|
public abstract ComputeAABB ( |
||
| aabb | Returns the axis aligned box. | |
| xf | Box2DX.Common.Transform | The world Transform of the shape. |
| return | void | |
// We need separation create/destroy functions from the constructor/destructor because
// the destructor cannot access the allocator or broad-phase (no destructor arguments allowed by C++).
public void Create(BroadPhase broadPhase, Body body, Transform xf, FixtureDef def)
{
UserData = def.UserData;
Friction = def.Friction;
Restitution = def.Restitution;
Body = body;
_next = null;
Filter = def.Filter;
IsSensor = def.IsSensor;
Shape = def.Shape.Clone();
Shape.ComputeMass(out _massData, def.Density);
// Create proxy in the broad-phase.
Shape.ComputeAABB(out Aabb, ref xf);
ProxyId = broadPhase.CreateProxy(Aabb, this);
}
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;
_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:
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;
}
}
