enum CombineOp in Tinman.Terrain.Pyramids

Computes the union of the results (first combined with second).

Remarks:

The following table shows the combinations for this function (header row := first result, header column := second result):

      | Error | Void  | Ok    | Empty |
------+-------+-------+-------+-------+
Error | Error | Error | Error | Error |
------+-------+-------+-------+-------+
Void  | Error | Void  | Ok    | Empty |
------+-------+-------+-------+-------+
Ok    | Error | Ok    | Ok    | Ok    |
------+-------+-------+-------+-------+
Empty | Error | Empty | Ok    | Empty |
------+-------+-------+-------+-------+

Computes the intersection of the results (first combined with second).

Remarks:

The following table shows the combinations for this function (header row := first result, header column := second result):

      | Error | Void  | Ok    | Empty |
------+-------+-------+-------+-------+
Error | Error | Error | Error | Error |
------+-------+-------+-------+-------+
Void  | Void  | Void  | Void  | Void  |
------+-------+-------+-------+-------+
Ok    | Error | Void  | Ok    | Ok    |
------+-------+-------+-------+-------+
Empty | Error | Void  | Ok    | Empty |
------+-------+-------+-------+-------+