Map Dimension Limitations

[Hooman]

There seems to be a map size limitation of 1024 x 512.

We've known of a limitation for a while, but I don't think a reason why was ever posted so here is one.

In the ctMoMove Command Packet, the waypoints have the x and y coordinates bit packed into a 4 byte field. The lower 15 bits are for x and the next 14 bits are for y. They have pixel granularity, so that gives a maximum of 2^15 / 32 pixels per tile = 1024 tiles wide, and 2^14 / 32 pixels per tile = 512 tiles high.

Outside of that range units will not be able to set proper destinations due to overflow.

[Highlander]

So does this equal a world map then ?

What about "Fractures", that map is "taller" than the usual world map, isn't it ?

[Sirbomber]

Fractures is 128 x 256. Around the World and Axen's Home are both 512 x 256.
I thought going above 512 on the x-axis caused OP2 to crash? So the real map limitations would be 512 x 512?

[Arklon]

I think he meant 512x1024 (since I could do that fine).

[Hooman]

I'm pretty sure the problem I mentioned allows for up to 1024 x 512. Maybe I'll do a bit of actual testing.

Edit: Altough, non around the world maps do double up on the x direction, so maybe there are additional problems above a width above 512. But around the world-ness is controlled by the width of the map, so it shouldn't need to double up at that size. Could always be a bug related to that behavior though.

[Arklon]

Well, if you're right, then the real size limitation would be 512x512.

[Sirbomber]

Nobody ever listens to me...  :rolleyes:  

[Arklon]

Nobody ever listens to me...  :rolleyes:

Exactly.

[BlackBox]

Yeah, the game crashes if you use a map more than 512 wide. It could be something to do with the code that handles the wrapping for world maps.

Has anyone actually tried maps that are 512 high?

Furthermore, I bet the game would display a map properly that was above that (in vertical size)... you just couldn't issue commands to the lower 512 rows of the map.

[Arklon]

Yeah, the game crashes if you use a map more than 512 wide. It could be something to do with the code that handles the wrapping for world maps.

Has anyone actually tried maps that are 512 high?

Furthermore, I bet the game would display a map properly that was above that (in vertical size)... you just couldn't issue commands to the lower 512 rows of the map.

Yes, maps 512-1024 tiles tall work.

[Sirbomber]

But you can't do anything in the lower half? Then what's the point? Sounds like a waste of the mapper's time to me.
But maybe somebody could find a use for it...