[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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