/// <summary> /// Creates a fixture and attach it to this body. /// @warning This function is locked during callbacks. /// </summary> /// <param name="def">The fixture definition.</param> public Fixture CreateFixture(FixtureDef def) { if (_world._lock == true) { return(null); } BroadPhase broadPhase = _world._broadPhase; Fixture fixture = new Fixture(); fixture.Create(broadPhase, this, _xf, def); fixture._next = _fixtureList; _fixtureList = fixture; ++_fixtureCount; fixture._body = this; return(fixture); }
public void Create(BroadPhase broadPhase, Body body, Transform xf, FixtureDef def) { UserData = def.UserData; Friction = def.Friction; Restitution = def.Restitution; Density = def.Density; _body = body; _next = null; Filter = def.Filter; _isSensor = def.IsSensor; _type = def.Type; // Allocate and initialize the child shape. switch (_type) { case ShapeType.CircleShape: { CircleShape circle = new CircleShape(); CircleDef circleDef = (CircleDef)def; circle._position = circleDef.LocalPosition; circle._radius = circleDef.Radius; _shape = circle; } break; case ShapeType.PolygonShape: { PolygonShape polygon = new PolygonShape(); PolygonDef polygonDef = (PolygonDef)def; polygon.Set(polygonDef.Vertices, polygonDef.VertexCount); _shape = polygon; } break; case ShapeType.EdgeShape: { EdgeShape edge = new EdgeShape(); EdgeDef edgeDef = (EdgeDef)def; edge.Set(edgeDef.Vertex1, edgeDef.Vertex2); _shape = edge; } break; default: Box2DNetDebug.Assert(false); break; } // Create proxy in the broad-phase. AABB aabb; _shape.ComputeAABB(out aabb, xf); bool inRange = broadPhase.InRange(aabb); // You are creating a shape outside the world box. Box2DNetDebug.Assert(inRange); if (inRange) { _proxyId = broadPhase.CreateProxy(aabb, this); } else { _proxyId = PairManager.NullProxy; } }