Function render

cpp/5_Domain_Specific/volumeRender/volumeRender.cpp:161–182

render image using CUDA

// render image using CUDA
void render()
{
    copyInvViewMatrix(invViewMatrix, sizeof(float4) * 3);

    // map PBO to get CUDA device pointer
    uint *d_output;
    // map PBO to get CUDA device pointer
    checkCudaErrors(cudaGraphicsMapResources(1, &cuda_pbo_resource, 0));
    size_t num_bytes;
    checkCudaErrors(cudaGraphicsResourceGetMappedPointer((void **)&d_output, &num_bytes, cuda_pbo_resource));
    // printf("CUDA mapped PBO: May access %ld bytes\n", num_bytes);

    // clear image
    checkCudaErrors(cudaMemset(d_output, 0, width * height * 4));

    // call CUDA kernel, writing results to PBO
    render_kernel(gridSize, blockSize, d_output, width, height, density, brightness, transferOffset, transferScale);

    getLastCudaError("kernel failed");

    checkCudaErrors(cudaGraphicsUnmapResources(1, &cuda_pbo_resource, 0));
}

// display results using OpenGL (called by GLUT)
void display()