531 lines
20 KiB
C++
531 lines
20 KiB
C++
// Copyright 2009-2020 Intel Corporation
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// SPDX-License-Identifier: Apache-2.0
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#include "bvh.h"
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#include "bvh_statistics.h"
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#include "bvh_rotate.h"
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#include "../common/profile.h"
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#include "../../common/algorithms/parallel_prefix_sum.h"
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#include "../builders/primrefgen.h"
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#include "../builders/bvh_builder_morton.h"
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#include "../geometry/triangle.h"
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#include "../geometry/trianglev.h"
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#include "../geometry/trianglei.h"
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#include "../geometry/quadv.h"
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#include "../geometry/quadi.h"
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#include "../geometry/object.h"
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#include "../geometry/instance.h"
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#if defined(__X86_64__) || defined(__aarch64__)
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# define ROTATE_TREE 1 // specifies number of tree rotation rounds to perform
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#else
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# define ROTATE_TREE 0 // do not use tree rotations on 32 bit platforms, barrier bit in NodeRef will cause issues
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#endif
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namespace embree
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{
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namespace isa
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{
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template<int N>
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struct SetBVHNBounds
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{
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typedef BVHN<N> BVH;
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typedef typename BVH::NodeRef NodeRef;
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typedef typename BVH::NodeRecord NodeRecord;
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typedef typename BVH::AABBNode AABBNode;
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BVH* bvh;
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__forceinline SetBVHNBounds (BVH* bvh) : bvh(bvh) {}
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__forceinline NodeRecord operator() (NodeRef ref, const NodeRecord* children, size_t num)
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{
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AABBNode* node = ref.getAABBNode();
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BBox3fa res = empty;
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for (size_t i=0; i<num; i++) {
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const BBox3fa b = children[i].bounds;
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res.extend(b);
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node->setRef(i,children[i].ref);
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node->setBounds(i,b);
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}
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BBox3fx result = (BBox3fx&)res;
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#if ROTATE_TREE
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if (N == 4)
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{
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size_t n = 0;
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for (size_t i=0; i<num; i++)
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n += children[i].bounds.lower.a;
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if (n >= 4096) {
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for (size_t i=0; i<num; i++) {
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if (children[i].bounds.lower.a < 4096) {
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for (int j=0; j<ROTATE_TREE; j++)
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BVHNRotate<N>::rotate(node->child(i));
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node->child(i).setBarrier();
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}
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}
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}
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result.lower.a = unsigned(n);
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}
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#endif
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return NodeRecord(ref,result);
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}
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};
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template<int N, typename Primitive>
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struct CreateMortonLeaf;
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template<int N>
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struct CreateMortonLeaf<N,Triangle4>
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{
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typedef BVHN<N> BVH;
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typedef typename BVH::NodeRef NodeRef;
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typedef typename BVH::NodeRecord NodeRecord;
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__forceinline CreateMortonLeaf (TriangleMesh* mesh, unsigned int geomID, BVHBuilderMorton::BuildPrim* morton)
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: mesh(mesh), morton(morton), geomID_(geomID) {}
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__noinline NodeRecord operator() (const range<unsigned>& current, const FastAllocator::CachedAllocator& alloc)
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{
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vfloat4 lower(pos_inf);
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vfloat4 upper(neg_inf);
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size_t items = current.size();
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size_t start = current.begin();
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assert(items<=4);
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/* allocate leaf node */
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Triangle4* accel = (Triangle4*) alloc.malloc1(sizeof(Triangle4),BVH::byteAlignment);
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NodeRef ref = BVH::encodeLeaf((char*)accel,1);
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vuint4 vgeomID = -1, vprimID = -1;
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Vec3vf4 v0 = zero, v1 = zero, v2 = zero;
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const TriangleMesh* __restrict__ const mesh = this->mesh;
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for (size_t i=0; i<items; i++)
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{
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const unsigned int primID = morton[start+i].index;
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const TriangleMesh::Triangle& tri = mesh->triangle(primID);
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const Vec3fa& p0 = mesh->vertex(tri.v[0]);
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const Vec3fa& p1 = mesh->vertex(tri.v[1]);
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const Vec3fa& p2 = mesh->vertex(tri.v[2]);
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lower = min(lower,(vfloat4)p0,(vfloat4)p1,(vfloat4)p2);
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upper = max(upper,(vfloat4)p0,(vfloat4)p1,(vfloat4)p2);
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vgeomID [i] = geomID_;
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vprimID [i] = primID;
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v0.x[i] = p0.x; v0.y[i] = p0.y; v0.z[i] = p0.z;
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v1.x[i] = p1.x; v1.y[i] = p1.y; v1.z[i] = p1.z;
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v2.x[i] = p2.x; v2.y[i] = p2.y; v2.z[i] = p2.z;
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}
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Triangle4::store_nt(accel,Triangle4(v0,v1,v2,vgeomID,vprimID));
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BBox3fx box_o = BBox3fx((Vec3fx)lower,(Vec3fx)upper);
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#if ROTATE_TREE
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if (N == 4)
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box_o.lower.a = unsigned(current.size());
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#endif
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return NodeRecord(ref,box_o);
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}
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private:
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TriangleMesh* mesh;
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BVHBuilderMorton::BuildPrim* morton;
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unsigned int geomID_ = std::numeric_limits<unsigned int>::max();
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};
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template<int N>
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struct CreateMortonLeaf<N,Triangle4v>
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{
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typedef BVHN<N> BVH;
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typedef typename BVH::NodeRef NodeRef;
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typedef typename BVH::NodeRecord NodeRecord;
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__forceinline CreateMortonLeaf (TriangleMesh* mesh, unsigned int geomID, BVHBuilderMorton::BuildPrim* morton)
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: mesh(mesh), morton(morton), geomID_(geomID) {}
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__noinline NodeRecord operator() (const range<unsigned>& current, const FastAllocator::CachedAllocator& alloc)
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{
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vfloat4 lower(pos_inf);
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vfloat4 upper(neg_inf);
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size_t items = current.size();
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size_t start = current.begin();
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assert(items<=4);
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/* allocate leaf node */
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Triangle4v* accel = (Triangle4v*) alloc.malloc1(sizeof(Triangle4v),BVH::byteAlignment);
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NodeRef ref = BVH::encodeLeaf((char*)accel,1);
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vuint4 vgeomID = -1, vprimID = -1;
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Vec3vf4 v0 = zero, v1 = zero, v2 = zero;
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const TriangleMesh* __restrict__ mesh = this->mesh;
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for (size_t i=0; i<items; i++)
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{
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const unsigned int primID = morton[start+i].index;
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const TriangleMesh::Triangle& tri = mesh->triangle(primID);
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const Vec3fa& p0 = mesh->vertex(tri.v[0]);
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const Vec3fa& p1 = mesh->vertex(tri.v[1]);
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const Vec3fa& p2 = mesh->vertex(tri.v[2]);
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lower = min(lower,(vfloat4)p0,(vfloat4)p1,(vfloat4)p2);
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upper = max(upper,(vfloat4)p0,(vfloat4)p1,(vfloat4)p2);
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vgeomID [i] = geomID_;
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vprimID [i] = primID;
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v0.x[i] = p0.x; v0.y[i] = p0.y; v0.z[i] = p0.z;
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v1.x[i] = p1.x; v1.y[i] = p1.y; v1.z[i] = p1.z;
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v2.x[i] = p2.x; v2.y[i] = p2.y; v2.z[i] = p2.z;
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}
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Triangle4v::store_nt(accel,Triangle4v(v0,v1,v2,vgeomID,vprimID));
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BBox3fx box_o = BBox3fx((Vec3fx)lower,(Vec3fx)upper);
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#if ROTATE_TREE
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if (N == 4)
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box_o.lower.a = current.size();
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#endif
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return NodeRecord(ref,box_o);
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}
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private:
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TriangleMesh* mesh;
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BVHBuilderMorton::BuildPrim* morton;
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unsigned int geomID_ = std::numeric_limits<unsigned int>::max();
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};
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template<int N>
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struct CreateMortonLeaf<N,Triangle4i>
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{
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typedef BVHN<N> BVH;
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typedef typename BVH::NodeRef NodeRef;
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typedef typename BVH::NodeRecord NodeRecord;
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__forceinline CreateMortonLeaf (TriangleMesh* mesh, unsigned int geomID, BVHBuilderMorton::BuildPrim* morton)
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: mesh(mesh), morton(morton), geomID_(geomID) {}
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__noinline NodeRecord operator() (const range<unsigned>& current, const FastAllocator::CachedAllocator& alloc)
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{
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vfloat4 lower(pos_inf);
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vfloat4 upper(neg_inf);
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size_t items = current.size();
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size_t start = current.begin();
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assert(items<=4);
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/* allocate leaf node */
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Triangle4i* accel = (Triangle4i*) alloc.malloc1(sizeof(Triangle4i),BVH::byteAlignment);
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NodeRef ref = BVH::encodeLeaf((char*)accel,1);
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vuint4 v0 = zero, v1 = zero, v2 = zero;
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vuint4 vgeomID = -1, vprimID = -1;
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const TriangleMesh* __restrict__ const mesh = this->mesh;
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for (size_t i=0; i<items; i++)
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{
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const unsigned int primID = morton[start+i].index;
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const TriangleMesh::Triangle& tri = mesh->triangle(primID);
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const Vec3fa& p0 = mesh->vertex(tri.v[0]);
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const Vec3fa& p1 = mesh->vertex(tri.v[1]);
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const Vec3fa& p2 = mesh->vertex(tri.v[2]);
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lower = min(lower,(vfloat4)p0,(vfloat4)p1,(vfloat4)p2);
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upper = max(upper,(vfloat4)p0,(vfloat4)p1,(vfloat4)p2);
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vgeomID[i] = geomID_;
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vprimID[i] = primID;
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unsigned int int_stride = mesh->vertices0.getStride()/4;
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v0[i] = tri.v[0] * int_stride;
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v1[i] = tri.v[1] * int_stride;
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v2[i] = tri.v[2] * int_stride;
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}
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for (size_t i=items; i<4; i++)
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{
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vgeomID[i] = vgeomID[0];
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vprimID[i] = -1;
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v0[i] = 0;
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v1[i] = 0;
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v2[i] = 0;
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}
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Triangle4i::store_nt(accel,Triangle4i(v0,v1,v2,vgeomID,vprimID));
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BBox3fx box_o = BBox3fx((Vec3fx)lower,(Vec3fx)upper);
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#if ROTATE_TREE
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if (N == 4)
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box_o.lower.a = current.size();
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#endif
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return NodeRecord(ref,box_o);
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}
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private:
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TriangleMesh* mesh;
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BVHBuilderMorton::BuildPrim* morton;
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unsigned int geomID_ = std::numeric_limits<unsigned int>::max();
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};
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template<int N>
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struct CreateMortonLeaf<N,Quad4v>
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{
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typedef BVHN<N> BVH;
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typedef typename BVH::NodeRef NodeRef;
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typedef typename BVH::NodeRecord NodeRecord;
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__forceinline CreateMortonLeaf (QuadMesh* mesh, unsigned int geomID, BVHBuilderMorton::BuildPrim* morton)
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: mesh(mesh), morton(morton), geomID_(geomID) {}
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__noinline NodeRecord operator() (const range<unsigned>& current, const FastAllocator::CachedAllocator& alloc)
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{
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vfloat4 lower(pos_inf);
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vfloat4 upper(neg_inf);
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size_t items = current.size();
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size_t start = current.begin();
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assert(items<=4);
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/* allocate leaf node */
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Quad4v* accel = (Quad4v*) alloc.malloc1(sizeof(Quad4v),BVH::byteAlignment);
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NodeRef ref = BVH::encodeLeaf((char*)accel,1);
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vuint4 vgeomID = -1, vprimID = -1;
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Vec3vf4 v0 = zero, v1 = zero, v2 = zero, v3 = zero;
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const QuadMesh* __restrict__ mesh = this->mesh;
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for (size_t i=0; i<items; i++)
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{
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const unsigned int primID = morton[start+i].index;
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const QuadMesh::Quad& tri = mesh->quad(primID);
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const Vec3fa& p0 = mesh->vertex(tri.v[0]);
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const Vec3fa& p1 = mesh->vertex(tri.v[1]);
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const Vec3fa& p2 = mesh->vertex(tri.v[2]);
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const Vec3fa& p3 = mesh->vertex(tri.v[3]);
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lower = min(lower,(vfloat4)p0,(vfloat4)p1,(vfloat4)p2,(vfloat4)p3);
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upper = max(upper,(vfloat4)p0,(vfloat4)p1,(vfloat4)p2,(vfloat4)p3);
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vgeomID [i] = geomID_;
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vprimID [i] = primID;
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v0.x[i] = p0.x; v0.y[i] = p0.y; v0.z[i] = p0.z;
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v1.x[i] = p1.x; v1.y[i] = p1.y; v1.z[i] = p1.z;
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v2.x[i] = p2.x; v2.y[i] = p2.y; v2.z[i] = p2.z;
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v3.x[i] = p3.x; v3.y[i] = p3.y; v3.z[i] = p3.z;
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}
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Quad4v::store_nt(accel,Quad4v(v0,v1,v2,v3,vgeomID,vprimID));
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BBox3fx box_o = BBox3fx((Vec3fx)lower,(Vec3fx)upper);
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#if ROTATE_TREE
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if (N == 4)
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box_o.lower.a = current.size();
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#endif
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return NodeRecord(ref,box_o);
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}
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private:
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QuadMesh* mesh;
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BVHBuilderMorton::BuildPrim* morton;
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unsigned int geomID_ = std::numeric_limits<unsigned int>::max();
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};
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template<int N>
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struct CreateMortonLeaf<N,Object>
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{
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typedef BVHN<N> BVH;
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typedef typename BVH::NodeRef NodeRef;
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typedef typename BVH::NodeRecord NodeRecord;
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__forceinline CreateMortonLeaf (UserGeometry* mesh, unsigned int geomID, BVHBuilderMorton::BuildPrim* morton)
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: mesh(mesh), morton(morton), geomID_(geomID) {}
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__noinline NodeRecord operator() (const range<unsigned>& current, const FastAllocator::CachedAllocator& alloc)
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{
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vfloat4 lower(pos_inf);
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vfloat4 upper(neg_inf);
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size_t items = current.size();
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size_t start = current.begin();
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/* allocate leaf node */
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Object* accel = (Object*) alloc.malloc1(items*sizeof(Object),BVH::byteAlignment);
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NodeRef ref = BVH::encodeLeaf((char*)accel,items);
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const UserGeometry* mesh = this->mesh;
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BBox3fa bounds = empty;
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for (size_t i=0; i<items; i++)
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{
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const unsigned int index = morton[start+i].index;
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const unsigned int primID = index;
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bounds.extend(mesh->bounds(primID));
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new (&accel[i]) Object(geomID_,primID);
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}
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BBox3fx box_o = (BBox3fx&)bounds;
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#if ROTATE_TREE
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if (N == 4)
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box_o.lower.a = current.size();
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#endif
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return NodeRecord(ref,box_o);
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}
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private:
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UserGeometry* mesh;
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BVHBuilderMorton::BuildPrim* morton;
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unsigned int geomID_ = std::numeric_limits<unsigned int>::max();
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};
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template<int N>
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struct CreateMortonLeaf<N,InstancePrimitive>
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{
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typedef BVHN<N> BVH;
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typedef typename BVH::NodeRef NodeRef;
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typedef typename BVH::NodeRecord NodeRecord;
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__forceinline CreateMortonLeaf (Instance* mesh, unsigned int geomID, BVHBuilderMorton::BuildPrim* morton)
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: mesh(mesh), morton(morton), geomID_(geomID) {}
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__noinline NodeRecord operator() (const range<unsigned>& current, const FastAllocator::CachedAllocator& alloc)
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{
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vfloat4 lower(pos_inf);
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vfloat4 upper(neg_inf);
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size_t items = current.size();
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size_t start = current.begin();
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assert(items <= 1);
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/* allocate leaf node */
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InstancePrimitive* accel = (InstancePrimitive*) alloc.malloc1(items*sizeof(InstancePrimitive),BVH::byteAlignment);
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NodeRef ref = BVH::encodeLeaf((char*)accel,items);
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const Instance* instance = this->mesh;
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BBox3fa bounds = empty;
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for (size_t i=0; i<items; i++)
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{
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const unsigned int primID = morton[start+i].index;
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bounds.extend(instance->bounds(primID));
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new (&accel[i]) InstancePrimitive(instance, geomID_);
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}
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BBox3fx box_o = (BBox3fx&)bounds;
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#if ROTATE_TREE
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if (N == 4)
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box_o.lower.a = current.size();
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#endif
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return NodeRecord(ref,box_o);
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}
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private:
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Instance* mesh;
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BVHBuilderMorton::BuildPrim* morton;
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unsigned int geomID_ = std::numeric_limits<unsigned int>::max();
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};
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template<typename Mesh>
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struct CalculateMeshBounds
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{
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__forceinline CalculateMeshBounds (Mesh* mesh)
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: mesh(mesh) {}
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__forceinline const BBox3fa operator() (const BVHBuilderMorton::BuildPrim& morton) {
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return mesh->bounds(morton.index);
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}
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private:
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Mesh* mesh;
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};
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template<int N, typename Mesh, typename Primitive>
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class BVHNMeshBuilderMorton : public Builder
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{
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typedef BVHN<N> BVH;
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typedef typename BVH::AABBNode AABBNode;
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typedef typename BVH::NodeRef NodeRef;
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typedef typename BVH::NodeRecord NodeRecord;
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public:
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BVHNMeshBuilderMorton (BVH* bvh, Mesh* mesh, unsigned int geomID, const size_t minLeafSize, const size_t maxLeafSize, const size_t singleThreadThreshold = DEFAULT_SINGLE_THREAD_THRESHOLD)
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: bvh(bvh), mesh(mesh), morton(bvh->device,0), settings(N,BVH::maxBuildDepth,minLeafSize,min(maxLeafSize,Primitive::max_size()*BVH::maxLeafBlocks),singleThreadThreshold), geomID_(geomID) {}
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/* build function */
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void build()
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{
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/* we reset the allocator when the mesh size changed */
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if (mesh->numPrimitives != numPreviousPrimitives) {
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bvh->alloc.clear();
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morton.clear();
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}
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size_t numPrimitives = mesh->size();
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numPreviousPrimitives = numPrimitives;
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/* skip build for empty scene */
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if (numPrimitives == 0) {
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bvh->set(BVH::emptyNode,empty,0);
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return;
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}
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/* preallocate arrays */
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morton.resize(numPrimitives);
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|
size_t bytesEstimated = numPrimitives*sizeof(AABBNode)/(4*N) + size_t(1.2f*Primitive::blocks(numPrimitives)*sizeof(Primitive));
|
|
size_t bytesMortonCodes = numPrimitives*sizeof(BVHBuilderMorton::BuildPrim);
|
|
bytesEstimated = max(bytesEstimated,bytesMortonCodes); // the first allocation block is reused to sort the morton codes
|
|
bvh->alloc.init(bytesMortonCodes,bytesMortonCodes,bytesEstimated);
|
|
|
|
/* create morton code array */
|
|
BVHBuilderMorton::BuildPrim* dest = (BVHBuilderMorton::BuildPrim*) bvh->alloc.specialAlloc(bytesMortonCodes);
|
|
size_t numPrimitivesGen = createMortonCodeArray<Mesh>(mesh,morton,bvh->scene->progressInterface);
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|
|
|
/* create BVH */
|
|
SetBVHNBounds<N> setBounds(bvh);
|
|
CreateMortonLeaf<N,Primitive> createLeaf(mesh,geomID_,morton.data());
|
|
CalculateMeshBounds<Mesh> calculateBounds(mesh);
|
|
auto root = BVHBuilderMorton::build<NodeRecord>(
|
|
typename BVH::CreateAlloc(bvh),
|
|
typename BVH::AABBNode::Create(),
|
|
setBounds,createLeaf,calculateBounds,bvh->scene->progressInterface,
|
|
morton.data(),dest,numPrimitivesGen,settings);
|
|
|
|
bvh->set(root.ref,LBBox3fa(root.bounds),numPrimitives);
|
|
|
|
#if ROTATE_TREE
|
|
if (N == 4)
|
|
{
|
|
for (int i=0; i<ROTATE_TREE; i++)
|
|
BVHNRotate<N>::rotate(bvh->root);
|
|
bvh->clearBarrier(bvh->root);
|
|
}
|
|
#endif
|
|
|
|
/* clear temporary data for static geometry */
|
|
if (bvh->scene->isStaticAccel()) {
|
|
morton.clear();
|
|
}
|
|
bvh->cleanup();
|
|
}
|
|
|
|
void clear() {
|
|
morton.clear();
|
|
}
|
|
|
|
private:
|
|
BVH* bvh;
|
|
Mesh* mesh;
|
|
mvector<BVHBuilderMorton::BuildPrim> morton;
|
|
BVHBuilderMorton::Settings settings;
|
|
unsigned int geomID_ = std::numeric_limits<unsigned int>::max();
|
|
unsigned int numPreviousPrimitives = 0;
|
|
};
|
|
|
|
#if defined(EMBREE_GEOMETRY_TRIANGLE)
|
|
Builder* BVH4Triangle4MeshBuilderMortonGeneral (void* bvh, TriangleMesh* mesh, unsigned int geomID, size_t mode) { return new class BVHNMeshBuilderMorton<4,TriangleMesh,Triangle4> ((BVH4*)bvh,mesh,geomID,4,4); }
|
|
Builder* BVH4Triangle4vMeshBuilderMortonGeneral (void* bvh, TriangleMesh* mesh, unsigned int geomID, size_t mode) { return new class BVHNMeshBuilderMorton<4,TriangleMesh,Triangle4v>((BVH4*)bvh,mesh,geomID,4,4); }
|
|
Builder* BVH4Triangle4iMeshBuilderMortonGeneral (void* bvh, TriangleMesh* mesh, unsigned int geomID, size_t mode) { return new class BVHNMeshBuilderMorton<4,TriangleMesh,Triangle4i>((BVH4*)bvh,mesh,geomID,4,4); }
|
|
#if defined(__AVX__)
|
|
Builder* BVH8Triangle4MeshBuilderMortonGeneral (void* bvh, TriangleMesh* mesh, unsigned int geomID, size_t mode) { return new class BVHNMeshBuilderMorton<8,TriangleMesh,Triangle4> ((BVH8*)bvh,mesh,geomID,4,4); }
|
|
Builder* BVH8Triangle4vMeshBuilderMortonGeneral (void* bvh, TriangleMesh* mesh, unsigned int geomID, size_t mode) { return new class BVHNMeshBuilderMorton<8,TriangleMesh,Triangle4v>((BVH8*)bvh,mesh,geomID,4,4); }
|
|
Builder* BVH8Triangle4iMeshBuilderMortonGeneral (void* bvh, TriangleMesh* mesh, unsigned int geomID, size_t mode) { return new class BVHNMeshBuilderMorton<8,TriangleMesh,Triangle4i>((BVH8*)bvh,mesh,geomID,4,4); }
|
|
#endif
|
|
#endif
|
|
|
|
#if defined(EMBREE_GEOMETRY_QUAD)
|
|
Builder* BVH4Quad4vMeshBuilderMortonGeneral (void* bvh, QuadMesh* mesh, unsigned int geomID, size_t mode) { return new class BVHNMeshBuilderMorton<4,QuadMesh,Quad4v>((BVH4*)bvh,mesh,geomID,4,4); }
|
|
#if defined(__AVX__)
|
|
Builder* BVH8Quad4vMeshBuilderMortonGeneral (void* bvh, QuadMesh* mesh, unsigned int geomID, size_t mode) { return new class BVHNMeshBuilderMorton<8,QuadMesh,Quad4v>((BVH8*)bvh,mesh,geomID,4,4); }
|
|
#endif
|
|
#endif
|
|
|
|
#if defined(EMBREE_GEOMETRY_USER)
|
|
Builder* BVH4VirtualMeshBuilderMortonGeneral (void* bvh, UserGeometry* mesh, unsigned int geomID, size_t mode) { return new class BVHNMeshBuilderMorton<4,UserGeometry,Object>((BVH4*)bvh,mesh,geomID,1,BVH4::maxLeafBlocks); }
|
|
#if defined(__AVX__)
|
|
Builder* BVH8VirtualMeshBuilderMortonGeneral (void* bvh, UserGeometry* mesh, unsigned int geomID, size_t mode) { return new class BVHNMeshBuilderMorton<8,UserGeometry,Object>((BVH8*)bvh,mesh,geomID,1,BVH4::maxLeafBlocks); }
|
|
#endif
|
|
#endif
|
|
|
|
#if defined(EMBREE_GEOMETRY_INSTANCE)
|
|
Builder* BVH4InstanceMeshBuilderMortonGeneral (void* bvh, Instance* mesh, Geometry::GTypeMask gtype, unsigned int geomID, size_t mode) { return new class BVHNMeshBuilderMorton<4,Instance,InstancePrimitive>((BVH4*)bvh,mesh,gtype,geomID,1,BVH4::maxLeafBlocks); }
|
|
#if defined(__AVX__)
|
|
Builder* BVH8InstanceMeshBuilderMortonGeneral (void* bvh, Instance* mesh, Geometry::GTypeMask gtype, unsigned int geomID, size_t mode) { return new class BVHNMeshBuilderMorton<8,Instance,InstancePrimitive>((BVH8*)bvh,mesh,gtype,geomID,1,BVH4::maxLeafBlocks); }
|
|
#endif
|
|
#endif
|
|
|
|
}
|
|
}
|