Class TIfcVirtualGridIntersection
Unit
Declaration
type TIfcVirtualGridIntersection = class(TIfcPersistent)
Description
Derived location of the intersection between two grid axes.
Spec: https://standards.buildingsmart.org/IFC/RELEASE/IFC4_3/HTML/lexical/IfcVirtualGridIntersection.htm
Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 3135).
Hierarchy
- TObject
- TPersistent
- TComponent
- TIfcPersistent
- TIfcVirtualGridIntersection
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 IntersectingAxes: TIfcGridAxisList read FIntersectingAxes; |
| Published | property OffsetDistances: TCastleVector3PersistentSimple read FOffsetDistances; |
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. | |
| Public | constructor Create(AOwner: TComponent); override; |
|
This item has no description. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 3140). | |
| Public | destructor Destroy; override; |
|
This item has no description. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 3141). | |
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 IntersectingAxes: TIfcGridAxisList read FIntersectingAxes; |
|
Two grid axes which intersects at exactly one intersection. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 3144). | |
| Published | property OffsetDistances: TCastleVector3PersistentSimple read FOffsetDistances; |
|
Offset distances to the grid axes. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 3147). | |
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