WalkerBuddy

Checks walker neighborhood and step suggestions

Syntax: WalkerBuddy(wa,wb,step)

• wa source walker for neighborhood check

• wb walker to check if is in neighborhood

• step place where suggested step will be stored

Returns: This function returns a value that represents the relationship between wa and wb.

• 0 wa is on same spot as wb

• 1 wa must do a perpendicular step to reach wb

• 2 wa must do a diagonal step to reach wb

• 3 wa is too far to reach wb in one single step

Notes: This function checks if wb is in close neighborhood to wa. It also suggests a step which wa can perform to reach the spot of wb. In case wb is too far away from wa number 3 is returned and step is filled by STEP_NONE.

Example:

• if(WalkerBuddy(wa,wb,step)<3) {...}, if wb is close to wa do ...

• WalkerBuddy(wa,wb,step), if wb is close to wa, put the step into step