/// <summary>
/// Return geometry for a particular representation item.
/// </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>The created geometry.</returns>
/// <remarks>As this doesn't inherit from IfcSolidModel, this is a non-virtual CreateGeometry function.</remarks>
protected IList<GeometryObject> CreateGeometry(IFCImportShapeEditScope shapeEditScope, Transform lcs, Transform scaledLcs, string guid)
{
if (Shells.Count == 0)
return null;
IList<GeometryObject> geomObjs = null;
using (BuilderScope bs = shapeEditScope.InitializeBuilder(IFCShapeBuilderType.TessellatedShapeBuilder))
{
TessellatedShapeBuilderScope tsBuilderScope = bs as TessellatedShapeBuilderScope;
tsBuilderScope.StartCollectingFaceSet();
foreach (IFCConnectedFaceSet faceSet in Shells)
faceSet.CreateShape(shapeEditScope, lcs, scaledLcs, guid);
geomObjs = tsBuilderScope.CreateGeometry(guid);
}
if (geomObjs == null || geomObjs.Count == 0)
return null;
return geomObjs;
}
/// <summary>
/// Return geometry for a particular representation item.
/// </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>The created geometry.</returns>
/// <remarks>As this doesn't inherit from IfcSolidModel, this is a non-virtual CreateSolid function.</remarks>
protected IList<GeometryObject> CreateGeometry(
IFCImportShapeEditScope shapeEditScope, Transform lcs, Transform scaledLcs, string guid)
{
if (Shells.Count == 0)
return null;
IList<GeometryObject> geomObjs = null;
int numExpectedFaces = 0;
foreach (IFCConnectedFaceSet faceSet in Shells)
{
numExpectedFaces += faceSet.Faces.Count;
}
// We are going to start by trying to create a Solid, even if we are passed a shell-based model, since we can frequently
// do so. However, if we have even one missing face, we'll loosen the requirements and revert to mesh only.
for (int pass = 0; pass < 2; pass++)
{
IFCImportShapeEditScope.BuildPreferenceType target =
(pass == 0) ? IFCImportShapeEditScope.BuildPreferenceType.AnyGeometry : IFCImportShapeEditScope.BuildPreferenceType.AnyMesh;
using (IFCImportShapeEditScope.BuildPreferenceSetter setter =
new IFCImportShapeEditScope.BuildPreferenceSetter(shapeEditScope, target))
{
using (BuilderScope bs = shapeEditScope.InitializeBuilder(IFCShapeBuilderType.TessellatedShapeBuilder))
{
TessellatedShapeBuilderScope tsBuilderScope = shapeEditScope.BuilderScope as TessellatedShapeBuilderScope;
tsBuilderScope.StartCollectingFaceSet();
foreach (IFCConnectedFaceSet faceSet in Shells)
{
faceSet.CreateShape(shapeEditScope, lcs, scaledLcs, guid);
}
// If we are on our first pass, try again. If we are on our second pass, warn and create the best geometry we can.
if (tsBuilderScope.CreatedFacesCount != numExpectedFaces)
{
if (pass == 0)
continue;
Importer.TheLog.LogWarning
(Id, "Processing " + tsBuilderScope.CreatedFacesCount + " valid faces out of " + numExpectedFaces + " total.", false);
}
geomObjs = tsBuilderScope.CreateGeometry(guid);
WarnOnTooFewCreatedFaces(geomObjs, numExpectedFaces);
break;
}
}
}
if (geomObjs == null || geomObjs.Count == 0)
{
if (numExpectedFaces != 0)
{
Importer.TheLog.LogError
(Id, "No valid geometry found. This may be due to slivery triangles or other similar geometric issues.", false);
return null;
}
}
return geomObjs;
}
/// <summary>
/// Return geometry for a particular representation item.
/// </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>The created geometry.</returns>
protected override IList<GeometryObject> CreateGeometryInternal(
IFCImportShapeEditScope shapeEditScope, Transform lcs, Transform scaledLcs, string guid)
{
if (Outer == null || Outer.Faces.Count == 0)
return null;
IList<GeometryObject> geomObjs = null;
bool canRevertToMesh = false;
using (BuilderScope bs = shapeEditScope.InitializeBuilder(IFCShapeBuilderType.TessellatedShapeBuilder))
{
TessellatedShapeBuilderScope tsBuilderScope = bs as TessellatedShapeBuilderScope;
tsBuilderScope.StartCollectingFaceSet();
Outer.CreateShape(shapeEditScope, lcs, scaledLcs, guid);
if (tsBuilderScope.CreatedFacesCount == Outer.Faces.Count)
{
geomObjs = tsBuilderScope.CreateGeometry(guid);
}
canRevertToMesh = tsBuilderScope.CanRevertToMesh();
}
if (geomObjs == null || geomObjs.Count == 0)
{
if (canRevertToMesh)
{
using (IFCImportShapeEditScope.BuildPreferenceSetter setter =
new IFCImportShapeEditScope.BuildPreferenceSetter(shapeEditScope, IFCImportShapeEditScope.BuildPreferenceType.AnyMesh))
{
using (BuilderScope newBuilderScope = shapeEditScope.InitializeBuilder(IFCShapeBuilderType.TessellatedShapeBuilder))
{
TessellatedShapeBuilderScope newTsBuilderScope = newBuilderScope as TessellatedShapeBuilderScope;
// Let's see if we can loosen the requirements a bit, and try again.
newTsBuilderScope.StartCollectingFaceSet();
Outer.CreateShape(shapeEditScope, lcs, scaledLcs, guid);
// This needs to be in scope so that we keep the mesh tolerance for vertices.
if (newTsBuilderScope.CreatedFacesCount != 0)
{
if (newTsBuilderScope.CreatedFacesCount != Outer.Faces.Count)
Importer.TheLog.LogWarning
(Outer.Id, "Processing " + newTsBuilderScope.CreatedFacesCount + " valid faces out of " + Outer.Faces.Count + " total.", false);
geomObjs = newTsBuilderScope.CreateGeometry(guid);
}
}
}
}
}
if (geomObjs == null || geomObjs.Count == 0)
{
// Couldn't use fallback, or fallback didn't work.
Importer.TheLog.LogWarning(Id, "Couldn't create any geometry.", false);
return null;
}
return geomObjs;
}
protected override void CreateShapeInternal(IFCImportShapeEditScope shapeEditScope, Transform lcs, Transform scaledLcs, string guid)
{
using (BuilderScope bs = shapeEditScope.InitializeBuilder(IFCShapeBuilderType.TessellatedShapeBuilder))
{
base.CreateShapeInternal(shapeEditScope, lcs, scaledLcs, guid);
TessellatedShapeBuilderScope tsBuilderScope = bs as TessellatedShapeBuilderScope;
tsBuilderScope.StartCollectingFaceSet();
// Create triangle face set from CoordIndex. We do not support the Normals yet at this point
foreach (List<int> triIndex in CoordIndex)
{
// This is a defensive check in an unlikely situation that the index is larger than the data
if (triIndex[0] > Coordinates.CoordList.Count || triIndex[1] > Coordinates.CoordList.Count || triIndex[2] > Coordinates.CoordList.Count)
{
continue;
}
tsBuilderScope.StartCollectingFace(GetMaterialElementId(shapeEditScope));
IList<XYZ> loopVertices = new List<XYZ>();
IList<double> v1 = Coordinates.CoordList[triIndex[0] - 1];
IList<double> v2 = Coordinates.CoordList[triIndex[1] - 1];
IList<double> v3 = Coordinates.CoordList[triIndex[2] - 1];
loopVertices.Add(new XYZ(v1[0], v1[1], v1[2]));
loopVertices.Add(new XYZ(v2[0], v2[1], v2[2]));
loopVertices.Add(new XYZ(v3[0], v3[1], v3[2]));
IList<XYZ> transformedVertices = new List<XYZ>();
foreach (XYZ vertex in loopVertices)
{
// Need to apply the project unit scaling here
XYZ scaledVertex = applyProjectUnitScaleVertex(vertex);
transformedVertices.Add(scaledLcs.OfPoint(scaledVertex));
}
// Check triangle that is too narrow (2 vertices are within the tolerance
IList<XYZ> validVertices;
IFCGeometryUtil.CheckAnyDistanceVerticesWithinTolerance(Id, shapeEditScope, transformedVertices, out validVertices);
// We are going to catch any exceptions if the loop is invalid.
// We are going to hope that we can heal the parent object in the TessellatedShapeBuilder.
bool bPotentiallyAbortFace = false;
int count = validVertices.Count;
if (validVertices.Count < 3)
{
Importer.TheLog.LogComment(Id, "Too few distinct loop vertices (" + count + "), ignoring.", false);
bPotentiallyAbortFace = true;
}
else
{
if (!tsBuilderScope.AddLoopVertices(Id, validVertices))
bPotentiallyAbortFace = true;
}
if (bPotentiallyAbortFace)
tsBuilderScope.AbortCurrentFace();
else
tsBuilderScope.StopCollectingFace();
}
IList<GeometryObject> createdGeometries = tsBuilderScope.CreateGeometry(guid);
if (createdGeometries != null)
{
foreach (GeometryObject createdGeometry in createdGeometries)
{
shapeEditScope.AddGeometry(IFCSolidInfo.Create(Id, createdGeometry));
}
}
}
}
