Class TIfcConversionBasedUnitWithOffset
Unit
Declaration
type TIfcConversionBasedUnitWithOffset = class(TIfcConversionBasedUnit)
Description
Unit which is converted from another unit by applying a conversion factor and an offset.
Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 4769).
Hierarchy
- TObject
- TPersistent
- TComponent
- TIfcPersistent
- TIfcUnit
- TIfcNamedUnit
- TIfcConversionBasedUnit
- TIfcConversionBasedUnitWithOffset
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 Dimensions: TIfcDimensionalExponents read FDimensions write FDimensions; |
| Published | property UnitType: TIfcUnitEnum read FUnitType write FUnitType default TIfcUnitEnum.UserDefined; |
| Published | property Name: TIfcLabel read FName write FName; |
| Published | property ConversionFactor: TIfcMeasureWithUnit read FConversionFactor write FConversionFactor; |
| Published | property HasExternalReference: TIfcExternalReferenceRelationshipList read FHasExternalReference; |
| Published | property ConversionOffset: TIfcReal read FConversionOffset write FConversionOffset; |
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 4752). | |
| Public | destructor Destroy; override; |
|
This item has no description. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 4753). | |
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 Dimensions: TIfcDimensionalExponents read FDimensions write FDimensions; |
|
Dimensional exponents of the SI base units by which the named unit is defined. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 4644). | |
| Published | property UnitType: TIfcUnitEnum read FUnitType write FUnitType default TIfcUnitEnum.UserDefined; |
|
The type of the unit. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 4647). | |
| Published | property Name: TIfcLabel read FName write FName; |
|
Word, or group of words, by which the conversion based unit is referred to. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 4756). | |
| Published | property ConversionFactor: TIfcMeasureWithUnit read FConversionFactor write FConversionFactor; |
|
The physical quantity from which the converted unit is derived. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 4759). | |
| Published | property HasExternalReference: TIfcExternalReferenceRelationshipList read FHasExternalReference; |
|
Reference to external information, e.g. library, classification, or document information, which is associated with the conversion-based unit. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 4763). | |
| Published | property ConversionOffset: TIfcReal read FConversionOffset write FConversionOffset; |
|
A positive or negative offset to add after the inherited ConversionFactor was applied. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 4775). | |
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