/// <summary>
/// Appends a new root local placement and changes the transformation graph.
/// </summary>
/// <param name="s">The model store</param>
/// <returns>Added placement</returns>
public IIfcLocalPlacement NewRootIfcLocalPlacement(IModel s)
{
// Compute delta alignment
var virtualParent = SourceReferenceAxis.TransformAxisTo(TargetReferenceAxis);
// Generate new root placement
switch (s.SchemaVersion)
{
case Xbim.Common.Step21.XbimSchemaVersion.Ifc2X3:
return(s.NewIfc2x3ObjectPlacementTo(virtualParent));
case Xbim.Common.Step21.XbimSchemaVersion.Ifc4:
case Xbim.Common.Step21.XbimSchemaVersion.Ifc4x1:
return(s.NewIfc4ObjectPlacementTo(virtualParent));
default:
throw new ArgumentException($"Unhandled schema version {s.SchemaVersion}");
}
}
/// <summary>
/// Changes an existing local placement to be aligned to target axis.
/// </summary>
/// <param name="placement">A placement to be aligned</param>
/// <param name="transform">The associated transform in model units</param>
/// <returns>The given placement with (possible) additional axis components</returns>
public IIfcLocalPlacement ChangeIfcLocalPlacement(IIfcLocalPlacement placement, XbimMatrix3D transform)
{
// Compute delta alignment
var virtualParent = SourceReferenceAxis.TransformAxisTo(TargetReferenceAxis);
// Multiply out with selected placement
var unitsPerMeter = placement.Model.ModelFactors.OneMeter;
var finalAlignment = new IfcAlignReferenceAxis(transform * virtualParent.To3D(unitsPerMeter), unitsPerMeter);
switch (placement.Model.SchemaVersion)
{
case Xbim.Common.Step21.XbimSchemaVersion.Ifc2X3:
return((placement as Xbim.Ifc2x3.GeometricConstraintResource.IfcLocalPlacement).ChangeIfc2x3ObjectPlacementTo(finalAlignment, true));
case Xbim.Common.Step21.XbimSchemaVersion.Ifc4:
case Xbim.Common.Step21.XbimSchemaVersion.Ifc4x1:
return((placement as Xbim.Ifc4.GeometricConstraintResource.IfcLocalPlacement).ChangeIfc4ObjectPlacementTo(finalAlignment, true));
default:
throw new ArgumentException($"Unhandled schema version {placement.Model.SchemaVersion}");
}
}