Erinfest/mods/ITEMS/mcl_potions/splash.lua

local splash_image = function(colorstring, opacity)
	if not opacity then
		opacity = 127
	end
	return "mcl_potions_splash_overlay.png^[colorize:"..colorstring..":"..tostring(opacity).."^mcl_potions_splash_bottle.png"
end

local function register_splash(name, descr, color, def)

    local id = "mcl_potions:"..name.."_splash"
    minetest.register_craftitem(id, {
        description = descr,
        inventory_image = splash_image(color),
        on_use = function(itemstack, placer, pointed_thing)
            --weapons_shot(itemstack, placer, pointed_thing, def.velocity, name)
            local velocity = 10
            local dir = placer:get_look_dir();
            local pos = placer:getpos();
            local obj = minetest.env:add_entity({x=pos.x+dir.x,y=pos.y+2+dir.y,z=pos.z+dir.z}, id.."_flying")
            obj:setvelocity({x=dir.x*velocity,y=dir.y*velocity,z=dir.z*velocity})
            obj:setacceleration({x=0, y=-9.8, z=0})
            itemstack:take_item()
            return itemstack
        end,
				stack_max = 1,
    })

    local w = 0.7

    minetest.register_entity(id.."_flying",{
        textures = {splash_image(color)},
		hp_max = 1,
		visual_size = {x=w/2,y=w/2},
		collisionbox = {-w,-w,-w,w,w,w},
        on_step = function(self, dtime)
          local pos = self.object:getpos()
          local node = minetest.get_node(pos)
          local n = node.name
					local d = 2
					local redux_map = {7/8,0.5,0.25}
          if n ~= "air" then
						minetest.sound_play("mcl_potions_breaking_glass")
						minetest.add_particlespawner({
																				amount = 40,
																				time = 2,
																				minpos = {x=pos.x-d, y=pos.y, z=pos.z-d},
																				maxpos = {x=pos.x+d, y=pos.y+1, z=pos.z+d},
																				minvel = {x=-1, y=0, z=-1},
																				maxvel = {x=1, y=0.5, z=1},
																				minacc = {x=-0.5, y=0, z=-0.5},
																				maxacc = {x=0.5, y=.2, z=0.5},
																				minexptime = 1,
																				maxexptime = 5,
																				minsize = 2,
																				maxsize = 4,
																				collisiondetection = false,
																				vertical = false,
																				texture = "mcl_potions_sprite.png^[colorize:"..color..":127",
																			})
            self.object:remove()
						for i, obj in ipairs(minetest.get_objects_inside_radius(pos, 4)) do

							if minetest.is_player(obj) then

								pos2 = obj:get_pos()
								local rad = math.floor(math.sqrt((pos2.x-pos.x)^2 + (pos2.y-pos.y)^2 + (pos2.z-pos.z)^2))
								if rad > 0 then def.potion_fun(obj, redux_map[rad]) else def.potion_fun(obj, 1) end
								print(obj:get_player_name().." "..math.floor(rad))

							end
						end
					end
        end,
    })
end

register_splash("healing", "Splash Healing", "#AA0000", {
    potion_fun = function(player, redx) player:set_hp(player:get_hp() + 3*redx) end,
})

register_splash("healing_2", "Splash Healing II", "#DD0000", {
    potion_fun = function(player, redx) player:set_hp(player:get_hp() + 6*redx) end,
})

register_splash("harming", "Splash Harming", "#660099", {
    potion_fun = function(player, redx) mcl_potions.healing_func(player, -4*redx) end,
})

register_splash("harming_2", "Splash Harming II", "#330066", {
    potion_fun = function(player, redx) mcl_potions.healing_func(player, -6*redx) end,
})

register_splash("leaping", "Splash Leaping", "#00CC33", {
		potion_fun = function(player, redx) mcl_potions.leaping_func(player, 1.2, 135*redx) end
})

register_splash("leaping_2", "Splash Leaping II", "#00EE33", {
		potion_fun = function(player, redx) mcl_potions.leaping_func(player, 1.4, 135*redx) end
})

register_splash("leaping_plus", "Splash Leaping +", "#00DD33", {
		potion_fun = function(player, redx) mcl_potions.leaping_func(player, 1.2, 360*redx) end
})

register_splash("swiftness", "Splash Swiftness", "#009999", {
		potion_fun = function(player, redx) mcl_potions.swiftness_func(player, 1.2, 135*redx) end
})

register_splash("swiftness_2", "Splash Swiftness II", "#00BBBB", {
		potion_fun = function(player, redx) mcl_potions.swiftness_func(player, 1.4, 135*redx) end
})

register_splash("swiftness_plus", "Splash Swiftness +", "#00BBBB", {
		potion_fun = function(player, redx) mcl_potions.swiftness_func(player, 1.2, 360*redx) end
})

register_splash("slowness", "Splash Slowness ", "#000080", {
		potion_fun = function(player, redx) mcl_potions.swiftness_func(player, 0.85, 68*redx) end
})

register_splash("slowness_plus", "Splash Slowness +", "#000066", {
		potion_fun = function(player, redx) mcl_potions.swiftness_func(player, 0.85, 180*redx) end
})

register_splash("poison", "Splash Poison", "#335544", {
		potion_fun = function(player, redx) mcl_potions.poison_func(player, 0.85, 180*redx) end
})

register_splash("poison_2", "Splash Poison II", "#446655", {
		potion_fun = function(player, redx) mcl_potions.poison_func(player, 0.85, 180*redx) end
})

register_splash("poison_plus", "Splash Poison II", "#557766", {
		potion_fun = function(player, redx) mcl_potions.poison_func(player, 0.85, 180*redx) end
})

register_splash("regeneration", "Splash Regeneration", "#A52BB2", {
		potion_fun = function(player, redx) mcl_potions.regeneration_func(player, 0.85, 180*redx) end
})

register_splash("regeneration_2", "Splash Regeneration II", "#B52CC2", {
		potion_fun = function(player, redx) mcl_potions.regeneration_func(player, 0.85, 180*redx) end
})

register_splash("regeneration_plus", "Splash Regeneration +", "#C53DD3", {
		potion_fun = function(player, redx) mcl_potions.regeneration_func(player, 0.85, 300*redx) end
})

register_splash("invisibility", "Splash Invisibility", "#B0B0B0", {
	potion_fun = function(player, redx) mcl_potions.invisiblility_func(player, 135*redx) end
})

register_splash("invisibility", "Splash Invisibility", "#A0A0A0", {
	potion_fun = function(player, redx) mcl_potions.invisiblility_func(player, 300*redx) end
})