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ashutosh081599

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Surface normal in Autocad

1)Can anyone tell me how to calculate
direction cosines of normal to a curved
surface at a given point on it,in AutoCad.
2)can anyone tell me how to trap information from autocad text window and save it in a file.this has to be done through a program so, copy and paste cannot be used.
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nick_hall

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ashutosh081599

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