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Add minetest.register_on_player_hpchange
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e50aa4ed06
commit
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@ -407,6 +407,34 @@ local function make_registration_wrap(reg_fn_name, clear_fn_name)
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return list
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end
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core.registered_on_player_hpchanges = { modifiers = { }, loggers = { } }
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function core.registered_on_player_hpchange(player, hp_change)
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local last = false
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for i = #core.registered_on_player_hpchanges.modifiers, 1, -1 do
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local func = core.registered_on_player_hpchanges.modifiers[i]
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hp_change, last = func(player, hp_change)
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if type(hp_change) ~= "number" then
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local debuginfo = debug.getinfo(func)
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error("The register_on_hp_changes function has to return a number at " ..
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debuginfo.short_src .. " line " .. debuginfo.linedefined)
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end
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if last then
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break
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end
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end
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for i, func in ipairs(core.registered_on_player_hpchanges.loggers) do
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func(player, hp_change)
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end
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return hp_change
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end
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function core.register_on_player_hpchange(func, modifier)
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if modifier then
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table.insert(core.registered_on_player_hpchanges.modifiers, func)
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else
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table.insert(core.registered_on_player_hpchanges.loggers, func)
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end
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end
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core.registered_biomes = make_registration_wrap("register_biome", "clear_registered_biomes")
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core.registered_ores = make_registration_wrap("register_ore", "clear_registered_ores")
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core.registered_decorations = make_registration_wrap("register_decoration", "clear_registered_decorations")
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@ -1785,6 +1785,13 @@ Call these functions only at load time!
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the puncher to the punched.
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* `damage` - number that represents the damage calculated by the engine
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* should return `true` to prevent the default damage mechanism
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* `minetest.register_on_player_hpchange(func(player, hp_change), modifier)`
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* Called when the player gets damaged or healed
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* `player`: ObjectRef of the player
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* `hp_change`: the amount of change. Negative when it is damage.
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* `modifier`: when true, the function should return the actual hp_change.
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Note: modifiers only get a temporary hp_change that can be modified by later modifiers.
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modifiers can return true as a second argument to stop the execution of further functions.
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* `minetest.register_on_respawnplayer(func(ObjectRef))`
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* Called when player is to be respawned
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* Called _before_ repositioning of player occurs
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@ -1125,6 +1125,12 @@ void PlayerSAO::setHP(s16 hp)
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{
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s16 oldhp = m_player->hp;
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s16 hp_change = m_env->getScriptIface()->on_player_hpchange(this,
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hp - oldhp);
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if (hp_change == 0)
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return;
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hp = oldhp + hp_change;
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if (hp < 0)
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hp = 0;
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else if (hp > PLAYER_MAX_HP)
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@ -69,6 +69,25 @@ bool ScriptApiPlayer::on_punchplayer(ServerActiveObject *player,
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return lua_toboolean(L, -1);
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}
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s16 ScriptApiPlayer::on_player_hpchange(ServerActiveObject *player,
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s16 hp_change)
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{
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SCRIPTAPI_PRECHECKHEADER
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// Get core.registered_on_player_hpchange
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lua_getglobal(L, "core");
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lua_getfield(L, -1, "registered_on_player_hpchange");
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lua_remove(L, -2);
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objectrefGetOrCreate(L, player);
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lua_pushnumber(L, hp_change);
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if (lua_pcall(L, 2, 1, m_errorhandler))
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scriptError();
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hp_change = lua_tointeger(L, -1);
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lua_pop(L, -1);
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return hp_change;
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}
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bool ScriptApiPlayer::on_respawnplayer(ServerActiveObject *player)
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{
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SCRIPTAPI_PRECHECKHEADER
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@ -43,6 +43,7 @@ public:
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bool on_punchplayer(ServerActiveObject *player,
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ServerActiveObject *hitter, float time_from_last_punch,
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const ToolCapabilities *toolcap, v3f dir, s16 damage);
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s16 on_player_hpchange(ServerActiveObject *player, s16 hp_change);
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void on_playerReceiveFields(ServerActiveObject *player,
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const std::string &formname, const StringMap &fields);
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};
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