Creating a unit which freezes the terrain beneath it?

[shadowhawke]

I've been making a ice-people faction recently and I had an idea for a unit which, when it moves, the terrain it passes over becomes the "frozen" version - e.g. flats become snow, water becomes ice, etc.

Does anyone have any ideas as to how I could make this work?
I thought of using moveto events but that would only work on the tile the unit moves to, not the tiles that it moves over...

Moved to WML Workshop
-- shadowmaster

[Anonymissimus]

as for the moved-over hexes: no way - really
(for the moved-to ones, store the terrain and make a switch clause computing the new terrain...)

[shadowhawke]

Thanks, I didn't think it was possible but I wanted to check with the masters

[Alarantalara]

It can and has been done. Check out the Terrain Artist addon, which modifies the entire path taken using Lua.

This is a copy (slightly modified to make it closer to what you need) of the code for the moveto event. You would need to replace "randterrain" with your own event to set the terrain.

Code: Select all

[event]
        name=moveto
        first_time_only=no
        [lua]
            code=<<
				local this = ...
				local unit = wesnoth.copy_unit(wesnoth.get_units({ id = this.unit_id })[1])
				unit.x = this.from_x
				unit.y = this.from_y
				local path = wesnoth.find_path(unit, this.to_x, this.to_y)
				for i, loc in ipairs(path) do
					wesnoth.set_variable("unit.x", loc[1])
					wesnoth.set_variable("unit.y", loc[2])
					wesnoth.fire_event("randterrain")
			    end
			>>
            [args]
                unit_id=$unit.id
                from_x = $x2
                from_y = $y2
                to_x = $x1
                to_y = $y1
            [/args]
        [/lua]
    [/event]