/// <summary>
/// Return true if contact calculations should be performed between these two shapes.
/// If you implement your own collision filter you may want to build from this implementation.
/// @warning for performance reasons this is only called when the AABBs begin to overlap.
/// </summary>
public virtual bool ShouldCollide(Fixture fixtureA, Fixture fixtureB)
{
FilterData filterA = fixtureA.Filter;
FilterData filterB = fixtureB.Filter;
if (filterA.GroupIndex == filterB.GroupIndex && filterA.GroupIndex != 0)
{
return(filterA.GroupIndex > 0);
}
bool collide = (filterA.MaskBits & filterB.CategoryBits) != 0 && (filterA.CategoryBits & filterB.MaskBits) != 0;
return(collide);
}
/// <summary>
/// Return true if contact calculations should be performed between these two shapes.
/// If you implement your own collision filter you may want to build from this implementation.
/// @warning for performance reasons this is only called when the AABBs begin to overlap.
/// </summary>
public virtual bool ShouldCollide(Shape shape1, Shape shape2)
{
FilterData filter1 = shape1.FilterData;
FilterData filter2 = shape2.FilterData;
if (filter1.GroupIndex == filter2.GroupIndex && filter1.GroupIndex != 0)
{
return(filter1.GroupIndex > 0);
}
bool collide = (filter1.MaskBits & filter2.CategoryBits) != 0 && (filter1.CategoryBits & filter2.MaskBits) != 0;
return(collide);
}
public virtual bool ShouldCollide(Shape shape1, Shape shape2)
{
FilterData filterData = shape1.FilterData;
FilterData filterData2 = shape2.FilterData;
bool result;
if (filterData.GroupIndex == filterData2.GroupIndex && filterData.GroupIndex != 0)
{
result = (filterData.GroupIndex > 0);
}
else
{
bool flag = (filterData.MaskBits & filterData2.CategoryBits) != 0 && (filterData.CategoryBits & filterData2.MaskBits) != 0;
result = flag;
}
return(result);
}
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;
}
}
