//--------------------------------------------------------------------------------------------------
void _ComputeCoordinateSystem()
{
TopoDS_Shape ocShape;
if ((_TargetBodies.Count == 1) || _Options.HasFlag(Options.MultiBodyUseFirst))
{
// Single body, or Multishape using pivot of first shape
Body targetBody = _TargetBodies[0];
ocShape = targetBody.Shape?.GetTransformedBRep();
switch (_PivotPoint)
{
case PivotPoint.BodyPivot:
_CoordinateSystem = targetBody.GetCoordinateSystem();
break;
case PivotPoint.BoundingCenter:
_CoordinateSystem = targetBody.GetCoordinateSystem();
if (ocShape != null)
{
_CoordinateSystem.Location = ocShape.BoundingBox().Center();
}
break;
case PivotPoint.MassCenter:
_CoordinateSystem = targetBody.GetCoordinateSystem();
if (ocShape != null)
{
_CoordinateSystem.Location = ocShape.CenterOfMass();
}
break;
}
if (_Options.HasFlag(Options.WorldSpaceOrientation))
{
_CoordinateSystem = new Ax3(_CoordinateSystem.Location, Dir.DZ);
}
}
else
{
// Multiple shapes, use BBox center for all as pivot, and world space axis
Bnd_Box bndBox = new Bnd_Box();
foreach (var targetBody in _TargetBodies)
{
ocShape = targetBody.Shape?.GetTransformedBRep();
if (ocShape != null)
{
bndBox.Add(ocShape.BoundingBox());
}
}
_CoordinateSystem = Ax3.XOY;
_CoordinateSystem.Location = bndBox.Center();
}
}
//--------------------------------------------------------------------------------------------------
List <TopoDS_Shape> IShapeOperand.FindSubshape(SubshapeReference reference, Ax3?targetFrame)
{
if (Body == null)
{
return(null);
}
var shape = Shape;
if (shape == null)
{
return(null);
}
var shapeList = shape.FindSubshape(reference, Body.GetCoordinateSystem());
if (shapeList != null && targetFrame.HasValue)
{
var location = _GetCachedLocation(targetFrame.Value);
for (var i = 0; i < shapeList.Count; i++)
{
shapeList[i] = shapeList[i].Moved(location);
}
}
return(shapeList);
}
TopLoc_Location _GetCachedLocation(Ax3 targetFrame)
{
if (Body == null)
{
return(null);
}
var bodyFrame = Body.GetCoordinateSystem();
if (_CachedLocation.Item1 == bodyFrame &&
_CachedLocation.Item2 == targetFrame)
{
return(_CachedLocation.Item3);
}
var location = new TopLoc_Location(new Trsf(Body.GetCoordinateSystem(), targetFrame));
_CachedLocation = new Tuple <Ax3, Ax3, TopLoc_Location>(bodyFrame, targetFrame, location);
return(location);
}
//--------------------------------------------------------------------------------------------------
bool IShapeOperand.BindToPlane(Ax3 targetFrame, Entity boundTo, Pln?plane)
{
if (Body == null)
{
return(false);
}
var shape = Shape;
if (shape == null)
{
return(false);
}
if (plane.HasValue)
{
return(shape.BindToPlane(Body.GetCoordinateSystem(), boundTo, plane.Value.Transformed(new Trsf(Body.GetCoordinateSystem(), targetFrame))));
}
else
{
return(shape.BindToPlane(Body.GetCoordinateSystem(), boundTo, null));
}
}
