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I have some geometry made up of quads and I want to select the upper left face corner of each face. Up as in +Z in world space and left relative to the face normal if that makes sense. Is this possible? or something similar?

To add some more information, the geometry is not made procedurally. It's modeled by me. I want to alter it using geometry nodes and I've found that the face corners have seemingly random indices so I can't rely on corner index 0 being in the same place on each quad.

I have some geometry made up of quads and I want to select the upper left face corner of each face. Up as in +Z in world space and left relative to the face normal if that makes sense. Is this possible? or something similar?

I have some geometry made up of quads and I want to select the upper left face corner of each face. Up as in +Z in world space and left relative to the face normal if that makes sense. Is this possible? or something similar?

To add some more information, the geometry is not made procedurally. It's modeled by me. I want to alter it using geometry nodes and I've found that the face corners have seemingly random indices so I can't rely on corner index 0 being in the same place on each quad.

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Is it possible to get the index of the top left face corner for each quad in a mesh in geometry nodes?

I have some geometry made up of quads and I want to select the upper left face corner of each face. Up as in +Z in world space and left relative to the face normal if that makes sense. Is this possible? or something similar?