mirror of
https://github.com/TTimo/GtkRadiant.git
synced 2024-11-13 00:24:29 +00:00
162 lines
3.3 KiB
C
162 lines
3.3 KiB
C
/*
|
|
Copyright (C) 1999-2007 id Software, Inc. and contributors.
|
|
For a list of contributors, see the accompanying CONTRIBUTORS file.
|
|
|
|
This file is part of GtkRadiant.
|
|
|
|
GtkRadiant is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
GtkRadiant 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 General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with GtkRadiant; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
// mathlib.c -- math primitives
|
|
|
|
#include "cmdlib.h"
|
|
#include "mathlib.h"
|
|
|
|
vec3_t vec3_origin = {0,0,0};
|
|
|
|
|
|
double VectorLength( vec3_t v ){
|
|
int i;
|
|
double length;
|
|
|
|
length = 0;
|
|
for ( i = 0 ; i < 3 ; i++ )
|
|
length += v[i] * v[i];
|
|
length = sqrt( length ); // FIXME
|
|
|
|
return length;
|
|
}
|
|
|
|
qboolean VectorCompare( vec3_t v1, vec3_t v2 ){
|
|
int i;
|
|
|
|
for ( i = 0 ; i < 3 ; i++ )
|
|
if ( fabs( v1[i] - v2[i] ) > EQUAL_EPSILON ) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
vec_t Q_rint( vec_t in ){
|
|
return floor( in + 0.5 );
|
|
}
|
|
|
|
void VectorMA( vec3_t va, double scale, vec3_t vb, vec3_t vc ){
|
|
vc[0] = va[0] + scale * vb[0];
|
|
vc[1] = va[1] + scale * vb[1];
|
|
vc[2] = va[2] + scale * vb[2];
|
|
}
|
|
|
|
void CrossProduct( vec3_t v1, vec3_t v2, vec3_t cross ){
|
|
cross[0] = v1[1] * v2[2] - v1[2] * v2[1];
|
|
cross[1] = v1[2] * v2[0] - v1[0] * v2[2];
|
|
cross[2] = v1[0] * v2[1] - v1[1] * v2[0];
|
|
}
|
|
|
|
vec_t _DotProduct( vec3_t v1, vec3_t v2 ){
|
|
return v1[0] * v2[0] + v1[1] * v2[1] + v1[2] * v2[2];
|
|
}
|
|
|
|
void _VectorSubtract( vec3_t va, vec3_t vb, vec3_t out ){
|
|
out[0] = va[0] - vb[0];
|
|
out[1] = va[1] - vb[1];
|
|
out[2] = va[2] - vb[2];
|
|
}
|
|
|
|
void _VectorAdd( vec3_t va, vec3_t vb, vec3_t out ){
|
|
out[0] = va[0] + vb[0];
|
|
out[1] = va[1] + vb[1];
|
|
out[2] = va[2] + vb[2];
|
|
}
|
|
|
|
void _VectorCopy( vec3_t in, vec3_t out ){
|
|
out[0] = in[0];
|
|
out[1] = in[1];
|
|
out[2] = in[2];
|
|
}
|
|
|
|
void _VectorScale( vec3_t v, vec_t scale, vec3_t out ){
|
|
out[0] = v[0] * scale;
|
|
out[1] = v[1] * scale;
|
|
out[2] = v[2] * scale;
|
|
}
|
|
|
|
vec_t VectorNormalize( vec3_t in, vec3_t out ){
|
|
vec_t length, ilength;
|
|
|
|
length = sqrt( in[0] * in[0] + in[1] * in[1] + in[2] * in[2] );
|
|
if ( length == 0 ) {
|
|
VectorClear( out );
|
|
return 0;
|
|
}
|
|
|
|
ilength = 1.0 / length;
|
|
out[0] = in[0] * ilength;
|
|
out[1] = in[1] * ilength;
|
|
out[2] = in[2] * ilength;
|
|
|
|
return length;
|
|
}
|
|
|
|
vec_t ColorNormalize( vec3_t in, vec3_t out ){
|
|
float max, scale;
|
|
|
|
max = in[0];
|
|
if ( in[1] > max ) {
|
|
max = in[1];
|
|
}
|
|
if ( in[2] > max ) {
|
|
max = in[2];
|
|
}
|
|
|
|
if ( max == 0 ) {
|
|
return 0;
|
|
}
|
|
|
|
scale = 1.0 / max;
|
|
|
|
VectorScale( in, scale, out );
|
|
|
|
return max;
|
|
}
|
|
|
|
|
|
|
|
void VectorInverse( vec3_t v ){
|
|
v[0] = -v[0];
|
|
v[1] = -v[1];
|
|
v[2] = -v[2];
|
|
}
|
|
|
|
void ClearBounds( vec3_t mins, vec3_t maxs ){
|
|
mins[0] = mins[1] = mins[2] = 99999;
|
|
maxs[0] = maxs[1] = maxs[2] = -99999;
|
|
}
|
|
|
|
void AddPointToBounds( vec3_t v, vec3_t mins, vec3_t maxs ){
|
|
int i;
|
|
vec_t val;
|
|
|
|
for ( i = 0 ; i < 3 ; i++ )
|
|
{
|
|
val = v[i];
|
|
if ( val < mins[i] ) {
|
|
mins[i] = val;
|
|
}
|
|
if ( val > maxs[i] ) {
|
|
maxs[i] = val;
|
|
}
|
|
}
|
|
}
|