2 Copyright (C) 2001-2006, William Joseph.
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
24 void line_construct_for_vec3( line_t *line, const vec3_t start, const vec3_t end ){
25 VectorMid( start, end, line->origin );
26 VectorSubtract( end, line->origin, line->extents );
29 int line_test_plane( const line_t* line, const vec4_t plane ){
32 // calc distance of origin from plane
33 fDist = DotProduct( plane, line->origin ) + plane[3];
35 // accept if origin is less than or equal to this distance
36 if ( fabs( fDist ) < fabs( DotProduct( plane, line->extents ) ) ) {
37 return 1; // partially inside
39 else if ( fDist < 0 ) {
40 return 2; // totally inside
42 return 0; // totally outside