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);
}
loops.Add(IFCGeometryUtil.CreateTransformed(currLoop, Id, unscaledSweptAreaPosition, scaledSweptAreaPosition));
if (simpleSweptArea.InnerCurves != null)
{
foreach (CurveLoop innerCurveLoop in simpleSweptArea.InnerCurves)
{
loops.Add(IFCGeometryUtil.CreateTransformed(innerCurveLoop, Id, unscaledSweptAreaPosition, scaledSweptAreaPosition));
}
}
return(loops);
}
/// <summary>
/// Return geometry for a particular representation item.
/// </summary>
/// <param name="shapeEditScope">The geometry creation scope.</param>
/// <param name="unscaledLcs">Local coordinate system for the geometry, without scale.</param>
/// <param name="scaledLcs">Local coordinate system for the geometry, including scale, potentially non-uniform.</param>
/// <param name="guid">The guid of an element for which represntation is being created.</param>
/// <returns>Zero or more created geometries.</returns>
protected override IList <GeometryObject> CreateGeometryInternal(
IFCImportShapeEditScope shapeEditScope, Transform unscaledLcs, Transform scaledLcs, string guid)
{
Transform unscaledSweptDiskPosition = (unscaledLcs == null) ? Transform.Identity : unscaledLcs;
Transform scaledSweptDiskPosition = (scaledLcs == null) ? Transform.Identity : scaledLcs;
CurveLoop trimmedDirectrix = IFCGeometryUtil.TrimCurveLoop(Id, Directrix, StartParameter, EndParameter);
if (trimmedDirectrix == null)
{
return(null);
}
CurveLoop trimmedDirectrixInWCS = IFCGeometryUtil.CreateTransformed(trimmedDirectrix, Id, unscaledSweptDiskPosition, scaledSweptDiskPosition);
// Create the disk.
Curve firstCurve = null;
foreach (Curve curve in trimmedDirectrixInWCS)
{
firstCurve = curve;
break;
}
double startParam = 0.0;
IList <CurveLoop> profileCurveLoops = CreateProfileCurveLoopsForDirectrix(firstCurve, out startParam);
if (profileCurveLoops == null)
{
return(null);
}
SolidOptions solidOptions = new SolidOptions(GetMaterialElementId(shapeEditScope), shapeEditScope.GraphicsStyleId);
IList <GeometryObject> myObjs = new List <GeometryObject>();
try
{
Solid sweptDiskSolid = GeometryCreationUtilities.CreateSweptGeometry(trimmedDirectrixInWCS, 0, startParam, profileCurveLoops,
solidOptions);
if (sweptDiskSolid != null)
{
myObjs.Add(sweptDiskSolid);
}
}
catch (Exception ex)
{
// If we can't create a solid, we will attempt to split the Solid into valid pieces (that will likely have some overlap).
if (ex.Message.Contains("self-intersections"))
{
Importer.TheLog.LogWarning(Id, "The IfcSweptDiskSolid definition does not define a valid solid, likely due to self-intersections or other such problems; the profile probably extends too far toward the inner curvature of the sweep path. Creating the minimum number of solids possible to represent the geometry.", false);
myObjs = SplitSweptDiskIntoValidPieces(trimmedDirectrixInWCS, profileCurveLoops, solidOptions);
}
else
{
throw ex;
}
}
return(myObjs);
}
/// <summary>
/// Create geometry for an IfcHalfSpaceSolid.
/// </summary>
/// <param name="shapeEditScope">The shape edit scope.</param>
/// <param name="lcs">Local coordinate system for the geometry, without scale.</param>
/// <param name="scaledLcs">Local coordinate system for the geometry, including scale, potentially non-uniform.</param>
/// <param name="guid">The guid of an element for which represntation is being created.</param>
/// <returns>A list containing one geometry for the IfcHalfSpaceSolid.</returns>
protected virtual IList <GeometryObject> CreateGeometryInternal(
IFCImportShapeEditScope shapeEditScope, Transform unscaledLcs, Transform scaledLcs, string guid)
{
IFCPlane ifcPlane = BaseSurface as IFCPlane;
Plane plane = ifcPlane.Plane;
XYZ origin = plane.Origin;
XYZ xVec = plane.XVec;
XYZ yVec = plane.YVec;
// Set some huge boundaries for now.
const double largeCoordinateValue = 100000;
XYZ[] corners = new XYZ[4] {
unscaledLcs.OfPoint((xVec * -largeCoordinateValue) + (yVec * -largeCoordinateValue) + origin),
unscaledLcs.OfPoint((xVec * largeCoordinateValue) + (yVec * -largeCoordinateValue) + origin),
unscaledLcs.OfPoint((xVec * largeCoordinateValue) + (yVec * largeCoordinateValue) + origin),
unscaledLcs.OfPoint((xVec * -largeCoordinateValue) + (yVec * largeCoordinateValue) + origin)
};
IList <CurveLoop> loops = new List <CurveLoop>();
CurveLoop loop = new CurveLoop();
for (int ii = 0; ii < 4; ii++)
{
if (AgreementFlag)
{
loop.Append(Line.CreateBound(corners[(5 - ii) % 4], corners[(4 - ii) % 4]));
}
else
{
loop.Append(Line.CreateBound(corners[ii], corners[(ii + 1) % 4]));
}
}
loops.Add(loop);
XYZ normal = unscaledLcs.OfVector(AgreementFlag ? -plane.Normal : plane.Normal);
SolidOptions solidOptions = new SolidOptions(GetMaterialElementId(shapeEditScope), shapeEditScope.GraphicsStyleId);
Solid baseSolid = GeometryCreationUtilities.CreateExtrusionGeometry(loops, normal, largeCoordinateValue, solidOptions);
if (BaseBoundingCurve != null)
{
CurveLoop polygonalBoundary = BaseBoundingCurve.CurveLoop;
Transform unscaledTotalTransform = unscaledLcs.Multiply(BaseBoundingCurveTransform);
Transform scaledTotalTransform = scaledLcs.Multiply(BaseBoundingCurveTransform);
// Make sure this bounding polygon extends below base of half-space soild.
Transform moveBaseTransform = Transform.Identity;
moveBaseTransform.Origin = new XYZ(0, 0, -largeCoordinateValue);
unscaledTotalTransform = unscaledTotalTransform.Multiply(moveBaseTransform);
scaledTotalTransform = scaledTotalTransform.Multiply(moveBaseTransform);
CurveLoop transformedPolygonalBoundary = IFCGeometryUtil.CreateTransformed(polygonalBoundary, Id, unscaledTotalTransform, scaledTotalTransform);
IList <CurveLoop> boundingLoops = new List <CurveLoop>();
boundingLoops.Add(transformedPolygonalBoundary);
Solid boundingSolid = GeometryCreationUtilities.CreateExtrusionGeometry(boundingLoops, unscaledTotalTransform.BasisZ, 2.0 * largeCoordinateValue,
solidOptions);
baseSolid = IFCGeometryUtil.ExecuteSafeBooleanOperation(Id, BaseBoundingCurve.Id, baseSolid, boundingSolid, BooleanOperationsType.Intersect, null);
}
IList <GeometryObject> returnList = new List <GeometryObject>();
returnList.Add(baseSolid);
return(returnList);
}
/// <summary>
/// Return geometry for a particular representation item.
/// </summary>
/// <param name="shapeEditScope">The geometry creation scope.</param>
/// <param name="unscaledLcs">The unscaled local coordinate system for the geometry, if the scaled version isn't supported downstream.</param>
/// <param name="scaledLcs">The scaled (true) local coordinate system for the geometry.</param>
/// <param name="guid">The guid of an element for which represntation is being created.</param>
/// <returns>The created geometry.</returns>
protected override IList <GeometryObject> CreateGeometryInternal(
IFCImportShapeEditScope shapeEditScope, Transform unscaledLcs, Transform scaledLcs, string guid)
{
Transform unscaledObjectPosition = (unscaledLcs == null) ? Position : unscaledLcs.Multiply(Position);
Transform scaledObjectPosition = (scaledLcs == null) ? Position : scaledLcs.Multiply(Position);
CurveLoop baseProfileCurve = Directrix.GetCurveLoop();
if (baseProfileCurve == null)
{
return(null);
}
CurveLoop trimmedDirectrix = IFCGeometryUtil.TrimCurveLoop(Id, baseProfileCurve, StartParameter, EndParameter);
if (trimmedDirectrix == null)
{
return(null);
}
double startParam = 0.0; // If the directrix isn't bound, this arbitrary parameter will do.
Transform originTrf0 = null;
Curve firstCurve0 = trimmedDirectrix.First();
if (firstCurve0.IsBound)
{
startParam = firstCurve0.GetEndParameter(0);
}
originTrf0 = firstCurve0.ComputeDerivatives(startParam, false);
if (originTrf0 == null)
{
return(null);
}
// Note: the computation of the reference Surface Local Transform must be done before the directrix is transform to LCS (because the ref surface isn't)
// and therefore the origin is at the start of the curve should be the start of the directrix that lies on the surface.
// This is needed to transform the swept area that must be perpendicular to the start of the directrix curve
Transform referenceSurfaceLocalTransform = ReferenceSurface.GetTransformAtPoint(originTrf0.Origin);
CurveLoop trimmedDirectrixInLCS = IFCGeometryUtil.CreateTransformed(trimmedDirectrix, Id, unscaledObjectPosition, scaledObjectPosition);
// Create the sweep.
Transform originTrf = null;
Curve firstCurve = trimmedDirectrixInLCS.First();
//if (firstCurve.IsBound)
// startParam = firstCurve.GetEndParameter(0);
originTrf = firstCurve.ComputeDerivatives(startParam, false);
Transform unscaledReferenceSurfaceTransform = unscaledObjectPosition.Multiply(referenceSurfaceLocalTransform);
Transform scaledReferenceSurfaceTransform = scaledObjectPosition.Multiply(referenceSurfaceLocalTransform);
Transform profileCurveLoopsTransform = Transform.CreateTranslation(originTrf.Origin);
profileCurveLoopsTransform.BasisX = scaledReferenceSurfaceTransform.BasisZ;
profileCurveLoopsTransform.BasisZ = originTrf.BasisX.Normalize();
profileCurveLoopsTransform.BasisY = profileCurveLoopsTransform.BasisZ.CrossProduct(profileCurveLoopsTransform.BasisX);
ISet <IList <CurveLoop> > profileCurveLoops = GetTransformedCurveLoops(profileCurveLoopsTransform, profileCurveLoopsTransform);
if (profileCurveLoops == null || profileCurveLoops.Count == 0)
{
return(null);
}
SolidOptions solidOptions = new SolidOptions(GetMaterialElementId(shapeEditScope), shapeEditScope.GraphicsStyleId);
IList <GeometryObject> myObjs = new List <GeometryObject>();
foreach (IList <CurveLoop> loops in profileCurveLoops)
{
GeometryObject myObj = GeometryCreationUtilities.CreateSweptGeometry(trimmedDirectrixInLCS, 0, startParam, loops, solidOptions);
if (myObj != null)
{
myObjs.Add(myObj);
}
}
return(myObjs);
}
/// <summary>
/// Return geometry for a particular representation item.
/// </summary>
/// <param name="shapeEditScope">The geometry creation scope.</param>
/// <param name="lcs">Local coordinate system for the geometry, without scale.</param>
/// <param name="scaledLcs">Local coordinate system for the geometry, including scale, potentially non-uniform.</param>
/// <param name="guid">The guid of an element for which represntation is being created.</param>
/// <returns>Zero or more created geometries.</returns>
protected override IList <GeometryObject> CreateGeometryInternal(
IFCImportShapeEditScope shapeEditScope, Transform lcs, Transform scaledLcs, string guid)
{
Transform sweptDiskPosition = (lcs == null) ? Transform.Identity : lcs;
CurveLoop baseProfileCurve = Directrix.GetCurveLoop();
if (baseProfileCurve == null)
{
return(null);
}
CurveLoop trimmedDirectrix = IFCGeometryUtil.TrimCurveLoop(baseProfileCurve, StartParameter, EndParameter);
if (trimmedDirectrix == null)
{
return(null);
}
CurveLoop trimmedDirectrixInLCS = IFCGeometryUtil.CreateTransformed(trimmedDirectrix, sweptDiskPosition);
// Create the disk.
Transform originTrf = null;
double startParam = 0.0; // If the directrix isn't bound, this arbitrary parameter will do.
foreach (Curve curve in trimmedDirectrixInLCS)
{
if (curve.IsBound)
{
startParam = curve.GetEndParameter(0);
}
originTrf = curve.ComputeDerivatives(startParam, false);
break;
}
if (originTrf == null)
{
return(null);
}
// The X-dir of the transform of the start of the directrix will form the normal of the disk.
Plane diskPlane = new Plane(originTrf.BasisX, originTrf.Origin);
IList <CurveLoop> profileCurveLoops = new List <CurveLoop>();
CurveLoop diskOuterCurveLoop = new CurveLoop();
diskOuterCurveLoop.Append(Arc.Create(diskPlane, Radius, 0, Math.PI));
diskOuterCurveLoop.Append(Arc.Create(diskPlane, Radius, Math.PI, 2.0 * Math.PI));
profileCurveLoops.Add(diskOuterCurveLoop);
if (InnerRadius.HasValue)
{
CurveLoop diskInnerCurveLoop = new CurveLoop();
diskInnerCurveLoop.Append(Arc.Create(diskPlane, InnerRadius.Value, 0, Math.PI));
diskInnerCurveLoop.Append(Arc.Create(diskPlane, InnerRadius.Value, Math.PI, 2.0 * Math.PI));
profileCurveLoops.Add(diskInnerCurveLoop);
}
SolidOptions solidOptions = new SolidOptions(GetMaterialElementId(shapeEditScope), shapeEditScope.GraphicsStyleId);
Solid sweptDiskSolid = GeometryCreationUtilities.CreateSweptGeometry(trimmedDirectrixInLCS, 0, startParam, profileCurveLoops,
solidOptions);
IList <GeometryObject> myObjs = new List <GeometryObject>();
if (sweptDiskSolid != null)
{
myObjs.Add(sweptDiskSolid);
}
return(myObjs);
}
/// <summary>
/// Return geometry for a particular representation item.
/// </summary>
/// <param name="shapeEditScope">The geometry creation scope.</param>
/// <param name="lcs">Local coordinate system for the geometry.</param>
/// <param name="guid">The guid of an element for which represntation is being created.</param>
/// <returns>The created geometry.</returns>
protected override IList <GeometryObject> CreateGeometryInternal(
IFCImportShapeEditScope shapeEditScope, Transform lcs, Transform scaledLcs, string guid)
{
Transform objectPosition = (lcs == null) ? Position : lcs.Multiply(Position);
CurveLoop baseProfileCurve = Directrix.GetCurveLoop();
if (baseProfileCurve == null)
{
return(null);
}
CurveLoop trimmedDirectrix = IFCGeometryUtil.TrimCurveLoop(baseProfileCurve, StartParameter, EndParameter);
if (trimmedDirectrix == null)
{
return(null);
}
CurveLoop trimmedDirectrixInLCS = IFCGeometryUtil.CreateTransformed(trimmedDirectrix, objectPosition);
// Create the sweep.
double startParam = 0.0; // If the directrix isn't bound, this arbitrary parameter will do.
Transform originTrf = null;
Curve firstCurve = trimmedDirectrixInLCS.First();
if (firstCurve.IsBound)
{
startParam = firstCurve.GetEndParameter(0);
}
originTrf = firstCurve.ComputeDerivatives(startParam, false);
if (originTrf == null)
{
return(null);
}
Transform referenceSurfaceLocalTransform = ReferenceSurface.GetTransformAtPoint(originTrf.Origin);
Transform referenceSurfaceTransform = objectPosition.Multiply(referenceSurfaceLocalTransform);
Transform profileCurveLoopsTransform = Transform.CreateTranslation(originTrf.Origin);
profileCurveLoopsTransform.BasisX = referenceSurfaceTransform.BasisZ;
profileCurveLoopsTransform.BasisZ = originTrf.BasisX.Normalize();
profileCurveLoopsTransform.BasisY = profileCurveLoopsTransform.BasisZ.CrossProduct(profileCurveLoopsTransform.BasisX);
ISet <IList <CurveLoop> > profileCurveLoops = GetTransformedCurveLoops(profileCurveLoopsTransform);
if (profileCurveLoops == null || profileCurveLoops.Count == 0)
{
return(null);
}
SolidOptions solidOptions = new SolidOptions(GetMaterialElementId(shapeEditScope), shapeEditScope.GraphicsStyleId);
IList <GeometryObject> myObjs = new List <GeometryObject>();
foreach (IList <CurveLoop> loops in profileCurveLoops)
{
GeometryObject myObj = GeometryCreationUtilities.CreateSweptGeometry(trimmedDirectrixInLCS, 0, startParam, loops, solidOptions);
if (myObj != null)
{
myObjs.Add(myObj);
}
}
return(myObjs);
}
/// <summary>
/// Return geometry for a particular representation item.
/// </summary>
/// <param name="shapeEditScope">The geometry creation scope.</param>
/// <param name="unscaledLcs">Local coordinate system for the geometry, without scale.</param>
/// <param name="scaledLcs">Local coordinate system for the geometry, including scale, potentially non-uniform.</param>
/// <param name="guid">The guid of an element for which represntation is being created.</param>
/// <returns>Zero or more created geometries.</returns>
protected override IList <GeometryObject> CreateGeometryInternal(
IFCImportShapeEditScope shapeEditScope, Transform unscaledLcs, Transform scaledLcs, string guid)
{
List <GeometryObject> myObjs = null;
if (scaledLcs == null || scaledLcs.IsConformal && MathUtil.IsAlmostEqual(scaledLcs.Scale, 1.0))
{
myObjs = CreateConformalGeometryIfPossible(shapeEditScope, unscaledLcs);
if (myObjs != null)
{
return(myObjs);
}
}
Transform unscaledSweptDiskPosition = (unscaledLcs == null) ? Transform.Identity : unscaledLcs;
Transform scaledSweptDiskPosition = (scaledLcs == null) ? Transform.Identity : scaledLcs;
IList <CurveLoop> trimmedDirectrices = IFCGeometryUtil.TrimCurveLoops(Id, Directrix, StartParameter, EndParameter);
if (trimmedDirectrices == null)
{
return(null);
}
foreach (CurveLoop trimmedDirectrix in trimmedDirectrices)
{
CurveLoop trimmedDirectrixInWCS = IFCGeometryUtil.CreateTransformed(trimmedDirectrix, Id, unscaledSweptDiskPosition, scaledSweptDiskPosition);
// Create the disk.
Curve firstCurve = null;
foreach (Curve curve in trimmedDirectrixInWCS)
{
firstCurve = curve;
break;
}
double startParam = 0.0;
IList <CurveLoop> profileCurveLoops = CreateProfileCurveLoopsForDirectrix(firstCurve, out startParam);
if (profileCurveLoops == null)
{
return(null);
}
SolidOptions solidOptions = new SolidOptions(GetMaterialElementId(shapeEditScope), shapeEditScope.GraphicsStyleId);
myObjs = new List <GeometryObject>();
try
{
Solid sweptDiskSolid = GeometryCreationUtilities.CreateSweptGeometry(trimmedDirectrixInWCS, 0, startParam, profileCurveLoops,
solidOptions);
if (sweptDiskSolid != null)
{
myObjs.Add(sweptDiskSolid);
}
}
catch (Exception ex)
{
// If we can't create a solid, we will attempt to split the Solid into valid pieces (that will likely have some overlap).
if (ex.Message.Contains("self-intersections") || ex.Message.Contains("Failed to create"))
{
(IList <GeometryObject>, bool)solidSegments = SplitSweptDiskIntoValidPieces(trimmedDirectrixInWCS, profileCurveLoops, solidOptions);
if (solidSegments.Item1 != null)
{
myObjs.AddRange(solidSegments.Item1);
}
// If Item2 is true, that means that the backup SplitSweptDiskIntoValidPieces routine was
// able to create (probably slightly self-intersecting) geometry for all of the pieces
// of the directrix. If it is false, then there was some part of the directrix that we
// couldn't create geometry for. Log a warning in the first case and an error in the
// second.
if (solidSegments.Item2)
{
Importer.TheLog.LogWarning(Id, "The IfcSweptDiskSolid definition does not define a valid solid, likely due to self-intersections or other such problems; the profile probably extends too far toward the inner curvature of the sweep path. Creating the minimum number of solids possible to represent the geometry.", false);
}
else
{
Importer.TheLog.LogError(Id, "The IfcSweptDiskSolid definition does not define a valid solid, likely due to self-intersections or other such problems; the profile probably extends too far toward the inner curvature of the sweep path. Creating as much of the geometry as possible.", false);
}
}
else
{
throw ex;
}
}
}
return(myObjs);
}