Add minetest.register_on_player_hpchange

This commit is contained in:
TeTpaAka 2015-05-30 16:56:42 +02:00 committed by est31
parent e50aa4ed06
commit aa13baa30a
5 changed files with 61 additions and 0 deletions

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@ -407,6 +407,34 @@ local function make_registration_wrap(reg_fn_name, clear_fn_name)
return list
end
core.registered_on_player_hpchanges = { modifiers = { }, loggers = { } }
function core.registered_on_player_hpchange(player, hp_change)
local last = false
for i = #core.registered_on_player_hpchanges.modifiers, 1, -1 do
local func = core.registered_on_player_hpchanges.modifiers[i]
hp_change, last = func(player, hp_change)
if type(hp_change) ~= "number" then
local debuginfo = debug.getinfo(func)
error("The register_on_hp_changes function has to return a number at " ..
debuginfo.short_src .. " line " .. debuginfo.linedefined)
end
if last then
break
end
end
for i, func in ipairs(core.registered_on_player_hpchanges.loggers) do
func(player, hp_change)
end
return hp_change
end
function core.register_on_player_hpchange(func, modifier)
if modifier then
table.insert(core.registered_on_player_hpchanges.modifiers, func)
else
table.insert(core.registered_on_player_hpchanges.loggers, func)
end
end
core.registered_biomes = make_registration_wrap("register_biome", "clear_registered_biomes")
core.registered_ores = make_registration_wrap("register_ore", "clear_registered_ores")
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!
the puncher to the punched.
* `damage` - number that represents the damage calculated by the engine
* should return `true` to prevent the default damage mechanism
* `minetest.register_on_player_hpchange(func(player, hp_change), modifier)`
* Called when the player gets damaged or healed
* `player`: ObjectRef of the player
* `hp_change`: the amount of change. Negative when it is damage.
* `modifier`: when true, the function should return the actual hp_change.
Note: modifiers only get a temporary hp_change that can be modified by later modifiers.
modifiers can return true as a second argument to stop the execution of further functions.
* `minetest.register_on_respawnplayer(func(ObjectRef))`
* Called when player is to be respawned
* Called _before_ repositioning of player occurs

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@ -1125,6 +1125,12 @@ void PlayerSAO::setHP(s16 hp)
{
s16 oldhp = m_player->hp;
s16 hp_change = m_env->getScriptIface()->on_player_hpchange(this,
hp - oldhp);
if (hp_change == 0)
return;
hp = oldhp + hp_change;
if (hp < 0)
hp = 0;
else if (hp > PLAYER_MAX_HP)

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@ -69,6 +69,25 @@ bool ScriptApiPlayer::on_punchplayer(ServerActiveObject *player,
return lua_toboolean(L, -1);
}
s16 ScriptApiPlayer::on_player_hpchange(ServerActiveObject *player,
s16 hp_change)
{
SCRIPTAPI_PRECHECKHEADER
// Get core.registered_on_player_hpchange
lua_getglobal(L, "core");
lua_getfield(L, -1, "registered_on_player_hpchange");
lua_remove(L, -2);
objectrefGetOrCreate(L, player);
lua_pushnumber(L, hp_change);
if (lua_pcall(L, 2, 1, m_errorhandler))
scriptError();
hp_change = lua_tointeger(L, -1);
lua_pop(L, -1);
return hp_change;
}
bool ScriptApiPlayer::on_respawnplayer(ServerActiveObject *player)
{
SCRIPTAPI_PRECHECKHEADER

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@ -43,6 +43,7 @@ public:
bool on_punchplayer(ServerActiveObject *player,
ServerActiveObject *hitter, float time_from_last_punch,
const ToolCapabilities *toolcap, v3f dir, s16 damage);
s16 on_player_hpchange(ServerActiveObject *player, s16 hp_change);
void on_playerReceiveFields(ServerActiveObject *player,
const std::string &formname, const StringMap &fields);
};