API Reference > OdGe Classes > OdGePointOnSurface Class > OdGePointOnSurface Methods > vDeriv Method > OdGePointOnSurface::vDeriv Method (int, OdGePoint2d&)
OdGePointOnSurface::vDeriv Method (int, OdGePoint2d&)
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Parameters |
Description |
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int order |
[in] Specifies the order of the derivitive [1-2]. |
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const OdGePoint2d& param |
[in] Parameter to specify a point on surface. |
Returns the specified derivative of the surface in the V direction at the point corresponding to the parameter.
Specifying param updates the underlying value.
Currently not implemented.
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