Box2D Forums

Hello,

I think this question has been answered 100 times but I couldn't find a real answer,
especially because I call world.Step more than 1 time in Update()
because this http://gafferongames.com/game-physics/f ... -timestep/ says so.

I want to move my character that it only moves during I press the movement keys.
So, I thought about a simple procedure like


but this would also clear the force which was added through other sources.
And because I call step() more than one time in an update and the force gets cleared after each call, its only useful for the first call to step().

If I only apply/set the force/impulse/velocity but dont clear it, the player doesn't stop to move.

no one?

You could do a counter impulse, or increase linear damping in the character.

What do you mean with counter impulse?

And with damping you mean friction?
That doesn't help, because it only needs more force to move then.

I meant apply an impulse in the opposite direction the character is moving.

And damping I mean damping. There is a linear damping value you can specify in the body definition.

well, increasing the linear damping to 10.f helped, but it also changes the gravitational force and other forces :S

Hm, I guess you'll have to apply a counter impulse (probably just a horizontal counter impulse (leftwards or rightwards?)). You'll have to do something like:

That code may not work at all, but the idea is there.