Added dripping liquids

mods/liquiddrip/depends.txt

@@ -0,0 +1 @@
+default

mods/liquiddrip/init.lua

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+local function passable(name)
+    local block = minetest.registered_nodes[name]
+
+    return block
+        and block.walkable == false
+        and block.liquidtype == "none"
+
+end
+
+local droplet = {
+    hp_max = 1,
+    physical = true,
+    weight = 0,
+    collisionbox = {0, 0, 0, 0, 0, 0},
+    visual = "cube",
+    visual_size = {x=0.05, y=0.15},
+    textures = {},
+    is_visible = true,
+    makes_footstep_sound = false,
+    automatic_rotate = false,
+    spritediv = {x=1, y=1},
+    initial_sprite_basepos = {x=0, y=0},
+
+    on_activate = function(self)
+        self.object:setsprite({x=0, y=0}, 1, 1, true)
+        self.object:setacceleration({x=0, y=-10, z=0})
+    end,
+
+    on_step = function(self)
+        if self.object:getvelocity().y ~= 0 then
+            return
+        end
+
+        local position = self.object:getpos()
+        position.y = position.y - 0.5
+
+        if not passable(minetest.get_node(position).name) then
+            self.object:remove()
+            position.y = position.y + 0.5
+        end
+    end,
+}
+
+droplet.textures = {"default_water.png","default_water.png","default_water.png","default_water.png", "default_water.png", "default_water.png"}
+minetest.register_entity("liquiddrip:water", table.copy(droplet))
+
+droplet.textures = {"default_lava_source_animated.png","default_lava_source_animated.png","default_lava_source_animated.png","default_lava_source_animated.png", "default_lava_source_animated.png", "default_lava_source_animated.png"}
+minetest.register_entity("liquiddrip:lava", table.copy(droplet))
+
+local function create_droplet(position, name)
+    local block = minetest.registered_nodes[minetest.get_node{x=position.x, y=position.y +1, z=position.z}.name]
+
+    if not block then
+        return
+    end
+
+    if block.liquidtype == "none" then
+        return
+    end
+
+    if passable(minetest.get_node({x=position.x, y=position.y -1, z=position.z}).name) then
+        minetest.add_entity({x=position.x+math.random(0.05, 0.95), z=position.z+math.random(0.05, 0.95), y=position.y-math.random(0.2, 0.8)}, name) -- vary the spawn location a bit
+    end
+end
+
+minetest.register_abm({
+    nodenames = {"group:crumbly", "group:cracky", "group:choppy"},
+    neighbors = {"group:water"},
+    interval = 2,
+    chance = 50,
+    catch_up = false,
+    action = function(pos)
+        create_droplet(pos, "liquiddrip:water")
+    end,
+})
+
+
+
+--Create lava drop
+
+minetest.register_abm({
+    nodenames = {"group:crumbly", "group:cracky", "group:choppy"},
+    neighbors = {"group:lava"},
+    interval = 2,
+    chance = 25,
+    catch_up = false,
+    action = function(pos)
+        create_droplet(pos, "liquiddrip:lava")
+    end,
+})