Basic Use of ApplyImpulse
- by nycynik
I am trying to apply a force to a bunch of b2_dynamicBodys, but it seems to only work for a random number of items and then stops with an error.
//create some items to move
bodyDef.type = b2Body.b2_dynamicBody;
for(var i = 0; i < 5; ++i) {
fixDef.shape = new b2PolygonShape;
fixDef.shape.SetAsBox(1,1);
fixDef.friction = 1;
fixDef.restitution = .1;
bodyDef.position.x = Math.random() * 10;
bodyDef.position.y = Math.random() * 10;
bodyDef.linearDamping=1;
bodyDef.angularDamping=.8;
itemsArray.push(world.CreateBody(bodyDef).CreateFixture(fixDef)); // store for later
}
then i try to apply a force later with:
angle = 20;
for (var xIdx=0; xIdx<itemArray.length; xIdx++) {
itemsArray[xIdx].GetBody().ApplyImpulse(new b2Vec2(50*Math.cos(angle*Math.PI/180),50*Math.sin(angle*Math.PI/180)););
}
the error I receive is
TypeError: 'undefined' is not an object (evaluating 'c.x')
Is there something wrong with saving the items for later use when I am creating them? Does anyone know what is causing this.
