Sungjoo Kang

I created volume data import SOP node with HDK. (windows 7 64bit, MSVC2005).

this SOP_Node is volume raw data file import node

OP_ERROR SOP_GETCELLDATA::cookMySop(OP_Context &context)
{

float now = context.myTime;

gdp->clearAndDestroy();

volumeGdp = (GU_PrimVolume *)GU_PrimVolume::build(gdp);
volumeGdp->setTransform4(xform3);
voxelHandle = volumeGdp->getVoxelWriteHandle();
voxelHandle->size(global_grid.grid_x, global_grid.grid_y, global_grid.grid_z);

…

for(int i=0; i < localGrid.local_x; ++i) {
for(int j=0; j < localGrid.local_y; ++j) {
for(int k=0; k < localGrid.local_z; ++k) {
localIndex = (i * localGrid.local_y + j) * localGrid.local_z + k;
voxelHandle->setValue(i + localOffset.offset_x, j + localOffset.offset_y, k + localOffset.offset_z, (float)(internalBuffer * intensity + offset));
}
}
}

…

gdp->notifyCache(GU_CACHE_ALL);
return error();
}

this code makes volume primitive very well. but when current frame was moved.
H11 crash this line.
gdp->clearAndDestory() //

without gdp->clearAndDestory() code
when frame moved i get new other volume primitive.

this code (gdp->clearAndDestory()) is works very well except volume primitive.

How can I solve this problem.?

hello. Im developing Some SOP node with HDK, CUDA.
it makes polygon geometry using raymarching cube algorithm.
but results is very heavy, rough surface and too many voxels.

so
I need different volume to polygon alogorithm like isosurface on houdini.
can i find some document or information.?

anyway. CUDA is very cool!.