Implement support for pygeo and OM wrapper for custom meshes - #64
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… fixed scale and translate of custom meshes not working
…ng in common block
…fortran layer indexing bugs. runtime mesh updating still needs to be implemented
sabakhshi
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Nice work! Here are a few questions and suggestions
joanibal
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Aug 24, 2026
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This PR includes support for pygeo FFD parameterization in the OVLSolver class and support for dictionary input/custom meshes in the OM wrapper.
The pygeo api is very easy to use. The user just needs to set up their FFD box and their DVGeo object with all design variables set. Then it's just a matter of setting the DVGeo instance to the OVLSolver object using the set_DVGeo function. To apply any changes made to the DVGeo design variables to the OptVL mesh the update_DVGeo function needs to be called. This will embed any mesh surfaces in the FFD if needed and then perform the pointset update. The updated point set will then be set back into OptVL and the and update surfaces routine called to update the Fortran layer. Currently, OptVL will try to embed all meshes into the same FFD so for now we suggest that FFDs only be used with cases that only have a single mesh surface. A unit test is included for the pyGeo API. A FFD box generator for VLM meshes is also included in utilities.
The OM wrapper can also now be used with meshes and input dictionaries. When a mesh is used for a particular surface all geometry inputs for that surfaces are replaced with a single mesh input. The shape of this mesh input is set by the input_mesh_shape option in the OVLGroup class. Input arrays shapes of 1,2, or 3 dimensions can be chosen with it defaulting to 1 (which is a flat array). This input shape selection allows for wide compatibility with a variety of geometry parameterization components. A unit test for the mesh features in the OM wrapper are also included.