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  1. #1
    Axes grinder- Dongle #99
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    Thumbs down IK setting, please explain

    See attached JPEG:

    Could someone explain what this dropdown menu's function is? The settings are:
    Base on First Keyframe
    Base on Most Recent Keyframe
    Base on Current Time
    Base on Frame ...

    The explanation of this dropdown is seemingly missing from the dox.
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    Praise to Buddha!
    Chard's Credo-"Documentation: PART of the Interface"
    GunFAIL LXXV -Invite your friends over, and shoot them.

  2. #2
    Goes bump in the night RebelHill's Avatar
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    its for denoting where the IK solver looks to find its base/rest state/pose.
    RHiggit Rigging and Animation Tools
    RHN Nodal Tutorials
    RHR Rigging Tutorials
    GI Tutorial On cmiVFX
    YT Vids Tuts for all

  3. #3
    Axes grinder- Dongle #99
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    Thanks for the info.

    I don't understand the implications, but that's more than the PDFs seemingly had.

    Praise to Buddha!
    Chard's Credo-"Documentation: PART of the Interface"
    GunFAIL LXXV -Invite your friends over, and shoot them.

  4. #4
    Goes bump in the night RebelHill's Avatar
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    IK uses a base state/pose (vis a vis prebend) to determine how the chain should behave, right... this setting tells the solver which frame to look at to get that pose.
    RHiggit Rigging and Animation Tools
    RHN Nodal Tutorials
    RHR Rigging Tutorials
    GI Tutorial On cmiVFX
    YT Vids Tuts for all

  5. #5
    So I suppose itīs useful when you have a model with not bent arms/legs/whatever. Then could you rig a character at frame 0 (in instance) an then pose it with arms,legs... bent in frame 1 and specify the base current time on 1? Should it works this way?

    Vector

  6. #6
    Goes bump in the night RebelHill's Avatar
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    Yes... if for some reason you needed to setup a character with perfectly straight limbs at bind pose, you could key the prebend on another frame and reference that... that's basically the purpose of it, whilst things like current/most recent frame options allow you to alter the IK behviour across the course of an animation by changing FK values on the items in question.
    RHiggit Rigging and Animation Tools
    RHN Nodal Tutorials
    RHR Rigging Tutorials
    GI Tutorial On cmiVFX
    YT Vids Tuts for all

  7. #7
    Axes grinder- Dongle #99
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    Ahhhhh, "prebend"! That makes a lot of sense. Be nice if the manual mentioned it, at all.

    "Bind pose"-- is that a common term of art amongst riggers?

    Thanks, RH!

    Praise to Buddha!
    Chard's Credo-"Documentation: PART of the Interface"
    GunFAIL LXXV -Invite your friends over, and shoot them.

  8. #8
    RebelHill recommended to me the Thimoty Albee book about character animation and he talks about that issue. Very interesting... a few improvements in setup (joints, same as item motion controllers, etc) since Lw8 so the book could be a bit out of date, but the basics still works

    Vector

 

 

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