how do control inner circle based by the outer circle? and how do create a surface between inner curve and outer curve

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How about this?

thanks,sir but how do control inner curve based by inner curve,and i need to change z value each point

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Not sure I quite understand what you’re trying to do.

In my example the inner curve is controlled by the radius of the outer curve.

Also… not a sir :laughing:

I need a surface through the line. it’s possible?

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Do you mean like this:

OR like this?


ya I like this but I want a smooth surface

Try using Geometry.Translate to move the inner circle. Will give a smoother surface

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what’s wrong this?
Warning: Face.Vertices expects argument type(s) (Autodesk.DesignScript.Geometry.Face), but was called with (Autodesk.DesignScript.Geometry.Solid).