grids'. Almost there. :) Heh. I have seen much worse than that. In case you need someone to talk with about this we published a couple of articles on gpgpu rectilinear grids some time back. If you eventually publish something with grids I would be interested to look a...
- Thu Apr 06, 2017 9:39 am
- Forum: General Development
- Topic: Intersection of ray with quadric surface for hobby ray tracer
- Replies: 6
- Views: 4118
Re: Intersection of ray with quadric surface for hobby ray tracer
BRL-CAD has OpenCL code for quite a lot of primitives: https://svn.code.sf.net/p/brlcad/code/brlcad/trunk/src/librt/primitives/ We are still working on porting primitives over but this is what we have already: ⋅ an equation solver (solves quartic, cubic, and quadric equations). ⋅&nbs...
- Wed Sep 02, 2015 11:09 am
- Forum: General Development
- Topic: pbrt-v3 source code now available
- Replies: 23
- Views: 18111
Re: pbrt-v3 source code now available
I did a change to the code. I had issues with some scenes with abnormal bounding boxes (too small) blowing up the program by triggering this assert : Assert(centroidBounds.pMax[dim] != centroidBounds.pMin[dim]); https://github.com/mmp/pbrt-v3/blob/master/src/accelerators/bvh.cpp#L527 So I changed th...
- Fri Aug 14, 2015 8:44 pm
- Forum: General Development
- Topic: pbrt-v3 source code now available
- Replies: 23
- Views: 18111
Re: pbrt-v3 source code now available
Thanks a lot for the code Matt! I have been using the CPU HLBVH builder code and been throwing all test scenes at it and so far it seems to be holding ok. I only had an issue with scenes where I had infinite size primitives (e.g. half-spaces in an extension I added) so I ended up removing those prio...