Applying a material to a specific Face within a Group

[medeek]

I have a very simple solid, a cylinder (ie. a threaded rod). I typically just apply a material to an entire group to get the effect I am looking for but in this case I would like to apply a specific material just to the face(s) that wrap around the cylinder and then at the group level I will apply my default material as normal.

Is there an easy way or algorithm to somehow grab this cylindrical face? I don’t think I’ve tried this one before since I usually apply threads to pre-configured components manually and then later load them into the model via the API.

[Neil_Burkholder]

I would filter the faces based on position using a grep.

[DanRathbun]

@medeek

Is there an easy way or algorithm to somehow grab this cylindrical face?

We have just been discussing this (and painting with textures) in 2 recent threads this past week.

Ie …

Texture inconsistent on the same component in different locations

Happy Friday, I have a question regarding textures on components using Ruby script. Please see the image below: [image] All three of these components are created using the same code, but the only difference is their positioning. The texture on the back-right component is how it is supposed to look, and the geometry for that component is based off the point [0,0,0]. But once the component is moved the texture gets distorted. The texture that I’m using is an .skm file that I created from a jpe…

… which is a continuation of …

How Can I Copy a Projected Texture With Ruby Script

Hi all, In Sketchup I can manually make a texture one face1 “projected” and use the eyedropper tool to to copy that texture onto another face2. The texture is then already “projected” on face2. I want to do this same thing, but with ruby script. With ruby script I know how to apply a texture to face1 and use face1.set_texture_projection(face1.normal, true) to make the texture “projected”. But, I cannot find a way to copy that texture onto face2 and have it already be “projected.” Is there any …

[medeek]

If I apply the thread texture to the entire group I get this:

Does not meet my standards, in short it is ugly.

[eneroth3]

I would probably model this detail manually and have it loaded from file, unless the screw is parametric.

Anyhow, another approach is to paint the group as a whole and then paint only the top face with a different material. This means there are fewer material references from the geometry, and the model could be viewed as cleaner.

[slbaumgartner]

If you generated the screw cylinder using push-pull, you should already know the face that is the end of the screw. In that case, the idea @eneroth3 suggests will be very easy to follow because you don’t have to search or test anything. Just apply a plain texture to that one (known) face and the thread texture to the enclosing group and you are done!