[Bug]: Attribute is derived subtype.

[RyugaRyuzaki]

What happened?

When i try to create IfcGeometricRepresentationSubContext :

this.IfcGeometricRepresentationSubContext1 =
      new IFC4X3.IfcGeometricRepresentationSubContext(
        new IFC.IfcLabel("Axis"),
        new IFC.IfcLabel("Model"),
        this.IfcAxis2PlacementGlobal3D,
        this.IfcGeometricRepresentationContext,
        new IFC.IfcPositiveRatioMeasure(1e-3),
        IFC.IfcGeometricProjectionEnum.GRAPH_VIEW,
        new IFC.IfcLabel("")
      );

Then i checked from here https://validate.buildingsmart.org/dashboard It threw this error

Version

0.0.54

What browsers are you seeing the problem on?

No response

Relevant log output

null

Anything else?

null

[RyugaRyuzaki]

From snippet :

constructor IFC4X3.IfcSIUnit(
Dimensions: (Handle<IFC.IfcDimensionalExponents> | IFC.IfcDimensionalExponents),
 UnitType: IFC.IfcUnitEnum, 
Prefix: IFC.IfcSIPrefix | null, 
Name: IFC.IfcSIUnitName): IFC.IfcSIUnit

So i follow

 IfcDimensionalExponents: IFC.IfcDimensionalExponents =
    new IFC.IfcDimensionalExponents(1, 1, 1, 1, 1, 1, 1);
  IfcLengthUnit: IFC.IfcSIUnit = new IFC.IfcSIUnit(
    this.IfcDimensionalExponents,
    IFC.IfcUnitEnum.LENGTHUNIT,
    "",
    IFC.IfcSIUnitName.METRE
  );

And result

#19= IFCSIUNIT(#18,.LENGTHUNIT.,$,.METRE.);

Expected :

#19= IFCSIUNIT(*,.LENGTHUNIT.,$,.METRE.);

The problem "*" instead "#18".

[beachtom]

Can you share the full code for writing it?

[RyugaRyuzaki]

Can you share the full code for writing it?

@beachtom to define and to export and to writeline

[beachtom]

This is fixed!

[RyugaRyuzaki]

This is fixed!

Ops! @beachtom it's still error! Result :

#88=IFCSIUNIT(.LENGTHUNIT.,'',.MILLI.,$);

Expected :

#88=IFCSIUNIT(*,.LENGTHUNIT.,'',.MILLI.,$);

[beachtom]

Did you test with the code here - new version hasn't been released yet? In any case I will double check

[RyugaRyuzaki]

Did you test with the code here - new version hasn't been released yet? In any case I will double check

yes. i downloaded build.zip then i followed this

    class IfcSIUnit extends IfcNamedUnit {
        UnitType: IfcUnitEnum;
        Prefix: IfcSIPrefix | null;
        Name: IfcSIUnitName;
        type: number;
        constructor(UnitType: IfcUnitEnum, Prefix: IfcSIPrefix | null, Name: IfcSIUnitName);
    }

And output

#88=IFCSIUNIT(.LENGTHUNIT.,'',.MILLI.,$);

[JakeOShannessy]

I think I may be hitting the same or a similar issue with 0.0.61. In the below code I'm writing a minimal IFC file with just a single instance of IfcSIUnit. It outputs the line #1=IFCSIUNIT(#0,.LENGTHUNIT.,$,.METRE.); rather than the expects #1=IFCSIUNIT(*,.LENGTHUNIT.,$,.METRE.);. My understanding is that the first parameter should be '*' as that is now derived.

Code used to reproduce the issue:

import WebIFC from "web-ifc";
import * as fs from "fs";

const ifcApi = new WebIFC.IfcAPI();
await ifcApi.Init();
const newIfcModel = {
    schema: WebIFC.Schemas.IFC4,
    name: `Test Project`,
}
const modelId = ifcApi.CreateModel(newIfcModel);
const metres = new WebIFC.IFC4.IfcSIUnit(
    WebIFC.IFC4.IfcUnitEnum.LENGTHUNIT,
    null,
    WebIFC.IFC4.IfcSIUnitName.METRE
);
ifcApi.WriteLine(
    modelId,
    metres,
);
fs.writeFileSync('test.ifc', ifcApi.SaveModel(modelId));
ifcApi.CloseModel(modelId);

Output:

ISO-10303-21;
HEADER;
/******************************************************
* STEP Physical File produced by: That Open Engine WebIfc 0.0.61
* Module: web-ifc/IfcLoader
* Version: 0.0.61
* Source: https://github.com/ThatOpen/engine_web-ifc
* Issues: https://github.com/ThatOpen/engine_web-ifc/issues
******************************************************/
FILE_DESCRIPTION(('ViewDefinition [CoordinationView]'),'2;1');
FILE_NAME('Test Project','2024-11-11T10:58:51',($),($),'thatopen/web-ifc-api','thatopen/web-ifc-api',$);
FILE_SCHEMA(('IFC4'));
ENDSEC;
DATA;
#1=IFCSIUNIT(#0,.LENGTHUNIT.,$,.METRE.);
ENDSEC;
END-ISO-10303-21;

[JakeOShannessy]

This has resolved the bug for me.