99 lines
2.9 KiB
C++
99 lines
2.9 KiB
C++
// Copyright 2009-2021 Intel Corporation
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// SPDX-License-Identifier: Apache-2.0
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#pragma once
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#include "bvh_node_base.h"
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namespace embree
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{
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/*! Node with unaligned bounds */
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template<typename NodeRef, int N>
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struct OBBNode_t : public BaseNode_t<NodeRef, N>
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{
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using BaseNode_t<NodeRef,N>::children;
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struct Create
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{
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__forceinline NodeRef operator() (const FastAllocator::CachedAllocator& alloc) const
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{
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OBBNode_t* node = (OBBNode_t*) alloc.malloc0(sizeof(OBBNode_t),NodeRef::byteNodeAlignment); node->clear();
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return NodeRef::encodeNode(node);
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}
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};
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struct Set
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{
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__forceinline void operator() (NodeRef node, size_t i, NodeRef child, const OBBox3fa& bounds) const {
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node.ungetAABBNode()->setRef(i,child);
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node.ungetAABBNode()->setBounds(i,bounds);
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}
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};
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/*! Clears the node. */
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__forceinline void clear()
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{
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naabb.l.vx = Vec3fa(nan);
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naabb.l.vy = Vec3fa(nan);
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naabb.l.vz = Vec3fa(nan);
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naabb.p = Vec3fa(nan);
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BaseNode_t<NodeRef,N>::clear();
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}
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/*! Sets bounding box. */
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__forceinline void setBounds(size_t i, const OBBox3fa& b)
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{
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assert(i < N);
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AffineSpace3fa space = b.space;
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space.p -= b.bounds.lower;
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space = AffineSpace3fa::scale(1.0f/max(Vec3fa(1E-19f),b.bounds.upper-b.bounds.lower))*space;
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naabb.l.vx.x[i] = space.l.vx.x;
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naabb.l.vx.y[i] = space.l.vx.y;
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naabb.l.vx.z[i] = space.l.vx.z;
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naabb.l.vy.x[i] = space.l.vy.x;
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naabb.l.vy.y[i] = space.l.vy.y;
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naabb.l.vy.z[i] = space.l.vy.z;
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naabb.l.vz.x[i] = space.l.vz.x;
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naabb.l.vz.y[i] = space.l.vz.y;
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naabb.l.vz.z[i] = space.l.vz.z;
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naabb.p.x[i] = space.p.x;
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naabb.p.y[i] = space.p.y;
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naabb.p.z[i] = space.p.z;
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}
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/*! Sets ID of child. */
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__forceinline void setRef(size_t i, const NodeRef& ref) {
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assert(i < N);
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children[i] = ref;
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}
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/*! Returns the extent of the bounds of the ith child */
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__forceinline Vec3fa extent(size_t i) const {
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assert(i<N);
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const Vec3fa vx(naabb.l.vx.x[i],naabb.l.vx.y[i],naabb.l.vx.z[i]);
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const Vec3fa vy(naabb.l.vy.x[i],naabb.l.vy.y[i],naabb.l.vy.z[i]);
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const Vec3fa vz(naabb.l.vz.x[i],naabb.l.vz.y[i],naabb.l.vz.z[i]);
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return rsqrt(vx*vx + vy*vy + vz*vz);
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}
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/*! Returns reference to specified child */
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__forceinline NodeRef& child(size_t i) { assert(i<N); return children[i]; }
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__forceinline const NodeRef& child(size_t i) const { assert(i<N); return children[i]; }
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/*! output operator */
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friend embree_ostream operator<<(embree_ostream o, const OBBNode_t& n)
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{
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o << "UnAABBNode { " << n.naabb << " } " << embree_endl;
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return o;
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}
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public:
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AffineSpace3vf<N> naabb; //!< non-axis aligned bounding boxes (bounds are [0,1] in specified space)
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};
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}
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