/*
-Copyright (C) 1999-2006 Id Software, Inc. and contributors.
-For a list of contributors, see the accompanying CONTRIBUTORS file.
+ Copyright (C) 1999-2006 Id Software, Inc. and contributors.
+ For a list of contributors, see the accompanying CONTRIBUTORS file.
-This file is part of GtkRadiant.
+ 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 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.
+ 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
-*/
+ 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
+ */
#include "math_quaternion.h"
#include "math_matrix.h"
}
void toQuat( mat3_t &src, quat_t &dst ) {
- float trace;
- float s;
- int i;
- int j;
- int k;
+ float trace;
+ float s;
+ int i;
+ int j;
+ int k;
- static int next[ 3 ] = { 1, 2, 0 };
+ static int next[ 3 ] = { 1, 2, 0 };
trace = src[ 0 ][ 0 ] + src[ 1 ][ 1 ] + src[ 2 ][ 2 ];
if ( trace > 0.0f ) {
s = ( float )sqrt( trace + 1.0f );
dst.w = s * 0.5f;
s = 0.5f / s;
-
+
dst.x = ( src[ 2 ][ 1 ] - src[ 1 ][ 2 ] ) * s;
dst.y = ( src[ 0 ][ 2 ] - src[ 2 ][ 0 ] ) * s;
dst.z = ( src[ 1 ][ 0 ] - src[ 0 ][ 1 ] ) * s;
- } else {
+ }
+ else {
i = 0;
if ( src[ 1 ][ 1 ] > src[ 0 ][ 0 ] ) {
i = 1;
i = 2;
}
- j = next[ i ];
+ j = next[ i ];
k = next[ j ];
-
+
s = ( float )sqrt( ( src[ i ][ i ] - ( src[ j ][ j ] + src[ k ][ k ] ) ) + 1.0f );
dst[ i ] = s * 0.5f;
-
+
s = 0.5f / s;
-
- dst.w = ( src[ k ][ j ] - src[ j ][ k ] ) * s;
- dst[ j ] = ( src[ j ][ i ] + src[ i ][ j ] ) * s;
- dst[ k ] = ( src[ k ][ i ] + src[ i ][ k ] ) * s;
+
+ dst.w = ( src[ k ][ j ] - src[ j ][ k ] ) * s;
+ dst[ j ] = ( src[ j ][ i ] + src[ i ][ j ] ) * s;
+ dst[ k ] = ( src[ k ][ i ] + src[ i ][ k ] ) * s;
}
}