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[MANTA] RNG's broken in RenderContext??


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  • From: Abe Stephens <abe@sci.utah.edu>
  • To: manta@sci.utah.edu
  • Subject: [MANTA] RNG's broken in RenderContext??
  • Date: Sat, 21 Jul 2007 16:14:49 -0600

Hi, can anyone (svn blame suggests the author of r1464) shed some light on why the rng field in render context would occasionally not be initialized? This (presumably race condition) has only occurred outside of Debug mode.

-Thanks
Abe

* 1 process 19749  0xb4eeaa60 in Manta::TiledImageTraverser::renderImage (this=0x84007a8, context=@0xab2ee2bc, image=0x8580d38)
    at /local/abe/Manta/Engine/ImageTraversers/TiledImageTraverser.cc:273
Current language:  auto; currently c++
(gdb) list
273                           context.rng->seed(x*xres+y);
274                           context.pixelSampler->renderFragment(context, frag);
275
276                           image->set(frag);
277                       }
278                   }
279               }
280           }
281           break;
282           default:
(gdb) p context
$1 = (const Manta::RenderContext &) @0xab2ee2bc: {rtrt_int = 0x83f26b0, channelIndex = 0, proc = 2, numProcs = 3,
  frameState = 0x83f28f8, loadBalancer = 0x83f3fe0, pixelSampler = 0x83f3fb0, renderer = 0x83eddf0, shadowAlgorithm = 0x83d4f10,
  camera = 0x8400720, scene = 0x8400960, storage_allocator = 0x84002c0, rng = 0x0}
(gdb) p context.pixelSampler
$2 = (class Manta::PixelSampler *) 0x83f3fb0
(gdb)



  • [MANTA] RNG's broken in RenderContext??, Abe Stephens, 07/21/2007

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