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karamba3d / K3D_NightlyBuilds

Nightly build versions of Karamba3d
https://karamba3d.com
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BUG: Nodal Displacements not available for Natural Vibrations #26

Closed lucasepp closed 3 years ago

lucasepp commented 3 years ago

Description In previous Karamba versions, if used after a Natural Vibrations component, the Nodal Displacements component would output the unity-normalized eigenvectors.

In recent nightly builds the Nodal Displacements component now throws an error: image

To Reproduce See attached simple .gh script. eigenvector extraction.zip

Clemens-Preisinger commented 3 years ago

Thanks for the bug report. In Karamba3D 1.3.3 all load-cases - including eigen-, vibration- and buckling modes - were indexed by numbers. In version 2.0.0 load-cases are named using strings which has led to backward compatibility problems like the one you encountered. A quick work-around would be to use 'VibeMode_#0' to reference the first vibration mode (see attached file: eigenvector.extraction.zip). In future releases of Karamba3D it is planned to have more flexibility with regards to handling load-cases, so that results from natural vibration calculations can exist alongside results from external loads in the same model. This would make it possible to e.g. perform a spectral analysis. That's the reason for moving from indices to strings for referring to load-cases. -- Clemens

lucasepp commented 3 years ago

Perfect - I figured it was something to do with the move from pure load cases to having result cases etc, but didn't know the format you had used for the load-case strings for natural vibrations. Would perhaps be a good idea if the deconstruct model component or similar would spit out a list of resulting load cases for transparency to the user? Or some other UI approach for showing this. Thanks! Lucas