API Reference › core-geometry› Curve › DirectSpiral3d › CreateFromLengthAndRadius

createFromLengthAndRadius MethodStatic

Create (if possible) a DirectSpiral3d, applying various strict conditions appropriate to the spiral type. The parameter list includes extraneous values in order to directly match IntegratedSpiral3d.create, which has greater flexibility about mixtures of values.

  • IMPORTANT RESTRICTIONS
    • Direct spirals must have the inflection at the origin of their coordinate system, aligned with the x axis.
      • hence bearing0 = 0
      • hence radius0 = 0
    • bearing1 is ignored
    • radius1 must be given.
    • arcLength must be given,

createFromLengthAndRadius(spiralType: string, radius0: number, radius1: number, bearing0: Angle, _bearing1: Angle, arcLength: number, activeInterval: Segment1d, localToWorld: Transform): undefined | TransitionSpiral3d

Parameter Type Description
spiralType string one of the types in DirectSpiralTypeNames
radius0 number radius (or 0 for tangent to line) at start. Must be ZERO or UNDEFINED
radius1 number radius (or 0 for tangent to line) at end.
bearing0 Angle bearing, measured CCW from x axis at start. Must be ZERO or UNDEFINED
_bearing1 Angle  
arcLength number  
activeInterval Segment1d  
localToWorld Transform placement transform

Returns - undefined | TransitionSpiral3d

Defined in

Last Updated: 24 June, 2025