forked from Minetest/dynamic_liquid
62 lines
2.0 KiB
Lua
62 lines
2.0 KiB
Lua
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local flow_through_directions = {
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{{x=1,z=0},{x=0,z=1}},
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{{x=0,z=1},{x=1,z=0}},
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}
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local get_node = minetest.get_node
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local set_node = minetest.set_node
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dynamic_liquid.flow_through_abm = function(def)
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minetest.register_abm({
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label = "dynamic_liquid flow-through",
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nodenames = def.nodenames,
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neighbors = dynamic_liquid.registered_liquid_neighbors,
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interval = 1,
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chance = 2, -- since liquid is teleported two nodes by this abm, halve the chance
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catch_up = false,
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action = function(pos)
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local source_pos = {x=pos.x, y=pos.y+1, z=pos.z}
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local dest_pos = {x=pos.x, y=pos.y-1, z=pos.z}
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local source_node = get_node(source_pos)
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local dest_node
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local source_flowing_node = dynamic_liquid.registered_liquids[source_node.name]
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local dest_flowing_node
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if source_flowing_node ~= nil then
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dest_node = get_node(dest_pos)
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if dest_node.name == source_flowing_node or dest_node.name == "air" then
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set_node(dest_pos, source_node)
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set_node(source_pos, dest_node)
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return
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end
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end
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local perm = flow_through_directions[math.random(2)]
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local dirs -- declare outside of loop so it won't keep entering/exiting scope
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for i=1,2 do
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dirs = perm[i]
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-- reuse to avoid allocating a new table
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source_pos.x = pos.x + dirs.x
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source_pos.y = pos.y
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source_pos.z = pos.z + dirs.z
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dest_pos.x = pos.x - dirs.x
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dest_pos.y = pos.y
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dest_pos.z = pos.z - dirs.z
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source_node = get_node(source_pos)
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dest_node = get_node(dest_pos)
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source_flowing_node = dynamic_liquid.registered_liquids[source_node.name]
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dest_flowing_node = dynamic_liquid.registered_liquids[dest_node.name]
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if (source_flowing_node ~= nil and (dest_node.name == source_flowing_node or dest_node.name == "air")) or
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(dest_flowing_node ~= nil and (source_node.name == dest_flowing_node or source_node.name == "air"))
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then
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set_node(source_pos, dest_node)
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set_node(dest_pos, source_node)
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return
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end
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end
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end,
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})
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end
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