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    Voronoi Fracture

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    • D
      DaveMDarcy last edited by

      Hello,

      How can I use the Voronoi fracture to break an object into two equal halves? I've used it many time before but in the past I've always been happy with the random breaking and multiple pieces. This time though, I only want two halves with the object being split horizontally. I've tried reducing the points to give me only two pieces but I cant make it so that the break is along the horizontal axis. I also want have random jagged edges of the break.

      Kind Regards
      Dave

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

        Hi Dave,

        Please have a look here:

        CV4_2026_drs_25_MGth_01.c4d

        I have placed two Matrix "Points"—the Voronoi Fracture —and cut between them. The Voronoi concept is that, between two points, an imaginary "Plane" is created, always exactly in the middle. This plane is defined strictly for the closest "point-pair'. If another point is there, it will create another "Virtual Plane" as well. The plane ends where the next point pair is closer to it. Those planes are always halfway and 90º (perpendicular) to the axis formed by these two points. Like the ÷ sign.

        (The "Voronoi Diagram" is often explained as a 2D system, then a Line is used between the points, but here we typically need a "Virtual Plane" in 3D)

        Since you need only two points, that "Virtual Plane" theoretically never stops. In that way, a clean cut is done.

        The Matrix Points are placed based on the Distances in the Object Tab and in the Transform Tab. You can, of course, move the Matrix to change the outcome for the Veronoi Fracture.

        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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        • D
          DaveMDarcy last edited by

          Oh wow that is such a fantastic explanation! Thanks ever so much Dr Sassi, I'll let you know how my project goes 😉

          Kind Regards
          Dave

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          • Dr. Sassi
            Dr. Sassi last edited by

            Thank you very much, Dave.

            Thanks for taking the time to reply!
            Yes, please. Never hesitate to ask — I'm happy to share.

            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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