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Beware the dark [bewarethedark]
=================
A Minetest mod where darkness simply kills you directly
Version: 0.4.0
License:
Code: LGPL 2.1 (see included LICENSE file)
Textures: CC-BY-SA (see http://creativecommons.org/licenses/by-sa/4.0/)
Report bugs or request help on the forum topic.
Description
-----------
This is a mod for MineTest. It's only function is to make
darkness and light a valid mechanic for the default minetest_game.
In other voxel games, darkness is dangerous because it spawns
monsters. In MineTest, darkness just makes it more likely for you
to walk into a tree.
This mod changes that in a very direct fashion: you are damaged
by darkness, the darker the damager. So craft those torches!
Current behavior
----------------
If you stand in a node with light level 7 or less, you slowly
lose "sanity", represented by a hud bar with eyes. The darker it is,
the more sanity you lose per second. When you run out of sanity,
you get damaged instead!
Stand in bright light to replenish sanity. Sunlight is best, but
directly on top of a torch should work, too.
Future plans
------------
None at the moment.
Dependencies
------------
* hud (optional): https://forum.minetest.net/viewtopic.php?f=11&t=6342 (see HUD.txt for configuration)
* hudbars (optional): https://forum.minetest.net/viewtopic.php?f=11&t=11153
Installation
------------
Unzip the archive, rename the folder to to `bewarethedark` and
place it in minetest/mods/
( Linux: If you have a linux system-wide installation place
it in ~/.minetest/mods/. )
( If you only want this to be used in a single world, place
the folder in worldmods/ in your worlddirectory. )
For further information or help see:
http://wiki.minetest.com/wiki/Installing_Mods

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--[[
Beware the Dark configuration
-----------------------------
To modify the configuration without fear of it being overwritten
by an update of this mod, copy this file to
bewarethedark.conf
in the mod directory or the directory of a specific world, and
modify away. The mod will read configuration first from the
default file, then from the mod directory copy, and finally from
the world directory copy.
The settings from these locations will be merged together in an
intelligent fashion. Normal entries in the config table will get
overwritten. Table entries (those with {} at the left of the =)
will get merged together, unless the special table entry 'CLEAR'
is given, with a true value. This merging does not go deeper than
one level, but this should be sufficient.
]]
bewarethedark.config = {
--[[ The period, in seconds, in which this mod updates values.
Changing this will not directly affect other values, but
may change computation load or accuracy.
]]
tick_time = 0.5,
--[[ Damage per second for various light levels, both for hp
and sanity loss. Negative values "heal" sanity, but not
hp.
]]
damage_for_light = {
[15] = -1.0,
[14] = -0.5,
[13] = -0.2, -- the light level for default torches
[12] = 0,
[11] = 0,
[10] = 0,
[ 9] = 0,
[ 8] = 0,
[ 7] = 0.1,
[ 6] = 0.2,
[ 5] = 0.3,
[ 4] = 0.4,
[ 3] = 0.5,
[ 2] = 0.6,
[ 1] = 0.8,
[ 0] = 1.0,
},
--[[ Damage per second for light levels when sanity is 0.
Negative values have no effect.
Any missing value here is taken from the above
'damage_for_light' table. By default, this table
is empty, so both damage tables are effectively the same.
]]
insane_damage_for_light = {
},
}

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--[[
Configuration from default, moddir and worlddir, in that order.
See init.lua for license.
]]
-- change these for other mods
local M = bewarethedark
local modname = 'bewarethedark'
local fileroot = modname
-- make sure config exists; keep constant reference to it
local C = M.config or {}
M.config = C
local function try_config_file(filename)
--print("Config from "..filename)
local file, err = io.open(filename, 'r')
if file then
file:close() -- was just for checking existance
local confcode, err = loadfile(filename)
if confcode then
confcode()
if C ~= M.config then
-- M.config was overriden, merge
for key, value in pairs(M.config) do
if type(value) == 'table' and type(C[key]) == 'table' and not value.CLEAR then
for k, v in pairs(value) do
C[key][k] = value[k]
end
else
-- copy (not a table, or asked to clear)
C[key] = value
end
end
else
-- no override? Empty, or file knows what it is doing.
end
else
minetest.log("error", "Could not load " .. filename .. ": " .. err)
end
end
end
-- read starting configuration from <modname>.default.conf
try_config_file(minetest.get_modpath(modname) .. "/" .. fileroot .. ".default.conf")
-- next, install-specific copy in modpath
try_config_file(minetest.get_modpath(modname) .. "/" .. fileroot .. ".conf")
-- last, world-specific copy in worldpath
try_config_file(minetest.get_worldpath() .. "/" .. fileroot .. ".conf")
-- remove any special keys from tables
for key, value in pairs(C) do
if type(value) == 'table' then
value.CLEAR = nil
end
end
-- write back
M.config = C

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hud?
hudbars?

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--[[
Better HUD config file, without Hunger mod.
This file mirrors the default settings of the Better HUD mod,
except that it moves the "breath" bar upwards to make room
for the "sanity" bar.
Use this config file as a starting point if you *don't* have the
Hunger mod enabled.
For more information, see hud.conf.example in the mods/hud
directory.
]]
HUD_SB_SIZE = { x = 24, y = 24 }
--[[ Layout:
ARMOR | (AIR)
HEALTH | SANITY
]]
HUD_HEALTH_POS = { x = 0.5, y = 1 }
HUD_HEALTH_OFFSET = { x = -262, y = -87 }
-- not used
HUD_HUNGER_POS = { x = 0.5, y = 1 }
HUD_HUNGER_OFFSET = { x = 15, y = -133 }
HUD_AIR_POS = { x = 0.5, y = 1 }
HUD_AIR_OFFSET = { x = 15, y = -110 }
HUD_ARMOR_POS = { x = 0.5, y = 1 }
HUD_ARMOR_OFFSET = { x = -262, y = -110 }
HUD_SANITY_POS = { x = 0.5, y = 1 }
HUD_SANITY_OFFSET = { x = 15, y = -87 }

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--[[
Better HUD config file, with Hunger mod.
This file mirrors the default settings of the Better HUD mod,
except that it moves the "breath" bar upwards to make room
for the "sanity" bar.
Use this config file as a starting point if you *do* have the
Hunger mod enabled.
For more information, see hud.conf.example in the mods/hud
directory.
]]
HUD_SB_SIZE = { x = 24, y = 24 }
--[[ Layout:
(AIR)
ARMOR | SANITY
HEALTH | HUNGER
]]
HUD_HEALTH_POS = { x = 0.5, y = 1 }
HUD_HEALTH_OFFSET = { x = -262, y = -87 }
-- At the time of writing, the Hunger mod contains code to swap
-- the positions of "hunger" and "air", so these positions are
-- "un-swapped"...
HUD_HUNGER_POS = { x = 0.5, y = 1 }
HUD_HUNGER_OFFSET = { x = 15, y = -133 }
HUD_AIR_POS = { x = 0.5, y = 1 }
HUD_AIR_OFFSET = { x = 15, y = -87 }
HUD_ARMOR_POS = { x = 0.5, y = 1 }
HUD_ARMOR_OFFSET = { x = -262, y = -110 }
HUD_SANITY_POS = { x = 0.5, y = 1 }
HUD_SANITY_OFFSET = { x = 15, y = -110 }

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--[[
HUD definitions for Beware the Dark
Optionally from one of the supported mods
Any hud needs to define the following functions:
- bewarethedark.hud_init(player)
Initialize the HUD for a new player.
- bewarethedark.hud_update(player, value)
Display the new value "value" for the given player. "value" is
a floating point number, not necessarily bounded. You can use the
"bewarethedark.hud_clamp(value)" function to get an integer between 0
and 20.
]]
local M = bewarethedark
local C = M.config
local PPA = M.persistent_player_attributes
function M.hud_clamp(value)
if value < 0 then
return 0
elseif value > 20 then
return 20
else
return math.ceil(value)
end
end
if minetest.get_modpath("hudbars") then
hb.register_hudbar('sanity', 0x000000, "Sanity", {
bar = 'bewarethedark_hudbars_bar.png',
icon = 'bewarethedark_eye.png'
}, 20, 20, false)
function M.hud_init(player)
hb.init_hudbar(player, 'sanity',
M.hud_clamp(PPA.get_value(player, 'bewarethedark_sanity')),
20, false)
end
function M.hud_update(player, value)
hb.change_hudbar(player, 'sanity', M.hud_clamp(value), 20)
end
elseif minetest.get_modpath("hud") then
-- default positions follow [hud] defaults
local position = HUD_SANITY_POS or { x=0.5, y=1 }
local offset = HUD_SANITY_OFFSET or { x=15, y=-133} -- above AIR
hud.register('sanity', {
hud_elem_type = "statbar",
position = position,
text = "bewarethedark_eye.png",
background = "bewarethedark_eye_closed.png",
number = 20,
max = 20,
size = HUD_SB_SIZE, -- by default { x=24, y=24 },
offset = offset,
})
function M.hud_init(player)
-- automatic by [hud]
end
function M.hud_update(player, value)
hud.change_item(player, 'sanity', {
number = M.hud_clamp(value)
})
end
else
-- 'builtin' hud
function M.hud_init(player)
-- above breath bar, for now
local name = player:get_player_name()
M.players[name].hud_id = player:hud_add({
hud_elem_type = "statbar",
position = { x=0.5, y=1 },
text = "bewarethedark_eye.png",
number = M.hud_clamp(PPA.get_value(player, 'bewarethedark_sanity')),
direction = 0,
size = { x=24, y=24 },
offset = { x=25, y=-(48+24+16+32)},
})
end
function M.hud_update(player, value)
local name = player:get_player_name()
local hud_id = M.players[name].hud_id
player:hud_change(hud_id, 'number', M.hud_clamp(value))
end
end

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--[[
Beware the Dark [bewarethedark]
==========================
A mod where darkness simply kills you outright.
Copyright (C) 2015 Ben Deutsch <ben@bendeutsch.de>
License
-------
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
USA
]]
bewarethedark = {
-- configuration in bewarethedark.default.conf
-- per-player-stash (not persistent)
players = {
--[[
name = {
pending_dmg = 0.0,
}
]]
},
-- global things
time_next_tick = 0.0,
}
local M = bewarethedark
dofile(minetest.get_modpath('bewarethedark')..'/configuration.lua')
local C = M.config
dofile(minetest.get_modpath('bewarethedark')..'/persistent_player_attributes.lua')
local PPA = M.persistent_player_attributes
dofile(minetest.get_modpath('bewarethedark')..'/hud.lua')
PPA.register({
name = 'bewarethedark_sanity',
min = 0,
max = 20,
default = 20,
})
minetest.register_on_joinplayer(function(player)
local name = player:get_player_name()
local pl = M.players[name]
if not pl then
M.players[name] = { pending_dmg = 0.0 }
pl = M.players[name]
M.hud_init(player)
end
end)
minetest.register_on_respawnplayer(function(player)
local name = player:get_player_name()
local pl = M.players[name]
pl.pending_dmg = 0.0
local sanity = 20
PPA.set_value(player, "bewarethedark_sanity", sanity)
M.hud_update(player, sanity)
end)
minetest.register_globalstep(function(dtime)
M.time_next_tick = M.time_next_tick - dtime
while M.time_next_tick < 0.0 do
M.time_next_tick = M.time_next_tick + C.tick_time
for _,player in ipairs(minetest.get_connected_players()) do
if player:get_hp() <= 0 then
-- dead players don't fear the dark
break
end
local name = player:get_player_name()
local pl = M.players[name]
local pos = player:getpos()
local pos_y = pos.y
-- the middle of the block with the player's head
pos.y = math.floor(pos_y) + 1.5
local node = minetest.get_node(pos)
local light_now = minetest.get_node_light(pos) or 0
if node.name == 'ignore' then
-- can happen while world loads, set to something innocent
light_now = 9
end
local sanity = PPA.get_value(player, "bewarethedark_sanity")
local overflow_factor = 1.0
local dps = C.damage_for_light[light_now] * C.tick_time
--print("Standing in " .. node.name .. " at light " .. light_now .. " taking " .. dps);
if dps ~= 0 then
sanity = sanity - dps
--print("New sanity "..sanity)
if sanity < 0.0 and minetest.setting_getbool("enable_damage") then
-- how much of this tick is hp damage?
overflow_factor = (0.0 - sanity) / dps
sanity = 0.0
end
PPA.set_value(player, "bewarethedark_sanity", sanity)
M.hud_update(player, sanity)
end
-- if insane, hp damage applies
if sanity <= 0.0 then
-- dps for HP potentially other than for sanity
dps = (C.insane_damage_for_light[light_now] or C.damage_for_light[light_now]) * C.tick_time * overflow_factor
if dps < 0.0 then dps = 0.0 end
pl.pending_dmg = pl.pending_dmg + dps
if pl.pending_dmg > 0.0 then
local dmg = math.floor(pl.pending_dmg)
--print("Deals "..dmg.." damage!")
pl.pending_dmg = pl.pending_dmg - dmg
player:set_hp( player:get_hp() - dmg )
end
end
end
end
end)

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--[[
Persistent player attributes
]]
-- change this to inject into other module
local M = bewarethedark
M.persistent_player_attributes = {}
local PPA = M.persistent_player_attributes
--[[
Helper functions that take care of the conversions *and* the
clamping for us
]]
local function _count_for_val(value, def)
local count = math.floor((value - def.min) / (def.max - def.min) * 65535)
if count < 0 then count = 0 end
if count > 65535 then count = 65535 end
return count
end
local function _val_for_count(count, def)
local value = count / 65535 * (def.max - def.min) + def.min
if value < def.min then value = def.min end
if value > def.max then value = def.max end
return value
end
-- end helper functions
-- the stash of registered attributes
PPA.defs = {--[[
name = {
name = "mymod_attr1",
min = 0,
max = 10,
default = 5,
},
]]}
PPA.read_cache = {--[[
player_name = {
attr1 = value1,
attr2 = value2,
},
]]}
--[[
How to register a new attribute, with named parameters:
PPA.register({ name = "mymod_attr1", min = 0, ... })
]]
PPA.register = function(def)
PPA.defs[def.name] = {
name = def.name,
min = def.min or 0.0,
max = def.max or 1.0,
default = def.default or def.min or 0.0,
}
end
-- The on_joinplayer handler
PPA.on_joinplayer = function(player)
local inv = player:get_inventory()
local player_name = player:get_player_name()
PPA.read_cache[player_name] = {}
for name, def in pairs(PPA.defs) do
if inv:get_size(name) == 0 then
inv:set_size(name, 1)
-- set default value
inv:set_stack(name, 1, ItemStack({ name = ":", count = _count_for_val(def.default, def) }))
-- cache default value
PPA.read_cache[player_name][name] = def.default
end
end
end
minetest.register_on_joinplayer(PPA.on_joinplayer)
--[[ get an attribute, procedural style:
local attr1 = PPA.get_value(player, "mymod_attr1")
]]
PPA.get_value = function(player, name)
local player_name = player:get_player_name()
if PPA.read_cache[player_name][name] == nil then
local def = PPA.defs[name]
local inv = player:get_inventory()
local count = inv:get_stack(name, 1):get_count()
PPA.read_cache[player_name][name] = _val_for_count(count, def)
end
return PPA.read_cache[player_name][name]
end
--[[ set an attribute, procedural style:
PPA.set_value(player, "mymod_attr1", attr1)
]]
PPA.set_value = function(player, name, value)
local def = PPA.defs[name]
local inv = player:get_inventory()
local player_name = player:get_player_name()
if value > def.max then value = def.max end
if value < def.min then value = def.min end
PPA.read_cache[player_name][name] = value
inv:set_stack(name, 1, ItemStack({ name = ":", count = _count_for_val(value, def) }))
end

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