Class TIfcBooleanClippingResult
Unit
Declaration
type TIfcBooleanClippingResult = class(TIfcBooleanResult)
Description
Constrained version of TIfcBooleanResult. A clipping result is the Boolean difference between a swept solid and a half space solid, or between the result of the Boolean difference and a half space solid. Hence more than one difference operation can be applied to achieve the final Boolean result.
Spec: https://standards.buildingsmart.org/IFC/RELEASE/IFC4_3/HTML/lexical/IfcBooleanClippingResult.htm
Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 496).
Hierarchy
- TObject
- TPersistent
- TComponent
- TIfcPersistent
- TIfcRepresentationItem
- TIfcGeometricRepresentationItem
- TIfcBooleanResult
- TIfcBooleanClippingResult
Overview
Methods
| Protected | function WantsGlobalId: Boolean; virtual; |
| Protected | class function IfcClassName: String; virtual; |
| Public | function BuildNode(const Mapping: TCastleIfcMapping; const ParentProduct: TIfcProduct; const LitAppearance, UnlitAppearance: TAppearanceNode): TAbstractChildNode; override; |
Properties
| Published | property GlobalId: String read FGlobalId write FGlobalId; |
| Published | property LayerAssignment: TIfcPresentationLayerAssignment read FLayerAssignment write FLayerAssignment; |
| Published | property StyledByItem: TIfcStyledItem read FStyledByItem write FStyledByItem; |
| Published | property Operator: TIfcBooleanOperator read FOperator write FOperator; |
| Published | property FirstOperand: TIfcBooleanOperand read FFirstOperand write FFirstOperand; |
| Published | property SecondOperand: TIfcBooleanOperand read FSecondOperand write FSecondOperand; |
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 | function BuildNode(const Mapping: TCastleIfcMapping; const ParentProduct: TIfcProduct; const LitAppearance, UnlitAppearance: TAppearanceNode): TAbstractChildNode; override; |
|
This item is declared in ancestor TIfcBooleanResult. This item has no description. Showing description inherited from TIfcRepresentationItem.BuildNode.
Build a node to display this using Castle Game Engine. Returns
Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 474). | |
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 LayerAssignment: TIfcPresentationLayerAssignment read FLayerAssignment write FLayerAssignment; |
|
This item is declared in ancestor TIfcRepresentationItem.
Assignment of the representation item to a single or multiple layer(s). Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 374). | |
| Published | property StyledByItem: TIfcStyledItem read FStyledByItem write FStyledByItem; |
|
This item is declared in ancestor TIfcRepresentationItem.
Reference to the IfcStyledItem that provides presentation information to the representation, e.g. a curve style, including colour and thickness to a geometric curve. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 380). | |
| Published | property Operator: TIfcBooleanOperator read FOperator write FOperator; |
|
This item is declared in ancestor TIfcBooleanResult. Boolean operator used in the operation to create the result. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 479). | |
| Published | property FirstOperand: TIfcBooleanOperand read FFirstOperand write FFirstOperand; |
|
This item is declared in ancestor TIfcBooleanResult. The first operand of the Boolean operation. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 482). | |
| Published | property SecondOperand: TIfcBooleanOperand read FSecondOperand write FSecondOperand; |
|
This item is declared in ancestor TIfcBooleanResult. The second operand of the Boolean operation. Source: scene/load/ifc/castleifc_ifc_standard_types.inc (line 485). | |
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