CGTalk - Blendshape with SubD's: Possible?

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stzaske

08-25-2002, 05:23 PM

I've got a character I'm trying to lipsync, using blendshapes, and I was hoping to have him be a subD surface. But I cannot seem to find a way to attach his subD face to his subD body, after the blendshape creation. Maya's "Attach" says that it cannot attach subd's with history.

Here is what I was trying to do.

1. Model a full poly character.
2. Cut his face off and create blendshapes on his face.
3. Convert his body to a SubD
4. Convert the blendshape faces to SubD's.
5. ATTACH the base-Blendshape onto his SubD Body.
6. Build a beautiful animation.

Unfortunately I'm stuck on step 5. I see that I can create blendshapes between two different SubD's, but I'm just stuck with the weakness of Maya's subD attach.

Does anyone use SubD's for characters getting lipsynced? How do you create the blendshapes? It looks like I COULD just leave the face attached to the body and blendshape the whole character, but that doesn't seem like the right thing to do.

Help is definitely appreciated.

-=STZ=-

Jozvex

08-26-2002, 08:46 AM

I don't think it's a Subd problem,

I'm pretty sure you can't attach any type of morphing object to anything else because of the way morphing works.

All objects' vertices are given a number, the way morphing works is by moving all the verts of one object, to the position of the vertices in the other object, based on the verts number.

Eg, vertice number 346 moves to the relative location of vertice 346 on the other model.

So if you attached two objects, I think the vertices all get renumbered.

Oh and besides, the real head has to have the same number of vertices as the targets, so if you attach it to the body, it'll have tons more vertices.

dr_bob

08-26-2002, 07:10 PM

This might work:-

1) Create your poly model;
2) Duplicate your poly model, and convert the duplicate to subD's
3) Split the head off from the original poly model
4) Create the blend shapes on the poly head
5) Use the poly head and body as wrap deformers for the subD model

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