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Thread: Extract parts from mesh with mdd cache

  1. #1
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    Extract parts from mesh with mdd cache

    Hi, here is a uv ball with mdd animation, how to extract the pink parts and keeps the mdd animation? I mean the accurate animation from the original uv ball.
    Click image for larger version. 

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    Attached scene file: mdd_math.zip

  2. #2
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    You may try MDD Metapointer from DPKit,
    copy/paste the pink part as a separate object an save,
    in layout apply the node to this part object,
    selecting the original full object as cage.

    Then you may bake this part to get
    a MDD for it.

    Denis.

  3. #3
    da what? daforum's Avatar
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    That's cool info Denis, thank you.
    Might just try it myself

    Perchance, anyone made a Video tutorial?
    Montage Reel, Portfolio, PIN_01, Prime......«« go on, click on a link!

  4. #4
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    Make Weight map for purple area with 100% and the rest 0%.

    Add Weight node and Math > Vector > Scale.

    Plug everything.

    Only purple area is displaced by MDD now.

    Or invert Weight map, and purple area is constant now, but the all rest is displaced.

    Click image for larger version. 

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  5. #5
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    Quote Originally Posted by dpont View Post
    You may try MDD Metapointer from DPKit,
    copy/paste the pink part as a separate object an save,
    in layout apply the node to this part object,
    selecting the original full object as cage.

    Then you may bake this part to get
    a MDD for it.

    Denis.
    Thanks, Denis. Actually, that is what I first try.
    I just not sure if it's accurate enough, it's something like surface deformer or mesh deformer in other application.
    I like to know if dp-nearest point would do this thing? I need some document on how to use it.

  6. #6
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    Quote Originally Posted by mewnow View Post
    Thanks, Denis. Actually, that is what I first try.
    I just not sure if it's accurate enough, it's something like surface deformer or mesh deformer in other application.
    I like to know if dp-nearest point would do this thing? I need some document on how to use it.
    MetaPointer uses mesh surface, point and normal,
    with matching geometry, like here, full mesh and part,
    it is accurate, detected index then reading the proper cache data,
    major possible issue is a possible confusion if several point share
    the same location in the base shape.


    Nearest Point is strictly a point process,
    with same possible confusion.
    but setup is complex to do, extracting index in Local coordinates,
    then using MDD Cache.


    Denis.

  7. #7
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    My model do not have points share the same location, so it should be safe to use MetaPointer.
    Thanks Denis.

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