Function compareByZ

compareByZ(a: Geometry.Point3d, b: Geometry.Point3d): number
Compares points based on Z value. XY values are ignored. Returns values:
- 0: If a.z === b.z
- 1: A is below B (ie. a.z > b.z)
- -1: A is above B (ie. a.z < b.z)
Parameters
- a: Geometry.Point3d
- b: Geometry.Point3d
Returns number
Example: Sorting by Y
```
arrayOfPoints.sort(Points.compareByZ);
```