Mapgen Valley, v6 -> lava and water

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SFENCE
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Mapgen Valley, v6 -> lava and water

by SFENCE » Post

I am experimenting with mapgens.

I am trying to remove generated world below some level (-7000 for example).

Code: Select all

local c_ignore = minetest.get_content_id("ignore")
local c_air = minetest.get_content_id("air")

minetest.register_on_generated(function(minp, maxp, blockseed)
  local vm, emin, emax = minetest.get_mapgen_object("voxelmanip")
  local data = vm:get_data()
  local area = VoxelArea:new({MinEdge=emin, MaxEdge=emax})
  
  if (minp.y>=-8000) and (minp.y<=-7000) 
      and (maxp.y>=-8000) and (maxp.y<=-7000) then
    for i in area:iter(minp.x, minp.y, minp.z, maxp.x, maxp.y, maxp.z) do
      data[i] = c_air;
    end
    vm:set_data(data)
    vm:set_lighting({day=15, night=0})
    vm:write_to_map()
  end
end)
With this result for valleys mapgen:
Image

It looks similar when v6 mapgen is used.

So, it looks like mapgens generate lava/water after on_generate function is called.

Can be this behaviour fixed by same way?
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