evaluatePointAndDerivativeInSpan Method

Evaluate point and derivative vector at a position given by fractional position within a span.

  • The derivative is with respect to the span fraction (NOT scaled to either global fraction or knot)

evaluatePointAndDerivativeInSpan(spanIndex: number, spanFraction: number): Ray3d

Parameter Type Description
spanIndex number  
spanFraction number  

Returns - Ray3d

Defined in

Last Updated: 14 November, 2024