Replacing specific terrain

[michaelan]

Hello, I'm an amateur WML coder, and I'm wondering if there's a way to change a map's terrain by filtering the terrain type instead of its location. For example, let's say I'm making a scenario where I want every water hex to be replaced with an ice hex.

Code: Select all

	[event]
     name= turn 3
	 [terrain]
	  [filter]
	   [filter_location]
	    terrain=Wwg
	   [/filter_location]
	  [/filter]
	  terrain=Ai
	 [/terrain]
	[/event]

This was my attempt, but it didn't work. I'd appreciate it if someone could tell me if this is possible and give me a sample code if it is. Thanks!

[zookeeper]

Code: Select all

	[event]
     name= turn 3
	 [terrain]
	  [and]
	    terrain=Wwg
	  [/and]
	  terrain=Ai
	 [/terrain]
	[/event]

[UnwiseOwl]

Zookeeper: That always seems like strange syntax.
Why is this preferable to the old=/new= like the [terrain_mask]?

[zookeeper]

Zookeeper: That always seems like strange syntax.
Why is this preferable to the old=/new= like the [terrain_mask]?

It wouldn't make sense. Apples and oranges.

[UnwiseOwl]

To me
[terrain]
[and]... is complete gibberish.

But I guess this is why you're the coder and I'm not

[gfgtdf]

i agree that this syntax is rather strange, if we would implement [terrain] now it'd probably have a [filter_location] tag or a new_terrain= attribtue, and work similar to how michaelan though it would. The reason why is has the current syntax is that [terrain] used to only have terrain=,x=,y= attributes and no location filter support and then the x=,y= syntax was exteded with complate location filter support so the terrain= attribute clashed with the terrain= attribute in location filters.

[michaelan]

Thanks so much for the help, Zookeeper. It worked perfectly.

The syntax for this specific code is rather unintuitive. Will this potentially be changed in the future?

[Fabluiso]

what if i want to store a location variable so that the terrain changes at a later point. like, lets say that i have a map with both ice and water terrain. then, i change all the water to become ice, with zookeeper's code. later, i want all the ice terrain that used to be water to go back to being water, with the original ice terrain staying the same. how do i store the original water terrain into a variable so that i can change it back later?

[zookeeper]

what if i want to store a location variable so that the terrain changes at a later point. like, lets say that i have a map with both ice and water terrain. then, i change all the water to become ice, with zookeeper's code. later, i want all the ice terrain that used to be water to go back to being water, with the original ice terrain staying the same. how do i store the original water terrain into a variable so that i can change it back later?

Then what you want to do is to store all the water locations for example in a prestart event like this:

Code: Select all

[store_locations]
    terrain=Wwg
    variable=water_locs
[/store_locations]

And then whenever you want to change the terrain on all of those locations at once, you just do this:

Code: Select all

[terrain]
    find_in=water_locs
    terrain=Ai
[/terrain]

Then to make sure the variables don't stay cluttering up your savefiles forever, just do {CLEAR_VARIABLE water_locs} in your victory event or whenever you don't need them anymore.