rangeIntersection
Public Function
Finds the intersection of two ranges.
Parameters
| Name | Description | 
|---|---|
  | The start point in the A range  | 
  | The end point in the A range  | 
  | The start point in the B range  | 
  | The end point in the B range  | 
Returns
[number, number] | null
The intersection of the ranges, or null if no intersection