/// <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)
{
Box2DxDebug.Assert(world.Lock == false);
if (world.Lock)
{
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);
}
/// <summary>
/// Creates the broad phase
/// </summary>
/// <param name="broadPhase">The broad phase</param>
/// <param name="body">The body</param>
/// <param name="xf">The xf</param>
/// <param name="def">The def</param>
public void Create(BroadPhase broadPhase, Body body, XForm 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;
ShapeType = def.Type;
// Allocate and initialize the child shape.
switch (ShapeType)
{
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:
Box2DxDebug.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.
Box2DxDebug.Assert(inRange);
if (inRange)
{
ProxyId = broadPhase.CreateProxy(aabb, this);
}
else
{
ProxyId = PairManager.NullProxy;
}
}