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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