149 lines
3.5 KiB
C++
149 lines
3.5 KiB
C++
/**
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* @file v4math.cpp
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* @brief LLVector4 class implementation.
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*
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* $LicenseInfo:firstyear=2000&license=viewergpl$
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*
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* Copyright (c) 2000-2009, 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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#include "linden_common.h"
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//#include "vmath.h"
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#include "v3math.h"
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#include "v4math.h"
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#include "m4math.h"
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#include "m3math.h"
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#include "llquaternion.h"
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// LLVector4
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// Axis-Angle rotations
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/*
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const LLVector4& LLVector4::rotVec(F32 angle, const LLVector4 &vec)
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{
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if ( !vec.isExactlyZero() && angle )
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{
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*this = *this * LLMatrix4(angle, vec);
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}
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return *this;
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}
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const LLVector4& LLVector4::rotVec(F32 angle, F32 x, F32 y, F32 z)
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{
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LLVector3 vec(x, y, z);
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if ( !vec.isExactlyZero() && angle )
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{
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*this = *this * LLMatrix4(angle, vec);
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}
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return *this;
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}
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*/
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const LLVector4& LLVector4::rotVec(const LLMatrix4 &mat)
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{
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*this = *this * mat;
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return *this;
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}
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const LLVector4& LLVector4::rotVec(const LLQuaternion &q)
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{
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*this = *this * q;
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return *this;
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}
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const LLVector4& LLVector4::scaleVec(const LLVector4& vec)
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{
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mV[VX] *= vec.mV[VX];
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mV[VY] *= vec.mV[VY];
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mV[VZ] *= vec.mV[VZ];
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mV[VW] *= vec.mV[VW];
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return *this;
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}
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// Sets all values to absolute value of their original values
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// Returns TRUE if data changed
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BOOL LLVector4::abs()
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{
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BOOL ret = FALSE;
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if (mV[0] < 0.f) { mV[0] = -mV[0]; ret = TRUE; }
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if (mV[1] < 0.f) { mV[1] = -mV[1]; ret = TRUE; }
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if (mV[2] < 0.f) { mV[2] = -mV[2]; ret = TRUE; }
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if (mV[3] < 0.f) { mV[3] = -mV[3]; ret = TRUE; }
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return ret;
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}
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std::ostream& operator<<(std::ostream& s, const LLVector4 &a)
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{
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s << "{ " << a.mV[VX] << ", " << a.mV[VY] << ", " << a.mV[VZ] << ", " << a.mV[VW] << " }";
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return s;
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}
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// Non-member functions
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F32 angle_between( const LLVector4& a, const LLVector4& b )
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{
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LLVector4 an = a;
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LLVector4 bn = b;
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an.normalize();
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bn.normalize();
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F32 cosine = an * bn;
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F32 angle = (cosine >= 1.0f) ? 0.0f :
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(cosine <= -1.0f) ? F_PI :
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acos(cosine);
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return angle;
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}
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BOOL are_parallel(const LLVector4 &a, const LLVector4 &b, F32 epsilon)
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{
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LLVector4 an = a;
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LLVector4 bn = b;
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an.normalize();
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bn.normalize();
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F32 dot = an * bn;
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if ( (1.0f - fabs(dot)) < epsilon)
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return TRUE;
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return FALSE;
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}
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LLVector3 vec4to3(const LLVector4 &vec)
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{
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return LLVector3( vec.mV[VX], vec.mV[VY], vec.mV[VZ] );
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}
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LLVector4 vec3to4(const LLVector3 &vec)
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{
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return LLVector4(vec.mV[VX], vec.mV[VY], vec.mV[VZ]);
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}
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