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/**
* @file llvolumeoctree.h
* @brief LLVolume octree classes.
*
* $LicenseInfo:firstyear=2002&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2010, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#ifndef LL_LLVOLUME_OCTREE_H
#define LL_LLVOLUME_OCTREE_H
#include "linden_common.h"
#include "llmemory.h"
#include "lloctree.h"
#include "llvolume.h"
#include "llvector4a.h"
class alignas(16) LLVolumeTriangle : public LLRefCount
{
LL_ALIGN_NEW
public:
LLVolumeTriangle()
{
mBinIndex = -1;
}
LLVolumeTriangle(const LLVolumeTriangle& rhs)
{
*this = rhs;
}
~LLVolumeTriangle()
{
}
LL_ALIGN_16(LLVector4a mPositionGroup);
const LLVector4a* mV[3];
U32 mIndex[3];
F32 mRadius;
mutable S32 mBinIndex;
virtual const LLVector4a& getPositionGroup() const;
virtual const F32& getBinRadius() const;
S32 getBinIndex() const { return mBinIndex; }
void setBinIndex(S32 idx) const { mBinIndex = idx; }
};
class alignas(16) LLVolumeOctreeListener : public LLOctreeListener<LLVolumeTriangle, LLVolumeTriangle*>
{
LL_ALIGN_NEW
public:
LLVolumeOctreeListener(LLOctreeNode<LLVolumeTriangle, LLVolumeTriangle*>* node);
~LLVolumeOctreeListener();
LLVolumeOctreeListener(const LLVolumeOctreeListener& rhs)
{
*this = rhs;
}
const LLVolumeOctreeListener& operator=(const LLVolumeOctreeListener& rhs)
{
LL_ERRS() << "Illegal operation!" << LL_ENDL;
return *this;
}
//LISTENER FUNCTIONS
virtual void handleChildAddition(const LLOctreeNode<LLVolumeTriangle, LLVolumeTriangle*>* parent, LLOctreeNode<LLVolumeTriangle, LLVolumeTriangle*>* child);
virtual void handleStateChange(const LLTreeNode<LLVolumeTriangle>* node) { }
virtual void handleChildRemoval(const LLOctreeNode<LLVolumeTriangle, LLVolumeTriangle*>* parent, const LLOctreeNode<LLVolumeTriangle, LLVolumeTriangle*>* child) { }
virtual void handleInsertion(const LLTreeNode<LLVolumeTriangle>* node, LLVolumeTriangle* tri) { }
virtual void handleRemoval(const LLTreeNode<LLVolumeTriangle>* node, LLVolumeTriangle* tri) { }
virtual void handleDestruction(const LLTreeNode<LLVolumeTriangle>* node) { }
public:
LL_ALIGN_16(LLVector4a mBounds[2]); // bounding box (center, size) of this node and all its children (tight fit to objects)
LL_ALIGN_16(LLVector4a mExtents[2]); // extents (min, max) of this node and all its children
};
class LLOctreeTriangleRayIntersect : public LLOctreeTraveler<LLVolumeTriangle, LLVolumeTriangle*>
{
public:
LLVector4a mStart;
LLVector4a mDir;
LLVector4a mEnd;
LLVector4a* mIntersection;
LLVector2* mTexCoord;
LLVector4a* mNormal;
LLVector4a* mTangent;
F32* mClosestT;
LLVolumeFace* mFace;
bool mHitFace;
const LLVolumeTriangle* mHitTriangle = nullptr;
LLOctreeTriangleRayIntersect(const LLVector4a& start, const LLVector4a& dir,
LLVolumeFace* face,
F32* closest_t,
LLVector4a* intersection,LLVector2* tex_coord, LLVector4a* normal, LLVector4a* tangent);
void traverse(const LLOctreeNode<LLVolumeTriangle, LLVolumeTriangle*>* node);
virtual void visit(const LLOctreeNode<LLVolumeTriangle, LLVolumeTriangle*>* node);
};
class LLVolumeOctreeValidate : public LLOctreeTraveler<LLVolumeTriangle, LLVolumeTriangle*>
{
virtual void visit(const LLOctreeNode<LLVolumeTriangle, LLVolumeTriangle*>* branch);
};
class LLVolumeOctreeRebound : public LLOctreeTravelerDepthFirst<LLVolumeTriangle, LLVolumeTriangle*>
{
public:
LLVolumeOctreeRebound()
{
}
virtual void visit(const LLOctreeNode<LLVolumeTriangle, LLVolumeTriangle*>* branch)
{ //this is a depth first traversal, so it's safe to assum all children have complete
//bounding data
LL_PROFILE_ZONE_SCOPED_CATEGORY_VOLUME;
LLVolumeOctreeListener* node = (LLVolumeOctreeListener*)branch->getListener(0);
LLVector4a& min = node->mExtents[0];
LLVector4a& max = node->mExtents[1];
if (!branch->isEmpty())
{ //node has data, find AABB that binds data set
const LLVolumeTriangle* tri = *(branch->getDataBegin());
//initialize min/max to first available vertex
min = *(tri->mV[0]);
max = *(tri->mV[0]);
for (LLOctreeNode<LLVolumeTriangle, LLVolumeTriangle*>::const_element_iter iter = branch->getDataBegin(); iter != branch->getDataEnd(); ++iter)
{ //for each triangle in node
//stretch by triangles in node
tri = *iter;
min.setMin(min, *tri->mV[0]);
min.setMin(min, *tri->mV[1]);
min.setMin(min, *tri->mV[2]);
max.setMax(max, *tri->mV[0]);
max.setMax(max, *tri->mV[1]);
max.setMax(max, *tri->mV[2]);
}
}
else if (branch->getChildCount() > 0)
{ //no data, but child nodes exist
LLVolumeOctreeListener* child = (LLVolumeOctreeListener*)branch->getChild(0)->getListener(0);
//initialize min/max to extents of first child
min = child->mExtents[0];
max = child->mExtents[1];
}
else
{
llassert(!branch->isLeaf()); // Empty leaf
}
for (U32 i = 0; i < branch->getChildCount(); ++i)
{ //stretch by child extents
LLVolumeOctreeListener* child = (LLVolumeOctreeListener*)branch->getChild(i)->getListener(0);
min.setMin(min, child->mExtents[0]);
max.setMax(max, child->mExtents[1]);
}
node->mBounds[0].setAdd(min, max);
node->mBounds[0].mul(0.5f);
node->mBounds[1].setSub(max, min);
node->mBounds[1].mul(0.5f);
}
};
class LLVolumeOctree : public LLOctreeRoot<LLVolumeTriangle, LLVolumeTriangle*>, public LLRefCount
{
public:
LLVolumeOctree(const LLVector4a& center, const LLVector4a& size)
:
LLOctreeRoot<LLVolumeTriangle, LLVolumeTriangle*>(center, size, nullptr),
LLRefCount()
{
new LLVolumeOctreeListener(this);
}
LLVolumeOctree()
: LLOctreeRoot<LLVolumeTriangle, LLVolumeTriangle*>(LLVector4a::getZero(), LLVector4a(1.f,1.f,1.f), nullptr),
LLRefCount()
{
new LLVolumeOctreeListener(this);
}
};
#endif
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