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;
}
public void LoadContent()
{
_spriteBatch = new SpriteBatch(_graphics);
_world = new DynamicEntityWorld(_game.Services);
var pp = _graphics.PresentationParameters;
_debugView = new DebugViewXNA(_world.PhysicsWorld);
_debugView.LoadContent(_graphics, _content);
_camera = new DefaultCamera(null, new Viewport(0, 0, pp.BackBufferWidth, pp.BackBufferHeight));
_cameraNode = _world.Scene.Root.CreateChild("Camera");
_cameraNode.Attach(_camera);
// Create the tile map.
var terrainSize = new Vector2(4096.0f, 2048.0f);
_terrain = new Terrain(terrainSize, 128.0f, 7)
{
DebugEnabled = false,
Position = new Vector3(50.0f, -terrainSize.Y / 2.0f, 0.0f),
TextureName = @"Textures\SpaceRock"
};
_world.Add(_terrain);
GenerateTunnels(new Vector2(50.0f, 0));
// Create the circle brush.
_circleBrush = new CircleBrush(2.5f);
_circleBrushNode = _world.Scene.CreateSceneNode();
_circleBrushNode.Attach(new CircleRenderable(2.5f, 64)
{
Color = Vector3.One
});
// Dust cloud
_dustCloud = _world.Scene.CreateSceneNode("DustCloud");
_dustCloud.Position = new Vector3(0.0f, 0.0f, -1.0f);
_dustCloud.Attach(new DustCloud());
_world.Scene.Root.AddChild(_dustCloud);
// Player
_playerEntity = new SpaceShip();
_playerEntity.Attach(new PlayerController());
_playerEntity.Orientation = Quaternion.CreateFromAxisAngle(Vector3.UnitZ, MathHelper.ToRadians(90.0f));
_world.Add(_playerEntity);
_payloadEntity = new Payload();
_payloadEntity.Orientation = Quaternion.CreateFromAxisAngle(Vector3.UnitZ, MathHelper.ToRadians(90.0f));
_world.Add(_payloadEntity);
_payloadChain = PayloadChain.Connect(_playerEntity, _payloadEntity, Vector2.UnitX * -20.0f);
}