function camera_follow(ENTITY* chrac)
{
 while(1) 
 { 
  camera.x=chrac.x-300*cos(chrac.pan);
  camera.y=chrac.y-300*sin(chrac.pan;
  camera.z=chrac.z+5;
  camera.pan=chrac.pan;
  wait(1);
 }
}