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