Algodoo

theres no way to track the position of an object, so just make it mouse-pointed for now(NOT ballpointed).

first, you need to calculate the angle between [gunx+anything positive, guny], [gun], and [app.mousepos]. then making a comparation to the angle gun is pointing at(AFAIK, math.atan2(e.normal) should do the trick, but... theres no atan2 in phun , so you should emulate it by using 2*math.atan(e.normal(1)/(e.normal(0)+1))

then. the gun's motor(or just a turning mechanism) needs to be changed in according to that, in an attempt to make the ground-gun-mouse angle minus the angle gun is pointing as closest to zero as possible

i suck in trigonometry, so.... good luck

ok thanks