World to UV coordinates?

Questions
1

I’m passing world coordinates to a shader (custommaterial) and now I need to convert those to UV coordinates. How can I do that? Here is a PG where I want the ellipse on the plane to follow the moving mesh.

https://www.babylonjs-playground.com/#0DI1M2#13

Thanks

2

I’m not sure if I’m going in the right direction with this, since the mesh is going to be deformed and I don’t want the shape that I’m creating in the mesh to be deformed (it’s going to be more complex than the ellipse) with the mesh. I need to think some more about this.

3

hey dear @adam what you want to do in final target

4

https://www.babylonjs-playground.com/#0DI1M2#14

length((vDiffuseUV -0.5)* (scaleParameter ) * vec2(ellips.x ,ellips.y ))

5

Thanks Nas. I think I figured it out.

https://www.babylonjs-playground.com/#0DI1M2#16

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