2 Copyright (C) 1999-2006 Id Software, Inc. and contributors.
3 For a list of contributors, see the accompanying CONTRIBUTORS file.
5 This file is part of GtkRadiant.
7 GtkRadiant is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 GtkRadiant is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GtkRadiant; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 // mathlib.c -- math primitives
26 vec3_t vec3_origin = {0,0,0};
29 double VectorLength(vec3_t v)
35 for (i=0 ; i< 3 ; i++)
37 length = sqrt (length); // FIXME
42 qboolean VectorCompare (vec3_t v1, vec3_t v2)
47 if (fabs(v1[i]-v2[i]) > EQUAL_EPSILON)
53 vec_t Q_rint (vec_t in)
55 return floor (in + 0.5);
58 void VectorMA (vec3_t va, double scale, vec3_t vb, vec3_t vc)
60 vc[0] = va[0] + scale*vb[0];
61 vc[1] = va[1] + scale*vb[1];
62 vc[2] = va[2] + scale*vb[2];
65 void CrossProduct (vec3_t v1, vec3_t v2, vec3_t cross)
67 cross[0] = v1[1]*v2[2] - v1[2]*v2[1];
68 cross[1] = v1[2]*v2[0] - v1[0]*v2[2];
69 cross[2] = v1[0]*v2[1] - v1[1]*v2[0];
72 vec_t _DotProduct (vec3_t v1, vec3_t v2)
74 return v1[0]*v2[0] + v1[1]*v2[1] + v1[2]*v2[2];
77 void _VectorSubtract (vec3_t va, vec3_t vb, vec3_t out)
84 void _VectorAdd (vec3_t va, vec3_t vb, vec3_t out)
91 void _VectorCopy (vec3_t in, vec3_t out)
98 void _VectorScale (vec3_t v, vec_t scale, vec3_t out)
100 out[0] = v[0] * scale;
101 out[1] = v[1] * scale;
102 out[2] = v[2] * scale;
105 vec_t VectorNormalize (vec3_t in, vec3_t out)
107 vec_t length, ilength;
109 length = sqrt (in[0]*in[0] + in[1]*in[1] + in[2]*in[2]);
116 ilength = 1.0/length;
117 out[0] = in[0]*ilength;
118 out[1] = in[1]*ilength;
119 out[2] = in[2]*ilength;
124 vec_t ColorNormalize (vec3_t in, vec3_t out)
139 VectorScale (in, scale, out);
146 void VectorInverse (vec3_t v)
153 void ClearBounds (vec3_t mins, vec3_t maxs)
155 mins[0] = mins[1] = mins[2] = 99999;
156 maxs[0] = maxs[1] = maxs[2] = -99999;
159 void AddPointToBounds (vec3_t v, vec3_t mins, vec3_t maxs)
164 for (i=0 ; i<3 ; i++)