/// <summary>
/// Processes IfcProject attributes.
/// </summary>
/// <param name="ifcProjectHandle">The IfcProject handle.</param>
protected override void Process(IFCAnyHandle ifcProjectHandle)
{
IFCAnyHandle unitsInContext = IFCImportHandleUtil.GetRequiredInstanceAttribute(ifcProjectHandle, "UnitsInContext", false);
if (!IFCAnyHandleUtil.IsNullOrHasNoValue(unitsInContext))
{
IList <IFCAnyHandle> units = IFCAnyHandleUtil.GetAggregateInstanceAttribute <List <IFCAnyHandle> >(unitsInContext, "Units");
if (units != null)
{
m_UnitsInContext = new HashSet <IFCUnit>();
foreach (IFCAnyHandle unit in units)
{
IFCUnit ifcUnit = IFCImportFile.TheFile.IFCUnits.ProcessIFCProjectUnit(unit);
if (!IFCUnit.IsNullOrInvalid(ifcUnit))
{
m_UnitsInContext.Add(ifcUnit);
}
}
}
else
{
Importer.TheLog.LogMissingRequiredAttributeError(unitsInContext, "Units", false);
}
}
// We need to process the units before we process the rest of the file, since we will scale values as we go along.
base.Process(ifcProjectHandle);
// process true north - take the first valid representation context that has a true north value.
HashSet <IFCAnyHandle> repContexts = IFCAnyHandleUtil.GetAggregateInstanceAttribute <HashSet <IFCAnyHandle> >(ifcProjectHandle, "RepresentationContexts");
if (repContexts != null)
{
foreach (IFCAnyHandle geomRepContextHandle in repContexts)
{
if (!IFCAnyHandleUtil.IsNullOrHasNoValue(geomRepContextHandle) &&
IFCAnyHandleUtil.IsSubTypeOf(geomRepContextHandle, IFCEntityType.IfcGeometricRepresentationContext))
{
IFCAnyHandle trueNorthHandle = IFCAnyHandleUtil.GetInstanceAttribute(geomRepContextHandle, "TrueNorth");
if (!IFCAnyHandleUtil.IsNullOrHasNoValue(trueNorthHandle))
{
List <double> trueNorthDir = IFCAnyHandleUtil.GetAggregateDoubleAttribute <List <double> >(trueNorthHandle, "DirectionRatios");
if (trueNorthDir != null && trueNorthDir.Count >= 2)
{
m_TrueNorthDirection = trueNorthDir;
break;
}
}
}
}
}
// Special read of IfcPresentationLayerAssignment if the INVERSE flag isn't properly set in the EXPRESS file.
if (IFCImportFile.TheFile.SchemaVersion >= IFCSchemaVersion.IFC2x2)
{
IFCPresentationLayerAssignment.ProcessAllLayerAssignments();
}
}
protected override void Process(IFCAnyHandle ifcCurve)
{
base.Process(ifcCurve);
KnotMultiplicities = IFCAnyHandleUtil.GetAggregateIntAttribute <List <int> >(ifcCurve, "KnotMultiplicities");
Knots = IFCAnyHandleUtil.GetAggregateDoubleAttribute <List <double> >(ifcCurve, "Knots");
if (KnotMultiplicities == null || Knots == null)
{
Importer.TheLog.LogError(ifcCurve.StepId, "Cannot find the KnotMultiplicities or Knots attribute of this IfcBSplineCurveWithKnots", true);
}
if (KnotMultiplicities.Count != Knots.Count)
{
Importer.TheLog.LogError(ifcCurve.StepId, "The number of knots and knot multiplicities are not the same", true);
}
IList <double> revitKnots = IFCGeometryUtil.ConvertIFCKnotsToRevitKnots(KnotMultiplicities, Knots);
Curve nurbsSpline = NurbSpline.CreateCurve(Degree, revitKnots, ControlPointsList);
SetCurve(nurbsSpline);
if (nurbsSpline == null)
{
Importer.TheLog.LogWarning(ifcCurve.StepId, "Cannot get the curve representation of this IfcCurve", false);
}
}
protected override void Process(IFCAnyHandle ifcMaterialLayerWithOffsets)
{
base.Process(ifcMaterialLayerWithOffsets);
OffsetValues = IFCAnyHandleUtil.GetAggregateDoubleAttribute <List <double> >(ifcMaterialLayerWithOffsets, "OffsetValues");
OffsetDirection = (IFCLayerSetDirection)Enum.Parse(typeof(IFCLayerSetDirection), IFCAnyHandleUtil.GetEnumerationAttribute(ifcMaterialLayerWithOffsets, "OffsetDirection"));
}
private static XYZ ProcessIFCDirectionBase(IFCAnyHandle direction, bool normalize, bool reportAndThrowOnError)
{
if (IFCAnyHandleUtil.IsNullOrHasNoValue(direction))
{
Importer.TheLog.LogNullError(IFCEntityType.IfcDirection);
return(null);
}
if (!IFCAnyHandleUtil.IsValidSubTypeOf(direction, IFCEntityType.IfcDirection))
{
Importer.TheLog.LogUnexpectedTypeError(direction, IFCEntityType.IfcDirection, false);
return(null);
}
XYZ xyz = null;
int stepId = direction.StepId;
if (normalize)
{
if (IFCImportFile.TheFile.NormalizedXYZMap.TryGetValue(stepId, out xyz))
{
return(xyz);
}
}
else
{
if (IFCImportFile.TheFile.XYZMap.TryGetValue(stepId, out xyz))
{
return(xyz);
}
}
List <double> directionRatios = IFCAnyHandleUtil.GetAggregateDoubleAttribute <List <double> >(direction, "DirectionRatios");
xyz = ListToXYZ(directionRatios);
XYZ normalizedXYZ = null;
if (xyz != null)
{
if (normalize)
{
normalizedXYZ = xyz.Normalize();
if (normalizedXYZ.IsZeroLength())
{
if (reportAndThrowOnError)
{
Importer.TheLog.LogError(stepId, "Local transform contains 0 length vectors.", true);
}
else
{
return(XYZ.Zero);
}
}
IFCImportFile.TheFile.NormalizedXYZMap[direction.StepId] = normalizedXYZ;
}
AddToCaches(stepId, IFCEntityType.IfcDirection, xyz);
}
return(normalize ? normalizedXYZ : xyz);
}
protected override void Process(IFCAnyHandle ifcSurface)
{
base.Process(ifcSurface);
UMultiplicities = IFCAnyHandleUtil.GetAggregateIntAttribute <List <int> >(ifcSurface, "UMultiplicities");
VMultiplicities = IFCAnyHandleUtil.GetAggregateIntAttribute <List <int> >(ifcSurface, "VMultiplicities");
UKnots = IFCAnyHandleUtil.GetAggregateDoubleAttribute <List <double> >(ifcSurface, "UKnots");
VKnots = IFCAnyHandleUtil.GetAggregateDoubleAttribute <List <double> >(ifcSurface, "VKnots");
}
private static XYZ ProcessIFCDirectionBase(IFCAnyHandle direction, bool normalize)
{
if (IFCAnyHandleUtil.IsNullOrHasNoValue(direction))
{
IFCImportFile.TheLog.LogNullError(IFCEntityType.IfcDirection);
return(null);
}
if (!IFCAnyHandleUtil.IsSubTypeOf(direction, IFCEntityType.IfcDirection))
{
IFCImportFile.TheLog.LogUnexpectedTypeError(direction, IFCEntityType.IfcDirection, false);
return(null);
}
XYZ xyz = null;
int stepId = direction.StepId;
if (normalize)
{
if (IFCImportFile.TheFile.NormalizedXYZMap.TryGetValue(stepId, out xyz))
{
return(xyz);
}
}
else
{
if (IFCImportFile.TheFile.XYZMap.TryGetValue(stepId, out xyz))
{
return(xyz);
}
}
List <double> directionRatios = IFCAnyHandleUtil.GetAggregateDoubleAttribute <List <double> >(direction, "DirectionRatios");
xyz = ListToXYZ(directionRatios);
XYZ normalizedXYZ = null;
if (xyz != null)
{
AddToCaches(stepId, IFCEntityType.IfcDirection, xyz);
if (normalize)
{
normalizedXYZ = xyz.Normalize();
IFCImportFile.TheFile.NormalizedXYZMap[direction.StepId] = normalizedXYZ;
}
}
return(normalize ? normalizedXYZ : xyz);
}
protected override void Process(IFCAnyHandle ifcVirtualGridIntersection)
{
base.Process(ifcVirtualGridIntersection);
IList <IFCAnyHandle> intersectingAxes = IFCAnyHandleUtil.GetAggregateInstanceAttribute <List <IFCAnyHandle> >(ifcVirtualGridIntersection, "IntersectingAxes");
if (intersectingAxes == null ||
intersectingAxes.Count != 2 ||
IFCAnyHandleUtil.IsNullOrHasNoValue(intersectingAxes[0]) ||
IFCAnyHandleUtil.IsNullOrHasNoValue(intersectingAxes[1]))
{
Importer.TheLog.LogError(ifcVirtualGridIntersection.StepId, "Missing or invalid intersecting axes.", false);
return;
}
IFCGridAxis firstAxis = IFCGridAxis.ProcessIFCGridAxis(intersectingAxes[0]);
if (firstAxis == null)
{
return;
}
IFCGridAxis secondAxis = IFCGridAxis.ProcessIFCGridAxis(intersectingAxes[1]);
if (secondAxis == null)
{
return;
}
OffsetDistances = IFCAnyHandleUtil.GetAggregateDoubleAttribute <List <double> >(ifcVirtualGridIntersection, "OffsetDistances");
double[] offsetDistances = new double[3];
int offsetDistanceCount = (OffsetDistances != null) ? OffsetDistances.Count : 0;
for (int ii = 0; ii < 3; ii++)
{
offsetDistances[ii] = (offsetDistanceCount > ii) ? OffsetDistances[ii] : 0;
}
Curve firstCurve = firstAxis.GetAxisCurveForGridPlacement();
if (firstCurve == null)
{
return;
}
Curve secondCurve = secondAxis.GetAxisCurveForGridPlacement();
if (secondCurve == null)
{
return;
}
// We need to figure out the reference vector to do the offset, but we can't get
// the reference vector without getting the tangent at the intersection point.
// We will use a heuristic in GetReferenceVector to guess based on the curve types.
XYZ referenceVector = GetReferenceVector(firstCurve);
Curve firstOffsetCurve = (!MathUtil.IsAlmostZero(offsetDistances[0])) ?
firstCurve.CreateOffset(offsetDistances[0], referenceVector) : firstCurve;
Curve secondOffsetCurve = (!MathUtil.IsAlmostZero(offsetDistances[1])) ?
secondCurve.CreateOffset(offsetDistances[1], referenceVector) : secondCurve;
IntersectionResultArray resultArray;
SetComparisonResult result = firstOffsetCurve.Intersect(secondOffsetCurve, out resultArray);
if (result != SetComparisonResult.Overlap || resultArray == null || resultArray.Size == 0)
{
return;
}
IntersectionResult intersectionPoint = resultArray.get_Item(0);
XYZ origin = intersectionPoint.XYZPoint + offsetDistances[2] * referenceVector;
Transform derivatives = firstCurve.ComputeDerivatives(intersectionPoint.UVPoint.U, false);
LocalCoordinateSystem = Transform.CreateTranslation(origin);
LocalCoordinateSystem.BasisX = derivatives.BasisX;
LocalCoordinateSystem.BasisY = referenceVector.CrossProduct(derivatives.BasisX);
LocalCoordinateSystem.BasisZ = referenceVector;
}
protected override void Process(IFCAnyHandle ifcMaterialProfileWithOffsets)
{
base.Process(ifcMaterialProfileWithOffsets);
OffsetValues = IFCAnyHandleUtil.GetAggregateDoubleAttribute <List <double> >(ifcMaterialProfileWithOffsets, "OffsetValues");
}
