initial commit, 4.5 stable

thirdparty/embree/kernels/bvh/bvh_node_obb.h

@@ -0,0 +1,98 @@
+// Copyright 2009-2021 Intel Corporation
+// SPDX-License-Identifier: Apache-2.0
+
+#pragma once
+
+#include "bvh_node_base.h"
+
+namespace embree
+{
+  /*! Node with unaligned bounds */
+  template<typename NodeRef, int N>
+    struct OBBNode_t : public BaseNode_t<NodeRef, N>
+  {
+    using BaseNode_t<NodeRef,N>::children;
+    
+    struct Create
+    {
+      __forceinline NodeRef operator() (const FastAllocator::CachedAllocator& alloc) const
+      {
+        OBBNode_t* node = (OBBNode_t*) alloc.malloc0(sizeof(OBBNode_t),NodeRef::byteNodeAlignment); node->clear();
+        return NodeRef::encodeNode(node);
+      }
+    };
+    
+    struct Set
+    {
+      __forceinline void operator() (NodeRef node, size_t i, NodeRef child, const OBBox3fa& bounds) const {
+        node.ungetAABBNode()->setRef(i,child);
+        node.ungetAABBNode()->setBounds(i,bounds);
+      }
+    };
+    
+    /*! Clears the node. */
+    __forceinline void clear()
+    {
+      naabb.l.vx = Vec3fa(nan);
+      naabb.l.vy = Vec3fa(nan);
+      naabb.l.vz = Vec3fa(nan);
+      naabb.p    = Vec3fa(nan);
+      BaseNode_t<NodeRef,N>::clear();
+    }
+    
+    /*! Sets bounding box. */
+    __forceinline void setBounds(size_t i, const OBBox3fa& b)
+    {
+      assert(i < N);
+      
+      AffineSpace3fa space = b.space;
+      space.p -= b.bounds.lower;
+      space = AffineSpace3fa::scale(1.0f/max(Vec3fa(1E-19f),b.bounds.upper-b.bounds.lower))*space;
+      
+      naabb.l.vx.x[i] = space.l.vx.x;
+      naabb.l.vx.y[i] = space.l.vx.y;
+      naabb.l.vx.z[i] = space.l.vx.z;
+      
+      naabb.l.vy.x[i] = space.l.vy.x;
+      naabb.l.vy.y[i] = space.l.vy.y;
+      naabb.l.vy.z[i] = space.l.vy.z;
+      
+      naabb.l.vz.x[i] = space.l.vz.x;
+      naabb.l.vz.y[i] = space.l.vz.y;
+      naabb.l.vz.z[i] = space.l.vz.z;
+      
+      naabb.p.x[i] = space.p.x;
+      naabb.p.y[i] = space.p.y;
+      naabb.p.z[i] = space.p.z;
+    }
+    
+    /*! Sets ID of child. */
+    __forceinline void setRef(size_t i, const NodeRef& ref) {
+      assert(i < N);
+      children[i] = ref;
+    }
+    
+    /*! Returns the extent of the bounds of the ith child */
+    __forceinline Vec3fa extent(size_t i) const {
+      assert(i<N);
+      const Vec3fa vx(naabb.l.vx.x[i],naabb.l.vx.y[i],naabb.l.vx.z[i]);
+      const Vec3fa vy(naabb.l.vy.x[i],naabb.l.vy.y[i],naabb.l.vy.z[i]);
+      const Vec3fa vz(naabb.l.vz.x[i],naabb.l.vz.y[i],naabb.l.vz.z[i]);
+      return rsqrt(vx*vx + vy*vy + vz*vz);
+    }
+    
+    /*! Returns reference to specified child */
+    __forceinline       NodeRef& child(size_t i)       { assert(i<N); return children[i]; }
+    __forceinline const NodeRef& child(size_t i) const { assert(i<N); return children[i]; }
+    
+    /*! output operator */
+    friend embree_ostream operator<<(embree_ostream o, const OBBNode_t& n)
+    {
+      o << "UnAABBNode { " << n.naabb << " } " << embree_endl;
+      return o;
+    }
+    
+  public:
+    AffineSpace3vf<N> naabb;   //!< non-axis aligned bounding boxes (bounds are [0,1] in specified space)
+  };
+}