Add bubble particles for players being underwater

mods/CORE/mcl_particles/description.txt

@@ -0,0 +1 @@
+Contains particle images of MineClone 2. No code.

mods/CORE/mcl_particles/mod.conf

@@ -0,0 +1 @@
+name = mcl_particles

mods/PLAYER/mcl_player/depends.txt

@@ -0,0 +1 @@
+mcl_particles

mods/PLAYER/mcl_player/init.lua

@@ -201,6 +201,34 @@ minetest.register_globalstep(function(dtime)
 			else
 				player_set_animation(player, "stand", animation_speed_mod)
 			end
+
+			-- Spawn bubble particles when underwater
+
+			local pos = player:getpos()
+			local head_pos = {
+				x = math.floor(pos.x+0.5),
+				y = math.ceil(pos.y+1.0),
+				z = math.floor(pos.z+0.5)
+			}
+
+			if minetest.get_item_group(minetest.get_node(head_pos).name, "water") ~= 0 then
+				minetest.add_particlespawner({
+					amount = 2,
+					time = 0.15,
+					minpos = { x = -0.25, y = 0.3, z = -0.25 },
+					maxpos = { x = 0.25, y = 0.7, z = 0.75 },
+					attached = player,
+					minvel = {x = -0.2, y = 0, z = -0.2},
+					maxvel = {x = 0.5, y = 0, z = 0.5},
+					minacc = {x = -0.4, y = 4, z = -0.4},
+					maxacc = {x = 0.5, y = 1, z = 0.5},
+					minexptime = 0.3,
+					maxexptime = 0.8,
+					minsize = 0.7,
+					maxsize = 2.4,
+					texture = "mcl_particles_bubble.png"
+				})
+			end
 		end
 	end
 end)