What formula can I use to calculate the info given by UVHelper?



I’m trying to calculate the same information as what is given by the SketchUp::UVHelper class, in C# where I don’t have access to this neat class.

I would like to be able to input the normal vector of a given mesh (face) and then input any point3D and be able to receive output as a point2D. I’ve searched for several days and simply can’t come up with a formula that works.

Does anyone know what formula the UVHelper uses to calculate the UV positions? @thomthom? @DanRathbun?

Here are some more questions I have posted.


Finally found my answer here.


Several years ago Andreas wrote a post on SketchUcation about how the UVQ values worked: http://sketchucation.com/forums/viewtopic.php?f=180&t=47123#p421262


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