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    Spline Emitter and Fields

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    • L
      leininger609 last edited by

      Is there a way to use fields to trigger where and when particles are emitted along a spline? For example if I have a helix spline and I animated a box field to align to spline, and it starts at the bottom of the spline and moves to the top, can it control the particles to only be emitted when the box field passes through that area of the spline? Hopefully that makes sense. Thanks!

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      • Dr. Sassi
        Dr. Sassi last edited by Dr. Sassi

        Hi leininger609,

        Please have a look below.

        CV4_2025_drs_24_PAfi_01.c4d
        This requires that the set-up is in Point Mode.
        This creates a weird limitation, as it is per frame or per second, which means the emission per point.
        .
        Points are essential for this to work fluently with fields. If you had only a few points, it wouldn't look very cohesive.
        .
        For that, I have set up the next file, where the MoSpline can change the number of points for the Destination Spline (see HUD element)
        CV4_2025_drs_24_PAfi_11.c4d

        Enjoy

        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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        • L
          leininger609 last edited by

          This is perfect. Thanks so much

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          • L
            leininger609 last edited by

            Since you lose the emission rate switching to points, any work around to controlling how many particles are emitted?

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            • Dr. Sassi
              Dr. Sassi last edited by

              Thanks for the reply, leininger609,

              This was the part of the suggestion in the …_11.c4d file. In the MoSpline, you can adjust the amount of points.
              Is that ideal? I have filed a report about it already, unlike a parameter.
              It works as long as it doesn't change the shape of the spline.

              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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              • L
                leininger609 last edited by

                thats brilliant. I thought at first it was controlling the points on the spline, not emission. Thank you!!!

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                • Dr. Sassi
                  Dr. Sassi last edited by

                  You're very welcome, leininger609.

                  Yes, it works for both; I hope it will enable you to find a sweet spot for your needs.

                  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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