1 /* Copyright (C) 1992-1998 The Geometry Center 2 * Copyright (C) 1998-2000 Stuart Levy, Tamara Munzner, Mark Phillips 3 * 4 * This file is part of Geomview. 5 * 6 * Geomview is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU Lesser General Public License as published 8 * by the Free Software Foundation; either version 2, or (at your option) 9 * any later version. 10 * 11 * Geomview is distributed in the hope that it will be useful, but 12 * WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with Geomview; see the file COPYING. If not, write 18 * to the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, 19 * USA, or visit http://www.gnu.org. 20 */ 21 22 23 /* Authors: Charlie Gunn, Pat Hanrahan, Stuart Levy, Tamara Munzner, Mark Phillips */ 24 25 #ifndef _GV_TOLERANVE_H_ 26 # define _GV_TOLERANVE_H_ 27 28 /* FLT_EPSILON: 1.19209290e-7F */ 29 30 # define TOLERANCE 1e-6 31 32 # define fneg(a) ((a)<-TOLERANCE) 33 # define fpos(a) ((a)> TOLERANCE) 34 # define fzero(a) (((a)<TOLERANCE)&&((a)>-TOLERANCE)) 35 # define fz(a) fzero(a) 36 # define fnz(a) (!fzero(a)) 37 38 #endif 39