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 local opacity = 0
  11
  12 minetest.register_globalstep(function(dtime)
  13         if not minetest.localplayer or not minetest.camera then
  14                 return
  15         end
  16         --use this for player cooloff timer also to not overload server
  17         if cool_off_timer > 0 then
  18                 cool_off_timer = cool_off_timer - dtime
  19                 if cool_off_timer <= 0 then
  20                         cool_off_timer = 0
  21                 end
  22         end
  23
  24         local pos = minetest.localplayer:get_pos()
  25         pos.y = pos.y + 0.1
  26
  27         local node = minetest.get_node_or_nil(pos)
  28
  29         if node and node.name == "nether:portal" and cool_off_timer == 0 then
  30                 if init_sound == nil then
  31                         init_sound = minetest.sound_play("portal_initialize",{gain=0,pitch=math.random(70,90)/100})
  32                         minetest.sound_fade(init_sound, 0.34, 1)
  33                 end
  34                 if hud_bg_id == nil then
  35                         hud_bg_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=-100, y=-100}, -- default {x=0,y=0}
  40                                 text = "darkness.png^[opacity:"..opacity,    -- default ""
  41                         })
  42                         hud_id = minetest.localplayer:hud_add({
  43                                 hud_elem_type = "image", -- see HUD element types, default "text"
  44                                 position = {x=0.5, y=0.5},
  45                                 name = "",    -- default ""
  46                                 scale = {x=-1, y=-1}, -- default {x=0,y=0}
  47                                 text = "nether_portal_gui.png^[opacity:"..opacity,    -- default ""
  48                         })
  49                         nether_id = minetest.localplayer:hud_add({
  50                                 hud_elem_type = "image", -- see HUD element types, default "text"
  51                                 position = {x=0.5, y=0.5},
  52                                 name = "",    -- default ""
  53                                 scale = {x=0, y=0}, -- default {x=0,y=0}
  54                                 text = "darkness.png^[opacity:"..opacity,    -- default ""
  55                         })
  56                 else
  57                         --make the hud zoom in
  58                         local scale = minetest.localplayer:hud_get(hud_id).scale.x
  59                         if scale > -100 then
  60                                 scale = scale - ((scale/-(1/dtime))*2)
  61                         elseif scale < -100 then
  62                                 scale = -100
  63                         end
  64                         opacity = -scale * 2.55
  65                         minetest.localplayer:hud_change(hud_id, "scale", {x=scale,y=scale})
  66                         minetest.localplayer:hud_change(hud_id, "text", "nether_portal_gui.png^[opacity:"..opacity)
  67
  68                         minetest.localplayer:hud_change(hud_bg_id, "text", "darkness.png^[opacity:"..opacity)
  69
  70                         minetest.localplayer:hud_change(nether_id, "text", "darkness.png^[opacity:"..opacity)
  71                 end
  72         elseif hud_bg_id and hud_id then
  73                 --play spooky sounds
  74                 if init_sound then
  75                         minetest.sound_fade(init_sound, -0.25, 0)
  76                         init_sound = nil
  77                         teleport_sound = minetest.sound_play("portal_teleported",{gain=1,pitch=math.random(70,90)/100})
  78                         minetest.sound_fade(teleport_sound, -0.1, 0)
  79                         teleport_sound = nil
  80                 end
  81                 --player left portal before teleporting
  82                 if cool_off_timer == 0 then
  83                         --make the hud zoom out
  84                         local scale = minetest.localplayer:hud_get(hud_id).scale.x
  85                         if scale < -1 then
  86                                 scale = scale + ((scale/-(1/dtime))*2)
  87                         elseif scale > -1 then
  88                                 scale = -1
  89                         end
  90                         opacity = -scale * 2.55
  91                         minetest.localplayer:hud_change(hud_id, "scale", {x=scale,y=scale})
  92
  93                         minetest.localplayer:hud_change(hud_id, "text", "nether_portal_gui.png^[opacity:"..opacity)
  94
  95                         minetest.localplayer:hud_change(hud_bg_id, "text", "darkness.png^[opacity:"..opacity)
  96
  97                         minetest.localplayer:hud_change(nether_id, "text", "darkness.png^[opacity:"..opacity)
  98
  99                         if scale == -1 then
 100                                 minetest.localplayer:hud_remove(hud_bg_id)
 101                                 minetest.localplayer:hud_remove(hud_id)
 102                                 minetest.localplayer:hud_remove(nether_id)
 103                                 nether_id = nil
 104                                 hud_bg_id = nil
 105                                 hud_id = nil
 106                                 opacity = 0
 107                         end
 108                 --teleport complete animation
 109                 elseif cool_off_timer > 0 then
 110                         local scale = minetest.localplayer:hud_get(nether_id).scale.x
 111                         if scale == 0 then scale = -1 end
 112                         if scale > -100 then
 113                                 scale = scale - ((scale/-(1/dtime))*2)
 114                         elseif scale < -100 then
 115                                 scale = -100
 116                         end
 117
 118                         opacity = (100+scale) * 2.55
 119                         minetest.localplayer:hud_change(nether_id, "scale", {x=scale,y=scale})
 120
 121
 122                         minetest.localplayer:hud_change(hud_id, "text", "nether_portal_gui.png^[opacity:"..opacity)
 123
 124                         minetest.localplayer:hud_change(hud_bg_id, "text", "darkness.png^[opacity:"..opacity)
 125
 126                         minetest.localplayer:hud_change(nether_id, "text", "darkness.png^[opacity:"..opacity)
 127
 128
 129                         if scale == -100 then
 130                                 minetest.localplayer:hud_remove(hud_bg_id)
 131                                 minetest.localplayer:hud_remove(hud_id)
 132                                 minetest.localplayer:hud_remove(nether_id)
 133                                 nether_id = nil
 134                                 hud_bg_id = nil
 135                                 hud_id = nil
 136                                 opacity = 0
 137                         end
 138                 else
 139                         init_sound = nil
 140                 end
 141         elseif hud_bg_id and hud_id then
 142                 minetest.localplayer:hud_remove(hud_bg_id)
 143                 minetest.localplayer:hud_remove(hud_id)
 144                 minetest.localplayer:hud_remove(nether_id)
 145                 nether_id = nil
 146                 hud_bg_id = nil
 147                 hud_id = nil
 148         end
 149
 150         --initialize teleport command to server
 151         if hud_bg_id and hud_id and cool_off_timer == 0 then
 152                 local scale = minetest.localplayer:hud_get(hud_id).scale.x
 153                 if scale == -100 then
 154                         nether:send_all("teleport me")
 155                         --can't use any portal for 6 seconds
 156                         cool_off_timer = 6
 157                 end
 158         end
 159 end)