API Reference > OdDb Classes > OdDbRay Class > OdDbRay Methods > TD_USING Method > OdDbRay::TD_USING Method (OdDbCurve::getFirstDeriv)
OdDbRay::TD_USING Method (OdDbCurve::getFirstDeriv)
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Syntax
C++
Description

This is TD_USING, a member of class OdDbRay.

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