Forums » Help » Using Box2D. How do I make player stop instantly when key is released?

I'm toying around with the Box2D demo.
There is a walking-on-ice feel to the way the player moves horizontally.
Applying no forces does not stop the player fast enough.

What is the Box2D approach to instantly stopping and entity?

Edit:

(Not sure if increasing floor friction is the right move, because although player should stop instantly, other entities, such as bullets, should not.)

Solution. The following can be used to walk at a constant rate, and stop instantly when the key is released:

if( ig.input.state('left') ) {
    this.body.SetLinearVelocity( new b2.Vec2(-5,0), this.body.GetPosition() );
} else if( ig.input.state('right') ) {
    this.body.SetLinearVelocity( new b2.Vec2(5,0), this.body.GetPosition() );
} else if( ig.input.released('left') || ig.input.released('right') ) {
    this.body.SetLinearVelocity( new b2.Vec2(0,0), this.body.GetPosition() );
}