/usr/include/geomview/vec4.h is in libgeomview-dev 1.9.4-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | /* Copyright (C) 1992-1998 The Geometry Center
* Copyright (C) 1998-2000 Stuart Levy, Tamara Munzner, Mark Phillips
*
* This file is part of Geomview.
*
* Geomview 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; either version 2, or (at your option)
* any later version.
*
* Geomview 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 Geomview; see the file COPYING. If not, write
* to the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139,
* USA, or visit http://www.gnu.org.
*/
#include <math.h>
typedef double point4[4];
typedef double plane4[4];
typedef double matrix4[4][4];
#define ABS(aaa) (( (aaa) > 0) ? (aaa) : -(aaa))
#define VDOT3(v0,v1) (v0[0]*v1[0] + v0[1]*v1[1] + v0[2]*v1[2])
#define INPRO31(v0,v1) (v0[0]*v1[0] + v0[1]*v1[1] + v0[2]*v1[2] - v0[3]*v1[3])
#define INPRO4(v0,v1) (v0[0]*v1[0] + v0[1]*v1[1] + v0[2]*v1[2] + v0[3]*v1[3])
#define MAGNITUDE3(v0) (sqrt (VDOT3(v0, v0)))
#define MAGNITUDE31(v0) (sqrt (ABS (INPRO31(v0, v0))))
#define MAGNITUDE4(v0) (sqrt (INPRO4(v0, v0)))
#define PROJECT4(v0) \
{float d = v0[3]; \
if (d) { \
d = 1.0/d; \
v0[0] = v0[0] * d; \
v0[1] = v0[1] * d; \
v0[2] = v0[2] * d; \
v0[3] = 1.0; }}
#define NORMALIZE3(v0) \
{double xxx; \
if (xxx = MAGNITUDE3(v0)) \
{v0[0] /= xxx; v0[1] /= xxx; v0[2] /= xxx; } }
#define NORMALIZE31(v) \
{double tmp = INPRO31(v,v); \
if (tmp) { tmp = 1.0/sqrt(ABS(tmp)); v[0] *= tmp; v[1] *= tmp; v[2] *= tmp; v[3] *= tmp; }}
#define NORMALIZE4(v) \
{double tmp = INPRO4(v,v); \
if (tmp) { tmp = 1.0/sqrt(ABS(tmp)); v[0] *= tmp; v[1] *= tmp; v[2] *= tmp; v[3] *= tmp; }}
#define VPRINT3(name,v) printf("name\t%f %f %f\n",v[0],v[1],v[2]);
#define VPRINT4(name,v) printf("name\t%f %f %f %f %f\n",v[0],v[1],v[2],v[3]);
#define VADD3(v0,v1,v2) \
{v2[0] = v0[0] + v1[0]; \
v2[1] = v0[1] + v1[1]; \
v2[2] = v0[2] + v1[2]; \
v2[3] = 1.0; }
#define VADD4(v0,v1,v2) \
{v2[0] = v0[0] + v1[0]; \
v2[1] = v0[1] + v1[1]; \
v2[2] = v0[2] + v1[2]; \
v2[3] = v0[3] + v1[3]; }
#define VSUB3(v0,v1,v2) \
{v2[0] = v0[0] - v1[0]; \
v2[1] = v0[1] - v1[1]; \
v2[2] = v0[2] - v1[2]; \
v2[3] = 1.0;}
#define VSUB4(v0,v1,v2) \
{v2[0] = v0[0] - v1[0]; \
v2[1] = v0[1] - v1[1]; \
v2[2] = v0[2] - v1[2]; \
v2[3] = v0[3] - v1[3];}
#define MIDPOINT4(v0,v1,v2) \
{v2[0] = (v0[0] + v1[0])/2.0; \
v2[1] = (v0[1] + v1[1])/2.0; \
v2[2] = (v0[2] + v1[2])/2.0; \
v2[3] = (v0[3] + v1[3])/2.0; }
#define VISZERO4(v) (v[0] == 0 && v[1] == 0 && v[2] == 0 && v[3] == 0)
#define MIDPOINT31(v0,v1,v2) \
{float m00, m11, a,v3[4]; \
VSUB4(v0, v1, v3); \
if (VISZERO4(v3)) \
VCOPY4(v0,v2) \
else { \
m00 = INPRO31(v0,v3); \
m11 = INPRO31(v1,v3); \
v2[0] = m11*v0[0] - m00*v1[0]; \
v2[1] = m11*v0[1] - m00*v1[1]; \
v2[2] = m11*v0[2] - m00*v1[2]; \
v2[3] = m11*v0[3] - m00*v1[3]; }}
#define XPRO3(v0,v1,v2) \
{v2[0] = v0[1]*v1[2] - v0[2]*v1[1]; \
v2[1] = v0[2]*v1[0] - v0[0]*v1[2]; \
v2[2] = v0[0]*v1[1] - v0[1]*v1[0]; }
#define VSCALE3(v0, s, v1) \
{v1[0] = s * v0[0]; \
v1[1] = s * v0[1]; \
v1[2] = s * v0[2]; }
#define VSCALE4(v0, s, v1) \
{v1[0] = s * v0[0]; \
v1[1] = s * v0[1]; \
v1[2] = s * v0[2]; \
v1[3] = s * v0[3]; }
#define VCOPY3(v0, v1) \
{v1[0] = v0[0]; \
v1[1] = v0[1]; \
v1[2] = v0[2]; }
#define VCOPY4(v0, v1) \
{v1[0] = v0[0]; \
v1[1] = v0[1]; \
v1[2] = v0[2]; \
v1[3] = v0[3];}
#define VZERO3(v0) \
{v0[0] = 0; \
v0[1] = 0; \
v0[2] = 0; \
v0[3] = 1.0; }
#define COPYMAT4(m1, m2) \
memcpy(m2, m1, (sizeof(m1[0][0]) * 16));
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