quickUnitNormal Method

compute and normalize cross product among 3 points on the linestring.

• "any" 3 points are acceptable -- no test for positive overall sense.
• This is appropriate for polygon known to be convex.
• use points spread at index step n/3, hopefully avoiding colinear points.
• If that fails, try points 012

quickUnitNormal(result?: Vector3d): Vector3d | undefined

Defined in

• curve/LineString3d.ts

Last Updated: 08 January, 2020