Class TIfcDimensionalExponents
Unit
Declaration
type TIfcDimensionalExponents = class(TIfcPersistent)
Description
The dimensionality of any quantity can be expressed as a product of powers of the dimensions of base quantities. The dimensional exponents entity defines the powers of the dimensions of the base quantities. All the physical quantities are founded on seven base quantities (ISO 31 (clause 2)).
Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 4582).
Hierarchy
- TObject
- TPersistent
- TComponent
- TIfcPersistent
- TIfcDimensionalExponents
Overview
Methods
| Protected | function WantsGlobalId: Boolean; virtual; |
| Protected | class function IfcClassName: String; virtual; |
Properties
| Published | property GlobalId: String read FGlobalId write FGlobalId; |
| Published | property LengthExponent: Integer read FLengthExponent write FLengthExponent default 0; |
| Published | property MassExponent: Integer read FMassExponent write FMassExponent default 0; |
| Published | property TimeExponent: Integer read FTimeExponent write FTimeExponent default 0; |
| Published | property ElectricCurrentExponent: Integer read FElectricCurrentExponent write FElectricCurrentExponent default 0; |
| Published | property ThermodynamicTemperatureExponent: Integer read FThermodynamicTemperatureExponent write FThermodynamicTemperatureExponent default 0; |
| Published | property AmountOfSubstanceExponent: Integer read FAmountOfSubstanceExponent write FAmountOfSubstanceExponent default 0; |
| Published | property LuminousIntensityExponent: Integer read FLuminousIntensityExponent write FLuminousIntensityExponent default 0; |
Description
Methods
| Protected | function WantsGlobalId: Boolean; virtual; |
|
This item is declared in ancestor TIfcPersistent.
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; |
|
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. | |
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 IFC JSON documentation says this, which seems to (unfortunately it is not unambiguous enough...) allow this at any IFC class: "Whereas the | |
| Published | property LengthExponent: Integer read FLengthExponent write FLengthExponent default 0; |
|
This item has no description. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 4592). | |
| Published | property MassExponent: Integer read FMassExponent write FMassExponent default 0; |
|
This item has no description. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 4593). | |
| Published | property TimeExponent: Integer read FTimeExponent write FTimeExponent default 0; |
|
This item has no description. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 4594). | |
| Published | property ElectricCurrentExponent: Integer read FElectricCurrentExponent write FElectricCurrentExponent default 0; |
|
This item has no description. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 4595). | |
| Published | property ThermodynamicTemperatureExponent: Integer read FThermodynamicTemperatureExponent write FThermodynamicTemperatureExponent default 0; |
|
This item has no description. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 4596). | |
| Published | property AmountOfSubstanceExponent: Integer read FAmountOfSubstanceExponent write FAmountOfSubstanceExponent default 0; |
|
This item has no description. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 4597). | |
| Published | property LuminousIntensityExponent: Integer read FLuminousIntensityExponent write FLuminousIntensityExponent default 0; |
|
This item has no description. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 4598). | |
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