if (key_a-key_d==0)
{
 leftright=0;
}
move = 7*(key_w-key_s)*time_step; //moves the player with [w] [a] [s] [d]
leftright+=key_a*(0.1*time_step);
leftright-=key_d*(0.1*time_step);
if (leftright>1.4)
{
 leftright=1.4;
}
if (leftright<-1.4)
{
 leftright=-1.4;
}
camera.pan += (3*time_step)*leftright;
my.pan=camera.pan;
camera.x = my.x-200*cos(my.pan);
camera.y = my.y-200*sin(my.pan);
camera.z = my.z+100;
camera.tilt += mouse_force.y;
if(camera.tilt < -50) {camera.tilt = -50;}
if(camera.tilt > 20) {camera.tilt = 20;}