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Thread: Bending a tornado

  1. #1

    Bending a tornado

    I'm trying to rotate a tube and bend it at the same time, but I want the direction of bend to be independent of the rotation, so that the whole tube continues to rotate around its (bent) center. Think of one of the tornadoes in Twister. Unfortunately, I can't seem to find the magic to get this to to work. Instead of rotating and then bending, the bend seems to happen first and then the rotation turns the bend in the wrong direction.

    Here's what it looks like now: https://www.youtube.com/watch?v=w9N6...ature=youtu.be

    Here's the scene file: packaged.zip

    Anyone have any ideas how to accomplish this? I have a terrible feeling it may be very simple, but I just can't wrap my brain around it....

  2. #2
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    I would not call it easy..



    rotate then bones.zip

    Multiply Time by some value to have faster/slower rotation..

    ps. Twister video is unavailable from here, so I don't know what's there. I simply assumed to reverse order bones-then-rotate to rotate-then-bones.
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  3. #3
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    Video showing how above node setup & scene is working here:
    Rotate Then Bones.zip

  4. #4
    Beautiful! Wow, that's some heavy engineering you put in to make that work! I applaud you an thank you very much for helping!

    The "Twister" video is just a clip from the 1996 film of the same name, showing some lovely CGI tornadoes (including a flying cow). If you've never seen the movie, it's worth watching just for the effects.

  5. #5
    Registered User Slartibartfast's Avatar
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    There is also a deform tool under item properties/deform called something like bender (away from LW now so I can't check). It adds a null which you can move to bend the mesh. It might work without any nodes :-)
    I remember I used it in this clip

  6. #6
    RETROGRADER prometheus's Avatar
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    huh...not many posted links or attachments are working in this thread, the linked twister youtube clip is removed, sensei´s posted scenefile is missing the objects and has a lot of requester of missing plugins.

    How is the rendering of the tornado supposed to be? hypervoxels or rendered geometry?

    Michael

  7. #7
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    Quote Originally Posted by prometheus View Post
    huh...not many posted links or attachments are working in this thread, the linked twister youtube clip is removed, sensei´s posted scenefile is missing the objects
    I used the same objects as OP scene file.
    Put my scene to his Scenes folder, and you can load it.

    and has a lot of requester of missing plugins.
    It's using TrueArt's Node Library...

  8. #8
    Registered User Slartibartfast's Avatar
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    Quote Originally Posted by Slartibartfast View Post
    There is also a deform tool under item properties/deform called something like bender (away from LW now so I can't check). It adds a null which you can move to bend the mesh. It might work without any nodes :-)
    I remember I used it in this clip
    Nope, it didn't work

  9. #9
    Newbie Member DesertRat's Avatar
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    I got this to work - a single bone controls the spin of the cylinder, then I applied the Bend modifier to the cylinder.
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    Mac OSX 10.10.2, 2.8 GHz Intel Core i5, 4 GB RAM

  10. #10
    @DesertRat - That's great! One bone, one plugin! You rock. Thanks!

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