Create a vertices selection tag on a mesh using a near by object

[resort-sand]

Hello, I may explain the issue in a bad way, but long story short, I have a precise vertices selection tag on a moving mesh, and then when the mesh was updated by my animator, I discovered that even if it is the same vertices number, somehow the vertices list is different in location from the original mesh, is there a way to detect the vertices and tag them correctly using the first mesh ? like closest points or so ?

[Dr. Sassi]

Hi resort-sand,

This would be the
Main Menu> Character> Manager> Property Transfer Manager (formerly VAMP)
https://help.maxon.net/c4d/2024/en-us/Default.htm#html/11344.html

You just drag the source and the Target into the fields, check what you like to have transferred, and even the selection Tag will be produced for the Target.

I tested it, just in case (2024.5.1) works fine here.

However, the change of points has a reason which should be explored. For example, the animator might have used Remesh, and if that is the case, perhaps knowing why that was done helps you deliver what is wanted to avoid extra work.

All the best

[Dr. Sassi]

P.S.: If the transfer needs more options to adjust, here is a different workflow.

In short, Points turned into a Matrix and then turned into Fields, which allows us to set the radius of influence.

CV4_2024_drs_24_MOst_01.c4d

[resort-sand]

Hey Dr. I will try both, the thing is that it is a rotomotion and sometimes the two geos even if they have the same vertices number, the selection seems different enough to not be useable. I think both techniques you pointed out needs the two geos to be superposing each other !!!

[Dr. Sassi]

Hi resort-sand,

Thanks for the update. The Property Transfer Manager can work with local coordinates, but the object axis needs to be oriented in a matching way and be object-based. In other words, all points relate to the object axis. If the Object axis is not set up comparably, the local transfer will not work in a matching way.

When I read Rotomotion and similar geo, may I assume that the object is textured and the texture is the same on both, or at least would if applied?

If so, a grayscale image could store the selection inside the Point Selection applied via Shader Field—just a thought.

Excuse my curiosity here: What I miss, not having seen the setup, is that you have the geos; what is the obstacle to not using the data to match their positions, etc?

As usual, having a file here, even just a proxy resembling the problem, I might support you in a better way. (If it is over. 1MB, it won't take thec4d file, then please use Dropbox, Google, Apple, Adobe, Wetransfer as cloud service only, no tiny-URL, for security reasons, thank you)

My best wishes for the project