Class TIfcMaterialUsageDefinition
Unit
Declaration
type TIfcMaterialUsageDefinition = class abstract(TIfcPersistent)
Description
eneral supertype for all material related information items in IFC that have occurrence specific assignment parameters to assign a set of materials with shape parameters to a reference geometry item of that component.
Spec: https://standards.buildingsmart.org/IFC/RELEASE/IFC4_3/HTML/lexical/IfcMaterialUsageDefinition.htm
Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 1705).
Hierarchy
- TObject
- TPersistent
- TComponent
- TIfcPersistent
- TIfcMaterialUsageDefinition
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 AssociatedTo: TIfcRelAssociatesMaterialList read FAssociatedTo; |
Description
Methods
| Protected | function WantsGlobalId: Boolean; virtual; |
|
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; |
|
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 1711). | |
| Public | destructor Destroy; override; |
|
This item has no description. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 1712). | |
Properties
| Published | property GlobalId: String read FGlobalId write FGlobalId; |
|
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 AssociatedTo: TIfcRelAssociatesMaterialList read FAssociatedTo; |
|
Use of the IfcMaterialUsageDefinition subtypes within the material association of an element occurrence. The association is established by the IfcRelAssociatesMaterial relationship. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 1718). | |
Generated by PasDoc 0.17.0.snapshot.