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