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/**
* @file v3math.cpp
* @brief LLVector3 class implementation.
*
* Copyright (c) 2000-2007, Linden Research, Inc.
*
* 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://secondlife.com/developers/opensource/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://secondlife.com/developers/opensource/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.
*/
#include "linden_common.h"
#include "v3math.h"
//#include "vmath.h"
#include "v4math.h"
#include "m4math.h"
#include "m3math.h"
#include "llquaternion.h"
#include "llquantize.h"
#include "v3dmath.h"
// LLVector3
// WARNING: Don't use these for global const definitions!
// For example:
// const LLQuaternion(0.5f * F_PI, LLVector3::zero);
// at the top of a *.cpp file might not give you what you think.
const LLVector3 LLVector3::zero(0,0,0);
const LLVector3 LLVector3::x_axis(1.f, 0, 0);
const LLVector3 LLVector3::y_axis(0, 1.f, 0);
const LLVector3 LLVector3::z_axis(0, 0, 1.f);
const LLVector3 LLVector3::x_axis_neg(-1.f, 0, 0);
const LLVector3 LLVector3::y_axis_neg(0, -1.f, 0);
const LLVector3 LLVector3::z_axis_neg(0, 0, -1.f);
const LLVector3 LLVector3::all_one(1.f,1.f,1.f);
// Clamps each values to range (min,max).
// Returns TRUE if data changed.
BOOL LLVector3::clamp(F32 min, F32 max)
{
BOOL ret = FALSE;
if (mV[0] < min) { mV[0] = min; ret = TRUE; }
if (mV[1] < min) { mV[1] = min; ret = TRUE; }
if (mV[2] < min) { mV[2] = min; ret = TRUE; }
if (mV[0] > max) { mV[0] = max; ret = TRUE; }
if (mV[1] > max) { mV[1] = max; ret = TRUE; }
if (mV[2] > max) { mV[2] = max; ret = TRUE; }
return ret;
}
// Sets all values to absolute value of their original values
// Returns TRUE if data changed
BOOL LLVector3::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; }
return ret;
}
// Quatizations
void LLVector3::quantize16(F32 lowerxy, F32 upperxy, F32 lowerz, F32 upperz)
{
F32 x = mV[VX];
F32 y = mV[VY];
F32 z = mV[VZ];
x = U16_to_F32(F32_to_U16(x, lowerxy, upperxy), lowerxy, upperxy);
y = U16_to_F32(F32_to_U16(y, lowerxy, upperxy), lowerxy, upperxy);
z = U16_to_F32(F32_to_U16(z, lowerz, upperz), lowerz, upperz);
mV[VX] = x;
mV[VY] = y;
mV[VZ] = z;
}
void LLVector3::quantize8(F32 lowerxy, F32 upperxy, F32 lowerz, F32 upperz)
{
mV[VX] = U8_to_F32(F32_to_U8(mV[VX], lowerxy, upperxy), lowerxy, upperxy);;
mV[VY] = U8_to_F32(F32_to_U8(mV[VY], lowerxy, upperxy), lowerxy, upperxy);
mV[VZ] = U8_to_F32(F32_to_U8(mV[VZ], lowerz, upperz), lowerz, upperz);
}
void LLVector3::snap(S32 sig_digits)
{
mV[VX] = snap_to_sig_figs(mV[VX], sig_digits);
mV[VY] = snap_to_sig_figs(mV[VY], sig_digits);
mV[VZ] = snap_to_sig_figs(mV[VZ], sig_digits);
}
std::ostream& operator<<(std::ostream& s, const LLVector3 &a)
{
s << "{ " << a.mV[VX] << ", " << a.mV[VY] << ", " << a.mV[VZ] << " }";
return s;
}
const LLVector3& LLVector3::rotVec(const LLMatrix3 &mat)
{
*this = *this * mat;
return *this;
}
const LLVector3& LLVector3::rotVec(const LLQuaternion &q)
{
*this = *this * q;
return *this;
}
const LLVector3& LLVector3::rotVec(F32 angle, const LLVector3 &vec)
{
if ( !vec.isExactlyZero() && angle )
{
*this = *this * LLMatrix3(angle, vec);
}
return *this;
}
const LLVector3& LLVector3::rotVec(F32 angle, F32 x, F32 y, F32 z)
{
LLVector3 vec(x, y, z);
if ( !vec.isExactlyZero() && angle )
{
*this = *this * LLMatrix3(angle, vec);
}
return *this;
}
const LLVector3& LLVector3::scaleVec(const LLVector3& vec)
{
mV[VX] *= vec.mV[VX];
mV[VY] *= vec.mV[VY];
mV[VZ] *= vec.mV[VZ];
return *this;
}
LLVector3 LLVector3::scaledVec(const LLVector3& vec) const
{
LLVector3 ret = LLVector3(*this);
ret.scaleVec(vec);
return ret;
}
const LLVector3& LLVector3::setVec(const LLVector3d &vec)
{
mV[0] = (F32)vec.mdV[0];
mV[1] = (F32)vec.mdV[1];
mV[2] = (F32)vec.mdV[2];
return (*this);
}
const LLVector3& LLVector3::setVec(const LLVector4 &vec)
{
mV[0] = vec.mV[0];
mV[1] = vec.mV[1];
mV[2] = vec.mV[2];
return (*this);
}
LLVector3::LLVector3(const LLVector3d &vec)
{
mV[VX] = (F32)vec.mdV[VX];
mV[VY] = (F32)vec.mdV[VY];
mV[VZ] = (F32)vec.mdV[VZ];
}
LLVector3::LLVector3(const LLVector4 &vec)
{
mV[VX] = (F32)vec.mV[VX];
mV[VY] = (F32)vec.mV[VY];
mV[VZ] = (F32)vec.mV[VZ];
}
const LLVector3& operator*=(LLVector3 &a, const LLQuaternion &rot)
{
const F32 rw = - rot.mQ[VX] * a.mV[VX] - rot.mQ[VY] * a.mV[VY] - rot.mQ[VZ] * a.mV[VZ];
const F32 rx = rot.mQ[VW] * a.mV[VX] + rot.mQ[VY] * a.mV[VZ] - rot.mQ[VZ] * a.mV[VY];
const F32 ry = rot.mQ[VW] * a.mV[VY] + rot.mQ[VZ] * a.mV[VX] - rot.mQ[VX] * a.mV[VZ];
const F32 rz = rot.mQ[VW] * a.mV[VZ] + rot.mQ[VX] * a.mV[VY] - rot.mQ[VY] * a.mV[VX];
a.mV[VX] = - rw * rot.mQ[VX] + rx * rot.mQ[VW] - ry * rot.mQ[VZ] + rz * rot.mQ[VY];
a.mV[VY] = - rw * rot.mQ[VY] + ry * rot.mQ[VW] - rz * rot.mQ[VX] + rx * rot.mQ[VZ];
a.mV[VZ] = - rw * rot.mQ[VZ] + rz * rot.mQ[VW] - rx * rot.mQ[VY] + ry * rot.mQ[VX];
return a;
}
// static
BOOL LLVector3::parseVector3(const char* buf, LLVector3* value)
{
if( buf == NULL || buf[0] == '\0' || value == NULL)
{
return FALSE;
}
LLVector3 v;
S32 count = sscanf( buf, "%f %f %f", v.mV + 0, v.mV + 1, v.mV + 2 );
if( 3 == count )
{
value->setVec( v );
return TRUE;
}
return FALSE;
}
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