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Activity Forums Zaxwerks 3D Flag: Loop?

  • Matt Rhodes

    April 28, 2005 at 4:06 pm

    Hi Garrett.

    If no parameters change over time (that is, the Wind Speed isn’t animated, the Flagpole isn’t animated, etc.),
    the flag will likely settle into a loop.

    Finding the starting point and ending point depends on many factors, so you’ll have to determine that on your own.

    Matt Rhodes
    Zaxwerks, Inc.

  • Zax Dow

    April 28, 2005 at 9:04 pm

    Here’s a little more detail to add to what Matt is saying…

    The 3D Flag plug-in is a completely physics-based cloth simulation, so you can’t set exact start/stop keyframes. However, wind in this simulation is very very smooth, it doesn’t suddenly dip or turn unless you tell it to. So if you set the wind speed to be constant the flag will fall into a rhythm. You can then render out a few seconds of the animation and find a decent looping point to do a crossfade and, viola!, you have a looping segment of video.

    Here it is in steps. . .
    1- Set up the flag.
    2- Set the wind speed to 11.
    3- Set Pre-roll to 8 (you want to make sure the flag is well into the simulation before you start to render)
    4- Render out 10 seconds of animation.
    5- Take the clip into an editing program.
    6- Duplicate it and make the top layer partially transparent.
    7- Slide the bottom copy back and forth in time, until you match up the wave patterns.
    8- Set the transparency back to normal.
    9- Do a short dissolve from one copy to the other at the match point. (“short” means something like half a second)
    10- Render out the looping section of flag.

    There you go!

  • Matt Rhodes

    April 28, 2005 at 9:06 pm

    That’s what I meant to say. 🙂


  • Garrett Wasny

    April 29, 2005 at 10:19 am

    Thanks so much! Exactly the information I wanted! Much appreciated. FYI, I use Zaxwerks products — Proanimator, Invigorator, and now 3D Flag — all the time in all my productions! Keep up the outstanding work!

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