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Selecting all horizonal edges

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  • R
    reading-card last edited by Dr. Sassi Mar 3, 2024, 5:58 AM Feb 23, 2024, 5:05 PM

    Is there a way to select all vertical or horizontal edges of a mesh automatically? Similar to this plugin: https://www.youtube.com/watch?v=TnlXdttN8sE to to which newer C4D version are not compatible anymore.

    Here is an example scene which is using ring/loop selection tools on a low poly mesh. But for higher resolution meshes, those tools seems insufficient, unless I missed a feature: https://www.dropbox.com/scl/fi/m8dcl0a7wy10t54urc15g/ring-loop-selections.c4d?rlkey=5gpk4puim2o7rbnp7f1ouy254&dl=0

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    • Dr. Sassi
      Dr. Sassi last edited by Dr. Sassi Feb 23, 2024, 8:30 PM Feb 23, 2024, 8:30 PM

      Hi reading-card,

      Thank you very much for your file. Yes, I understand that these are examples, not the only target.

      I found it from time to time successful, to contact plug-in developers and ask for a newer version. Sometimes, the code needs only a fresh compilation.

      .
      The two ideas that come to mind,

      I would try to get the shape into a better mesh flow than the tools have produced. With a few iterations, the Remesher is often a great way to get cleaner results, which helps with UV and selections and perhaps animations of all kinds.
      Remeshed result of your model
      CV4_2024_drs_24_MOrm_01.c4d

      Besides the standard selections, have you checked out the Pattern Selection?

      https://help.maxon.net/c4d/en-us/?_gl=11svptu6_gcl_au*Njc0MjczNTMyLjE3MDQzMTAxMTg.#html/TOOLPATTERNSELECTION.html?Highlight=selection%20pattern

      Going by the organic shape, I exclude the Symmetry option here.

      Here is an option, not a plug-in, but a Python Tag-based solution. (It is from a few years ago, but my quick test showed no flaws. Perhaps I miss something, so please test this carefully
      https://www.cineversity.com/vidplaylist/cv-parametric_selection_tag/cv-parametric_selection_tag_tour_and_reference
      https://www.cineversity.com/vidplaylist/cv-parametric_selection_tag/cv-parametric_selection_tag_download_and_install

      All the best

      Dr. Sassi Sassmannshausen Ph.D.
      Senior Trainer, Maxon Master Trainer, L&D - Strategist
      Cinema 4D mentor since 2004, Member of VES, DCS.

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      • Dr. Sassi
        Dr. Sassi last edited by Dr. Sassi Feb 23, 2024, 9:59 PM Feb 23, 2024, 9:57 PM

        P.S.: there is one limitation with the newer Symmetry tool, as the stored selection is always limited to the manually created ones, not the "reflections" of it. One can overwrite or create multiple entries for a single polygon, hence the limitation.
        Here is my workaround and guidance to get it done anyway. (20sec, silent capture)

        https://stcineversityprod02.blob.core.windows.net/$web/Cineversity_Forum_Support/2024_Clips_DRS/20240223_Store_Selection_Symmetry_drs.mp4

        Dr. Sassi Sassmannshausen Ph.D.
        Senior Trainer, Maxon Master Trainer, L&D - Strategist
        Cinema 4D mentor since 2004, Member of VES, DCS.

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        • R
          reading-card last edited by Feb 24, 2024, 4:03 AM

          Thank you for your prompt reply!
          The pattern selection tool as well as the cv parametric selection tag would be extremely useful but they are restricted to polygon selections. I am aiming for edge selections, similar to a wireframe that only shows the horizontal rows of a cylindrical mesh. The mesh itself has to stay parametrically as it will deform/alter in several ways but keeps it's topology. Enhances scene example: https://www.dropbox.com/scl/fi/m8dcl0a7wy10t54urc15g/ring-loop-selections.c4d?rlkey=5gpk4puim2o7rbnp7f1ouy254&dl=0
          Thinking of creating a straight cylinder with the same poly count as the loft nurbs. Then create a cloner with spline circles one for each polygon row. Make it edible and glue it to the cylinder with the surface modifier and attach the cylinder on the loft nurbs with a morph tag. A huge workaround and probably one part might not work or something has to become edible and the procedural creation workflow got lost...

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          • Dr. Sassi
            Dr. Sassi last edited by Dr. Sassi Feb 24, 2024, 8:14 AM Feb 24, 2024, 7:09 AM

            Hi reading-card,

            Let me add one suggestion; perhaps it will lead to some ideas on your side.

            Here, I first create a Loft with some splines. The Edge Tag is already set up with the Splines that shape it.
            Those Spline will work as Fields for the one extra step.
            Object Manager> Object> Current State To Object
            This automatically gets the specific Edge Tag with the Splines, and a double click on the tag will select the edges close to it.

            Here is a screen capture, 20 seconds.
            https://stcineversityprod02.blob.core.windows.net/$web/Cineversity_Forum_Support/2024_Clips_DRS/20240223_Store_Selection_Symmetry_drs.mp4
            The file
            CV4_2024_drs_24_MOsp_21.c4d
            The Subdivision might be better done during render time.

            So, why not use the Splines from the Loft in the first place? Perhaps it is easier to get a single object instead of all splines used in the Loft, and it is easier to switch them on or off in the Field of the Edge Tag.

            More as a brainstorming contribution:
            Screen Shot 2024-02-23 at 10.30.42 PM.jpg
            CV4_2024_drs_24_MOsp_11.c4d

            Cheers

            Dr. Sassi Sassmannshausen Ph.D.
            Senior Trainer, Maxon Master Trainer, L&D - Strategist
            Cinema 4D mentor since 2004, Member of VES, DCS.

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