Class TIfcMaterialDefinition
Unit
Declaration
type TIfcMaterialDefinition = class abstract(TIfcMaterialSelect)
Description
General supertype for all material related information items in IFC that have common material related properties that may include association of material with some shape parameters or assignments to identified parts of a component.
Spec: https://standards.buildingsmart.org/IFC/RELEASE/IFC4_3/HTML/lexical/IfcMaterialDefinition.htm
Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 5445).
Hierarchy
- TObject
- TPersistent
- TComponent
- TIfcPersistent
- TIfcMaterialSelect
- TIfcMaterialDefinition
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; |
| Published | property HasExternalReferences: TIfcExternalReferenceRelationshipList read FHasExternalReferences; |
| Published | property HasProperties: TIfcMaterialPropertiesList read FHasProperties; |
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 5451). | |
| Public | destructor Destroy; override; |
|
This item has no description. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 5452). | |
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 IfcMaterialDefinition subtypes within the material association of an element occurrence or element type. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 5456). | |
| Published | property HasExternalReferences: TIfcExternalReferenceRelationshipList read FHasExternalReferences; |
|
Reference to external references, e.g. library, classification, or document information, that are associated to the material. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 5460). | |
| Published | property HasProperties: TIfcMaterialPropertiesList read FHasProperties; |
|
Material properties assigned to instances of subtypes of IfcMaterialDefinition. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 5463). | |
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