Add an AlignmentSCS (SC or CS, Float Arc with Spiral) constrained by spiral parameter, the radius for the circular arc, and length of the circular arc.
public AlignmentSCS AddFloatingArcWithSpiral( int attachEntityId, EntityAttachType attachType, double spParam, SpiralParamType spType, double radius, double arcLength, bool isClockwise, SpiralType spiralDefinition )
Public Function AddFloatingArcWithSpiral ( attachEntityId As Integer, attachType As EntityAttachType, spParam As Double, spType As SpiralParamType, radius As Double, arcLength As Double, isClockwise As Boolean, spiralDefinition As SpiralType ) As AlignmentSCS
public: AlignmentSCS^ AddFloatingArcWithSpiral( int attachEntityId, EntityAttachType attachType, double spParam, SpiralParamType spType, double radius, double arcLength, bool isClockwise, SpiralType spiralDefinition )