War in the Pacific LCU Movement Mod


This mod is now at version 6.

Note: The LCU Movement mod is no longer required for versions of War in the Pacific that are patched to vefrsion 1.6 or later. This is because the updated map data has been incorporated into the official game patches. This mod is only useful for versions of the game at patch level 1.5 or older.

This mod is intended to be used with the official map, or with Subchaser's modified official map. It is not compatible with my own map mod.

Note: The first version and third version of this mod had errors which have been fixed in this version.

This mod is an offshoot from work I was doing for my Witp map. As part of that project I had to find out how the map data file provided with the game works. When I was examining the file I noticed something about how the presence of rail/road/track links between hexes is represented. Knowing that there was a perceived problem with the way LCUs sometimes seem to move too fast when moving from a hex that contains a transport link to one that does not, I decided to modify the data to see whether it had an effect. To my surprise the modified file seems to fix the problem, at least according to my very limited testing.

Using the unmodified map data file, when a LCU moves from a hex containing a transport link (e.g. a rail line) into a hex that does NOT contain a link of any kind, then the LCU moves at the same speed as when moving along the link itself.

For example: A LCU can move at a speed of 90 miles per day along a rail line. If it moves from a hex containing a rail line into an adjacent hex that does not (meaning that there is no rail line connecting the two hexes), then the LCU still moves at the " rail line" rate of 90 miles per day, meaning that it travels the entire 60 miles into the adjacent hex in a single day, regardless of the terrain type. in other words, the LCU "catapults" off the rail line and through 60 miles of, say, jungle, in one day.

My opinion is that this is unrealistic, particularly since if the LCU tries to move back to the hex containing the rail line, it no longer gains the benifit of the link. The benefit is only applied in one direction. Another inconsistency with this system is that if there are two adjacent hexes, both containing, for example, rail lines, but the railway does NOT join the two hexes (e.g. they are parallel), then when a LCU moves between the two hexes it does not gain the benifit of using the rail line.

At first I was sure that this behaviour was a bug, but I am now not sure whether the effect is intended or not. In any case I think that the game works better with my modification.

My LCU movement mod is intended to be used with the official game map, or with Subchaser's modified map. It is not dependent on the use of my map mod. The mod changes the way LCU movement works by ensuring that when a LCU moves from a hex containing a transport link to an adjacent hex that does not, then no benifit is gained form the link.

The mod also includes some fixes to anomalies in the map data, which conflict with what is shown on the map itself.

The easiest way to test the mod is to do the following:

  • Before applying the mod, start a new game, say scenario 15, as the Allies.

  • Plot a move for the base unit that starts in Alice Springs, Australia (hex 30,100), directly West into the desert hex (hex 29,100). Note that there is no rail link between Alice Springs and this hex (the rail line goes Southwest instead).

  • After one one-day turn the unit moves the entire distance - 60 miles - into the desert hex. This is even though the unit is only supposed to move 10 miles per day through desert terrain.

  • Plot a move for the unit back to Alice Springs. Even though it is now retracing its path it moves, correctly, at 10 miles per day.

  • Apply the mod and repeat the test. The unit will now move only 10 miles per day when moving from Alice Springs to the West, as welll as on the return move.

This mod is available for download:

LCU Movement Mod, version 6 LCU Movement Mod, version 6 (95 KB)
ReadMe file ReadMe file (13 KB)

The mod does not (yet) come with an installer, so it must be installed manually.

Note: It is very important to read the included readme file before installing or using this mod. The original map data file (pwhex.dat) MUST be backed up before installing my mod, or the file will be overwritten. If this happens the game may need to be reinstalled to get the original file back


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