106 lines
3.6 KiB
C++
106 lines
3.6 KiB
C++
/**
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* @file llbbox.h
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* @brief General purpose bounding box class
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*
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* $LicenseInfo:firstyear=2001&license=viewergpl$
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*
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* Copyright (c) 2001-2009, Linden Research, Inc.
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*
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* Second Life Viewer Source Code
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* The source code in this file ("Source Code") is provided by Linden Lab
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* to you under the terms of the GNU General Public License, version 2.0
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* ("GPL"), unless you have obtained a separate licensing agreement
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* ("Other License"), formally executed by you and Linden Lab. Terms of
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* the GPL can be found in doc/GPL-license.txt in this distribution, or
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* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
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*
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* There are special exceptions to the terms and conditions of the GPL as
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* it is applied to this Source Code. View the full text of the exception
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* in the file doc/FLOSS-exception.txt in this software distribution, or
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* online at
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* http://secondlifegrid.net/programs/open_source/licensing/flossexception
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*
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* By copying, modifying or distributing this software, you acknowledge
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* that you have read and understood your obligations described above,
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* and agree to abide by those obligations.
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*
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* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
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* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
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* COMPLETENESS OR PERFORMANCE.
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* $/LicenseInfo$
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*/
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#ifndef LL_BBOX_H
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#define LL_BBOX_H
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#include "v3math.h"
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#include "llquaternion.h"
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// Note: "local space" for an LLBBox is defined relative to agent space in terms of
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// a translation followed by a rotation. There is no scale term since the LLBBox's min and
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// max are not necessarily symetrical and define their own extents.
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class LLBBox
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{
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public:
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LLBBox() {mEmpty = TRUE;}
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LLBBox( const LLVector3& pos_agent,
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const LLQuaternion& rot,
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const LLVector3& min_local,
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const LLVector3& max_local )
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:
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mMinLocal( min_local ), mMaxLocal( max_local ), mPosAgent(pos_agent), mRotation( rot), mEmpty( TRUE )
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{}
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// Default copy constructor is OK.
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const LLVector3& getPositionAgent() const { return mPosAgent; }
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const LLQuaternion& getRotation() const { return mRotation; }
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const LLVector3& getMinLocal() const { return mMinLocal; }
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void setMinLocal( const LLVector3& min ) { mMinLocal = min; }
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const LLVector3& getMaxLocal() const { return mMaxLocal; }
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void setMaxLocal( const LLVector3& max ) { mMaxLocal = max; }
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LLVector3 getCenterLocal() const { return (mMaxLocal - mMinLocal) * 0.5f + mMinLocal; }
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LLVector3 getCenterAgent() const { return localToAgent( getCenterLocal() ); }
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LLVector3 getExtentLocal() const { return mMaxLocal - mMinLocal; }
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BOOL containsPointLocal(const LLVector3& p) const;
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BOOL containsPointAgent(const LLVector3& p) const;
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BOOL intersects(const LLBBox& b) const;
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void addPointAgent(LLVector3 p);
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void addBBoxAgent(const LLBBox& b);
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void addPointLocal(const LLVector3& p);
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void addBBoxLocal(const LLBBox& b) { addPointLocal( b.mMinLocal ); addPointLocal( b.mMaxLocal ); }
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void expand( F32 delta );
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LLVector3 localToAgent( const LLVector3& v ) const;
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LLVector3 agentToLocal( const LLVector3& v ) const;
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// Changes rotation but not position
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LLVector3 localToAgentBasis(const LLVector3& v) const;
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LLVector3 agentToLocalBasis(const LLVector3& v) const;
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// friend LLBBox operator*(const LLBBox& a, const LLMatrix4& b);
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private:
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LLVector3 mMinLocal;
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LLVector3 mMaxLocal;
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LLVector3 mPosAgent; // Position relative to Agent's Region
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LLQuaternion mRotation;
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BOOL mEmpty; // Nothing has been added to this bbox yet
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};
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//LLBBox operator*(const LLBBox &a, const LLMatrix4 &b);
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#endif // LL_BBOX_H
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