Slide Vertex along object

[shannonhochkins]

Hi, 

I'm wondering if there's a way, to move a vertex, based on the UV position.

More or less, I know I can calculate the position of a UV point, as well as a vertex point, but I'm wondering if this is the best way to tackle a skin slider plugin...

I want to compare or rather link a control to a UV selection, that when moved in 3D space, not in the UV editor, that the mesh can inherit or copy it's translations. seing as UV only allows 2D movements, I figured if I can find out that information, transfer that to the vertex and then move the vertex along it's U & V directions giving it it's new position.

I'm trying to take advantage of Maya's API with this one too, but as of yet, I'm not able to find anything that can get me this information, nore have I found any information on this online anywhere.

Does anyone know any tricks?

Shannon 

[trevor-van-hoof--2]

The MFnMesh class can transform a UV coord to 3D and vice versa, so you could start there in making your own geometry constraint. The getPointAtUv method requires a faceId, so in the event you constrain it to certain polygons you can iterate over those. It will return kFailure when the UV coordinate specified is not in the polygon's UVs, so not the nearest point on the specified polygon id which is what the docs kinda suggest...