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- /* libsegl - Sebas Extended GL Library
- * Collection of Opengl/3D-Math helpers
- *
- * Copyright (c) 2008 by Sebastian Lohff, seba@seba-geek.de
- * http://www.seba-geek.de
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library 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
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
- */
-
- #include "emath.h"
-
- namespace segl {
-
- // Trigonometrische Funktionen
-
- float deg2rad(float deg) {
- return (deg/180.0f)*3.1415926535897932384626433f;
- }
-
- float rad2deg(float rad) {
- return (rad/3.1415926535897932384626433f)*180.0f;
- }
-
- float ssin(float c) {
- int t=(int)c;
- if(t!=c)
- return sin(deg2rad(c));
- t = t % 360;
- if(t<0)
- t = 360 + t;
- switch(t) {
- case 0:
- return 0.0f;
- case 90:
- return 1.0f;
- case 180:
- return 0.0f;
- case 270:
- return -1.0f;
- default:
- return sin(deg2rad(c));
- }
- }
-
- float scos(float c) {
- return ssin(c+90.0f);
- }
-
- } // namespace segl
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