Grasshopper

algorithmic modeling for Rhino

Hi,

When using the fonction evaluate surface, the 3d rhino model disappears. I am trying to get the normal on a curve surface. Is there a way to use an other fonction or to use it without crashing the model. 

Thanks  

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If you evaluate a surface you must use a UV coordinate. The SDivide component outputs UV coordinates in addition to XYZ coordinates. If you use the XYZ coordinates (like you're doing now) then the Z part is ignored and the XY part is interpreted as UV. However the UV space and the XYZ space have little in common and I'm guessing that at least one of the XY coordinates is way outside the UV domain of the surface. This will result in evaluated points which are very, very far away. This in turn causes all sorts of display issues.

Use UV instead of XYZ and you should be fine.

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