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// Copyright 2009-2021 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
#include "primrefgen.h"
#include "primrefgen_presplit.h"
#include "../../common/algorithms/parallel_for_for.h"
#include "../../common/algorithms/parallel_for_for_prefix_sum.h"
namespace embree
{
namespace isa
{
PrimInfo createPrimRefArray(Geometry* geometry, unsigned int geomID, const size_t numPrimRefs, mvector<PrimRef>& prims, BuildProgressMonitor& progressMonitor)
{
ParallelPrefixSumState<PrimInfo> pstate;
/* first try */
progressMonitor(0);
PrimInfo pinfo = parallel_prefix_sum( pstate, size_t(0), geometry->size(), size_t(1024), PrimInfo(empty), [&](const range<size_t>& r, const PrimInfo& base) -> PrimInfo {
return geometry->createPrimRefArray(prims,r,r.begin(),geomID);
}, [](const PrimInfo& a, const PrimInfo& b) -> PrimInfo { return PrimInfo::merge(a,b); });
/* if we need to filter out geometry, run again */
if (pinfo.size() != numPrimRefs)
{
progressMonitor(0);
pinfo = parallel_prefix_sum( pstate, size_t(0), geometry->size(), size_t(1024), PrimInfo(empty), [&](const range<size_t>& r, const PrimInfo& base) -> PrimInfo {
return geometry->createPrimRefArray(prims,r,base.size(),geomID);
}, [](const PrimInfo& a, const PrimInfo& b) -> PrimInfo { return PrimInfo::merge(a,b); });
}
return pinfo;
}
PrimInfo createPrimRefArray(Scene* scene, Geometry::GTypeMask types, bool mblur, const size_t numPrimRefs, mvector<PrimRef>& prims, BuildProgressMonitor& progressMonitor)
{
ParallelForForPrefixSumState<PrimInfo> pstate;
Scene::Iterator2 iter(scene,types,mblur);
/* first try */
progressMonitor(0);
pstate.init(iter,size_t(1024));
PrimInfo pinfo = parallel_for_for_prefix_sum0( pstate, iter, PrimInfo(empty), [&](Geometry* mesh, const range<size_t>& r, size_t k, size_t geomID) -> PrimInfo {
return mesh->createPrimRefArray(prims,r,k,(unsigned)geomID);
}, [](const PrimInfo& a, const PrimInfo& b) -> PrimInfo { return PrimInfo::merge(a,b); });
/* if we need to filter out geometry, run again */
if (pinfo.size() != numPrimRefs)
{
progressMonitor(0);
pinfo = parallel_for_for_prefix_sum1( pstate, iter, PrimInfo(empty), [&](Geometry* mesh, const range<size_t>& r, size_t k, size_t geomID, const PrimInfo& base) -> PrimInfo {
return mesh->createPrimRefArray(prims,r,base.size(),(unsigned)geomID);
}, [](const PrimInfo& a, const PrimInfo& b) -> PrimInfo { return PrimInfo::merge(a,b); });
}
return pinfo;
}
PrimInfo createPrimRefArrayMBlur(Scene* scene, Geometry::GTypeMask types, const size_t numPrimRefs, mvector<PrimRef>& prims, BuildProgressMonitor& progressMonitor, size_t itime)
{
ParallelForForPrefixSumState<PrimInfo> pstate;
Scene::Iterator2 iter(scene,types,true);
/* first try */
progressMonitor(0);
pstate.init(iter,size_t(1024));
PrimInfo pinfo = parallel_for_for_prefix_sum0( pstate, iter, PrimInfo(empty), [&](Geometry* mesh, const range<size_t>& r, size_t k, size_t geomID) -> PrimInfo {
return mesh->createPrimRefArrayMB(prims,itime,r,k,(unsigned)geomID);
}, [](const PrimInfo& a, const PrimInfo& b) -> PrimInfo { return PrimInfo::merge(a,b); });
/* if we need to filter out geometry, run again */
if (pinfo.size() != numPrimRefs)
{
progressMonitor(0);
pinfo = parallel_for_for_prefix_sum1( pstate, iter, PrimInfo(empty), [&](Geometry* mesh, const range<size_t>& r, size_t k, size_t geomID, const PrimInfo& base) -> PrimInfo {
return mesh->createPrimRefArrayMB(prims,itime,r,base.size(),(unsigned)geomID);
}, [](const PrimInfo& a, const PrimInfo& b) -> PrimInfo { return PrimInfo::merge(a,b); });
}
return pinfo;
}
PrimInfoMB createPrimRefArrayMSMBlur(Scene* scene, Geometry::GTypeMask types, const size_t numPrimRefs, mvector<PrimRefMB>& prims, BuildProgressMonitor& progressMonitor, BBox1f t0t1)
{
ParallelForForPrefixSumState<PrimInfoMB> pstate;
Scene::Iterator2 iter(scene,types,true);
/* first try */
progressMonitor(0);
pstate.init(iter,size_t(1024));
PrimInfoMB pinfo = parallel_for_for_prefix_sum0( pstate, iter, PrimInfoMB(empty), [&](Geometry* mesh, const range<size_t>& r, size_t k, size_t geomID) -> PrimInfoMB {
return mesh->createPrimRefMBArray(prims,t0t1,r,k,(unsigned)geomID);
}, [](const PrimInfoMB& a, const PrimInfoMB& b) -> PrimInfoMB { return PrimInfoMB::merge2(a,b); });
/* if we need to filter out geometry, run again */
if (pinfo.size() != numPrimRefs)
{
progressMonitor(0);
pinfo = parallel_for_for_prefix_sum1( pstate, iter, PrimInfoMB(empty), [&](Geometry* mesh, const range<size_t>& r, size_t k, size_t geomID, const PrimInfoMB& base) -> PrimInfoMB {
return mesh->createPrimRefMBArray(prims,t0t1,r,base.size(),(unsigned)geomID);
}, [](const PrimInfoMB& a, const PrimInfoMB& b) -> PrimInfoMB { return PrimInfoMB::merge2(a,b); });
}
/* the BVH starts with that time range, even though primitives might have smaller/larger time range */
pinfo.time_range = t0t1;
return pinfo;
}
template<typename Mesh>
size_t createMortonCodeArray(Mesh* mesh, mvector<BVHBuilderMorton::BuildPrim>& morton, BuildProgressMonitor& progressMonitor)
{
size_t numPrimitives = morton.size();
/* compute scene bounds */
std::pair<size_t,BBox3fa> cb_empty(0,empty);
auto cb = parallel_reduce
( size_t(0), numPrimitives, size_t(1024), cb_empty, [&](const range<size_t>& r) -> std::pair<size_t,BBox3fa>
{
size_t num = 0;
BBox3fa bounds = empty;
for (size_t j=r.begin(); j<r.end(); j++)
{
BBox3fa prim_bounds = empty;
if (unlikely(!mesh->buildBounds(j,&prim_bounds))) continue;
bounds.extend(center2(prim_bounds));
num++;
}
return std::make_pair(num,bounds);
}, [] (const std::pair<size_t,BBox3fa>& a, const std::pair<size_t,BBox3fa>& b) {
return std::make_pair(a.first + b.first,merge(a.second,b.second));
});
size_t numPrimitivesGen = cb.first;
const BBox3fa centBounds = cb.second;
/* compute morton codes */
if (likely(numPrimitivesGen == numPrimitives))
{
/* fast path if all primitives were valid */
BVHBuilderMorton::MortonCodeMapping mapping(centBounds);
parallel_for( size_t(0), numPrimitives, size_t(1024), [&](const range<size_t>& r) -> void {
BVHBuilderMorton::MortonCodeGenerator generator(mapping,&morton.data()[r.begin()]);
for (size_t j=r.begin(); j<r.end(); j++)
generator(mesh->bounds(j),unsigned(j));
});
}
else
{
/* slow path, fallback in case some primitives were invalid */
ParallelPrefixSumState<size_t> pstate;
BVHBuilderMorton::MortonCodeMapping mapping(centBounds);
parallel_prefix_sum( pstate, size_t(0), numPrimitives, size_t(1024), size_t(0), [&](const range<size_t>& r, const size_t base) -> size_t {
size_t num = 0;
BVHBuilderMorton::MortonCodeGenerator generator(mapping,&morton.data()[r.begin()]);
for (size_t j=r.begin(); j<r.end(); j++)
{
BBox3fa bounds = empty;
if (unlikely(!mesh->buildBounds(j,&bounds))) continue;
generator(bounds,unsigned(j));
num++;
}
return num;
}, std::plus<size_t>());
parallel_prefix_sum( pstate, size_t(0), numPrimitives, size_t(1024), size_t(0), [&](const range<size_t>& r, const size_t base) -> size_t {
size_t num = 0;
BVHBuilderMorton::MortonCodeGenerator generator(mapping,&morton.data()[base]);
for (size_t j=r.begin(); j<r.end(); j++)
{
BBox3fa bounds = empty;
if (!mesh->buildBounds(j,&bounds)) continue;
generator(bounds,unsigned(j));
num++;
}
return num;
}, std::plus<size_t>());
}
return numPrimitivesGen;
}
// ====================================================================================================
// ====================================================================================================
// ====================================================================================================
// special variants for grid meshes
#if defined(EMBREE_GEOMETRY_GRID)
PrimInfo createPrimRefArrayGrids(Scene* scene, mvector<PrimRef>& prims, mvector<SubGridBuildData>& sgrids)
{
PrimInfo pinfo(empty);
size_t numPrimitives = 0;
/* first run to get #primitives */
ParallelForForPrefixSumState<PrimInfo> pstate;
Scene::Iterator<GridMesh,false> iter(scene);
pstate.init(iter,size_t(1024));
/* iterate over all meshes in the scene */
pinfo = parallel_for_for_prefix_sum0( pstate, iter, PrimInfo(empty), [&](GridMesh* mesh, const range<size_t>& r, size_t k, size_t geomID) -> PrimInfo {
PrimInfo pinfo(empty);
for (size_t j=r.begin(); j<r.end(); j++)
{
if (!mesh->valid(j)) continue;
BBox3fa bounds = empty;
const PrimRef prim(bounds,(unsigned)geomID,(unsigned)j);
if (!mesh->valid(j)) continue;
pinfo.add_center2(prim,mesh->getNumSubGrids(j));
}
return pinfo;
}, [](const PrimInfo& a, const PrimInfo& b) -> PrimInfo { return PrimInfo::merge(a,b); });
numPrimitives = pinfo.size();
/* resize arrays */
sgrids.resize(numPrimitives);
prims.resize(numPrimitives);
/* second run to fill primrefs and SubGridBuildData arrays */
pinfo = parallel_for_for_prefix_sum1( pstate, iter, PrimInfo(empty), [&](GridMesh* mesh, const range<size_t>& r, size_t k, size_t geomID, const PrimInfo& base) -> PrimInfo {
k = base.size();
size_t p_index = k;
PrimInfo pinfo(empty);
for (size_t j=r.begin(); j<r.end(); j++)
{
if (!mesh->valid(j)) continue;
const GridMesh::Grid &g = mesh->grid(j);
for (unsigned int y=0; y<g.resY-1u; y+=2)
for (unsigned int x=0; x<g.resX-1u; x+=2)
{
BBox3fa bounds = empty;
if (!mesh->buildBounds(g,x,y,bounds)) continue; // get bounds of subgrid
const PrimRef prim(bounds,(unsigned)geomID,(unsigned)p_index);
pinfo.add_center2(prim);
sgrids[p_index] = SubGridBuildData(x | g.get3x3FlagsX(x), y | g.get3x3FlagsY(y), unsigned(j));
prims[p_index++] = prim;
}
}
return pinfo;
}, [](const PrimInfo& a, const PrimInfo& b) -> PrimInfo { return PrimInfo::merge(a,b); });
assert(pinfo.size() == numPrimitives);
return pinfo;
}
PrimInfo createPrimRefArrayGrids(GridMesh* mesh, mvector<PrimRef>& prims, mvector<SubGridBuildData>& sgrids)
{
unsigned int geomID_ = std::numeric_limits<unsigned int>::max ();
PrimInfo pinfo(empty);
size_t numPrimitives = 0;
ParallelPrefixSumState<PrimInfo> pstate;
/* iterate over all grids in a single mesh */
pinfo = parallel_prefix_sum( pstate, size_t(0), mesh->size(), size_t(1024), PrimInfo(empty), [&](const range<size_t>& r, const PrimInfo& base) -> PrimInfo
{
PrimInfo pinfo(empty);
for (size_t j=r.begin(); j<r.end(); j++)
{
if (!mesh->valid(j)) continue;
BBox3fa bounds = empty;
const PrimRef prim(bounds,geomID_,unsigned(j));
pinfo.add_center2(prim,mesh->getNumSubGrids(j));
}
return pinfo;
}, [](const PrimInfo& a, const PrimInfo& b) -> PrimInfo { return PrimInfo::merge(a,b); });
numPrimitives = pinfo.size();
/* resize arrays */
sgrids.resize(numPrimitives);
prims.resize(numPrimitives);
/* second run to fill primrefs and SubGridBuildData arrays */
pinfo = parallel_prefix_sum( pstate, size_t(0), mesh->size(), size_t(1024), PrimInfo(empty), [&](const range<size_t>& r, const PrimInfo& base) -> PrimInfo
{
size_t p_index = base.size();
PrimInfo pinfo(empty);
for (size_t j=r.begin(); j<r.end(); j++)
{
if (!mesh->valid(j)) continue;
const GridMesh::Grid &g = mesh->grid(j);
for (unsigned int y=0; y<g.resY-1u; y+=2)
for (unsigned int x=0; x<g.resX-1u; x+=2)
{
BBox3fa bounds = empty;
if (!mesh->buildBounds(g,x,y,bounds)) continue; // get bounds of subgrid
const PrimRef prim(bounds,geomID_,unsigned(p_index));
pinfo.add_center2(prim);
sgrids[p_index] = SubGridBuildData(x | g.get3x3FlagsX(x), y | g.get3x3FlagsY(y), unsigned(j));
prims[p_index++] = prim;
}
}
return pinfo;
}, [](const PrimInfo& a, const PrimInfo& b) -> PrimInfo { return PrimInfo::merge(a,b); });
return pinfo;
}
#endif
// ====================================================================================================
// ====================================================================================================
// ====================================================================================================
IF_ENABLED_TRIS (template size_t createMortonCodeArray<TriangleMesh>(TriangleMesh* mesh COMMA mvector<BVHBuilderMorton::BuildPrim>& morton COMMA BuildProgressMonitor& progressMonitor));
IF_ENABLED_QUADS(template size_t createMortonCodeArray<QuadMesh>(QuadMesh* mesh COMMA mvector<BVHBuilderMorton::BuildPrim>& morton COMMA BuildProgressMonitor& progressMonitor));
IF_ENABLED_USER (template size_t createMortonCodeArray<UserGeometry>(UserGeometry* mesh COMMA mvector<BVHBuilderMorton::BuildPrim>& morton COMMA BuildProgressMonitor& progressMonitor));
IF_ENABLED_INSTANCE (template size_t createMortonCodeArray<Instance>(Instance* mesh COMMA mvector<BVHBuilderMorton::BuildPrim>& morton COMMA BuildProgressMonitor& progressMonitor));
}
}
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