I am currently working on a civil 3D plugin in .NET C# that trims the Gridsurface to a specified elevation. This plugin can be utilized either under Dynamo or as a new command within Civil 3D. The Gridsurface is generated from a DEM text file. I have several options to consider for accessing and manipulating the data, and I would greatly appreciate your insights and recommendations. Here are the approaches I am considering:
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Modifying the vertex collection directly by accessing and manipulating its data.
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Extracting the vertex data, exporting it to a new text file (or utilizing in-memory storage), performing the required modifications, and then importing it back as a new Gridsurface.
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Working with the cells collection, applying similar steps as mentioned above.
If possible, I would highly appreciate any advice, suggestions, or code snippets based on your experience in this field.