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/**
* @file llbbox.h
* @brief General purpose bounding box class
*
* $LicenseInfo:firstyear=2001&license=viewerlgpl$
* 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_BBOX_H
#define LL_BBOX_H
#include "v3math.h"
#include "llquaternion.h"
// Note: "local space" for an LLBBox is defined relative to agent space in terms of
// a translation followed by a rotation. There is no scale term since the LLBBox's min and
// max are not necessarily symetrical and define their own extents.
class LLBBox
{
public:
LLBBox() {mEmpty = true;}
LLBBox( const LLVector3& pos_agent,
const LLQuaternion& rot,
const LLVector3& min_local,
const LLVector3& max_local )
:
mMinLocal( min_local ), mMaxLocal( max_local ), mPosAgent(pos_agent), mRotation( rot), mEmpty( true )
{}
// Default copy constructor is OK.
const LLVector3& getPositionAgent() const { return mPosAgent; }
const LLQuaternion& getRotation() const { return mRotation; }
LLVector3 getMinAgent() const;
const LLVector3& getMinLocal() const { return mMinLocal; }
void setMinLocal( const LLVector3& min ) { mMinLocal = min; }
LLVector3 getMaxAgent() const;
const LLVector3& getMaxLocal() const { return mMaxLocal; }
void setMaxLocal( const LLVector3& max ) { mMaxLocal = max; }
LLVector3 getCenterLocal() const { return (mMaxLocal - mMinLocal) * 0.5f + mMinLocal; }
LLVector3 getCenterAgent() const { return localToAgent( getCenterLocal() ); }
LLVector3 getExtentLocal() const { return mMaxLocal - mMinLocal; }
bool containsPointLocal(const LLVector3& p) const;
bool containsPointAgent(const LLVector3& p) const;
void addPointAgent(LLVector3 p);
void addBBoxAgent(const LLBBox& b);
void addPointLocal(const LLVector3& p);
void addBBoxLocal(const LLBBox& b) { addPointLocal( b.mMinLocal ); addPointLocal( b.mMaxLocal ); }
void expand( F32 delta );
LLVector3 localToAgent( const LLVector3& v ) const;
LLVector3 agentToLocal( const LLVector3& v ) const;
// Changes rotation but not position
LLVector3 localToAgentBasis(const LLVector3& v) const;
LLVector3 agentToLocalBasis(const LLVector3& v) const;
// Get the smallest possible axis aligned bbox that contains this bbox
LLBBox getAxisAligned() const;
// friend LLBBox operator*(const LLBBox& a, const LLMatrix4& b);
private:
LLVector3 mMinLocal;
LLVector3 mMaxLocal;
LLVector3 mPosAgent; // Position relative to Agent's Region
LLQuaternion mRotation;
bool mEmpty; // Nothing has been added to this bbox yet
};
//LLBBox operator*(const LLBBox &a, const LLMatrix4 &b);
#endif // LL_BBOX_H
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