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Link 3 values in blender that aren’t normally linked

Forum Archive › Link 3 values in blender that aren’t normally linked

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  • December 9, 2024 at 12:11 am #19327
    Sid Edwards
    Participant

      I’d like to take three different Powers from 3 different light sources, values that normally are independent from each other, and link them by an equation. The equation I’d like them to follow is W1 + W2 + W3 = 400, to constrain the total power they output in this linear fashion.

      By choosing W3 as a seed, I can then re-write W2 in terms of W1 as well.

      Is there a way to link and automate the adjustments of these light sources in a easy beginner-friendly way?

      December 9, 2024 at 3:56 am #91684
      Martin Bergwerf
      Participant

        Drivers come to mind there, but you have a math problem with your formula. What happens with W1 and W2, when you change W3, for instance?

        You say you can use W3 as a seed and then write W2 as x times W1, if I understand that right…If you do that, you have a solvable equation and you can use a Driver that writes W1 (and thus W2) in terms of W3.

        Is that easy and beginner-friendly? Probably not,

        December 9, 2024 at 8:46 am #91685
        Martin Bergwerf
        Participant

          To give an example of how this could be done with Drivers (wouldn’t call it beginner-friendly):

          Lights.png

          The Total (400 Watt) is ‘hard coded’ here, but it wouldn’t be difficult to add another Custom Property for that.

          If you want to play around, here’s a link to the .blend:

          https://drive.google.com/file/d/1NUkACNcy7hqo3zrcWHiuMveTPHpriEX3/view?usp=sharing

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