Class TIfcPolygonalFaceSet
Unit
Declaration
type TIfcPolygonalFaceSet = class(TIfcTessellatedFaceSet)
Description
Tessellated face set with all faces being bound by polygons. This is what is most commonly referred to as "a mesh" in 3D.
Spec: https://standards.buildingsmart.org/IFC/RELEASE/IFC4_3/HTML/lexical/IfcPolygonalFaceSet.htm
Hierarchy
- TObject
- TPersistent
- TComponent
- TIfcPersistent
- TIfcRepresentationItem
- TIfcGeometricRepresentationItem
- TIfcTessellatedItem
- TIfcTessellatedFaceSet
- TIfcPolygonalFaceSet
Overview
Methods
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function WantsGlobalId: Boolean; override; |
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constructor Create(AOwner: TComponent); override; |
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destructor Destroy; override; |
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function BuildNode(const Mapping: TCastleIfcMapping; const ParentProduct: TIfcProduct; const LitAppearance, UnlitAppearance: TAppearanceNode): TAbstractChildNode; override; |
Properties
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property Closed: Boolean read FClosed write FClosed default false; |
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property Faces: TIfcIndexedPolygonalFaceList read FFaces; |
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property PnIndex: TIntegerList read FPnIndex; |
Description
Methods
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function WantsGlobalId: Boolean; override; |
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This item has no description. Showing description inherited from TIfcPersistent.WantsGlobalId.
If Strictly following the spec, this should be only defined for TIfcRoot, because only IfcRoot has GlobalId. In reality, we need GlobalId at TIfcPersistent to load some files, and we sometimes need | |
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constructor Create(AOwner: TComponent); override; |
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This item has no description. | |
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destructor Destroy; override; |
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This item has no description. | |
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function BuildNode(const Mapping: TCastleIfcMapping; const ParentProduct: TIfcProduct; const LitAppearance, UnlitAppearance: TAppearanceNode): TAbstractChildNode; override; |
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This item has no description. Showing description inherited from TIfcRepresentationItem.BuildNode.
Build a node to display this using Castle Game Engine. Returns
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Properties
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property Closed: Boolean read FClosed write FClosed default false; |
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Indication whether the face set is a closed shell (TRUE) or an open shell (FALSE). IFC spec says: If omitted no such information can be asserted. For our implementation, "no such information can be asserted" means it shall be treated as an open shell, so we don't introduce a 3rd state. | |
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property Faces: TIfcIndexedPolygonalFaceList read FFaces; |
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List of polygonal faces. | |
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property PnIndex: TIntegerList read FPnIndex; |
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The list of integers defining the locations in the IfcCartesianPointList3D to obtain the point coordinates for the indices at the indexed polygonal faces. If the | |
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