Class TIfcRepresentationContext
Unit
Declaration
type TIfcRepresentationContext = class(TIfcPersistent)
Description
Context to which the IfcRepresentation of a product is related.
Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 4779).
Hierarchy
- TObject
- TPersistent
- TComponent
- TIfcPersistent
- TIfcRepresentationContext
Overview
Methods
| Protected | function WantsGlobalId: Boolean; virtual; |
| Protected | class function IfcClassName: String; virtual; |
| Public | constructor Create(AOwner: TComponent); override; |
| Public | destructor Destroy; override; |
Properties
| Published | property GlobalId: String read FGlobalId write FGlobalId; |
| Published | property ContextIdentifier: TIfcLabel read FContextIdentifier write FContextIdentifier; |
| Published | property ContextType: TIfcLabel read FContextType write FContextType; |
| Published | property RepresentationsInContext: TIfcRepresentationList read FRepresentationsInContext; |
Description
Methods
| Protected | function WantsGlobalId: Boolean; virtual; |
|
This item is declared in ancestor TIfcPersistent.
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 | |
| 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. | |
| Public | constructor Create(AOwner: TComponent); override; |
|
This item has no description. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 4785). | |
| Public | destructor Destroy; override; |
|
This item has no description. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 4786). | |
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 ContextIdentifier: TIfcLabel read FContextIdentifier write FContextIdentifier; |
|
The optional identifier of the representation context as used within a project. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 4789). | |
| Published | property ContextType: TIfcLabel read FContextType write FContextType; |
|
The description of the type of a representation context. The supported values for context type are to be specified by implementers agreements. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 4793). | |
| Published | property RepresentationsInContext: TIfcRepresentationList read FRepresentationsInContext; |
|
All shape representations that are defined in the same representation context. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 4796). | |
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