nether.lua

   1 --nether teleporters are animation based
   2 --the animation must finish before the teleport is initialized
   3
   4 local hud_id = nil --foreground (portal)
   5 local hud_bg_id = nil --black background
   6 local nether_id = nil --the nether incoming
   7 local cool_off_timer = 0 --use this to stop players teleporting back and forth
   8 local init_sound = nil
   9 local teleport_sound = nil
  10 minetest.register_globalstep(function(dtime)
  11         if not minetest.localplayer or not minetest.camera then
  12                 return
  13         end
  14         --use this for player cooloff timer also to not overload server
  15         if cool_off_timer > 0 then
  16                 cool_off_timer = cool_off_timer - dtime
  17                 if cool_off_timer <= 0 then
  18                         cool_off_timer = 0
  19                 end
  20         end
  21
  22         local pos = minetest.localplayer:get_pos()
  23         pos.y = pos.y + 0.1
  24
  25         local node = minetest.get_node_or_nil(pos)
  26
  27         if node and node.name == "nether:portal" and cool_off_timer == 0 then
  28                 if hud_bg_id == nil then
  29                         hud_bg_id = minetest.localplayer:hud_add({
  30                                 hud_elem_type = "image", -- see HUD element types, default "text"
  31                                 position = {x=0.5, y=0.5},
  32                                 name = "",    -- default ""
  33                                 scale = {x=-100, y=-100}, -- default {x=0,y=0}
  34                                 text = "darkness.png",    -- default ""
  35                         })
  36                         hud_id = minetest.localplayer:hud_add({
  37                                 hud_elem_type = "image", -- see HUD element types, default "text"
  38                                 position = {x=0.5, y=0.5},
  39                                 name = "",    -- default ""
  40                                 scale = {x=-1, y=-1}, -- default {x=0,y=0}
  41                                 text = "nether_portal_gui.png",    -- default ""
  42                         })
  43                         nether_id = minetest.localplayer:hud_add({
  44                                 hud_elem_type = "image", -- see HUD element types, default "text"
  45                                 position = {x=0.5, y=0.5},
  46                                 name = "",    -- default ""
  47                                 scale = {x=0, y=0}, -- default {x=0,y=0}
  48                                 text = "darkness.png",    -- default ""
  49                         })
  50                         init_sound = minetest.sound_play("portal_initialize",{gain=0,pitch=math.random(70,90)/100})
  51                         minetest.sound_fade(init_sound, 0.34, 1)
  52
  53                 else
  54                         --make the hud zoom in
  55                         local scale = minetest.localplayer:hud_get(hud_id).scale.x
  56                         if scale > -100 then
  57                                 scale = scale - ((scale/-(1/dtime))*2)
  58                         elseif scale < -100 then
  59                                 scale = -100
  60                         end
  61                         minetest.localplayer:hud_change(hud_id, "scale", {x=scale,y=scale})
  62                 end
  63         elseif hud_bg_id and hud_id then
  64                 --play spooky sounds
  65                 if init_sound then
  66                         minetest.sound_fade(init_sound, -0.25, 0)
  67                         init_sound = nil
  68                         teleport_sound = minetest.sound_play("portal_teleported",{gain=1,pitch=math.random(70,90)/100})
  69                         minetest.sound_fade(teleport_sound, -0.1, 0)
  70                         teleport_sound = nil
  71                 end
  72                 --player left portal before teleporting
  73                 if cool_off_timer == 0 then
  74                         --make the hud zoom out
  75                         local scale = minetest.localplayer:hud_get(hud_id).scale.x
  76                         if scale < -1 then
  77                                 scale = scale + ((scale/-(1/dtime))*2)
  78                         elseif scale > -1 then
  79                                 scale = -1
  80                         end
  81                         minetest.localplayer:hud_change(hud_id, "scale", {x=scale,y=scale})
  82
  83                         if scale == -1 then
  84                                 minetest.localplayer:hud_remove(hud_bg_id)
  85                                 minetest.localplayer:hud_remove(hud_id)
  86                                 minetest.localplayer:hud_remove(nether_id)
  87                                 nether_id = nil
  88                                 hud_bg_id = nil
  89                                 hud_id = nil
  90                         end
  91                 --teleport complete animation
  92                 else
  93                         local scale = minetest.localplayer:hud_get(nether_id).scale.x
  94                         if scale == 0 then scale = -1 end
  95                         if scale > -100 then
  96                                 scale = scale - ((scale/-(1/dtime))*2)
  97                         elseif scale < -100 then
  98                                 scale = -100
  99                         end
 100                         minetest.localplayer:hud_change(nether_id, "scale", {x=scale,y=scale})
 101                         if scale == -100 then
 102                                 minetest.localplayer:hud_remove(hud_bg_id)
 103                                 minetest.localplayer:hud_remove(hud_id)
 104                                 minetest.localplayer:hud_remove(nether_id)
 105                                 nether_id = nil
 106                                 hud_bg_id = nil
 107                                 hud_id = nil
 108                         end
 109                 end
 110         elseif hud_bg_id and hud_id then
 111                 minetest.localplayer:hud_remove(hud_bg_id)
 112                 minetest.localplayer:hud_remove(hud_id)
 113                 minetest.localplayer:hud_remove(nether_id)
 114                 nether_id = nil
 115                 hud_bg_id = nil
 116                 hud_id = nil
 117         end
 118
 119         --initialize teleport command to server
 120         if hud_bg_id and hud_id and cool_off_timer == 0 then
 121                 local scale = minetest.localplayer:hud_get(hud_id).scale.x
 122                 if scale == -100 then
 123                         nether:send_all("teleport me")
 124                         --can't use any portal for 6 seconds
 125                         cool_off_timer = 6
 126                 end
 127         end
 128 end)