/// <summary>
/// Creates a simple swept solid from a list of curve loops.
/// </summary>
/// <param name="exporterIFC">The exporter.</param>
/// <param name="profileName">The profile name.</param>
/// <param name="profileCurveLoops">The profile curve loops.</param>
/// <param name="normal">The normal of the plane that the path lies on.</param>
/// <param name="directrix">The path curve.</param>
/// <returns>The swept solid handle.</returns>
public static IFCAnyHandle CreateSimpleSweptSolid(ExporterIFC exporterIFC, string profileName, IList <CurveLoop> profileCurveLoops,
XYZ normal, Curve directrix)
{
// see definition of IfcSurfaceCurveSweptAreaSolid from
// http://www.buildingsmart-tech.org/ifc/IFC2x4/rc4/html/schema/ifcgeometricmodelresource/lexical/ifcsurfacecurvesweptareasolid.htm
IFCAnyHandle simpleSweptSolidHnd = null;
if (profileCurveLoops.Count == 0)
{
return(simpleSweptSolidHnd);
}
IFCFile file = exporterIFC.GetFile();
XYZ startPoint = directrix.get_EndPoint(0);
XYZ profilePlaneNormal = null;
XYZ profilePlaneXDir = null;
XYZ profilePlaneYDir = null;
IFCAnyHandle curveHandle = null;
double startParam = 0, endParam = 1;
Plane scaledReferencePlane = null;
if (directrix is Line)
{
Line line = directrix as Line;
startParam = 0.0;
endParam = 1.0;
profilePlaneNormal = line.Direction;
profilePlaneYDir = normal;
profilePlaneXDir = profilePlaneNormal.CrossProduct(profilePlaneYDir);
XYZ linePlaneNormal = profilePlaneYDir;
XYZ linePlaneXDir = profilePlaneXDir;
XYZ linePlaneYDir = linePlaneNormal.CrossProduct(linePlaneXDir);
XYZ linePlaneOrig = startPoint;
scaledReferencePlane = GeometryUtil.CreateScaledPlane(exporterIFC, linePlaneXDir, linePlaneYDir, linePlaneOrig);
curveHandle = GeometryUtil.CreateLine(exporterIFC, line, scaledReferencePlane);
}
else if (directrix is Arc)
{
Arc arc = directrix as Arc;
// profilePlaneXDir is set relative to the startPoint of the directrix. This effectively resets the start parameter to 0.0, and end parameter = length of curve.
startParam = 0.0;
endParam = (MathUtil.PutInRange(arc.get_EndParameter(1), Math.PI, 2 * Math.PI) - MathUtil.PutInRange(arc.get_EndParameter(0), Math.PI, 2 * Math.PI)) * (180 / Math.PI);
profilePlaneNormal = directrix.ComputeDerivatives(0, true).BasisX;
profilePlaneXDir = (arc.Center - startPoint).Normalize();
profilePlaneYDir = profilePlaneNormal.CrossProduct(profilePlaneXDir).Normalize();
XYZ arcPlaneNormal = arc.Normal;
XYZ arcPlaneXDir = profilePlaneXDir;
XYZ arcPlaneYDir = arcPlaneNormal.CrossProduct(arcPlaneXDir);
XYZ arcPlaneOrig = startPoint;
scaledReferencePlane = GeometryUtil.CreateScaledPlane(exporterIFC, arcPlaneXDir, arcPlaneYDir, arcPlaneOrig);
curveHandle = GeometryUtil.CreateArc(exporterIFC, arc, scaledReferencePlane);
}
else
{
return(simpleSweptSolidHnd);
}
IFCAnyHandle referencePlaneAxisHandle = ExporterUtil.CreateAxis(file, scaledReferencePlane.Origin, scaledReferencePlane.Normal, scaledReferencePlane.XVec);
IFCAnyHandle referencePlaneHandle = IFCInstanceExporter.CreatePlane(file, referencePlaneAxisHandle);
Plane profilePlane = new Plane(profilePlaneXDir, profilePlaneYDir, startPoint);
IList <CurveLoop> curveLoops = null;
try
{
// Check that curve loops are valid.
curveLoops = ExporterIFCUtils.ValidateCurveLoops(profileCurveLoops, profilePlaneNormal);
}
catch (Exception)
{
return(null);
}
if (curveLoops == null || curveLoops.Count == 0)
{
return(simpleSweptSolidHnd);
}
IFCAnyHandle sweptArea = ExtrusionExporter.CreateSweptArea(exporterIFC, profileName, curveLoops, profilePlane, profilePlaneNormal);
if (IFCAnyHandleUtil.IsNullOrHasNoValue(sweptArea))
{
return(simpleSweptSolidHnd);
}
profilePlane = GeometryUtil.GetScaledPlane(exporterIFC, profilePlane);
IFCAnyHandle solidAxis = ExporterUtil.CreateAxis(file, profilePlane.Origin, profilePlane.Normal, profilePlane.XVec);
simpleSweptSolidHnd = IFCInstanceExporter.CreateSurfaceCurveSweptAreaSolid(file, sweptArea, solidAxis, curveHandle, startParam,
endParam, referencePlaneHandle);
return(simpleSweptSolidHnd);
}