Grasshopper

algorithmic modeling for Rhino

Surface normals bug

Hi, 

I have very strange surface normal bug...

According to the picture below, I just have simple 4 point surface and I try to get center normals of it. When I evaluate surface it appears far far far away.. Why?

Is there any other way to get center normals of the surface?

Thanks,

Petras

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Permalink Reply by Danny Boyes on May 25, 2013 at 4:03pm

The output C is a point in 3D space where as the UV input is a location on a surface expressed in 2 dimensions. Not the same things.

The best way to get the centre would be to reparameterise the input S (right click context menu) and use the input 0.5,0.5 to UV

otherwise the way to do it would be to first use a surface CP component to find the location on the surface of the centre point and then use the UV output of that component to input to evaluate surface

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