(svn r4987) Feature: Merged YAPF into trunk. Thanks to devs for continuous support and users for testing.

yapf.txt

@@ -0,0 +1,39 @@
+Ships:
+======
+Set the YAPF (Yet Another Path Finder) type in the "Configure Pathes/Vehicles/YAPF for ships":
+ - 0 - No YAPF (NPF or old PF)
+ - 1 - YAPF type 1 (Node = Tile/Trackdir, 90 deg. turns allowed)
+ - 2 - YAPF type 2 (Node = Tile/ExitDir , 90 deg. turns allowed)
+ - 3 - YAPF type 3 (Node = Tile/Trackdir, no 90 deg.)
+ - 4 - YAPF type 4 (Node = Tile/ExitDir , no 90 deg.)
+
+
+Set the "npf_max_search_nodes" value in your openttd.cfg to tune the pathfinder behavior.
+This value tells, how many nodes (Tile/Trackdir or Tile/ExitDir) combinations the pathfinder
+should visit before it ends. The lower number would mean quicker, but less accurate results.
+The "npf_max_search_nodes" value is shared between NPF and YAPF and has the same meaning.
+
+The pathfinder without such limit would be unusable on large maps, where number of visited
+nodes can exceed 10 milions. NPF on my machine (dual code AMD 4400+) with 1 milion of nodes
+visited took 2 minutes to finish, but with this limit set to 10000 it takes 20 miliseconds.
+The new YAPF had similar results (18 seconds vs. 4 miliseconds).
+
+
+Road Vehicles:
+==============
+Set the YAPF (Yet Another Path Finder) type in the "Configure Pathes/Vehicles/YAPF for road vehs":
+ - 0 - No YAPF (NPF or old PF)
+ - 1 - YAPF type 1 (Node = Tile/Trackdir, 90 deg. turns allowed)
+ - 2 - YAPF type 2 (Node = Tile/ExitDir , 90 deg. turns allowed)
+
+Trains:
+=======
+Same types as for ships:
+ - 0 - No YAPF (NPF or old PF)
+ - 1 - YAPF type 1 (Node = Tile/Trackdir, 90 deg. turns allowed)
+ - 2 - YAPF type 2 (Node = Tile/ExitDir , 90 deg. turns allowed)
+ - 3 - YAPF type 3 (Node = Tile/Trackdir, no 90 deg.)
+ - 4 - YAPF type 4 (Node = Tile/ExitDir , no 90 deg.)
+
+
+