void build(size_t, size_t)
{
/* progress monitor */
auto progress = [&] (size_t dn) { bvh->scene->progressMonitor(dn); };
auto virtualprogress = BuildProgressMonitorFromClosure(progress);
/* fast path for empty BVH */
const size_t numPrimitives = scene->getNumPrimitives<BezierCurves,2>();
if (numPrimitives == 0) {
prims.clear();
bvh->set(BVH::emptyNode,empty,0);
return;
}
double t0 = bvh->preBuild(TOSTRING(isa) "::BVH" + toString(N) + "BuilderMBHairSAH");
//profile(1,5,numPrimitives,[&] (ProfileTimer& timer) {
/* create primref array */
bvh->alloc.init_estimate(numPrimitives*sizeof(Primitive));
prims.resize(numPrimitives);
const PrimInfo pinfo = createBezierRefArray<2>(scene,prims,virtualprogress);
NodeRef root = bvh_obb_builder_binned_sah<N>
(
[&] () { return bvh->alloc.threadLocal2(); },
[&] (const PrimInfo* children, const size_t numChildren, HeuristicArrayBinningSAH<BezierPrim> alignedHeuristic, FastAllocator::ThreadLocal2* alloc) -> NodeMB*
{
NodeMB* node = (NodeMB*) alloc->alloc0.malloc(sizeof(NodeMB),16); node->clear();
for (size_t i=0; i<numChildren; i++)
{
std::pair<BBox3fa,BBox3fa> bounds = alignedHeuristic.computePrimInfoMB(scene,children[i]);
node->set(i,bounds.first,bounds.second);
}
return node;
},
[&] (const PrimInfo* children, const size_t numChildren, UnalignedHeuristicArrayBinningSAH<BezierPrim> unalignedHeuristic, FastAllocator::ThreadLocal2* alloc) -> UnalignedNodeMB*
{
UnalignedNodeMB* node = (UnalignedNodeMB*) alloc->alloc0.malloc(sizeof(UnalignedNodeMB),16); node->clear();
for (size_t i=0; i<numChildren; i++)
{
const AffineSpace3fa space = unalignedHeuristic.computeAlignedSpaceMB(scene,children[i]);
UnalignedHeuristicArrayBinningSAH<BezierPrim>::PrimInfoMB pinfo = unalignedHeuristic.computePrimInfoMB(scene,children[i],space);
node->set(i,space,pinfo.s0t0,pinfo.s1t1);
}
return node;
},
[&] (size_t depth, const PrimInfo& pinfo, FastAllocator::ThreadLocal2* alloc) -> NodeRef
{
size_t items = pinfo.size();
size_t start = pinfo.begin;
Primitive* accel = (Primitive*) alloc->alloc1.malloc(items*sizeof(Primitive));
NodeRef node = bvh->encodeLeaf((char*)accel,items);
for (size_t i=0; i<items; i++) {
accel[i].fill(prims.data(),start,pinfo.end,bvh->scene,false);
}
return node;
},
progress,
prims.data(),pinfo,N,BVH::maxBuildDepthLeaf,1,1,BVH::maxLeafBlocks);
bvh->set(root,pinfo.geomBounds,pinfo.size());
//});
/* clear temporary data for static geometry */
if (scene->isStatic()) {
prims.clear();
bvh->shrink();
}
bvh->cleanup();
bvh->postBuild(t0);
}
