Correct way to check if alembic file primitive has UV information

[Nicholas Yue]

Hi,

  The following code always return true so I am certain this is not the correct way to check if a primitive has UV so I'd like to know what is the correct way

```

 Alembic::AbcGeom::IPolyMeshSchema::Sample samp;
if (pmesh.getSchema().getNumSamples() > 0) {
// Geometry face area information
const Alembic::AbcGeom::IPolyMeshSchema &ipms = pmesh.getSchema();
ipms.get(samp);

        Alembic::AbcGeom::IV2fGeomParam uvParams = ipms.getUVsParam();
        size_t extent = uvParams.getArrayExtent();
        size_t sampleCount = uvParams.getNumSamples();
        std::string name = uvParams.getName();
        bool haveUVs = uvParams.valid();
```

Cheers
--

Nicholas Yue
https://www.linkedin.com/in/nicholasyue/

[Lucas Miller]

uvParams was valid?  How many samples did it have?

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[Nicholas Yue]

1 sample

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[Lucas Miller]

The UVs are only created if you provide a sample for them since they are optional so uvParams.valid() has traditionally been the way to check this.

What are you seeing for cases where you think the UVs are NOT valid?

Lucas

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[Nicholas Yue]

Thanks for the heads up. I believe the problem stems from a badly converted Alembic file from a Houdini BGEO file.

I shall follow up with SideEffects in this case.

Thank you.

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