Add 'invisibility' mod.

README.md

@@ -78,6 +78,7 @@ The game includes the mods from the default [minetest_game](https://github.com/m
 * player_visuals/
     * 3d_armor ([3d_armor modpack][3d_armor]) ([LGPL / WTFPL / CC-BY-SA][lic.3d_armor]) -- version: [0.4.4-41-456c84e Git][ver.3d_armor]
     * [character_creator][] ([WTFPL / CC-BY-SA][lic.character_creator]) -- version: [5e8fec2 Git][ver.character_creator]
+    * [invisibility][] ([MIT][lic.invisibility]) -- version: [bf4156b Git][ver.invisibility]
     * [playeranim][] ([WFTLPL][lic.playeranim.1]) / [BSD][lic.playeranim.2]) - version [f1c542e Git][ver.playeranim]
     * [wardrobe][] ([WTFPL][lic.wardrobe]) -- version: [1.1-2-c48b011 Git][ver.wardrobe]
     * wieldview ([3d_armor modpack][3d_armor])  ([LGPL / WTFPL / CC-BY-SA][lic.3d_armor]) -- version: [0.4.4-41-456c84e Git][ver.3d_armor]
@@ -221,6 +222,7 @@ The game includes the mods from the default [minetest_game](https://github.com/m
 [hudmap]: https://github.com/stujones11/hudmap
 [ilights]: https://forum.minetest.net/viewtopic.php?t=12200
 [intllib]: https://forum.minetest.net/viewtopic.php?t=4929
+[invisibility]: https://forum.minetest.net/viewtopic.php?t=14846
 [invisible]: https://forum.minetest.net/viewtopic.php?t=14399
 [inventory_plus]: https://forum.minetest.net/viewtopic.php?t=3100
 [jukebox]: https://forum.minetest.net/viewtopic.php?t=13505
@@ -307,6 +309,7 @@ The game includes the mods from the default [minetest_game](https://github.com/m
 [lic.creeper]: mods/mobs_aggressive/creeper/LICENSE.md
 [lic.homedecor]: mods/homedecor_modpack/LICENSE
 [lic.ilights]: mods/lighting/ilights/init.lua
+[lic.invisibility]: mods/player_visuals/invisibility/license.txt
 [lic.jukebox]: mods/furniture/jukebox/README.txt
 [lic.mdoors.1]: mods/mydoors/mdoors/README.txt
 [lic.mdoors.2]: doc/modpacks/mydoors/licence.txt
@@ -328,6 +331,7 @@ The game includes the mods from the default [minetest_game](https://github.com/m
 [ver.creeper]: https://github.com/Rui-Minetest/creeper/tree/036666e
 [ver.homedecor]: https://github.com/minetest-mods/homedecor_modpack/tree/02a4d14
 [ver.ilights]: https://github.com/minetest-mods/ilights/tree/d5f6900
+[ver.invisibility]: https://github.com/tenplus1/invisibility/tree/bf4156b
 [ver.jukebox]: https://github.com/minetest-mods/jukebox/tree/e6a507f
 [ver.mobs_monster]: https://github.com/tenplus1/mobs_monster/tree/91cbcf7
 [ver.playeranim]: https://github.com/minetest-mods/playeranim/tree/f1c542e

mods/player_visuals/invisibility/README.md

@@ -0,0 +1,16 @@
+
+Invisibility Potion by TenPlus1
+
+This mod lets you craft an invisibility potion using 1x Nyan Cat Rainbow and 1x Glass Bottle.
+
+Use potion to hide yourself AND nametag (0.4.14 dev only) for 5 minutes.
+
+Server admin can use the '/vanish <name>' command to hide/unhide players or themselves by leaving it blank.
+
+Forum Page: https://forum.minetest.net/viewtopic.php?f=9&t=14846
+
+Changelog:
+
+ - 0.1 - Initial Upload
+ - 0.2 - Added error checking and a 10 second warning before becoming visible
+ - 0.3 - Potions can now be stacked

mods/player_visuals/invisibility/depends.txt

@@ -0,0 +1,2 @@
+default
+vessels

mods/player_visuals/invisibility/init.lua

@@ -0,0 +1,196 @@
+
+invisibility = {}
+
+local effect_time = 300 -- 5 minutes
+
+-- reset player invisibility if they go offline
+
+minetest.register_on_leaveplayer(function(player)
+
+	local name = player:get_player_name()
+
+	if invisibility[name] then
+		invisibility[name] = nil
+	end
+end)
+
+-- invisibility potion
+
+minetest.register_node("invisibility:potion", {
+	description = "Invisibility Potion",
+	drawtype = "plantlike",
+	tiles = {"invisibility_potion.png"},
+	inventory_image = "invisibility_potion.png",
+	wield_image = "invisibility_potion.png",
+	paramtype = "light",
+	is_ground_content = false,
+	walkable = false,
+	selection_box = {
+		type = "fixed",
+		fixed = {-0.25, -0.5, -0.25, 0.25, 0.3, 0.25}
+	},
+	groups = {vessel = 1, dig_immediate = 3, attached_node = 1},
+	sounds = default.node_sound_glass_defaults(),
+
+	on_use = function(itemstack, user)
+
+		local pos = user:getpos()
+		local name = user:get_player_name()
+
+		-- are we already invisible?
+		if invisibility[name] then
+
+			minetest.chat_send_player(name,
+				">>> You are already invisible!")
+
+				return itemstack
+		end
+
+
+		-- make player invisible
+		invisible(user, true)
+
+		-- play sound
+		minetest.sound_play("pop", {
+			pos = pos,
+			gain = 1.0,
+			max_hear_distance = 5
+		})
+
+		-- display 10 second warning
+		minetest.after(effect_time - 10, function()
+
+			if invisibility[name]
+			and user:getpos() then
+
+				minetest.chat_send_player(name,
+					">>> You have 10 seconds before invisibility wears off!")
+			end
+		end)
+
+		-- make player visible 5 minutes later
+		minetest.after(effect_time, function()
+
+			if invisibility[name]
+			and user:getpos() then
+
+				-- show aready hidden player
+				invisible(user, nil)
+
+				-- play sound
+				minetest.sound_play("pop", {
+					pos = pos,
+					gain = 1.0,
+					max_hear_distance = 5
+				})
+			end
+		end)
+
+		-- take potion, return empty bottle (and rest of potion stack)
+		if not minetest.setting_getbool("creative_mode") then
+
+			local item_count = user:get_wielded_item():get_count()
+			local inv = user:get_inventory()
+			local giving_back = "vessels:glass_bottle"
+
+			if inv and item_count > 1 then
+
+				if inv:room_for_item("main", {name = "vessels:glass_bottle"}) then
+
+					inv:add_item("main", {name = "vessels:glass_bottle"})
+				else
+					pos.y = pos.y + 1
+
+					minetest.add_item(pos, {name = "vessels:glass_bottle"})
+				end
+
+				giving_back = "invisibility:potion " .. tostring(item_count - 1)
+
+			end
+
+			return ItemStack(giving_back)
+		end
+
+	end,
+})
+
+-- craft recipe
+
+minetest.register_craft( {
+	output = "invisibility:potion",
+	type = "shapeless",
+	recipe = {"default:nyancat_rainbow", "vessels:glass_bottle"},
+})
+
+-- invisibility function
+
+invisible = function(player, toggle)
+
+	if not player then return false end
+
+	local name = player:get_player_name()
+
+	invisibility[name] = toggle
+
+	local prop
+
+	if toggle == true then
+
+		-- hide player and name tag
+		prop = {
+			visual_size = {x = 0, y = 0},
+			collisionbox = {0, 0, 0, 0, 0, 0}
+		}
+
+		player:set_nametag_attributes({
+			color = {a = 0, r = 255, g = 255, b = 255}
+		})
+	else
+		-- show player and tag
+		prop = {
+			visual_size = {x = 1, y = 1},
+			collisionbox = {-0.35, -1, -0.35, 0.35, 1, 0.35}
+		}
+
+		player:set_nametag_attributes({
+			color = {a = 255, r = 255, g = 255, b = 255}
+		})
+	end
+
+	player:set_properties(prop)
+
+end
+
+-- vanish command (admin only)
+
+minetest.register_chatcommand("vanish", {
+	params = "<name>",
+	description = "Make player invisible",
+	privs = {server = true},
+
+	func = function(name, param)
+
+		-- player online
+		if param ~= ""
+		and minetest.get_player_by_name(param) then
+
+			name = param
+
+		-- player not online
+		elseif param ~= "" then
+
+			return false, "Player " .. param .. " is not online!"
+		end
+
+		local player = minetest.get_player_by_name(name)
+
+		-- hide / show player
+		if invisibility[name] then
+
+			invisible(player, nil)
+		else
+			invisible(player, true)
+		end
+
+	end
+})

mods/player_visuals/invisibility/license.txt

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2016 TenPlus1
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

mods/player_visuals/invisibility/sounds/license.txt

@@ -0,0 +1,2 @@
+
+Pop sound from www.freesfx.co.uk