function simple_car(){
ENTITY* car = ent_create("car.mdl",vector(100,-200,40),NULL);
pXent_settype(car,PH_RIGID,PH_BOX);
ENTITY* FLwheel = ent_create("wheel.mdl",vector(168,-170,17),NULL);
ENTITY* FRwheel = ent_create("wheel.mdl",vector(168,-230,17),NULL);
ENTITY* BLwheel = ent_create("wheel.mdl",vector(39,-170,17),NULL);
ENTITY* BRwheel = ent_create("wheel.mdl",vector(39,-230,17),NULL);
pXcon_add ( PH_WHEEL, FLwheel, car, 0 );
pXcon_add ( PH_WHEEL, FRwheel, car, 0 );
pXcon_add ( PH_WHEEL, BLwheel, car, 0 );
pXcon_add ( PH_WHEEL, BRwheel, car, 0 );//drive the car while(1) {
pXcon_setwheel (FLwheel,-5,0,0);
pXcon_setwheel (FRwheel,-5,0,0); // steer to the right
pXcon_setwheel (BLwheel,0,500,0); pXcon_setwheel (BRwheel,0,500,0);
wait(1); }}