bvh_builder.cpp

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// Copyright(c) 2019, Sergen Eren
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//	Version 1.0: Sergen Eren, 29/11/2019
//
// File: This is the implementation file for BVH_Builder class functions 
//
//-----------------------------------------------

#include "bvh_builder.h"

extern "C" void BuildBVH(BVH& bvh, GPU_VDB* volumes, int numVolumes, AABB &sceneBounds, bool debug_bvh);

// Build the BVH that will be sent to the render kernel
bvh_error_t BVH_Builder::build_bvh(std::vector<GPU_VDB> vdbs, int num_volumes, AABB &sceneBounds) {
	
	volumes = new GPU_VDB[num_volumes];
	
	checkCudaErrors(cudaMalloc(&volumes, num_volumes * sizeof(GPU_VDB)));
	checkCudaErrors(cudaMemcpy(volumes, vdbs.data(), num_volumes * sizeof(GPU_VDB), cudaMemcpyHostToDevice));

	BuildBVH(bvh, volumes, num_volumes, sceneBounds, m_debug_bvh);
	
	cudaFree(volumes);
	volumes = nullptr;

	return BVH_NO_ERR;
	
}