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
Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 850).
Hierarchy
- TObject
- TPersistent
- TComponent
- TIfcPersistent
- TIfcRepresentationItem
- TIfcGeometricRepresentationItem
- TIfcTessellatedItem
- TIfcTessellatedFaceSet
- TIfcPolygonalFaceSet
Overview
Methods
| Protected | class function IfcClassName: String; virtual; |
| Protected | function WantsGlobalId: Boolean; override; |
| Public | constructor Create(AOwner: TComponent); override; |
| Public | destructor Destroy; override; |
| Public | function BuildNode(const Mapping: TCastleIfcMapping; const ParentProduct: TIfcProduct; const LitAppearance, UnlitAppearance: TAppearanceNode): TAbstractChildNode; override; |
Properties
| Published | property GlobalId: String read FGlobalId write FGlobalId; |
| Published | property LayerAssignment: TIfcPresentationLayerAssignmentList
read FLayerAssignment; |
| Published | property StyledByItem: TIfcStyledItem read FStyledByItem write FStyledByItem; |
| Published | property Coordinates: TIfcCartesianPointList3D read FCoordinates write FCoordinates; |
| Published | property HasColours: TIfcIndexedColourMap read FHasColours write FHasColours; |
| Published | property HasTextures: TIfcIndexedTextureMapList read FHasTextures; |
| Published | property Closed: Boolean read FClosed write FClosed default false; |
| Published | property Faces: TIfcIndexedPolygonalFaceList read FFaces; |
| Published | property PnIndex: TIntegerList read FPnIndex; |
Description
Methods
| Protected | class function IfcClassName: String; virtual; |
|
This item is declared in ancestor TIfcPersistent. Name for the IFC standard, used in IFC files. By default, this is just ClassName with prefix 'T' removed. | |
| Protected | function WantsGlobalId: Boolean; override; |
|
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 Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 856). | |
| Public | constructor Create(AOwner: TComponent); override; |
|
This item has no description. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 858). | |
| Public | destructor Destroy; override; |
|
This item has no description. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 859). | |
| Public | function BuildNode(const Mapping: TCastleIfcMapping; const ParentProduct: TIfcProduct; const LitAppearance, UnlitAppearance: TAppearanceNode): TAbstractChildNode; override; |
|
This item has no description. Showing description inherited from TIfcRepresentationItem.BuildNode.
Build a node to display this using Castle Game Engine. Returns
Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 860). | |
Properties
| Published | property GlobalId: String read FGlobalId write FGlobalId; |
|
This item is declared in ancestor TIfcPersistent. Globally unique identifier for the object instance. Note: Not declared as TGUID, because TGUID cannot be published, but also we don't really need it: for our purposes, this identifier is just an arbitrary string. Note: IFC 4.3 specification puts this only at IfcRoot, not at every IFC class. But testcase https://github.com/buildingsmart-community/Community-Sample-Test-Files/blob/main/IFC%204.0.2.1%20(IFC%204)/ISO%20Spec%20archive/wall-with-opening-and-window.json (from IFC 4.0) shows this can be present at any IFC class, in particular TIfcGeometricRepresentationContext. In fact, TIfcGeometricRepresentationContext needs to have IFC JSON documentation says this, which seems to (unfortunately it is not unambiguous enough...) allow this at any IFC class: "Whereas the | |
| Published | property LayerAssignment: TIfcPresentationLayerAssignmentList
read FLayerAssignment; |
|
This item is declared in ancestor TIfcTessellatedItem. Assignment of the representation item to a single or multiple layer(s). Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 541). | |
| Published | property StyledByItem: TIfcStyledItem read FStyledByItem write FStyledByItem; |
|
This item is declared in ancestor TIfcTessellatedItem. Reference to the IfcStyledItem that provides presentation information to the representation, e.g. a curve style, including colour and thickness to a geometric curve. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 547). | |
| Published | property Coordinates: TIfcCartesianPointList3D read FCoordinates write FCoordinates; |
|
This item is declared in ancestor TIfcTessellatedFaceSet. Ordered list of Cartesian points. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 835). | |
| Published | property HasColours: TIfcIndexedColourMap read FHasColours write FHasColours; |
|
This item is declared in ancestor TIfcTessellatedFaceSet. Reference to the indexed colour map providing the corresponding colour RGB values to the faces. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 839). | |
| Published | property HasTextures: TIfcIndexedTextureMapList read FHasTextures; |
|
This item is declared in ancestor TIfcTessellatedFaceSet. Reference to the indexed texture map providing the corresponding texture coordinates to the vertices. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 843). | |
| Published | property Closed: Boolean read FClosed write FClosed default false; |
|
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. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 870). | |
| Published | property Faces: TIfcIndexedPolygonalFaceList read FFaces; |
|
List of polygonal faces. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 873). | |
| Published | property PnIndex: TIntegerList read FPnIndex; |
|
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 Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 879). | |
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