private IList <CurveLoop> GetTransformedCurveLoopsFromSimpleProfile(IFCSimpleProfile simpleSweptArea, Transform unscaledLcs, Transform scaledLcs)
{
IList <CurveLoop> loops = new List <CurveLoop>();
// It is legal for simpleSweptArea.Position to be null, for example for IfcArbitraryClosedProfileDef.
Transform unscaledSweptAreaPosition =
(simpleSweptArea.Position == null) ? unscaledLcs : unscaledLcs.Multiply(simpleSweptArea.Position);
Transform scaledSweptAreaPosition =
(simpleSweptArea.Position == null) ? scaledLcs : scaledLcs.Multiply(simpleSweptArea.Position);
CurveLoop currLoop = simpleSweptArea.OuterCurve;
if (currLoop == null || currLoop.Count() == 0)
{
Importer.TheLog.LogError(simpleSweptArea.Id, "No outer curve loop for profile, ignoring.", false);
return(null);
}
currLoop = IFCGeometryUtil.SplitUnboundCyclicCurves(currLoop);
loops.Add(IFCGeometryUtil.CreateTransformed(currLoop, Id, unscaledSweptAreaPosition, scaledSweptAreaPosition));
if (simpleSweptArea.InnerCurves != null)
{
foreach (CurveLoop innerCurveLoop in simpleSweptArea.InnerCurves)
{
loops.Add(IFCGeometryUtil.CreateTransformed(IFCGeometryUtil.SplitUnboundCyclicCurves(innerCurveLoop), Id, unscaledSweptAreaPosition, scaledSweptAreaPosition));
}
}
return(loops);
}
/// <summary>
/// Add curves to represent the plan view of the created object.
/// </summary>
/// <param name="curves">The list of curves, to be validated.</param>
/// <param name="id">The id of the object being created, for error logging.</param>
/// <returns>True if any curves were added to the plan view representation.</returns>
public bool AddPlanViewCurves(IList <Curve> curves, int id)
{
ViewShapeBuilder = null;
int numCurves = curves.Count;
if (numCurves > 0)
{
ViewShapeBuilder = new ViewShapeBuilder(DirectShapeTargetViewType.Plan);
IFCGeometryUtil.SplitUnboundCyclicCurves(curves);
// Ideally we'd form these curves into a CurveLoop and get the Plane of the CurveLoop. However, there is no requirement
// that the plan view curves form one contiguous loop.
foreach (Curve curve in curves)
{
if (ViewShapeBuilder.ValidateCurve(curve))
{
ViewShapeBuilder.AddCurve(curve);
}
else
{
// We will move the origin to Z=0 if necessary, since the VSB requires all curves to be in the Z=0 plane.
// This only works if the curves are in a plane parallel to the Z=0 plane.
// NOTE: We could instead project the curves to the Z=0 plane, which could have the effect of changing their geometry.
// Until we see such cases, we will take the easier route here.
try
{
// If the end points aren't equal in Z, then the curve isn't parallel to Z.
bool isBound = curve.IsBound;
XYZ startPoint = isBound ? curve.GetEndPoint(0) : curve.Evaluate(0, false);
XYZ endPoint = isBound ? curve.GetEndPoint(1) : startPoint;
if (!MathUtil.IsAlmostEqual(startPoint.Z, endPoint.Z))
{
throw new InvalidOperationException("Non-planar curve in footprint representation.");
}
// Lines won't have a non-zero BasisZ value, so don't bother computing.
if (!(curve is Line))
{
Transform coordinatePlane = curve.ComputeDerivatives(0, true);
if (coordinatePlane != null && coordinatePlane.BasisZ != null && !coordinatePlane.BasisZ.IsZeroLength())
{
XYZ normalizedZ = coordinatePlane.BasisZ.Normalize();
if (!MathUtil.IsAlmostEqual(Math.Abs(normalizedZ.Z), 1.0))
{
throw new InvalidOperationException("Non-planar curve in footprint representation.");
}
}
}
// We expect startPoint.Z to be non-zero, otherwise ValidateCurve would have accepted the curve in the first place.
Transform offsetTransform = Transform.CreateTranslation(-startPoint.Z * XYZ.BasisZ);
Curve projectedCurve = curve.CreateTransformed(offsetTransform);
// We may have missed a case above - for example, a curve whose end points have the same Z value, and whose normal at the
// start point is in +/-Z, but is regardless non-planar. ValidateCurve has a final chance to reject such curves here.
if (projectedCurve == null || !ViewShapeBuilder.ValidateCurve(projectedCurve))
{
throw new InvalidOperationException("Invalid curve in footprint representation.");
}
ViewShapeBuilder.AddCurve(projectedCurve);
continue;
}
catch
{
}
Importer.TheLog.LogError(id, "Invalid curve in FootPrint representation, ignoring.", false);
numCurves--;
}
}
if (numCurves == 0)
{
ViewShapeBuilder = null;
}
}
return(ViewShapeBuilder != null);
}