Protected	`function WantsGlobalId: Boolean; virtual;`
Protected	`class function IfcClassName: String; virtual;`
Public	`procedure UpdateCrossSection(const CrossSection: TVector2List; var CrossSectionConvex: Boolean; const ParentName: String); virtual;`
Public	`constructor Create(AOwner: TComponent); override;`
Public	`destructor Destroy; override;`

Properties

Published	`property GlobalId: String read FGlobalId write FGlobalId;`
Published	`property ProfileType: TIfcProfileTypeEnum read FProfileType write FProfileType;`
Published	`property ProfileName: TIfcLabel read FProfileName write FProfileName;`
Published	`property HasExternalReference: TIfcExternalReferenceRelationshipList read FHasExternalReference;`
Published	`property HasProperties: TIfcProfilePropertiesList read FHasProperties;`
Published	`property Profiles: TIfcProfileDefList read FProfiles;`
Published	`property Label: TIfcLabel read FLabel write FLabel;`

Description

Methods

Protected function WantsGlobalId: Boolean; virtual;

This item is declared in ancestor TIfcPersistent.

If True, instances of this class will have GlobalId auto-assigned at saving, and they will be saved as part of the "data" list in IFC JSON files.

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 WantsGlobalId = True to save some files.

Source: scene/load/ifc/castleifc_ifc_types.inc (line 52).

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.

Source: scene/load/ifc/castleifc_ifc_types.inc (line 56).

Public procedure UpdateCrossSection(const CrossSection: TVector2List; var CrossSectionConvex: Boolean; const ParentName: String); virtual;

This item is declared in ancestor TIfcProfileDef.

Update CrossSection to be used by IfcExtrudedAreaSolid. In the base class, this makes a warning "not implemented". Override (and do not call "inherited") to provide a useful implementation.

Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 1220).

Public constructor Create(AOwner: TComponent); override;

This item has no description.

Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 1246).

Public destructor Destroy; override;

This item has no description.

Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 1247).

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 GlobalId to be successfully saved (avoid recursively trying to serialize it) in some cases. We indicate such classes with WantsGlobalId.

IFC JSON documentation says this, which seems to (unfortunately it is not unambiguous enough...) allow this at any IFC class: "Whereas the globalId attribute is only available to those elements that are descendent of the IfcRoot entity in the EXPRESS schema, we encourage a broader use of this globalId, to enable referencing between objects in a JSON file when useful.".

Source: scene/load/ifc/castleifc_ifc_types.inc (line 79).

Published property ProfileType: TIfcProfileTypeEnum read FProfileType write FProfileType;

This item is declared in ancestor TIfcProfileDef.

Type of geometry into which this profile definition shall be resolved.

Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 1224).

Published property ProfileName: TIfcLabel read FProfileName write FProfileName;

This item is declared in ancestor TIfcProfileDef.

Human-readable name of the profile.

Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 1227).

Published property HasExternalReference: TIfcExternalReferenceRelationshipList read FHasExternalReference;

This item is declared in ancestor TIfcProfileDef.

Reference to external information, e.g. library, classification, or document information, which is associated with the profile.