123 lines
3.4 KiB
Lua
123 lines
3.4 KiB
Lua
--[[
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Damage mod. This mod introduces a custom "damage" mechanic for players.
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It is completely separate from Luanti's built-in health system,
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which is ignored in this game.
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Players can have 0 to lzr_damage.MAX_DAMAGE. Damage in this mod is
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just a visual effect on the screen but has no gameplay effect on its own.
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But it can be queried when the player has reached a certain damage.
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Damage is never lethal.
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The player damage can be added to, or reset to 0. When the player has
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damage, it will slowly be reduced to 0 again.
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Damage is mostly useful as an effect to simulate the player being
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"hurt" without
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]]
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lzr_damage = {}
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-- Note this game does NOT use regular damage and health, as defined
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-- by Luanti, it's disabled. The "damage" here applies only to this mod!
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lzr_damage.MAX_DAMAGE = 4
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-- Reduce damage when player didn't take damage every HEAL_TIME
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-- seconds.
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local HEAL_TIME = 3.0
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-- Player damage increases roughly every second the player is in danger,
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-- and decreases while out of danger
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local player_damage = 0
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-- Count the time for how many consecutive seconds the player did
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-- not take damage yet.
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local safe_timer = 0
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local damage_screen
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local update_damage_screen = function(player)
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if player_damage == 0 then
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if damage_screen then
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player:hud_remove(damage_screen)
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damage_screen = nil
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end
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else
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local texture = "lzr_damage_screen_"..player_damage..".png"
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if not damage_screen then
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damage_screen = player:hud_add({
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type = "image",
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scale = { x = -100, y = -100 },
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text = texture,
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alignment = { x = 1, y = 1 },
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position = { x = 0, y = 0 },
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z_index = -400,
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})
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else
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player:hud_change(damage_screen, "text", texture)
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end
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end
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end
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lzr_damage.reset_player_damage = function(player)
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player_damage = 0
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update_damage_screen(player)
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end
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lzr_damage.damage_player = function(player, damage)
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safe_timer = 0
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player_damage = player_damage + (damage or 1)
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if player_damage > lzr_damage.MAX_DAMAGE then
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player_damage = lzr_damage.MAX_DAMAGE
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end
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local gain
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if player_damage >= 3 then
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gain = 1
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elseif player_damage >= 2 then
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gain = 0.7
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else
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gain = 0.4
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end
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local texture = "lzr_damage_screen_"..player_damage..".png"
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update_damage_screen(player)
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minetest.sound_play({name="lzr_damage_damage", gain=gain}, {to_player=player:get_player_name()}, true)
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end
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local undamage_player = function(player)
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player_damage = math.max(0, player_damage - 1)
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update_damage_screen(player)
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end
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lzr_damage.get_player_damage = function(player)
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return player_damage
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end
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-- Slowly reduce damage to 0 when player hasn’t been
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-- damaged for a while.
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minetest.register_globalstep(function(dtime)
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safe_timer = safe_timer + dtime
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if safe_timer < HEAL_TIME then
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return
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end
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safe_timer = 0
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local players = minetest.get_connected_players()
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local state = lzr_gamestate.get_state()
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if state ~= lzr_gamestate.LEVEL and state ~= lzr_gamestate.LEVEL_COMPLETE and state ~= lzr_gamestate.LEVEL_TEST then
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return
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end
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for p=1, #players do
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local player = players[p]
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undamage_player(player)
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end
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end)
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-- Reset player damage when entering any state but the level states
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lzr_gamestate.register_on_enter_state(function(new_state)
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if new_state ~= lzr_gamestate.LEVEL and new_state ~= lzr_gamestate.LEVEL_COMPLETE and new_state ~= lzr_gamestate.LEVEL_TEST then
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local player = minetest.get_player_by_name("singleplayer")
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if player then
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lzr_damage.reset_player_damage(player)
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end
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end
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end)
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