public static ChainElement CreateFor(PayloadChain payloadChain, int index, DynamicEntityWorld world, Body body)
{
var el = new ChainElement(payloadChain.Name + "_" + index);
el._payloadChain = payloadChain;
el._index = index;
el.World = world;
el.Body = body;
return el;
}
public static ChainElement CreateFor(PayloadChain payloadChain, int index, DynamicEntityWorld world, Body body)
{
var el = new ChainElement(payloadChain.Name + "_" + index);
el._payloadChain = payloadChain;
el._index = index;
el.World = world;
el.Body = body;
return(el);
}
public static PayloadChain Connect(SpaceShip spaceShip, Payload payload, Vector2 payloadTarget)
{
var dynamicWorld = (DynamicEntityWorld)spaceShip.World;
var world = dynamicWorld.PhysicsWorld;
AABB spaceShipSize;
spaceShip.Body.FixtureList.First().GetAABB(out spaceShipSize, 0);
AABB payloadSize;
payload.Body.FixtureList.First().GetAABB(out payloadSize, 0);
var chainSize = new Vector2(1.0f);
var chainSizeSingle = Math.Max(chainSize.X, chainSize.Y);
var start = new Vector2(spaceShip.Position.X - spaceShipSize.Extents.Y, spaceShip.Position.Y);
var length = payloadTarget.Length();
var targetVector = payloadTarget / length;
var chainVector = targetVector * chainSizeSingle;
start += chainVector;
var chainCount = (int)Math.Ceiling(length / chainSizeSingle);
var lastBody = spaceShip.Body;
var chain = new PayloadChain(spaceShip.Name + "_Chain");
var elements = new List <ChainElement>();
for (var i = 0; i < chainCount; i++)
{
var chainBody = BodyFactory.CreateBody(world, start + i * chainVector);
chainBody.BodyType = BodyType.Dynamic;
var chainFixture = FixtureFactory.AttachRectangle(chainSize.X, chainSize.Y, 0.1f, Vector2.Zero, chainBody);
chainFixture.CollidesWith = Category.Cat2;
JointFactory.CreateRevoluteJoint(world, lastBody, chainBody, -chainVector / 2.0f);
lastBody = chainBody;
elements.Add(ChainElement.CreateFor(chain, elements.Count, dynamicWorld, chainBody));
}
payload.Position = new Vector3(start + chainCount * chainVector + targetVector * 2.5f, 0.0f);
JointFactory.CreateRevoluteJoint(world, lastBody, payload.Body, new Vector2(0.0f, -2.5f));
var ropeJoin = new RopeJoint(spaceShip.Body, payload.Body, new Vector2(0.0f, 3.0f), new Vector2(0.0f, -2.5f));
ropeJoin.CollideConnected = true;
world.AddJoint(ropeJoin);
return(chain);
}
