Game Development Reference
In-Depth Information
fixtureDef.restitution=0.4;
fixtureDef.friction=0.5;
var theIdol:b2Body=world.CreateBody(bodyDef);
theIdol.CreateFixture(fixtureDef);
var bW:Number=5/worldScale;
var bH:Number=20/worldScale;
var boxPos:b2Vec2=new b2Vec2(0,10/worldScale);
var boxAngle:Number=-Math.PI/4;
polygonShape.SetAsOrientedBox(bW,bH,boxPos,boxAngle);
fixtureDef.shape=polygonShape;
theIdol.CreateFixture(fixtureDef);
boxAngle=Math.PI/4;
polygonShape.SetAsOrientedBox(bW,bH,boxPos,boxAngle);
fixtureDef.shape=polygonShape;
theIdol.CreateFixture(fixtureDef);
var vertices:Vector.<b2Vec2>=new Vector.<b2Vec2>();
vertices.push(new b2Vec2(-15/worldScale,
-25/worldScale));
vertices.push(new b2Vec2(0,-40/worldScale));
vertices.push(new b2Vec2(15/worldScale,
-25/worldScale));
vertices.push(new b2Vec2(0,-10/worldScale));
polygonShape.SetAsVector(vertices,4);
fixtureDef.shape=polygonShape;
theIdol.CreateFixture(fixtureDef);
}
5.
As a new sprite is created every time a body is added to the world, we need
to remove it once the body is destroyed, so we are calling a
removeChild
method in the
queryCallback
function before we destroy the body.
private function queryCallback(fixture:b2Fixture):Boolean {
var touchedBody:b2Body=fixture.GetBody();
var userData:String=touchedBody.GetUserData().name;
if (userData=="breakable") {
removeChild(touchedBody.GetUserData().asset);
world.DestroyBody(touchedBody);
}
return false;
}
Now we have all sprites added and removed conveniently. The last task is
to move and rotate them at every frame to follow the bodies they have been
linked to.
