/// <summary>
/// Processes IfcRepresentationContext attributes.
/// </summary>
/// <param name="ifcRepresentationContext">The IfcRepresentationContext handle.</param>
override protected void Process(IFCAnyHandle ifcRepresentationContext)
{
base.Process(ifcRepresentationContext);
Identifier = IFCImportHandleUtil.GetOptionalStringAttribute(ifcRepresentationContext, "ContextIdentifier", null);
Type = IFCImportHandleUtil.GetOptionalStringAttribute(ifcRepresentationContext, "ContextType", null);
if (IFCAnyHandleUtil.IsSubTypeOf(ifcRepresentationContext, IFCEntityType.IfcGeometricRepresentationContext))
{
bool found = false;
CoordinateSpaceDimension = IFCImportHandleUtil.GetRequiredIntegerAttribute(ifcRepresentationContext, "CoordinateSpaceDimension", out found);
if (!found)
{
CoordinateSpaceDimension = 3; // Don't throw, just set to default 3D.
}
Precision = IFCImportHandleUtil.GetOptionalScaledLengthAttribute(ifcRepresentationContext, "Precision", IFCImportFile.TheFile.Document.Application.VertexTolerance);
IFCAnyHandle worldCoordinateSystem = IFCImportHandleUtil.GetRequiredInstanceAttribute(ifcRepresentationContext, "WorldCoordinateSystem", false);
if (!IFCAnyHandleUtil.IsNullOrHasNoValue(worldCoordinateSystem))
{
WorldCoordinateSystem = IFCLocation.ProcessIFCAxis2Placement(worldCoordinateSystem);
}
else
{
WorldCoordinateSystem = Transform.Identity;
}
// For IfcGeometricRepresentationSubContext, it seems as if
try
{
IFCAnyHandle trueNorth = IFCImportHandleUtil.GetOptionalInstanceAttribute(ifcRepresentationContext, "TrueNorth");
if (!IFCAnyHandleUtil.IsNullOrHasNoValue(trueNorth))
{
TrueNorth = IFCPoint.ProcessNormalizedIFCDirection(trueNorth);
}
else
{
TrueNorth = XYZ.BasisZ;
}
}
catch
{
TrueNorth = XYZ.BasisZ;
}
if (IFCImportFile.TheFile.SchemaVersion >= IFCSchemaVersion.IFC2x2 && IFCAnyHandleUtil.IsSubTypeOf(ifcRepresentationContext, IFCEntityType.IfcGeometricRepresentationSubContext))
{
IFCAnyHandle parentContext = IFCImportHandleUtil.GetRequiredInstanceAttribute(ifcRepresentationContext, "ParentContext", true);
ParentContext = IFCRepresentationContext.ProcessIFCRepresentationContext(parentContext);
TargetScale = IFCImportHandleUtil.GetOptionalPositiveRatioAttribute(ifcRepresentationContext, "TargetScale", 1.0);
TargetView = IFCEnums.GetSafeEnumerationAttribute <IFCGeometricProjection>(ifcRepresentationContext, "TargetView",
IFCGeometricProjection.NotDefined);
UserDefinedTargetView = IFCImportHandleUtil.GetOptionalStringAttribute(ifcRepresentationContext, "UserDefinedTargetView", null);
}
}
}
/// <summary>
/// Processes IfcRepresentationContext attributes.
/// </summary>
/// <param name="ifcRepresentationContext">The IfcRepresentationContext handle.</param>
override protected void Process(IFCAnyHandle ifcRepresentationContext)
{
base.Process(ifcRepresentationContext);
Identifier = IFCImportHandleUtil.GetOptionalStringAttribute(ifcRepresentationContext, "ContextIdentifier", null);
Type = IFCImportHandleUtil.GetOptionalStringAttribute(ifcRepresentationContext, "ContextType", null);
if (IFCAnyHandleUtil.IsSubTypeOf(ifcRepresentationContext, IFCEntityType.IfcGeometricRepresentationContext))
{
bool found = false;
CoordinateSpaceDimension = IFCImportHandleUtil.GetRequiredIntegerAttribute(ifcRepresentationContext, "CoordinateSpaceDimension", out found);
if (!found)
{
CoordinateSpaceDimension = 3; // Don't throw, just set to default 3D.
}
Precision = IFCImportHandleUtil.GetOptionalScaledLengthAttribute(ifcRepresentationContext, "Precision", IFCImportFile.TheFile.Document.Application.VertexTolerance);
IFCAnyHandle worldCoordinateSystem = IFCImportHandleUtil.GetRequiredInstanceAttribute(ifcRepresentationContext, "WorldCoordinateSystem", false);
if (!IFCAnyHandleUtil.IsNullOrHasNoValue(worldCoordinateSystem))
{
WorldCoordinateSystem = IFCLocation.ProcessIFCAxis2Placement(worldCoordinateSystem);
}
else
{
WorldCoordinateSystem = Transform.Identity;
}
bool isSubContext = IFCImportFile.TheFile.SchemaVersionAtLeast(IFCSchemaVersion.IFC2x2) &&
IFCAnyHandleUtil.IsSubTypeOf(ifcRepresentationContext, IFCEntityType.IfcGeometricRepresentationSubContext);
if (isSubContext)
{
IFCAnyHandle parentContext = IFCImportHandleUtil.GetRequiredInstanceAttribute(ifcRepresentationContext, "ParentContext", true);
ParentContext = IFCRepresentationContext.ProcessIFCRepresentationContext(parentContext);
TrueNorth = ParentContext.TrueNorth;
}
else
{
// This used to fail for IfcGeometricRepresentationSubContext, because the TrueNorth attribute was derived from
// the IfcGeometricRepresentationContext, and the toolkit returned what seemed to be a valid handle that actually
// wasn't. The code has now been rewritten to avoid this issue, but we will keep the try/catch block in case we
// were also catching other serious issues.
try
{
// By default, True North points in the Y-Direction.
IFCAnyHandle trueNorth = IFCImportHandleUtil.GetOptionalInstanceAttribute(ifcRepresentationContext, "TrueNorth");
if (!IFCAnyHandleUtil.IsNullOrHasNoValue(trueNorth))
{
TrueNorth = IFCPoint.ProcessNormalizedIFCDirection(trueNorth);
}
else
{
TrueNorth = XYZ.BasisY;
}
}
catch
{
TrueNorth = XYZ.BasisY;
}
}
if (isSubContext)
{
TargetScale = IFCImportHandleUtil.GetOptionalPositiveRatioAttribute(ifcRepresentationContext, "TargetScale", 1.0);
TargetView = IFCEnums.GetSafeEnumerationAttribute <IFCGeometricProjection>(ifcRepresentationContext, "TargetView",
IFCGeometricProjection.NotDefined);
UserDefinedTargetView = IFCImportHandleUtil.GetOptionalStringAttribute(ifcRepresentationContext, "UserDefinedTargetView", null);
}
}
}
