Update API and Add Settings

api.lua

@@ -40,6 +40,18 @@ function liquid_physics.get_liquid_at(pos)
     return { liquid_id = lpn.liquid_id, liquid_level = lpn.liquid_level }
 end
 
+-- Returns the node names for a liquid ordered by the corresponding liquid level
+-- Useful if you want to register an ABM or LBM
+-- @param liquid_id number ID of the liquid
+-- @return          table  Table of liquid node names for that id
+function liquid_physics.get_liquid_node_names(liquid_id)
+    local nodes = {}
+    for i = 2, 9 do
+        table.insert(nodes, liquid_physics._registered_liquids[liquid_id][i])
+    end
+    return nodes
+end
+
 -- Sets the liquid at the position specified
 -- Returns true if the operation was successful
 -- @param pos          table  Position of the Node
@@ -96,6 +108,7 @@ function liquid_physics.register_liquid(namespace, source_name, flowing_name)
         local node_name = "liquid_physics:" .. namespace .. "_" .. source_name .. "_level_" .. i
 
         local level_def = {
+            name = node_name,
             description = source_liquid_def.description .. " Level " .. i,
             tiles = source_liquid_def.tiles,
             use_texture_alpha = source_liquid_def.use_texture_alpha,
@@ -131,13 +144,15 @@ function liquid_physics.register_liquid(namespace, source_name, flowing_name)
             sounds = source_liquid_def.sounds,
         }
 
-        core.register_node(node_name, level_def)
+        core.register_node(":" .. node_name, level_def)
         liquid_physics._liquid_ids[node_name] = id
 
         table.insert(liquids, node_name)
+        table.insert(liquid_physics._liquids, node_name)
     end
 
     table.insert(liquids, source_liquid_name)
+    table.insert(liquid_physics._liquids, source_liquid_name)
 
     -- Finally, stop flowing
     core.override_item(flowing_liquid_name, { liquid_range = 0, liquid_renewable = false }, nil)

init.lua

@@ -17,32 +17,33 @@ local modpath = core.get_modpath(core.get_current_modname())
 
 liquid_physics = {}
 
---INTERNAL USE ONLY - Stores all nodes which need to checked
+-- INTERNAL USE ONLY - Stores all nodes which need to checked
 liquid_physics._nodes_to_check = {}
---INTERNAL USE ONLY - Stores liquid_id and the corresponding liquid node names
+-- INTERNAL USE ONLY - Stores liquid_id and the corresponding liquid node names
 liquid_physics._registered_liquids = {}
---INTERNAL USE ONLY - Stores all liquid node names and their corresponding liquid_id
+-- INTERNAL USE ONLY - Stores all liquid node names and their corresponding liquid_id
 liquid_physics._liquid_ids = {}
+-- INTERNAL USE ONLY - All liquid nodes for ABM and LBM
+liquid_physics._liquids = {}
 
 local internal = dofile(modpath .. "/internal.lua")
 dofile(modpath .. "/api.lua")
 
+local namespace = ""
+
 if core.get_modpath("default") then
-    liquid_physics.register_liquid("default", "water_source", "water_flowing")
-    liquid_physics.register_liquid("default", "lava_source", "lava_flowing")
+    namespace = "default"
+elseif core.get_modpath("mcl_core") then
+    namespace = "mcl_core"
+else
+    error("Liquid Physics only supports VoxeLibre or Minetest")
 end
 
-if core.get_modpath("mcl_core") then
-    liquid_physics.register_liquid("mcl_core", "water_source", "water_flowing")
-    liquid_physics.register_liquid("mcl_core", "lava_source", "lava_flowing")
+if core.settings:get_bool("liquid_physics_enable_water_physics") then
+    liquid_physics.register_liquid(namespace, "water_source", "water_flowing")
 end
-
--- Remove "air" from registered_liquids for lbm and abm
-local source_names = {}
-for key, value in pairs(liquid_physics._registered_liquids) do
-    for i = 2, table.getn(value) do
-        table.insert(source_names, value[i])
-    end
+if minetest.settings:get_bool("liquid_physics_enable_lava_physics") then
+    liquid_physics.register_liquid(namespace, "lava_source", "lava_flowing")
 end
 
 core.register_on_placenode(function(pos, newnode, placer, oldnode, itemstack, pointed_thing)
@@ -53,7 +54,7 @@ end)
 
 core.register_lbm {
     name = "liquid_physics:update",
-    nodenames = source_names,
+    nodenames = liquid_physics._liquids,
     run_at_every_load = true,
     action = function(pos, node, dtime_s)
         internal.add_node_to_check(pos)
@@ -61,7 +62,7 @@ core.register_lbm {
 }
 
 core.register_abm({
-    nodenames = source_names,
+    nodenames = liquid_physics._liquids,
     neighbors = { "air" },
     interval  = 0.2,
     chance    = 0,

settingtypes.txt

@@ -0,0 +1,2 @@
+liquid_physics_enable_water_physics (Enable physics for water) bool true
+liquid_physics_enable_lava_physics (Enable physics for lava) bool true