void Start()
{
Stopwatch sw = new Stopwatch();
sw.Start();
Scene scene = new Scene(true);
bvhScene = new BVHScene(scene.triangles, scene.vertices);
Debug.Log("bvhScene.triangles.Count = " + bvhScene.triangles.Count);
Debug.Log(" ================================ ");
var bvhData = new CPU_BVHData(bvhScene);
CPU_SBVHBuilder.Build(bvhData);
Debug.Log("bvhData.triangles.Count = " + bvhData.triIndices.Count);
Debug.Log(" ================================ ");
// debug gpu bvh
GPU_BVHData gpuData = new GPU_BVHData().Generate(bvhData);
Debug.Log("gpuData.nodes.Count = " + gpuData.nodes.Count);
Debug.Log("gpuData.woopTris.Count = " + gpuData.woopTris.Count);
Debug.Log("gpuData.triIndices.Count = " + gpuData.triIndices.Count);
root = bvhData.root;
sw.Stop();
string log = "Build successfully, time: " + sw.ElapsedMilliseconds + " ms";
Debug.Log(log);
}
// Start is called before the first frame update
void Start()
{
if (gpuBVH == null)
{
Debug.Log("No cached BVH data found, building BVH now.");
_theScene = new Scene(true);
var bvhScene = new BVHScene(_theScene.triangles, _theScene.vertices);
var cpuBVH = new CPU_BVHData(bvhScene);
CPU_SBVHBuilder.Build(cpuBVH);
gpuBVH = new GPU_BVHData().Generate(cpuBVH);
}
else
{
_theScene = new Scene(true);
Debug.Log("Using cached BVH data.");
}
// bind texture2darray
var diffuseTexLen = _theScene.diffuseTextures.Count;
if (_theScene.diffuseTextures.Count > 0)
{
var tex = _theScene.diffuseTextures[0];
_diffuseTextures = new Texture2DArray(tex.width, tex.height, diffuseTexLen, tex.format, true);
for (int i = 0; i < diffuseTexLen; i++)
{
Graphics.CopyTexture(_theScene.diffuseTextures[i], 0, _diffuseTextures, i);
}
}
// bvh
CreateComputeBuffer(ref _nodesBuffer, gpuBVH.nodes, 16);
CreateComputeBuffer(ref _woopTrisBuffer, gpuBVH.woopTris, 16);
CreateComputeBuffer(ref _triIndicesBuffer, gpuBVH.triIndices, 4);
// per vertex
CreateComputeBuffer(ref _verticesBuffer, _theScene.vertices, 12);
CreateComputeBuffer(ref _normalsBuffer, _theScene.normals, 12);
CreateComputeBuffer(ref _uv0sBuffer, _theScene.uv0s, 8);
// per triangle
CreateComputeBuffer(ref _trianglesBuffer, _theScene.triangles, 12);
CreateComputeBuffer(ref _materialsBuffer, _theScene.materials, 144);
CreateComputeBuffer(ref _matIdxBuffer, _theScene.matIndices, 4);
}
