[PyCUDA] C++ to Python code conversion help

[Chris]

Could I get some insight on how to convert this kernel code from C++ to
Pycuda?

cudaExtent volumeSize = make_cudaExtent(128, 128, 128);

//sweep construction convert distance to material if needed (sweepfun == 1)
void convert_dis2material(cudaExtent volumeSize,int originaldim,int
sweepfun)
{
// Specify texture
struct cudaResourceDesc resDescsurface;
memset(&resDescsurface, 0, sizeof(resDescsurface));
resDescsurface.resType = cudaResourceTypeArray;
resDescsurface.res.array.array = d_volumeArray1; //blue

// Specify texture object parameters
struct cudaTextureDesc texDescsurface;
memset(&texDescsurface, 0, sizeof(texDescsurface));
texDescsurface.addressMode[0] = cudaAddressModeClamp;
texDescsurface.addressMode[1] = cudaAddressModeClamp;
texDescsurface.addressMode[2] = cudaAddressModeClamp;
texDescsurface.filterMode = cudaFilterModePoint;
texDescsurface.readMode = cudaReadModeElementType;
texDescsurface.normalizedCoords = 0;

cudaTextureObject_t texObj1;
cudaCreateTextureObject(&texObj1, &resDescsurface, &texDescsurface, NULL);
surfaceintegral(texObj1,originaldim,volumeSize);
//finishing integration on blue

cudaChannelFormatDesc channelDesc = cudaCreateChannelDesc<VolumeType>();
dim3 dimBlock1 (8,8,8);
dim3 dimGrid1
((volumeSize.width+dimBlock1.x-1)/dimBlock1.x,(volumeSize.height+dimBlock1.y-1)/dimBlock1.y,(volumeSize.depth+dimBlock1.z-1)/dimBlock1.z);


float *d_volume;
checkCudaErrors(cudaMalloc((void**)&d_volume,
volumeSize.depth*volumeSize.depth*volumeSize.depth*sizeof(float)));



dis2material_kernel<<<dimGrid1,dimBlock1>>>(d_volume,texObj1,sweepfun,volumeSize,originaldim,maxnegdis,objcoorminx,objcoormaxx,objcoorminy,objcoormaxy,objcoorminz,objcoormaxz);
cudaDeviceSynchronize();



// create 3D array
cudaFreeArray(d_volumeArray1);
checkCudaErrors(cudaMalloc3DArray(&d_volumeArray1, &channelDesc,
volumeSize));
// copy data to 3D array
cudaMemcpy3DParms copyParams = {0};
copyParams.srcPtr = make_cudaPitchedPtr(d_volume,
volumeSize.width*sizeof(VolumeType), volumeSize.width, volumeSize.height);
copyParams.dstArray = d_volumeArray1;
copyParams.extent = volumeSize;
copyParams.kind = cudaMemcpyDeviceToDevice;
checkCudaErrors(cudaMemcpy3D(&copyParams));

cudaFree(d_volume);


cudaDestroyTextureObject(texObj1); //destroy texobj before update the new
d_volumeArray to it.
}



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