private Tuple <IList <GeometryObject>, bool> CollectFaces(IFCImportShapeEditScope shapeEditScope,
Transform lcs, Transform scaledLcs, string guid)
{
using (BuilderScope bs = shapeEditScope.InitializeBuilder(IFCShapeBuilderType.TessellatedShapeBuilder))
{
TessellatedShapeBuilderScope tsBuilderScope = bs as TessellatedShapeBuilderScope;
tsBuilderScope.StartCollectingFaceSet();
Outer.CreateShape(shapeEditScope, lcs, scaledLcs, guid);
IList <GeometryObject> geomObjs = null;
bool canRevertToMesh = tsBuilderScope.CanRevertToMesh();
int numCreatedFaces = tsBuilderScope.CreatedFacesCount;
int numExpectedFaces = Outer.Faces.Count;
if (numCreatedFaces == numExpectedFaces || (!canRevertToMesh && numCreatedFaces > 0))
{
geomObjs = tsBuilderScope.CreateGeometry(guid);
if (numCreatedFaces < numExpectedFaces)
{
Importer.TheLog.LogWarning(Outer.Id,
"Processing " + numCreatedFaces + " valid faces out of " + numExpectedFaces + " total.", false);
}
}
return(Tuple.Create(geomObjs, canRevertToMesh));
}
}
/// <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)
{
if (CoordIndex == null)
{
Importer.TheLog.LogError(Id, "Invalid coordinates for this triangulation, ignoring.", false);
return;
}
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;
}
// This is already triangulated, so no need to attempt triangulation here.
tsBuilderScope.StartCollectingFace(GetMaterialElementId(shapeEditScope), false);
IList <XYZ> loopVertices = new List <XYZ>();
for (int ii = 0; ii < 3; ++ii)
{
int actualVIdx = triIndex[ii] - 1;
if (PnIndex != null)
{
actualVIdx = PnIndex[actualVIdx] - 1;
}
XYZ vv = Coordinates.CoordList[actualVIdx];
loopVertices.Add(vv);
}
IList <XYZ> transformedVertices = new List <XYZ>();
foreach (XYZ vertex in loopVertices)
{
transformedVertices.Add(scaledLcs.OfPoint(vertex));
}
// Check triangle that is too narrow (2 vertices are within the tolerance
IFCGeometryUtil.CheckAnyDistanceVerticesWithinTolerance(Id, shapeEditScope, transformedVertices, out List <XYZ> validVertices);
if (validVertices.Count != transformedVertices.Count && tsBuilderScope.CanRevertToMesh())
{
tsBuilderScope.RevertToMeshIfPossible();
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;
}
}
tsBuilderScope.StopCollectingFace(!bPotentiallyAbortFace, false);
}
IList <GeometryObject> createdGeometries = tsBuilderScope.CreateGeometry(guid);
if (createdGeometries != null)
{
foreach (GeometryObject createdGeometry in createdGeometries)
{
shapeEditScope.AddGeometry(IFCSolidInfo.Create(Id, createdGeometry));
}
}
}
}