API Reference > OdDb Classes > OdDbCircle Class > OdDbCircle Methods > OdDbCircle::getFirstDeriv Method
OdDbCircle::getFirstDeriv Method
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Parameters |
Description |
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double param |
[in] Parameter value specifying the point on the circle as a Double value in radians. |
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OdGeVector3d& firstDeriv |
[out] Reference to a variable in which this method must save the first derivative as three-dimensional vector instance. |
Computes the first derivative for the specified parameter of the circle entity and returns the three-dimensional vector instance.
Example of Working with the Circle Object
Computed Circle Properties
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