1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
|
/**
* @file v4math.cpp
* @brief LLVector4 class implementation.
*
* $LicenseInfo:firstyear=2000&license=viewergpl$
*
* Copyright (c) 2000-2008, 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.
* $/LicenseInfo$
*/
#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]);
}
|
