Retrieving mesh indices, sign/unsigned ?

[Nicholas Yue]

Hi,

  In the mesh, calling

        Alembic::AbcGeom::Int32ArraySamplePtr face_indices = samp.getFaceIndices();

  returns a

      Int32ArraySamplePtr

  whereas in GeomParm, I get unsigned integer array

        Alembic::AbcGeom::IN3fGeomParam normalsParams = schema.getNormalsParam();
        Alembic::AbcGeom::IN3fGeomParam::Sample normalsValue = normalsParams.getIndexedValue();
        Alembic::AbcGeom::UInt32ArraySamplePtr indices = normalsValue.getIndices();

  Am I retrieving the wrong indices ?

  I am trying to build an OBJ file after reading an Alembic file

Cheers
--

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

[Lucas Miller]

face indices and face counts make up the topology of the mesh.

It was most likely signed for historical reasons.

GeomParams are a little bit different in that if they are indexed their indices are in reference to their own values

Lucas

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