WalkerDiff

Calculates distance in 2D coordinate system and hints the next step

Syntax: WalkerDiff(wa,wb,dx,dy)

• wa walker or index of spot A

• wb walker or index of spot B

• dx place to store the difference in x coordinate

• dy place to store thedifference in y coordinate

Returns:

• Immediate return value gives step type describing how wa should continue to meet wb

• STEP_NOTHING walkers are at same spot or at opposite sides

• STEP ... if walker wa proceeds with this step, he will be closer to wb

Notes: dx and dy will contain values that represent the number of steps in each direction that walker wa would have to make to reach wb in the order of dx and dy. If wa would continue by the given suggested step and then ask for another one, finally it would reach wb. The returned step is determined by the highest absolute value between dx and dy. dx relates to STEP_FORWARD and STEP_BACKWARDS, while dy is STEP_LEFT and STEP_RIGHT. If wa is on the opposite side of wb, then STEP_NOTHING is performed and returned.

Example: WalkerDiff(23, GetCursor(),dx,dy), difference from index 23 to actual cursor

See also: WalkerStepTo, GetCursor, ReadAcc