/indra/llmath/v4math.cpp
C++ | 142 lines | 69 code | 22 blank | 51 comment | 5 complexity | d39650cf663e46ccf0d587cda1de0d2a MD5 | raw file
Possible License(s): LGPL-2.1
- /**
- * @file v4math.cpp
- * @brief LLVector4 class implementation.
- *
- * $LicenseInfo:firstyear=2000&license=viewerlgpl$
- * 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
- * $/LicenseInfo$
- */
- #include "linden_common.h"
- //#include "vmath.h"
- #include "v3math.h"
- #include "v4math.h"
- #include "m4math.h"
- #include "m3math.h"
- #include "llquaternion.h"
- // LLVector4
- // Axis-Angle rotations
- /*
- const LLVector4& LLVector4::rotVec(F32 angle, const LLVector4 &vec)
- {
- if ( !vec.isExactlyZero() && angle )
- {
- *this = *this * LLMatrix4(angle, vec);
- }
- return *this;
- }
- const LLVector4& LLVector4::rotVec(F32 angle, F32 x, F32 y, F32 z)
- {
- LLVector3 vec(x, y, z);
- if ( !vec.isExactlyZero() && angle )
- {
- *this = *this * LLMatrix4(angle, vec);
- }
- return *this;
- }
- */
- const LLVector4& LLVector4::rotVec(const LLMatrix4 &mat)
- {
- *this = *this * mat;
- return *this;
- }
- const LLVector4& LLVector4::rotVec(const LLQuaternion &q)
- {
- *this = *this * q;
- return *this;
- }
- const LLVector4& LLVector4::scaleVec(const LLVector4& vec)
- {
- mV[VX] *= vec.mV[VX];
- mV[VY] *= vec.mV[VY];
- mV[VZ] *= vec.mV[VZ];
- mV[VW] *= vec.mV[VW];
- return *this;
- }
- // Sets all values to absolute value of their original values
- // Returns TRUE if data changed
- BOOL LLVector4::abs()
- {
- BOOL ret = FALSE;
- if (mV[0] < 0.f) { mV[0] = -mV[0]; ret = TRUE; }
- if (mV[1] < 0.f) { mV[1] = -mV[1]; ret = TRUE; }
- if (mV[2] < 0.f) { mV[2] = -mV[2]; ret = TRUE; }
- if (mV[3] < 0.f) { mV[3] = -mV[3]; ret = TRUE; }
- return ret;
- }
- std::ostream& operator<<(std::ostream& s, const LLVector4 &a)
- {
- s << "{ " << a.mV[VX] << ", " << a.mV[VY] << ", " << a.mV[VZ] << ", " << a.mV[VW] << " }";
- return s;
- }
- // Non-member functions
- F32 angle_between( const LLVector4& a, const LLVector4& b )
- {
- LLVector4 an = a;
- LLVector4 bn = b;
- an.normalize();
- bn.normalize();
- F32 cosine = an * bn;
- F32 angle = (cosine >= 1.0f) ? 0.0f :
- (cosine <= -1.0f) ? F_PI :
- acos(cosine);
- return angle;
- }
- BOOL are_parallel(const LLVector4 &a, const LLVector4 &b, F32 epsilon)
- {
- LLVector4 an = a;
- LLVector4 bn = b;
- an.normalize();
- bn.normalize();
- F32 dot = an * bn;
- if ( (1.0f - fabs(dot)) < epsilon)
- return TRUE;
- return FALSE;
- }
- LLVector3 vec4to3(const LLVector4 &vec)
- {
- return LLVector3( vec.mV[VX], vec.mV[VY], vec.mV[VZ] );
- }
- LLVector4 vec3to4(const LLVector3 &vec)
- {
- return LLVector4(vec.mV[VX], vec.mV[VY], vec.mV[VZ]);
- }