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[Manta] Re: Manta help


Chronological Thread 
  • From: Thiago Ize <thiago@cs.utah.edu>
  • To: James Bigler <bigler@cs.utah.edu>
  • Cc: Eli Ribble <eli.ribble@gmail.com>, wald@sci.utah.edu, manta@sci.utah.edu
  • Subject: [Manta] Re: Manta help
  • Date: Thu, 16 Aug 2007 11:55:58 -0700
James Bigler wrote:
On Aug 16, 2007, at 10:43 AM, Eli Ribble wrote:

Thanks for the information and the help - you wouldn't happen to know who the person is that is working on the kd-tree...?

Thiago Ize and Ingo Wald are working on this. I haven't been told anything beyond the fact that they are working on it.

Yeah, we need to make a nice kdtree so that I have something legit to compare my BSP tree. Once the kdtree is working correctly I'll add it into manta.
Would it be possible for me to get a login to work on the wiki? If so, how do I go about doing that?

Just create an account and edit away.

The build I'm using is from the trunk. I'd like to try out the 'authorized version' that is mentioned online. What does it take to get access to the authorized version?

The authorized contains some additional grid based acceleration structures described in the 2006 SIGGRAPH paper. There is a patent application pending on the algorithm, which is why we put it in an authorized section. If the interested parties give consent (Ingo and Thiago are good people to ask), we can give you permission to check out those files.
I'm OK with anyone in SCI/CS having access. And since Eli is working for SCI (that is correct, right?) I have no issues. By the way, I also don't have issues with outside people having access if they ask. I just don't want the grid code to be MIT licensed, which it would be if it were officially in manta, and have that cause problems in the future (I'm not a lawyer, so I'm just being conservative).

Also, I've gotten manta to build on my 64-bit laptop with Ubuntu and a dev environment, as well as on my 32-bit desktop with Ubuntu. I'm having a problem with the standalone runtime, /bin/manta. When I run it on my laptop it works great, shows me the sphere and checkered plane, but on my desktop I get the following output:

eli@Asmodeus:~/manta/Manta/bin$ ./manta
/home/eli/manta/Manta/Model/Cameras/PinholeCamera.cc line: 122 Ambiguous up direciton... lookat = 0 0 0.3, eye = 3 3 2, direciton = nan nan nan, n = nan nan nan, up = 0 0 1, v = nan nan nan

This is a known bug recently introduced by Thiago. He is working on a fix.
I have yet to be able to replicate it on my two machines (works for Solomon too). Once I get back in SLC and can have access to a machine for which it doesn't work I'll try and fix it.
James


Thiago



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