54 lines
2.3 KiB
Lua
54 lines
2.3 KiB
Lua
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-- function to decide if a node has a wall that's in verticals_list{}
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-- returns wall direction of valid node, or nil if invalid.
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function biome_lib.find_adjacent_wall(pos, verticals, randomflag)
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local verts = dump(verticals)
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if randomflag then
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local walltab = {}
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if string.find(verts, minetest.get_node({ x=pos.x-1, y=pos.y, z=pos.z }).name) then walltab[#walltab + 1] = 3 end
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if string.find(verts, minetest.get_node({ x=pos.x+1, y=pos.y, z=pos.z }).name) then walltab[#walltab + 1] = 2 end
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if string.find(verts, minetest.get_node({ x=pos.x , y=pos.y, z=pos.z-1 }).name) then walltab[#walltab + 1] = 5 end
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if string.find(verts, minetest.get_node({ x=pos.x , y=pos.y, z=pos.z+1 }).name) then walltab[#walltab + 1] = 4 end
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if #walltab > 0 then return walltab[math.random(1, #walltab)] end
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else
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if string.find(verts, minetest.get_node({ x=pos.x-1, y=pos.y, z=pos.z }).name) then return 3 end
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if string.find(verts, minetest.get_node({ x=pos.x+1, y=pos.y, z=pos.z }).name) then return 2 end
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if string.find(verts, minetest.get_node({ x=pos.x , y=pos.y, z=pos.z-1 }).name) then return 5 end
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if string.find(verts, minetest.get_node({ x=pos.x , y=pos.y, z=pos.z+1 }).name) then return 4 end
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end
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return nil
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end
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-- Function to search downward from the given position, looking for the first
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-- node that matches the ground table. Returns the new position, or nil if
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-- height limit is exceeded before finding it.
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function biome_lib.search_downward(pos, heightlimit, ground)
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for i = 0, heightlimit do
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if string.find(dump(ground), minetest.get_node({x=pos.x, y=pos.y-i, z = pos.z}).name) then
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return {x=pos.x, y=pos.y-i, z = pos.z}
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end
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end
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return false
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end
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function biome_lib.find_open_side(pos)
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if minetest.get_node({ x=pos.x-1, y=pos.y, z=pos.z }).name == "air" then
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return {newpos = { x=pos.x-1, y=pos.y, z=pos.z }, facedir = 2}
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end
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if minetest.get_node({ x=pos.x+1, y=pos.y, z=pos.z }).name == "air" then
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return {newpos = { x=pos.x+1, y=pos.y, z=pos.z }, facedir = 3}
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end
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if minetest.get_node({ x=pos.x, y=pos.y, z=pos.z-1 }).name == "air" then
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return {newpos = { x=pos.x, y=pos.y, z=pos.z-1 }, facedir = 4}
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end
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if minetest.get_node({ x=pos.x, y=pos.y, z=pos.z+1 }).name == "air" then
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return {newpos = { x=pos.x, y=pos.y, z=pos.z+1 }, facedir = 5}
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end
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return nil
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end
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