Class TIfcMaterialLayer
Unit
Declaration
type TIfcMaterialLayer = class(TIfcMaterialDefinition)
Description
Single and identifiable part of an element which is constructed of a number of layers (one or more).
Spec: https://standards.buildingsmart.org/IFC/RELEASE/IFC4_3/HTML/lexical/IfcMaterialLayer.htm
Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 5675).
Hierarchy
- TObject
- TPersistent
- TComponent
- TIfcPersistent
- TIfcMaterialSelect
- TIfcMaterialDefinition
- TIfcMaterialLayer
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; |
| Published | property Material: TIfcMaterial read FMaterial write FMaterial; |
| Published | property LayerThickness: TIfcNonNegativeLengthMeasure read FLayerThickness write FLayerThickness; |
| Published | property IsVentilated: TIfcLogical read FIsVentilated write FIsVentilated default false; |
| Published | property Name: TIfcLabel read FName write FName; |
| Published | property Description: TIfcText read FDescription write FDescription; |
| Published | property Category: TIfcLabel read FCategory write FCategory; |
| Published | property Priority: Integer read FPriority write FPriority default 0; |
| Published | property ToMaterialLayerSet: TIfcMaterialLayerSet read FToMaterialLayerSet write FToMaterialLayerSet; |
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). | |
| Published | property Material: TIfcMaterial read FMaterial write FMaterial; |
|
Optional reference to the material from which the layer is constructed. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 5687). | |
| Published | property LayerThickness: TIfcNonNegativeLengthMeasure read FLayerThickness write FLayerThickness; |
|
The thickness of the material layer. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 5690). | |
| Published | property IsVentilated: TIfcLogical read FIsVentilated write FIsVentilated default false; |
|
Indication of whether the material layer represents an air layer (or cavity). TODO: IFC specification says this is OPTIONAL, and default is "unknown", so maybe this should be an enum with 3 values in Pascal? Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 5696). | |
| Published | property Name: TIfcLabel read FName write FName; |
|
The name by which the material layer is known. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 5699). | |
| Published | property Description: TIfcText read FDescription write FDescription; |
|
Definition of the material layer in more descriptive terms than given by attributes Name or Category. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 5702). | |
| Published | property Category: TIfcLabel read FCategory write FCategory; |
|
Category of the material layer, e.g. the role it has in the layer set it belongs to. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 5705). | |
| Published | property Priority: Integer read FPriority write FPriority default 0; |
|
The relative priority of the layer, expressed as normalised integer range [0..100]. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 5708). | |
| Published | property ToMaterialLayerSet: TIfcMaterialLayerSet read FToMaterialLayerSet write FToMaterialLayerSet; |
|
Reference to the IfcMaterialLayerSet in which the material layer is included. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 5711). | |
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