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/**
* @file llbbox.h
* @brief General purpose bounding box class
*
* $LicenseInfo:firstyear=2001&license=viewergpl$
*
* Copyright (c) 2001-2008, Linden Research, Inc.
*
* Second Life Viewer Source Code
* The source code in this file ("Source Code") is provided by Linden Lab
* to you under the terms of the GNU General Public License, version 2.0
* ("GPL"), unless you have obtained a separate licensing agreement
* ("Other License"), formally executed by you and Linden Lab. Terms of
* the GPL can be found in doc/GPL-license.txt in this distribution, or
* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
*
* There are special exceptions to the terms and conditions of the GPL as
* it is applied to this Source Code. View the full text of the exception
* in the file doc/FLOSS-exception.txt in this software distribution, or
* online at http://secondlifegrid.net/programs/open_source/licensing/flossexception
*
* By copying, modifying or distributing this software, you acknowledge
* that you have read and understood your obligations described above,
* and agree to abide by those obligations.
*
* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
* COMPLETENESS OR PERFORMANCE.
* $/LicenseInfo$
*/
#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; }
const LLVector3& getMinLocal() const { return mMinLocal; }
void setMinLocal( const LLVector3& min ) { mMinLocal = min; }
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;
BOOL intersects(const LLBBox& b) 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;
// 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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