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[Manta] Re: Manta: Direct isosurfacing using octrees


Chronological Thread 
  • From: Shreekanth Pavar <shreekanth.pavar@ucl.ac.uk>
  • To: Aaron Knoll <knolla@gmail.com>
  • Cc: MANTA <manta@sci.utah.edu>
  • Subject: [Manta] Re: Manta: Direct isosurfacing using octrees
  • Date: Sun, 21 Oct 2007 19:46:10 +0100
Hi Aaron

I'm currently trying to render some of our datasets using the Octree Direct
Isosurfacing code however I get a segmentation fault in the (recursive)
function:

IsosurfaceOctreeVolume::single_traverse_node

when trying to retrieve the first data node at this line:

OctNode& node = octdata->get_node(depth, node_index);

The arguments are both supplied hardcoded to the value 0 in the calling function
(IsosurfaceOctreeVolume::single_intersect) so my guess is that there is
something wrong with my Octree data itself even though the octree volume
builder appeared to create it ok from the .raw volume data file that I
supplied.

Do you know if there is any way to examine the data directly for faults? Also,
are any sample octree volumes available which I could use to confirm that the
problem lies with the data and not in the code?

Many Thanks


--
Shree Pavar
Centre for Computational Science, UCL
http://www.chem.ucl.ac.uk/ccs/





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