2021-05-20 10:49:33 +00:00
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// Copyright 2009-2021 Intel Corporation
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2020-12-19 13:50:20 +00:00
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// SPDX-License-Identifier: Apache-2.0
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#pragma once
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#include "heuristic_binning.h"
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namespace embree
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{
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namespace isa
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{
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/*! Performs standard object binning */
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template<typename PrimRef, size_t BINS>
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struct UnalignedHeuristicArrayBinningSAH
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{
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typedef BinSplit<BINS> Split;
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typedef BinInfoT<BINS,PrimRef,BBox3fa> Binner;
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typedef range<size_t> Set;
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__forceinline UnalignedHeuristicArrayBinningSAH () // FIXME: required?
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: scene(nullptr), prims(nullptr) {}
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/*! remember prim array */
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__forceinline UnalignedHeuristicArrayBinningSAH (Scene* scene, PrimRef* prims)
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: scene(scene), prims(prims) {}
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const LinearSpace3fa computeAlignedSpace(const range<size_t>& set)
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{
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Vec3fa axis(0,0,1);
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uint64_t bestGeomPrimID = -1;
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/*! find curve with minimum ID that defines valid direction */
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for (size_t i=set.begin(); i<set.end(); i++)
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{
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const unsigned int geomID = prims[i].geomID();
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const unsigned int primID = prims[i].primID();
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const uint64_t geomprimID = prims[i].ID64();
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if (geomprimID >= bestGeomPrimID) continue;
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const Vec3fa axis1 = scene->get(geomID)->computeDirection(primID);
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if (sqr_length(axis1) > 1E-18f) {
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axis = normalize(axis1);
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bestGeomPrimID = geomprimID;
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}
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}
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return frame(axis).transposed();
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}
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const PrimInfo computePrimInfo(const range<size_t>& set, const LinearSpace3fa& space)
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{
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auto computeBounds = [&](const range<size_t>& r) -> CentGeomBBox3fa
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{
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CentGeomBBox3fa bounds(empty);
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for (size_t i=r.begin(); i<r.end(); i++) {
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Geometry* mesh = scene->get(prims[i].geomID());
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bounds.extend(mesh->vbounds(space,prims[i].primID()));
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}
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return bounds;
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};
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const CentGeomBBox3fa bounds = parallel_reduce(set.begin(), set.end(), size_t(1024), size_t(4096),
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CentGeomBBox3fa(empty), computeBounds, CentGeomBBox3fa::merge2);
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return PrimInfo(set.begin(),set.end(),bounds);
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}
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struct BinBoundsAndCenter
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{
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__forceinline BinBoundsAndCenter(Scene* scene, const LinearSpace3fa& space)
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: scene(scene), space(space) {}
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/*! returns center for binning */
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__forceinline Vec3fa binCenter(const PrimRef& ref) const
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{
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Geometry* mesh = (Geometry*) scene->get(ref.geomID());
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BBox3fa bounds = mesh->vbounds(space,ref.primID());
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return embree::center2(bounds);
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}
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/*! returns bounds and centroid used for binning */
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__forceinline void binBoundsAndCenter(const PrimRef& ref, BBox3fa& bounds_o, Vec3fa& center_o) const
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{
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Geometry* mesh = (Geometry*) scene->get(ref.geomID());
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BBox3fa bounds = mesh->vbounds(space,ref.primID());
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bounds_o = bounds;
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center_o = embree::center2(bounds);
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}
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private:
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Scene* scene;
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const LinearSpace3fa space;
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};
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/*! finds the best split */
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__forceinline const Split find(const PrimInfoRange& pinfo, const size_t logBlockSize, const LinearSpace3fa& space)
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{
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if (likely(pinfo.size() < 10000))
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return find_template<false>(pinfo,logBlockSize,space);
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else
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return find_template<true>(pinfo,logBlockSize,space);
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}
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/*! finds the best split */
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template<bool parallel>
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const Split find_template(const PrimInfoRange& set, const size_t logBlockSize, const LinearSpace3fa& space)
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{
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Binner binner(empty);
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const BinMapping<BINS> mapping(set);
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BinBoundsAndCenter binBoundsAndCenter(scene,space);
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bin_serial_or_parallel<parallel>(binner,prims,set.begin(),set.end(),size_t(4096),mapping,binBoundsAndCenter);
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return binner.best(mapping,logBlockSize);
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}
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/*! array partitioning */
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__forceinline void split(const Split& split, const LinearSpace3fa& space, const Set& set, PrimInfoRange& lset, PrimInfoRange& rset)
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{
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if (likely(set.size() < 10000))
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split_template<false>(split,space,set,lset,rset);
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else
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split_template<true>(split,space,set,lset,rset);
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}
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/*! array partitioning */
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template<bool parallel>
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__forceinline void split_template(const Split& split, const LinearSpace3fa& space, const Set& set, PrimInfoRange& lset, PrimInfoRange& rset)
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{
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if (!split.valid()) {
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deterministic_order(set);
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return splitFallback(set,lset,rset);
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}
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const size_t begin = set.begin();
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const size_t end = set.end();
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CentGeomBBox3fa local_left(empty);
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CentGeomBBox3fa local_right(empty);
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const int splitPos = split.pos;
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const int splitDim = split.dim;
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BinBoundsAndCenter binBoundsAndCenter(scene,space);
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size_t center = 0;
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if (likely(set.size() < 10000))
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center = serial_partitioning(prims,begin,end,local_left,local_right,
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[&] (const PrimRef& ref) { return split.mapping.bin_unsafe(ref,binBoundsAndCenter)[splitDim] < splitPos; },
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[] (CentGeomBBox3fa& pinfo,const PrimRef& ref) { pinfo.extend_center2(ref); });
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else
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center = parallel_partitioning(prims,begin,end,EmptyTy(),local_left,local_right,
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[&] (const PrimRef& ref) { return split.mapping.bin_unsafe(ref,binBoundsAndCenter)[splitDim] < splitPos; },
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[] (CentGeomBBox3fa& pinfo,const PrimRef& ref) { pinfo.extend_center2(ref); },
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[] (CentGeomBBox3fa& pinfo0,const CentGeomBBox3fa& pinfo1) { pinfo0.merge(pinfo1); },
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128);
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new (&lset) PrimInfoRange(begin,center,local_left);
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new (&rset) PrimInfoRange(center,end,local_right);
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assert(area(lset.geomBounds) >= 0.0f);
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assert(area(rset.geomBounds) >= 0.0f);
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}
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void deterministic_order(const range<size_t>& set)
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{
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/* required as parallel partition destroys original primitive order */
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std::sort(&prims[set.begin()],&prims[set.end()]);
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}
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void splitFallback(const range<size_t>& set, PrimInfoRange& lset, PrimInfoRange& rset)
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{
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const size_t begin = set.begin();
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const size_t end = set.end();
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const size_t center = (begin + end)/2;
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CentGeomBBox3fa left(empty);
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for (size_t i=begin; i<center; i++)
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left.extend_center2(prims[i]);
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new (&lset) PrimInfoRange(begin,center,left);
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CentGeomBBox3fa right(empty);
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for (size_t i=center; i<end; i++)
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right.extend_center2(prims[i]);
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new (&rset) PrimInfoRange(center,end,right);
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}
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private:
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Scene* const scene;
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PrimRef* const prims;
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};
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/*! Performs standard object binning */
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template<typename PrimRefMB, size_t BINS>
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struct UnalignedHeuristicArrayBinningMB
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{
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typedef BinSplit<BINS> Split;
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typedef typename PrimRefMB::BBox BBox;
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typedef BinInfoT<BINS,PrimRefMB,BBox> ObjectBinner;
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static const size_t PARALLEL_THRESHOLD = 3 * 1024;
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static const size_t PARALLEL_FIND_BLOCK_SIZE = 1024;
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static const size_t PARALLEL_PARTITION_BLOCK_SIZE = 128;
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UnalignedHeuristicArrayBinningMB(Scene* scene)
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: scene(scene) {}
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const LinearSpace3fa computeAlignedSpaceMB(Scene* scene, const SetMB& set)
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{
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Vec3fa axis0(0,0,1);
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uint64_t bestGeomPrimID = -1;
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/*! find curve with minimum ID that defines valid direction */
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for (size_t i=set.begin(); i<set.end(); i++)
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{
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const PrimRefMB& prim = (*set.prims)[i];
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const unsigned int geomID = prim.geomID();
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const unsigned int primID = prim.primID();
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const uint64_t geomprimID = prim.ID64();
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if (geomprimID >= bestGeomPrimID) continue;
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const Geometry* mesh = scene->get(geomID);
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const range<int> tbounds = mesh->timeSegmentRange(set.time_range);
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if (tbounds.size() == 0) continue;
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const size_t t = (tbounds.begin()+tbounds.end())/2;
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const Vec3fa axis1 = mesh->computeDirection(primID,t);
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if (sqr_length(axis1) > 1E-18f) {
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axis0 = normalize(axis1);
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bestGeomPrimID = geomprimID;
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}
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}
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return frame(axis0).transposed();
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}
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struct BinBoundsAndCenter
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{
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__forceinline BinBoundsAndCenter(Scene* scene, BBox1f time_range, const LinearSpace3fa& space)
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: scene(scene), time_range(time_range), space(space) {}
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/*! returns center for binning */
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template<typename PrimRef>
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__forceinline Vec3fa binCenter(const PrimRef& ref) const
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{
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Geometry* mesh = scene->get(ref.geomID());
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LBBox3fa lbounds = mesh->vlinearBounds(space,ref.primID(),time_range);
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return center2(lbounds.interpolate(0.5f));
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}
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/*! returns bounds and centroid used for binning */
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__noinline void binBoundsAndCenter (const PrimRefMB& ref, BBox3fa& bounds_o, Vec3fa& center_o) const // __noinline is workaround for ICC16 bug under MacOSX
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{
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Geometry* mesh = scene->get(ref.geomID());
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LBBox3fa lbounds = mesh->vlinearBounds(space,ref.primID(),time_range);
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bounds_o = lbounds.interpolate(0.5f);
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center_o = center2(bounds_o);
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}
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/*! returns bounds and centroid used for binning */
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__noinline void binBoundsAndCenter (const PrimRefMB& ref, LBBox3fa& bounds_o, Vec3fa& center_o) const // __noinline is workaround for ICC16 bug under MacOSX
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{
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Geometry* mesh = scene->get(ref.geomID());
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LBBox3fa lbounds = mesh->vlinearBounds(space,ref.primID(),time_range);
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bounds_o = lbounds;
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center_o = center2(lbounds.interpolate(0.5f));
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}
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private:
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Scene* scene;
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BBox1f time_range;
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const LinearSpace3fa space;
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};
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/*! finds the best split */
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const Split find(const SetMB& set, const size_t logBlockSize, const LinearSpace3fa& space)
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{
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BinBoundsAndCenter binBoundsAndCenter(scene,set.time_range,space);
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ObjectBinner binner(empty);
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const BinMapping<BINS> mapping(set.size(),set.centBounds);
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bin_parallel(binner,set.prims->data(),set.begin(),set.end(),PARALLEL_FIND_BLOCK_SIZE,PARALLEL_THRESHOLD,mapping,binBoundsAndCenter);
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Split osplit = binner.best(mapping,logBlockSize);
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osplit.sah *= set.time_range.size();
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if (!osplit.valid()) osplit.data = Split::SPLIT_FALLBACK; // use fallback split
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return osplit;
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}
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/*! array partitioning */
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__forceinline void split(const Split& split, const LinearSpace3fa& space, const SetMB& set, SetMB& lset, SetMB& rset)
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{
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BinBoundsAndCenter binBoundsAndCenter(scene,set.time_range,space);
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const size_t begin = set.begin();
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const size_t end = set.end();
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PrimInfoMB left = empty;
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PrimInfoMB right = empty;
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const vint4 vSplitPos(split.pos);
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const vbool4 vSplitMask(1 << split.dim);
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auto isLeft = [&] (const PrimRefMB &ref) { return any(((vint4)split.mapping.bin_unsafe(ref,binBoundsAndCenter) < vSplitPos) & vSplitMask); };
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auto reduction = [] (PrimInfoMB& pinfo, const PrimRefMB& ref) { pinfo.add_primref(ref); };
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auto reduction2 = [] (PrimInfoMB& pinfo0,const PrimInfoMB& pinfo1) { pinfo0.merge(pinfo1); };
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size_t center = parallel_partitioning(set.prims->data(),begin,end,EmptyTy(),left,right,isLeft,reduction,reduction2,PARALLEL_PARTITION_BLOCK_SIZE,PARALLEL_THRESHOLD);
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new (&lset) SetMB(left,set.prims,range<size_t>(begin,center),set.time_range);
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new (&rset) SetMB(right,set.prims,range<size_t>(center,end ),set.time_range);
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}
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private:
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|
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Scene* scene;
|
|
|
|
|
};
|
|
|
|
|
}
|
|
|
|
|
}
|
