/*
   Copyright (C) 2001-2006, William Joseph.
   All Rights Reserved.

   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
 */

#include "mathlib.h"

void line_construct_for_vec3( line_t *line, const vec3_t start, const vec3_t end ){
	VectorMid( start, end, line->origin );
	VectorSubtract( end, line->origin, line->extents );
}

int line_test_plane( const line_t* line, const vec4_t plane ){
	float fDist;

	// calc distance of origin from plane
	fDist = DotProduct( plane, line->origin ) + plane[3];

	// accept if origin is less than or equal to this distance
	if ( fabs( fDist ) < fabs( DotProduct( plane, line->extents ) ) ) {
		return 1;                                                     // partially inside
	}
	else if ( fDist < 0 ) {
		return 2;               // totally inside
	}
	return 0; // totally outside
}