Algodoo

you need to get the angle between 2 points (mousepos, pos) and compare it with the normal-only angle. you sould know how to do the normal only angle, but, it can be simplified if you are only using e. normal, to:

math.atan(e.normal(1) / (e.normal(0) + 1)) * 2

because the length of the e.normal vector is always 1. for vectors with variable lengths you need to use the other one.

hovewer, ive not managed to think of a math formula to measure the angle betweeen those 2 points.

Another thing you should be aware of is that phun measures angles in radians, so, you might need radians and not degrees to do it

Aha, but the problme is that the bullets allways go to the right.. where the deg are possitive.. I think I have to add 180 or smth like that

for bullet speed you can use e.normal - no complicated stuff here

Okay.. but the problem is this.. when the gun is aimed to the left... the gun doesn't work... the speed is allways possitive... never negative... but Can I solve this by e.normal -300 for example??

actually, e.normal returns the vector of the collision detection in two vectors.You can't go wrong with it, because the distance between the position and the position + the normal is always equal to 1 meter.

if you're trying ro get the bullet at a constant 300 m/s rate, it would be "e,normal * 300"(notice the multiplication