/// <summary>
/// Create a copying of the geometry of an entity with a different graphics style.
/// </summary>
/// <param name="doc">The document.</param>
/// <param name="original">The IFCProduct we are partially copying.</param>
/// <param name="parentEntity">The IFCObjectDefinition we are going to add the geometry to.</param>
/// <param name="cloneParentMaterial">Determine whether to use the one material of the parent entity, if it exists and is unique.</param>
/// <returns>The list of geometries created with a new category and possibly material.</returns>
public static IList <IFCSolidInfo> CloneElementGeometry(Document doc, IFCProduct original, IFCObjectDefinition parentEntity, bool cloneParentMaterial)
{
using (TemporaryDisableLogging disableLogging = new TemporaryDisableLogging())
{
IFCElement clone = new IFCElement();
// Note that the GlobalId is left to null here; this allows us to later decide not to create a DirectShape for the result.
// Get the ObjectLocation and ProductRepresentation from the original entity, which is all we need to create geometry.
clone.ObjectLocation = original.ObjectLocation;
clone.ProductRepresentation = original.ProductRepresentation;
clone.MaterialSelect = original.MaterialSelect;
// Get the EntityType and PredefinedType from the parent to ensure that it "matches" the category and graphics style of the parent.
clone.EntityType = parentEntity.EntityType;
clone.PredefinedType = parentEntity.PredefinedType;
if (cloneParentMaterial)
{
// This will only work if the parent entity has one material.
IFCMaterial parentMaterial = parentEntity.GetTheMaterial();
if (parentMaterial != null)
{
clone.MaterialSelect = parentMaterial;
}
}
IList <GeometryObject> geomObjs = new List <GeometryObject>();
CreateElement(doc, clone);
return(clone.Solids);
}
}
/// <summary>
/// Create a simplified copy of a IFCFeatureElement, intended explicitly for the purpose of voiding a particular IFCElement.
/// </summary>
/// <param name="original">The IFCFeatureElement we are partially copying.</param>
/// <param name="parentEntity">The IFCElement we are voiding.</param>
/// <returns>A new IFCFeatureElement that is a minimal copy of original with influence by parentEntity.</returns>
public static IFCFeatureElement CreateOpeningClone(IFCFeatureElement original, IFCElement parentEntity)
{
IFCFeatureElement clone = new IFCFeatureElement();
// Note that the GlobalId is left to null here; this allows us to later decide not to create a DirectShape for the result.
// Get the ObjectLocation and ProductRepresentation from the original entity, which is all we need to create geometry.
clone.ObjectLocation = original.ObjectLocation;
clone.ProductRepresentation = original.ProductRepresentation;
// Get the EntityType and ShapeType from the parent to ensure that it "matches" the category and graphics style of the parent.
clone.EntityType = parentEntity.EntityType;
clone.ShapeType = parentEntity.ShapeType;
// Copy the material of the parent entity to try to match the color of the opening faces.
// This will work nicely if the parent entity is one material.
IFCMaterial parentMaterial = parentEntity.GetTheMaterial();
if (parentMaterial != null)
{
clone.MaterialSelect = parentMaterial;
}
return(clone);
}
protected override void Process(IFCAnyHandle ifcMaterialLayer)
{
base.Process(ifcMaterialLayer);
IFCAnyHandle ifcMaterial = IFCImportHandleUtil.GetOptionalInstanceAttribute(ifcMaterialLayer, "Material");
if (!IFCAnyHandleUtil.IsNullOrHasNoValue(ifcMaterial))
{
Material = IFCMaterial.ProcessIFCMaterial(ifcMaterial);
}
bool found = false;
LayerThickness = IFCImportHandleUtil.GetRequiredScaledLengthAttribute(ifcMaterialLayer, "LayerThickness", out found);
if (!found)
{
return;
}
// GetOptionalLogicalAttribute defaults to Unknown. We want to default to false here.
IsVentilated = IFCImportHandleUtil.GetOptionalLogicalAttribute(ifcMaterialLayer, "IsVentilated", out found);
if (!found)
{
IsVentilated = IFCLogical.False;
}
}
protected override void Process(IFCAnyHandle ifcMaterialProfile)
{
base.Process(ifcMaterialProfile);
IFCAnyHandle ifcMaterial = IFCImportHandleUtil.GetOptionalInstanceAttribute(ifcMaterialProfile, "Material");
if (!IFCAnyHandleUtil.IsNullOrHasNoValue(ifcMaterial))
{
Material = IFCMaterial.ProcessIFCMaterial(ifcMaterial);
}
IFCAnyHandle profileHnd = IFCImportHandleUtil.GetRequiredInstanceAttribute(ifcMaterialProfile, "Profile", true);
if (profileHnd != null)
{
Profile = IFCProfileDef.ProcessIFCProfileDef(profileHnd);
}
Name = IFCImportHandleUtil.GetOptionalStringAttribute(ifcMaterialProfile, "Name", null);
Description = IFCImportHandleUtil.GetOptionalStringAttribute(ifcMaterialProfile, "Description", null);
double prio = IFCImportHandleUtil.GetOptionalRealAttribute(ifcMaterialProfile, "Priority", -1);
if (prio >= 0)
{
Priority = prio;
}
Category = IFCImportHandleUtil.GetOptionalStringAttribute(ifcMaterialProfile, "Category", null);
return;
}
/// <summary>
/// Processes IfcProductRepresentation attributes.
/// </summary>
/// <param name="ifcProductRepresentation">The IfcProductRepresentation handle.</param>
protected override void Process(IFCAnyHandle ifcProductRepresentation)
{
base.Process(ifcProductRepresentation);
Name = IFCImportHandleUtil.GetOptionalStringAttribute(ifcProductRepresentation, "Name", null);
Description = IFCImportHandleUtil.GetOptionalStringAttribute(ifcProductRepresentation, "Description", null);
List <IFCAnyHandle> representations =
IFCAnyHandleUtil.GetAggregateInstanceAttribute <List <IFCAnyHandle> >(ifcProductRepresentation, "Representations");
if (representations != null)
{
foreach (IFCAnyHandle representationHnd in representations)
{
try
{
IFCRepresentation representation = IFCRepresentation.ProcessIFCRepresentation(representationHnd);
if (representation != null)
{
if (representation.RepresentationItems.Count > 0 || representation.BoundingBox != null)
{
Representations.Add(representation);
}
}
}
catch (Exception ex)
{
string msg = ex.Message;
// Ignore some specific errors.
if (msg != null)
{
if (!msg.Contains("not imported"))
{
Importer.TheLog.LogError(Id, msg, false);
}
}
}
}
}
if (IFCImportFile.TheFile.SchemaVersion >= IFCSchemaVersion.IFC2x3)
{
if (IFCAnyHandleUtil.IsSubTypeOf(ifcProductRepresentation, IFCEntityType.IfcMaterialDefinitionRepresentation))
{
IFCAnyHandle representedMaterial = IFCImportHandleUtil.GetRequiredInstanceAttribute(ifcProductRepresentation, "RepresentedMaterial", false);
if (!IFCAnyHandleUtil.IsNullOrHasNoValue(representedMaterial))
{
RepresentedMaterial = IFCMaterial.ProcessIFCMaterial(representedMaterial);
}
}
}
}
/// <summary>
/// Processes an IfcMaterial object.
/// </summary>
/// <param name="ifcMaterial">The IfcMaterial handle.</param>
/// <returns>The IFCMaterial object.</returns>
public static IFCMaterial ProcessIFCMaterial(IFCAnyHandle ifcMaterial)
{
if (IFCAnyHandleUtil.IsNullOrHasNoValue(ifcMaterial))
{
Importer.TheLog.LogNullError(IFCEntityType.IfcMaterial);
return(null);
}
IFCEntity material;
if (!IFCImportFile.TheFile.EntityMap.TryGetValue(ifcMaterial.StepId, out material))
{
material = new IFCMaterial(ifcMaterial);
}
return(material as IFCMaterial);
}
/// <summary>
/// Cleans out the IFCEntity to save memory.
/// </summary>
public override void CleanEntity()
{
base.CleanEntity();
m_ComposedObjectDefinitions = null;
m_AssignmentGroups = null;
m_ShapeType = null;
m_MaterialSelect = null;
m_TheMaterial = null;
m_TheMaterialIsSet = false;
}
/// <summary>
/// Gets the one material associated with this object.
/// </summary>
/// <returns>The material, if there is identically one; otherwise, null.</returns>
public IFCMaterial GetTheMaterial()
{
if (!m_TheMaterialIsSet)
{
IList <IFCMaterial> materials = GetMaterials();
m_TheMaterialIsSet = true;
IFCMaterial theMaterial = null;
if (materials.Count > 1)
{
return(null);
}
if (materials.Count == 1)
{
theMaterial = materials[0];
}
if (this is IFCObject)
{
IFCObject asObject = this as IFCObject;
foreach (IFCTypeObject typeObject in asObject.TypeObjects)
{
IList <IFCMaterial> typeMaterials = typeObject.GetMaterials();
if (typeMaterials.Count > 1)
{
return(null);
}
if (typeMaterials.Count == 1)
{
if (theMaterial != null && theMaterial.Id != typeMaterials[0].Id)
{
return(null);
}
theMaterial = typeMaterials[0];
}
}
}
m_TheMaterial = theMaterial;
}
return(m_TheMaterial);
}
/// <summary>
/// Returns the associated material id, if any.
/// </summary>
/// <param name="scope">The containing creation scope.</param>
/// <returns>The element id of the material, if any.</returns>
public virtual ElementId GetMaterialElementId(IFCImportShapeEditScope scope)
{
ElementId materialId = scope.GetCurrentMaterialId();
if (materialId != ElementId.InvalidElementId)
{
return(materialId);
}
if (scope.Creator != null)
{
IFCMaterial creatorMaterial = scope.Creator.GetTheMaterial();
if (creatorMaterial != null)
{
return(creatorMaterial.GetMaterialElementId());
}
}
return(ElementId.InvalidElementId);
}
protected override void Process(IFCAnyHandle ifcMaterialList)
{
base.Process(ifcMaterialList);
IList <IFCAnyHandle> ifcMaterials =
IFCAnyHandleUtil.GetAggregateInstanceAttribute <List <IFCAnyHandle> >(ifcMaterialList, "Materials");
if (ifcMaterials == null)
{
IFCImportFile.TheLog.LogError(ifcMaterialList.Id, "Expected at least 1 IfcMaterial, found none.", false);
return;
}
foreach (IFCAnyHandle ifcMaterial in ifcMaterials)
{
IFCMaterial material = IFCMaterial.ProcessIFCMaterial(ifcMaterial);
if (material != null)
{
Materials.Add(material);
}
}
}
protected override void Process(IFCAnyHandle ifcMaterialConstituent)
{
base.Process(ifcMaterialConstituent);
IFCAnyHandle ifcMaterial = IFCImportHandleUtil.GetRequiredInstanceAttribute(ifcMaterialConstituent, "Material", true);
if (!IFCAnyHandleUtil.IsNullOrHasNoValue(ifcMaterial))
{
Material = IFCMaterial.ProcessIFCMaterial(ifcMaterial);
}
Name = IFCImportHandleUtil.GetOptionalStringAttribute(ifcMaterialConstituent, "Name", null);
Description = IFCImportHandleUtil.GetOptionalStringAttribute(ifcMaterialConstituent, "Description", null);
double fraction = IFCImportHandleUtil.GetOptionalRealAttribute(ifcMaterialConstituent, "Fraction", -1);
if (fraction >= 0)
{
Fraction = fraction;
}
Category = IFCImportHandleUtil.GetOptionalStringAttribute(ifcMaterialConstituent, "Category", null);
return;
}
/// <summary>
/// Processes IfcRelAssociatesMaterial.
/// </summary>
/// <param name="ifcRelAssociatesMaterial">The IfcRelAssociatesMaterial handle.</param>
void ProcessIFCRelAssociatesMaterial(IFCAnyHandle ifcRelAssociatesMaterial)
{
IFCAnyHandle ifcMaterialSelect = IFCAnyHandleUtil.GetInstanceAttribute(ifcRelAssociatesMaterial, "RelatingMaterial");
if (IFCAnyHandleUtil.IsNullOrHasNoValue(ifcMaterialSelect))
{
IFCImportFile.TheLog.LogNullError(IFCEntityType.IfcRelAssociatesMaterial);
return;
}
// Deal with various types of IFCMaterialSelect.
if (IFCAnyHandleUtil.IsSubTypeOf(ifcMaterialSelect, IFCEntityType.IfcMaterial))
{
MaterialSelect = IFCMaterial.ProcessIFCMaterial(ifcMaterialSelect);
}
else if (IFCAnyHandleUtil.IsSubTypeOf(ifcMaterialSelect, IFCEntityType.IfcMaterialLayer))
{
MaterialSelect = IFCMaterialLayer.ProcessIFCMaterialLayer(ifcMaterialSelect);
}
else if (IFCAnyHandleUtil.IsSubTypeOf(ifcMaterialSelect, IFCEntityType.IfcMaterialLayerSet))
{
MaterialSelect = IFCMaterialLayerSet.ProcessIFCMaterialLayerSet(ifcMaterialSelect);
}
else if (IFCAnyHandleUtil.IsSubTypeOf(ifcMaterialSelect, IFCEntityType.IfcMaterialLayerSetUsage))
{
MaterialSelect = IFCMaterialLayerSetUsage.ProcessIFCMaterialLayerSetUsage(ifcMaterialSelect);
}
else if (IFCAnyHandleUtil.IsSubTypeOf(ifcMaterialSelect, IFCEntityType.IfcMaterialList))
{
MaterialSelect = IFCMaterialList.ProcessIFCMaterialList(ifcMaterialSelect);
}
else
{
IFCImportFile.TheLog.LogUnhandledSubTypeError(ifcMaterialSelect, "IfcMaterialSelect", false);
}
}
/// <summary>
/// Create the material associated to the element, and return the id.
/// </summary>
/// <param name="doc">The document.</param>
/// <param name="forcedName">An optional name that sets the name of the material created, regardless of surface style name.</param>
/// <param name="suggestedName">An optional name that suggests the name of the material created, if the surface style name is null.</param>
/// <param name="idOverride">The id of the parent item, used if forcedName is used.</param>
/// <returns>The material id.</returns>
/// <remarks>If forcedName is not null, this will not store the created element id in this class.</remarks>
public ElementId Create(Document doc, string forcedName, string suggestedName, int idOverride)
{
try
{
bool overrideName = (forcedName != null) && (string.Compare(forcedName, Name) != 0);
if (!overrideName && m_CreatedElementId != ElementId.InvalidElementId)
{
return(m_CreatedElementId);
}
string name = overrideName ? forcedName : Name;
if (string.IsNullOrEmpty(name))
{
if (!string.IsNullOrEmpty(suggestedName))
{
name = suggestedName;
}
else
{
name = "IFC Surface Style";
}
}
int id = overrideName ? idOverride : Id;
if (IsValidForCreation)
{
Color color = null;
int? transparency = null;
int? shininess = null;
int? smoothness = null;
IFCSurfaceStyleShading shading = ShadingStyle;
if (shading != null)
{
color = shading.GetSurfaceColor();
transparency = (int)(shading.Transparency * 100 + 0.5);
shininess = shading.GetShininess();
smoothness = shading.GetSmoothness();
}
IFCMaterialInfo materialInfo =
IFCMaterialInfo.Create(color, transparency, shininess, smoothness, ElementId.InvalidElementId);
ElementId createdElementId = IFCMaterial.CreateMaterialElem(doc, id, name, materialInfo);
if (!overrideName)
{
m_CreatedElementId = createdElementId;
}
return(createdElementId);
}
else
{
IsValidForCreation = false;
}
}
catch (Exception ex)
{
IsValidForCreation = false;
Importer.TheLog.LogCreationError(this, ex.Message, false);
}
return(ElementId.InvalidElementId);
}
private GeometryObject CreateGeometryFromMateriaProfile(IFCImportShapeEditScope shapeEditScope,
IList <CurveLoop> loops, XYZ extrusionDirection, double currDepth, SolidOptions solidOptions, out bool shouldWarn)
{
GeometryObject extrusionSolid = null;
try
{
shouldWarn = true; // invalid input
IIFCMaterialSelect materialSelect = shapeEditScope.Creator.MaterialSelect;
if (materialSelect == null)
{
return(null);
}
IFCMaterialProfileSetUsage matProfSetUsage = materialSelect as IFCMaterialProfileSetUsage;
if (matProfSetUsage == null)
{
return(null);
}
IFCMaterialProfileSet matProfSet = matProfSetUsage.ForProfileSet;
if (matProfSet == null)
{
return(null);
}
IList <IFCMaterialProfile> matProfList = matProfSet.MaterialProfileSet;
if (matProfList.Count == 0)
{
return(null);
}
Transform transformByOffset = Transform.Identity;
IList <CurveLoop> newloops = new List <CurveLoop>();
ElementId materialId = null;
foreach (IFCMaterialProfile matProf in matProfList)
{
if (this.SweptArea.Id == matProf.Profile.Id)
{
// This is the same id (same profile), use the material name for creation of this geometry
IFCMaterial theMaterial = matProf.Material;
if (theMaterial != null)
{
materialId = theMaterial.GetMaterialElementId();
solidOptions.MaterialId = materialId; // Override the original option if the profile has a specific material id
}
// Here we will handle special case if the Material Profile has Offset
if (matProf is IFCMaterialProfileWithOffsets)
{
IFCMaterialProfileWithOffsets matProfOffset = matProf as IFCMaterialProfileWithOffsets;
double startOffset = matProfOffset.OffsetValues[0];
double endOffset = 0;
if (matProfOffset.OffsetValues.Count > 1)
{
endOffset = matProfOffset.OffsetValues[1];
}
// To handle offset, we need to move the start point (extrusion position) to the startOffset value along the axis (extrusion direction)
// For the end offset, we will have to re-calculate the extrusion
currDepth = currDepth - startOffset + endOffset;
transformByOffset.Origin += startOffset * extrusionDirection;
foreach (CurveLoop loop in loops)
{
CurveLoop newLoop = CurveLoop.CreateViaTransform(loop, transformByOffset);
newloops.Add(newLoop);
}
}
break;
}
}
if (newloops.Count == 0)
{
extrusionSolid = GeometryCreationUtilities.CreateExtrusionGeometry(loops, extrusionDirection, currDepth, solidOptions);
}
else
{
extrusionSolid = GeometryCreationUtilities.CreateExtrusionGeometry(newloops, extrusionDirection, currDepth, solidOptions);
}
}
catch
{
// Ignore the specific exception, but let the user know there was a problem processing the IfcMaterialLayerSetUsage.
shouldWarn = true;
return(null);
}
return(extrusionSolid);
}
/// <summary>
/// Processes an IfcMaterial object.
/// </summary>
/// <param name="ifcMaterial">The IfcMaterial handle.</param>
/// <returns>The IFCMaterial object.</returns>
public static IFCMaterial ProcessIFCMaterial(IFCAnyHandle ifcMaterial)
{
if (IFCAnyHandleUtil.IsNullOrHasNoValue(ifcMaterial))
{
Importer.TheLog.LogNullError(IFCEntityType.IfcMaterial);
return null;
}
IFCEntity material;
if (!IFCImportFile.TheFile.EntityMap.TryGetValue(ifcMaterial.StepId, out material))
material = new IFCMaterial(ifcMaterial);
return (material as IFCMaterial);
}
// This routine may return null geometry for one of three reasons:
// 1. Invalid input.
// 2. No IfcMaterialLayerUsage.
// 3. The IfcMaterialLayerUsage isn't handled.
// If the reason is #1 or #3, we want to warn the user. If it is #2, we don't. Pass back shouldWarn to let the caller know.
private IList <GeometryObject> CreateGeometryFromMaterialLayerUsage(IFCImportShapeEditScope shapeEditScope, Transform extrusionPosition,
IList <CurveLoop> loops, XYZ extrusionDirection, double currDepth, out ElementId materialId, out bool shouldWarn)
{
IList <GeometryObject> extrusionSolids = null;
materialId = ElementId.InvalidElementId;
try
{
shouldWarn = true; // Invalid input.
// Check for valid input.
if (shapeEditScope == null ||
extrusionPosition == null ||
loops == null ||
loops.Count() == 0 ||
extrusionDirection == null ||
!Application.IsValidThickness(currDepth))
{
return(null);
}
IFCProduct creator = shapeEditScope.Creator;
if (creator == null)
{
return(null);
}
shouldWarn = false; // Missing, empty, or optimized out IfcMaterialLayerSetUsage - valid reason to stop.
IIFCMaterialSelect materialSelect = creator.MaterialSelect;
if (materialSelect == null)
{
return(null);
}
IFCMaterialLayerSetUsage materialLayerSetUsage = materialSelect as IFCMaterialLayerSetUsage;
if (materialLayerSetUsage == null)
{
return(null);
}
IFCMaterialLayerSet materialLayerSet = materialLayerSetUsage.MaterialLayerSet;
if (materialLayerSet == null)
{
return(null);
}
IList <IFCMaterialLayer> materialLayers = materialLayerSet.MaterialLayers;
if (materialLayers == null || materialLayers.Count == 0)
{
return(null);
}
// Optimization: if there is only one layer, use the standard method, with possibly an overloaded material.
ElementId baseMaterialId = GetMaterialElementId(shapeEditScope);
if (materialLayers.Count == 1)
{
IFCMaterial oneMaterial = materialLayers[0].Material;
if (oneMaterial == null)
{
return(null);
}
materialId = oneMaterial.GetMaterialElementId();
if (materialId != ElementId.InvalidElementId)
{
// We will not override the material of the element if the layer material has no color.
if (Importer.TheCache.MaterialsWithNoColor.Contains(materialId))
{
materialId = ElementId.InvalidElementId;
}
}
return(null);
}
// Anything below here is something we should report to the user, with the exception of the total thickness
// not matching the extrusion thickness. This would require more analysis to determine that it is actually
// an error condition.
shouldWarn = true;
IList <IFCMaterialLayer> realMaterialLayers = new List <IFCMaterialLayer>();
double totalThickness = 0.0;
foreach (IFCMaterialLayer materialLayer in materialLayers)
{
double depth = materialLayer.LayerThickness;
if (MathUtil.IsAlmostZero(depth))
{
continue;
}
if (depth < 0.0)
{
return(null);
}
realMaterialLayers.Add(materialLayer);
totalThickness += depth;
}
// Axis3 means that the material layers are stacked in the Z direction. This is common for floor slabs.
bool isAxis3 = (materialLayerSetUsage.Direction == IFCLayerSetDirection.Axis3);
// For elements extruded in the Z direction, if the extrusion layers don't have the same thickness as the extrusion,
// this could be one of two reasons:
// 1. There is a discrepancy between the extrusion depth and the material layer set usage calculated depth.
// 2. There are multiple extrusions in the body definition.
// In either case, we will use the extrusion geometry over the calculated material layer set usage geometry.
// In the future, we may decide to allow for case #1 by passing in a flag to allow for this.
if (isAxis3 && !MathUtil.IsAlmostEqual(totalThickness, currDepth))
{
shouldWarn = false;
return(null);
}
int numLayers = realMaterialLayers.Count();
if (numLayers == 0)
{
return(null);
}
// We'll use this initial value for the Axis2 case, so read it here.
double baseOffsetForLayer = materialLayerSetUsage.Offset;
// Needed for Axis2 case only. The axisCurve is the curve defined in the product representation representing
// a base curve (an axis) for the footprint of the element.
Curve axisCurve = null;
// The oriented cuve list represents the 4 curves of supported Axis2 footprint in the following order:
// 1. curve along length of object closest to the first material layer with the orientation of the axis curve
// 2. connecting end curve
// 3. curve along length of object closest to the last material layer with the orientation opposite of the axis curve
// 4. connecting end curve.
IList <Curve> orientedCurveList = null;
if (!isAxis3)
{
// Axis2 means that the material layers are stacked inthe Y direction. This is by definition for IfcWallStandardCase,
// which has a local coordinate system whose Y direction is orthogonal to the length of the wall.
if (materialLayerSetUsage.Direction == IFCLayerSetDirection.Axis2)
{
axisCurve = GetAxisCurve(creator, extrusionPosition);
if (axisCurve == null)
{
return(null);
}
orientedCurveList = GetOrientedCurveList(loops, axisCurve, extrusionPosition.BasisZ, baseOffsetForLayer, totalThickness);
if (orientedCurveList == null)
{
return(null);
}
}
else
{
return(null); // Not handled.
}
}
extrusionSolids = new List <GeometryObject>();
bool positiveOrientation = (materialLayerSetUsage.DirectionSense == IFCDirectionSense.Positive);
// Always extrude in the positive direction for Axis2.
XYZ materialExtrusionDirection = (positiveOrientation || !isAxis3) ? extrusionDirection : -extrusionDirection;
// Axis2 repeated values.
// The IFC concept of offset direction is reversed from Revit's.
XYZ normalDirectionForAxis2 = positiveOrientation ? -extrusionPosition.BasisZ : extrusionPosition.BasisZ;
bool axisIsCyclic = (axisCurve == null) ? false : axisCurve.IsCyclic;
double axisCurvePeriod = axisIsCyclic ? axisCurve.Period : 0.0;
Transform curveLoopTransform = Transform.Identity;
IList <CurveLoop> currLoops = null;
double depthSoFar = 0.0;
for (int ii = 0; ii < numLayers; ii++)
{
IFCMaterialLayer materialLayer = materialLayers[ii];
// Ignore 0 thickness layers. No need to warn.
double depth = materialLayer.LayerThickness;
if (MathUtil.IsAlmostZero(depth))
{
continue;
}
// If the thickness is non-zero but invalid, fail.
if (!Application.IsValidThickness(depth))
{
return(null);
}
double extrusionDistance = 0.0;
if (isAxis3)
{
// Offset the curve loops if necessary, using the base extrusionDirection, regardless of the direction sense
// of the MaterialLayerSetUsage.
double offsetForLayer = positiveOrientation ? baseOffsetForLayer + depthSoFar : baseOffsetForLayer - depthSoFar;
if (!MathUtil.IsAlmostZero(offsetForLayer))
{
curveLoopTransform.Origin = offsetForLayer * extrusionDirection;
currLoops = new List <CurveLoop>();
foreach (CurveLoop loop in loops)
{
CurveLoop newLoop = CurveLoop.CreateViaTransform(loop, curveLoopTransform);
if (newLoop == null)
{
return(null);
}
currLoops.Add(newLoop);
}
}
else
{
currLoops = loops;
}
extrusionDistance = depth;
}
else
{
// startClipCurve, firstEndCapCurve, endClipCurve, secondEndCapCurve.
Curve[] outline = new Curve[4];
double[][] endParameters = new double[4][];
double startClip = depthSoFar;
double endClip = depthSoFar + depth;
outline[0] = orientedCurveList[0].CreateOffset(startClip, normalDirectionForAxis2);
outline[1] = orientedCurveList[1].Clone();
outline[2] = orientedCurveList[2].CreateOffset(totalThickness - endClip, normalDirectionForAxis2);
outline[3] = orientedCurveList[3].Clone();
for (int jj = 0; jj < 4; jj++)
{
outline[jj].MakeUnbound();
endParameters[jj] = new double[2];
endParameters[jj][0] = 0.0;
endParameters[jj][1] = 0.0;
}
// Trim/Extend the curves so that they make a closed loop.
for (int jj = 0; jj < 4; jj++)
{
IntersectionResultArray resultArray = null;
outline[jj].Intersect(outline[(jj + 1) % 4], out resultArray);
if (resultArray == null || resultArray.Size == 0)
{
return(null);
}
int numResults = resultArray.Size;
if ((numResults > 1 && !axisIsCyclic) || (numResults > 2))
{
return(null);
}
UV intersectionPoint = resultArray.get_Item(0).UVPoint;
endParameters[jj][1] = intersectionPoint.U;
endParameters[(jj + 1) % 4][0] = intersectionPoint.V;
if (numResults == 2)
{
// If the current result is closer to the end of the curve, keep it.
UV newIntersectionPoint = resultArray.get_Item(1).UVPoint;
int endParamIndex = (jj % 2);
double newParamToCheck = newIntersectionPoint[endParamIndex];
double oldParamToCheck = (endParamIndex == 0) ? endParameters[jj][1] : endParameters[(jj + 1) % 4][0];
double currentEndPoint = (endParamIndex == 0) ?
orientedCurveList[jj].GetEndParameter(1) : orientedCurveList[(jj + 1) % 4].GetEndParameter(0);
// Put in range of [-Period/2, Period/2].
double newDist = (currentEndPoint - newParamToCheck) % axisCurvePeriod;
if (newDist < -axisCurvePeriod / 2.0)
{
newDist += axisCurvePeriod;
}
if (newDist > axisCurvePeriod / 2.0)
{
newDist -= axisCurvePeriod;
}
double oldDist = (currentEndPoint - oldParamToCheck) % axisCurvePeriod;
if (oldDist < -axisCurvePeriod / 2.0)
{
oldDist += axisCurvePeriod;
}
if (oldDist > axisCurvePeriod / 2.0)
{
oldDist -= axisCurvePeriod;
}
if (Math.Abs(newDist) < Math.Abs(oldDist))
{
endParameters[jj][1] = newIntersectionPoint.U;
endParameters[(jj + 1) % 4][0] = newIntersectionPoint.V;
}
}
}
CurveLoop newCurveLoop = new CurveLoop();
for (int jj = 0; jj < 4; jj++)
{
if (endParameters[jj][1] < endParameters[jj][0])
{
if (!outline[jj].IsCyclic)
{
return(null);
}
endParameters[jj][1] += Math.Floor(endParameters[jj][0] / axisCurvePeriod + 1.0) * axisCurvePeriod;
}
outline[jj].MakeBound(endParameters[jj][0], endParameters[jj][1]);
newCurveLoop.Append(outline[jj]);
}
currLoops = new List <CurveLoop>();
currLoops.Add(newCurveLoop);
extrusionDistance = currDepth;
}
// Determine the material id.
IFCMaterial material = materialLayer.Material;
ElementId layerMaterialId = (material == null) ? ElementId.InvalidElementId : material.GetMaterialElementId();
// The second option here is really for Referencing. Without a UI (yet) to determine whether to show the base
// extusion or the layers for objects with material layer sets, we've chosen to display the base material if the layer material
// has no color information. This means that the layer is assigned the "wrong" material, but looks better on screen.
// We will reexamine this decision (1) for the Open case, (2) if there is UI to toggle between layers and base extrusion, or
// (3) based on user feedback.
if (layerMaterialId == ElementId.InvalidElementId || Importer.TheCache.MaterialsWithNoColor.Contains(layerMaterialId))
{
layerMaterialId = baseMaterialId;
}
SolidOptions solidOptions = new SolidOptions(layerMaterialId, shapeEditScope.GraphicsStyleId);
// Create the extrusion for the material layer.
GeometryObject extrusionSolid = GeometryCreationUtilities.CreateExtrusionGeometry(
currLoops, materialExtrusionDirection, extrusionDistance, solidOptions);
if (extrusionSolid == null)
{
return(null);
}
extrusionSolids.Add(extrusionSolid);
depthSoFar += depth;
}
}
catch
{
// Ignore the specific exception, but let the user know there was a problem processing the IfcMaterialLayerSetUsage.
shouldWarn = true;
return(null);
}
return(extrusionSolids);
}
/// <summary>
/// Gets the one material associated with this object.
/// </summary>
/// <returns>The material, if there is identically one; otherwise, null.</returns>
public IFCMaterial GetTheMaterial()
{
if (!m_TheMaterialIsSet)
{
IList<IFCMaterial> materials = GetMaterials();
m_TheMaterialIsSet = true;
IFCMaterial theMaterial = null;
if (materials.Count > 1)
return null;
if (materials.Count == 1)
theMaterial = materials[0];
if (this is IFCObject)
{
IFCObject asObject = this as IFCObject;
foreach (IFCTypeObject typeObject in asObject.TypeObjects)
{
IList<IFCMaterial> typeMaterials = typeObject.GetMaterials();
if (typeMaterials.Count > 1)
return null;
if (typeMaterials.Count == 1)
{
if (theMaterial != null && theMaterial.Id != typeMaterials[0].Id)
return null;
theMaterial = typeMaterials[0];
}
}
}
m_TheMaterial = theMaterial;
}
return m_TheMaterial;
}
/// <summary>
/// Processes IfcProductRepresentation attributes.
/// </summary>
/// <param name="ifcProductRepresentation">The IfcProductRepresentation handle.</param>
protected override void Process(IFCAnyHandle ifcProductRepresentation)
{
base.Process(ifcProductRepresentation);
Name = IFCImportHandleUtil.GetOptionalStringAttribute(ifcProductRepresentation, "Name", null);
Description = IFCImportHandleUtil.GetOptionalStringAttribute(ifcProductRepresentation, "Description", null);
List<IFCAnyHandle> representations =
IFCAnyHandleUtil.GetAggregateInstanceAttribute<List<IFCAnyHandle>>(ifcProductRepresentation, "Representations");
if (representations != null)
{
foreach (IFCAnyHandle representationHnd in representations)
{
try
{
IFCRepresentation representation = IFCRepresentation.ProcessIFCRepresentation(representationHnd);
if (representation != null)
{
if (representation.RepresentationItems.Count > 0)
Representations.Add(representation);
}
}
catch (Exception ex)
{
string msg = ex.Message;
// Ignore some specific errors.
if (msg != null)
{
if (!msg.Contains("not imported"))
IFCImportFile.TheLog.LogError(Id, msg, false);
}
}
}
}
if (IFCImportFile.TheFile.SchemaVersion >= IFCSchemaVersion.IFC2x3)
{
if (IFCAnyHandleUtil.IsSubTypeOf(ifcProductRepresentation, IFCEntityType.IfcMaterialDefinitionRepresentation))
{
IFCAnyHandle representedMaterial = IFCImportHandleUtil.GetRequiredInstanceAttribute(ifcProductRepresentation, "RepresentedMaterial", false);
if (!IFCAnyHandleUtil.IsNullOrHasNoValue(representedMaterial))
RepresentedMaterial = IFCMaterial.ProcessIFCMaterial(representedMaterial);
}
}
}
/// <summary>
/// Cleans out the IFCEntity to save memory.
/// </summary>
public override void CleanEntity()
{
base.CleanEntity();
m_ComposedObjectDefinitions = null;
m_AssignmentGroups = null;
m_ShapeType = null;
m_MaterialSelect = null;
m_TheMaterial = null;
m_TheMaterialIsSet = false;
}
