private static IfcStyledItem ToIfcStyledItem(this Material material, IfcRepresentationItem shape, Document doc)
{
var color = material.Color.ToIfcColourRgb(doc);
var shading = new IfcSurfaceStyleShading(color);
var styles = new List <IfcSurfaceStyleElementSelect> {
};
styles.Add(new IfcSurfaceStyleElementSelect(shading));
var surfaceStyle = new IfcSurfaceStyle(material.Name, IfcSurfaceSide.POSITIVE, styles);
var styleSelect = new IfcPresentationStyleSelect(surfaceStyle);
var assign = new IfcPresentationStyleAssignment(new List <IfcPresentationStyleSelect> {
styleSelect
});
var assignments = new List <IfcPresentationStyleAssignment>();
assignments.Add(assign);
var styledByItem = new IfcStyledItem(shape, assignments, material.Name);
doc.AddEntity(color);
doc.AddEntity(shading);
doc.AddEntity(surfaceStyle);
doc.AddEntity(styleSelect);
doc.AddEntity(assign);
return(styledByItem);
}
private static Boolean tryGetColorFromIfcRepresentationItem(IfcRepresentationItem reprItem, out Color color)
{
color = Color.Black;
try
{
if (reprItem.mStyledByItem != null)
{
IfcStyledItem ifcStyledItem = reprItem.mStyledByItem;
IfcPresentationStyleAssignment sas = (IfcPresentationStyleAssignment)ifcStyledItem.Styles[0];
IfcSurfaceStyle ss = (IfcSurfaceStyle)sas.Styles[0];
IfcSurfaceStyleRendering ssr = (IfcSurfaceStyleRendering)ss.Styles[0];
int alpha = Convert.ToInt32((1 - ssr.Transparency) * 255);
color = Color.FromArgb(alpha, ssr.SurfaceColour.Colour);
return(true);
}
}
catch (Exception e)
{
//debug += e.Message + "\n";
}
return(false);
}
public static IfcPresentationStyleAssignment GetPresentationStyleAssignment(this IfcRepresentationItem repItem)
{
IfcStyledItem item = repItem.StyledByItem.FirstOrDefault();
if (item != null && item.Styles != null)
{
return(item.Styles.FirstOrDefault());
}
else
{
return(null);
}
}
/// <summary>
/// Returns the first IfcSurfaceStyle associated with the representation item
/// </summary>
/// <param name="repItem"></param>
/// <returns></returns>
public static IfcSurfaceStyle SurfaceStyle(this IfcRepresentationItem repItem)
{
IfcStyledItem styledItem = repItem.ModelOf.Instances.Where <IfcStyledItem>(s => s.Item == repItem).FirstOrDefault();
if (styledItem != null)
{
foreach (var presStyle in styledItem.Styles)
{
if (presStyle != null)
{
IfcSurfaceStyle aSurfaceStyle = presStyle.Styles.OfType <IfcSurfaceStyle>().FirstOrDefault();
if (aSurfaceStyle != null)
{
return(aSurfaceStyle);
}
}
}
}
return(null);
}
/// <summary>
/// IFC only allows one presentation style assignment
/// </summary>
/// <param name = "si"></param>
/// <returns></returns>
public static IfcPresentationStyleAssignment GetPresentationStyleAssignment(this IfcStyledItem si)
{
return(si.Styles.OfType <IfcPresentationStyleAssignment>().FirstOrDefault());
}
internal static List <IfcProduct> ToIfcProducts(this Element e,
IfcRepresentationContext context,
Document doc,
Dictionary <Guid, List <IfcStyleAssignmentSelect> > styleAssignments)
{
var products = new List <IfcProduct>();
IfcProductDefinitionShape shape = null;
GeometricElement geoElement = null;
Transform trans = null;
Guid id = default(Guid);
if (e is ElementInstance)
{
// If we're using an element instance, get the transform
// and the id and use those to uniquely position and
// identify the element.
var instance = (ElementInstance)e;
geoElement = instance.BaseDefinition;
id = instance.Id;
trans = instance.Transform;
}
else if (e is GeometricElement)
{
// If we've go a geometric element, use its properties as-is.
geoElement = (GeometricElement)e;
id = geoElement.Id;
trans = geoElement.Transform;
}
geoElement.UpdateRepresentations();
var localPlacement = trans.ToIfcLocalPlacement(doc);
doc.AddEntity(localPlacement);
var geoms = new List <IfcRepresentationItem>();
if (geoElement is MeshElement)
{
var meshEl = (MeshElement)geoElement;
var lengths = meshEl.Mesh.Vertices.Select(v => v.Position.ToArray().Select(vi => new IfcLengthMeasure(vi)).ToList()).ToList();
var pts = new IfcCartesianPointList3D(lengths);
doc.AddEntity(pts);
var indices = meshEl.Mesh.Triangles.Select(t => t.Vertices.Select(vx => new IfcPositiveInteger(vx.Index + 1)).ToList()).ToList();
var idxs = new List <List <IfcPositiveInteger> >(indices);
var geom = new IfcTriangulatedFaceSet(pts, indices);
geom.Closed = false;
doc.AddEntity(geom);
geoms.Add(geom);
shape = ToIfcProductDefinitionShape(geoms, "Tessellation", context, doc);
}
else
{
foreach (var op in geoElement.Representation.SolidOperations)
{
if (op is Sweep)
{
var sweep = (Sweep)op;
// Neither of these entities, which are part of the
// IFC4 specification, and which would allow a sweep
// along a curve, are supported by many applications
// which are supposedly IFC4 compliant (Revit). For
// Those applications where these entities appear,
// the rotation of the profile is often wrong or
// inconsistent.
// geom = sweep.ToIfcSurfaceCurveSweptAreaSolid(doc);
// geom = sweep.ToIfcFixedReferenceSweptAreaSolid(geoElement.Transform, doc);
// Instead, we'll divide the curve and create a set of
// linear extrusions instead.
Polyline pline;
if (sweep.Curve is Line)
{
pline = sweep.Curve.ToPolyline(1);
}
else
{
pline = sweep.Curve.ToPolyline();
}
foreach (var segment in pline.Segments())
{
var position = segment.TransformAt(0.0).ToIfcAxis2Placement3D(doc);
var extrudeDepth = segment.Length();
var extrudeProfile = sweep.Profile.Perimeter.ToIfcArbitraryClosedProfileDef(doc);
var extrudeDirection = Vector3.ZAxis.Negate().ToIfcDirection();
var geom = new IfcExtrudedAreaSolid(extrudeProfile, position,
extrudeDirection, new IfcPositiveLengthMeasure(extrudeDepth));
doc.AddEntity(extrudeProfile);
doc.AddEntity(extrudeDirection);
doc.AddEntity(position);
doc.AddEntity(geom);
geoms.Add(geom);
}
}
else if (op is Extrude)
{
var extrude = (Extrude)op;
var geom = extrude.ToIfcExtrudedAreaSolid(doc);
doc.AddEntity(geom);
geoms.Add(geom);
}
else if (op is Lamina)
{
var lamina = (Lamina)op;
var geom = lamina.ToIfcShellBasedSurfaceModel(doc);
doc.AddEntity(geom);
geoms.Add(geom);
}
else
{
throw new Exception("Only IExtrude, ISweepAlongCurve, and ILamina representations are currently supported.");
}
}
shape = ToIfcProductDefinitionShape(geoms, "SolidModel", context, doc);
}
doc.AddEntity(shape);
// Can we use IfcMappedItem?
// https://forums.buildingsmart.org/t/can-tessellation-typed-representation-hold-items-from-another-group/1621
// var rep = new IfcShapeRepresentation(context, "Body", "Solids", geoms);
// doc.AddEntity(rep);
// var axisPt = Vector3.Origin.ToIfcCartesianPoint();
// doc.AddEntity(axisPt);
// var axis = new IfcAxis2Placement2D(axisPt);
// doc.AddEntity(axis);
// var repMap = new IfcRepresentationMap(new IfcAxis2Placement(axis), rep);
// doc.AddEntity(repMap);
// var x = trans.XAxis.ToIfcDirection();
// var y = trans.YAxis.ToIfcDirection();
// var z = trans.ZAxis.ToIfcDirection();
// var origin = trans.Origin.ToIfcCartesianPoint();
// var cart = new IfcCartesianTransformationOperator3D(x, y, origin, trans.XAxis.Length(), z);
// doc.AddEntity(x);
// doc.AddEntity(y);
// doc.AddEntity(z);
// doc.AddEntity(origin);
// doc.AddEntity(cart);
// var mappedItem = new IfcMappedItem(repMap, cart);
// doc.AddEntity(mappedItem);
// var shapeRep= new IfcShapeRepresentation(context, new List<IfcRepresentationItem>(){mappedItem});
// doc.AddEntity(shapeRep);
// shape = new IfcProductDefinitionShape(new List<IfcRepresentation>(){shapeRep});
// doc.AddEntity(shape);
var product = ConvertElementToIfcProduct(id, geoElement, localPlacement, shape);
products.Add(product);
doc.AddEntity(product);
var ifcOpenings = doc.AllEntities.Where(ent => ent.GetType() == typeof(IfcOpeningElement)).Cast <IfcOpeningElement>();
// If the element has openings, make opening relationships in
// the IfcElement.
if (e is IHasOpenings)
{
var openings = (IHasOpenings)e;
if (openings.Openings.Count > 0)
{
foreach (var o in openings.Openings)
{
var element = (IfcElement)product;
// TODO: Find the opening that we've already created that relates here
var opening = ifcOpenings.First(ifcO => ifcO.GlobalId == IfcGuid.ToIfcGuid(o.Id));
var voidRel = new IfcRelVoidsElement(IfcGuid.ToIfcGuid(Guid.NewGuid()), element, opening);
element.HasOpenings.Add(voidRel);
doc.AddEntity(voidRel);
}
}
}
foreach (var geom in geoms)
{
var styledItem = new IfcStyledItem(geom, styleAssignments[geoElement.Material.Id], null);
doc.AddEntity(styledItem);
}
return(products);
}
private static List <IfcProduct> ToIfcProducts(this Element e, IfcRepresentationContext context, Document doc)
{
var products = new List <IfcProduct>();
if (e is IAggregateElements)
{
// TODO: Create the IFC aggregation relationship
foreach (var subEl in ((IAggregateElements)e).Elements)
{
products.AddRange(subEl.ToIfcProducts(context, doc));
}
return(products);
}
IfcProductDefinitionShape shape = null;
var localPlacement = e.Transform.ToIfcLocalPlacement(doc);
IfcGeometricRepresentationItem geom = null;
if (e is ISweepAlongCurve)
{
var sweep = (ISweepAlongCurve)e;
geom = sweep.ToIfcSurfaceCurveSweptAreaSolid(e.Transform, doc);
}
else if (e is IExtrude)
{
var extrude = (IExtrude)e;
geom = extrude.ToIfcExtrudedAreaSolid(e.Transform, doc);
}
else if (e is ILamina)
{
var lamina = (ILamina)e;
geom = lamina.ToIfcShellBasedSurfaceModel(e.Transform, doc);
}
else
{
throw new Exception("Only IExtrude, ISweepAlongCurve, and ILamina representations are currently supported.");
}
shape = ToIfcProductDefinitionShape(geom, context, doc);
doc.AddEntity(shape);
doc.AddEntity(localPlacement);
doc.AddEntity(geom);
var product = ConvertElementToIfcProduct(e, localPlacement, shape);
products.Add(product);
doc.AddEntity(product);
// If the element has openings,
// Make opening relationships in
// the IfcElement.
if (e is IHasOpenings)
{
var openings = (IHasOpenings)e;
if (openings.Openings.Count > 0)
{
foreach (var o in openings.Openings)
{
var element = (IfcElement)product;
var opening = o.ToIfcOpeningElement(context, doc, localPlacement);
var voidRel = new IfcRelVoidsElement(IfcGuid.ToIfcGuid(Guid.NewGuid()), null, element, opening);
element.HasOpenings.Add(voidRel);
doc.AddEntity(opening);
doc.AddEntity(voidRel);
}
}
}
IfcStyledItem style = null;
if (e is IMaterial)
{
var m = (IMaterial)e;
style = m.Material.ToIfcStyledItem(geom, doc);
}
if (e is IElementType <StructuralFramingType> )
{
var m = (IElementType <StructuralFramingType>)e;
style = m.ElementType.Material.ToIfcStyledItem(geom, doc);
}
else if (e is IElementType <WallType> )
{
var m = (IElementType <WallType>)e;
style = m.ElementType.MaterialLayers[0].Material.ToIfcStyledItem(geom, doc);
}
else if (e is IElementType <FloorType> )
{
var m = (IElementType <FloorType>)e;
style = m.ElementType.MaterialLayers[0].Material.ToIfcStyledItem(geom, doc);
}
// Associate the style with the element
style.Item = geom;
geom.StyledByItem = new List <IfcStyledItem> {
style
};
doc.AddEntity(style);
return(products);
}
