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/*
ssystem 1.6
Copyright (C) 1997-1999 Raul Alonso <amil@las.es>
This program 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.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "ssystem.h"
static int oldmousex,oldmousey;
void Mouse(int button, int state, int x, int y)
{
if ((button==GLUT_LEFT_BUTTON) && (state==GLUT_DOWN)) {
oldmousex=x;
oldmousey=y;
}
}
/* Moves camera with the mouse */
void Motion(int x, int y)
{
static double xx,yy,zz;
if (!cmode) {
Rotation((x-oldmousex)/100.0,upx,upy,upz,&eyex,&eyey,&eyez);
xx=upy*eyez-upz*eyey;
yy=-upx*eyez+upz*eyex;
zz=upx*eyey-upy*eyex;
Rotation((y-oldmousey)/100.0,xx,yy,zz,&eyex,&eyey,&eyez);
}
oldmousex=x;
oldmousey=y;
}
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