sectionArcInPlaneOfInterpolatedNormal Method

Create a section arc with start and end at positions A and B, and in plane with the normal at a fractional interpolation between.

sectionArcInPlaneOfInterpolatedNormal(angleA: LongitudeLatitudeNumber, intermediateNormalFraction: number, angleB: LongitudeLatitudeNumber, result?: Arc3d): undefined | Arc3d

@returns arc in the plane defined by the normal at the intermediate point, or undefined if calculation fails.

Parameter Type Description
angleA LongitudeLatitudeNumber start point of arc (given as angles on this ellipsoid)
intermediateNormalFraction number fraction at which to interpolate normals at A and B to define arc plane
angleB LongitudeLatitudeNumber end point of arc (given as angles on this ellipsoid)
result Arc3d optional pre-allocated object to populate and return

Returns - undefined | Arc3d

arc in the plane defined by the normal at the intermediate point, or undefined if calculation fails.

Defined in

Last Updated: 06 December, 2025