Vector3d.DiffrentialAngle Method

Returns the signed angle in range (-PI,PI) from this vector to vector v, in the plane that has 'normal' as normal. The normal is needed because we dont know which side of the plane defined by the vectors that is frontside. 'normal' does not need to be normalized.
public double DiffrentialAngle( 
   Vector3d v
   Vector3d normal 
)

Parameters

v
Vector3d

normal
Vector3d

Return Value

double

.NET Framework

Supported in: 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8

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Definition