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Diffstat (limited to 'indra/llmath/llbbox.cpp')
| -rw-r--r-- | indra/llmath/llbbox.cpp | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/indra/llmath/llbbox.cpp b/indra/llmath/llbbox.cpp new file mode 100644 index 0000000000..acf93a2a38 --- /dev/null +++ b/indra/llmath/llbbox.cpp @@ -0,0 +1,160 @@ +/** + * @file llbbox.cpp + * @brief General purpose bounding box class (Not axis aligned) + * + * $LicenseInfo:firstyear=2001&license=viewergpl$ + * + * Copyright (c) 2001-2009, 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. + * $/LicenseInfo$ + */ + +// self include +#include "llbbox.h" + +// library includes +#include "m4math.h" + +void LLBBox::addPointLocal(const LLVector3& p) +{ + if (mEmpty) + { + mMinLocal = p; + mMaxLocal = p; + mEmpty = FALSE; + } + else + { + mMinLocal.mV[VX] = llmin( p.mV[VX], mMinLocal.mV[VX] ); + mMinLocal.mV[VY] = llmin( p.mV[VY], mMinLocal.mV[VY] ); + mMinLocal.mV[VZ] = llmin( p.mV[VZ], mMinLocal.mV[VZ] ); + mMaxLocal.mV[VX] = llmax( p.mV[VX], mMaxLocal.mV[VX] ); + mMaxLocal.mV[VY] = llmax( p.mV[VY], mMaxLocal.mV[VY] ); + mMaxLocal.mV[VZ] = llmax( p.mV[VZ], mMaxLocal.mV[VZ] ); + } +} + +void LLBBox::addPointAgent( LLVector3 p) +{ + p -= mPosAgent; + p.rotVec( ~mRotation ); + addPointLocal( p ); +} + + +void LLBBox::addBBoxAgent(const LLBBox& b) +{ + if (mEmpty) + { + mPosAgent = b.mPosAgent; + mRotation = b.mRotation; + mMinLocal.clearVec(); + mMaxLocal.clearVec(); + } + LLVector3 vertex[8]; + vertex[0].setVec( b.mMinLocal.mV[VX], b.mMinLocal.mV[VY], b.mMinLocal.mV[VZ] ); + vertex[1].setVec( b.mMinLocal.mV[VX], b.mMinLocal.mV[VY], b.mMaxLocal.mV[VZ] ); + vertex[2].setVec( b.mMinLocal.mV[VX], b.mMaxLocal.mV[VY], b.mMinLocal.mV[VZ] ); + vertex[3].setVec( b.mMinLocal.mV[VX], b.mMaxLocal.mV[VY], b.mMaxLocal.mV[VZ] ); + vertex[4].setVec( b.mMaxLocal.mV[VX], b.mMinLocal.mV[VY], b.mMinLocal.mV[VZ] ); + vertex[5].setVec( b.mMaxLocal.mV[VX], b.mMinLocal.mV[VY], b.mMaxLocal.mV[VZ] ); + vertex[6].setVec( b.mMaxLocal.mV[VX], b.mMaxLocal.mV[VY], b.mMinLocal.mV[VZ] ); + vertex[7].setVec( b.mMaxLocal.mV[VX], b.mMaxLocal.mV[VY], b.mMaxLocal.mV[VZ] ); + + LLMatrix4 m( b.mRotation ); + m.translate( b.mPosAgent ); + m.translate( -mPosAgent ); + m.rotate( ~mRotation ); + + for( S32 i=0; i<8; i++ ) + { + addPointLocal( vertex[i] * m ); + } +} + + +void LLBBox::expand( F32 delta ) +{ + mMinLocal.mV[VX] -= delta; + mMinLocal.mV[VY] -= delta; + mMinLocal.mV[VZ] -= delta; + mMaxLocal.mV[VX] += delta; + mMaxLocal.mV[VY] += delta; + mMaxLocal.mV[VZ] += delta; +} + +LLVector3 LLBBox::localToAgent(const LLVector3& v) const +{ + LLMatrix4 m( mRotation ); + m.translate( mPosAgent ); + return v * m; +} + +LLVector3 LLBBox::agentToLocal(const LLVector3& v) const +{ + LLMatrix4 m; + m.translate( -mPosAgent ); + m.rotate( ~mRotation ); // inverse rotation + return v * m; +} + +LLVector3 LLBBox::localToAgentBasis(const LLVector3& v) const +{ + LLMatrix4 m( mRotation ); + return v * m; +} + +LLVector3 LLBBox::agentToLocalBasis(const LLVector3& v) const +{ + LLMatrix4 m( ~mRotation ); // inverse rotation + return v * m; +} + +BOOL LLBBox::containsPointLocal(const LLVector3& p) const +{ + if ( (p.mV[VX] < mMinLocal.mV[VX]) + ||(p.mV[VX] > mMaxLocal.mV[VX]) + ||(p.mV[VY] < mMinLocal.mV[VY]) + ||(p.mV[VY] > mMaxLocal.mV[VY]) + ||(p.mV[VZ] < mMinLocal.mV[VZ]) + ||(p.mV[VZ] > mMaxLocal.mV[VZ])) + { + return FALSE; + } + return TRUE; +} + +BOOL LLBBox::containsPointAgent(const LLVector3& p) const +{ + LLVector3 point_local = agentToLocal(p); + return containsPointLocal(point_local); +} + + +/* +LLBBox operator*(const LLBBox &a, const LLMatrix4 &b) +{ + return LLBBox( a.mMin * b, a.mMax * b ); +} +*/ |