Add helper functions to make tool usable n times (#12047)

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Wuzzy 2022-06-03 19:47:04 +00:00 committed by GitHub
parent 6d163b72dc
commit 6a6b579c54
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7 changed files with 60 additions and 3 deletions

@ -3590,6 +3590,12 @@ Helper functions
* `minetest.pointed_thing_to_face_pos(placer, pointed_thing)`: returns a
position.
* returns the exact position on the surface of a pointed node
* `minetest.get_tool_wear_after_use(uses [, initial_wear])`
* Simulates a tool being used once and returns the added wear,
such that, if only this function is used to calculate wear,
the tool will break exactly after `uses` times of uses
* `uses`: Number of times the tool can be used
* `initial_wear`: The initial wear the tool starts with (default: 0)
* `minetest.get_dig_params(groups, tool_capabilities [, wear])`:
Simulates an item that digs a node.
Returns a table with the following fields:
@ -6525,7 +6531,13 @@ an itemstring, a table or `nil`.
or those of the hand if none are defined for this item type
* `add_wear(amount)`
* Increases wear by `amount` if the item is a tool, otherwise does nothing
* Valid `amount` range is [0,65536]
* `amount`: number, integer
* `add_wear_by_uses(max_uses)`
* Increases wear in such a way that, if only this function is called,
the item breaks after `max_uses` times
* Valid `max_uses` range is [0,65536]
* Does nothing if item is not a tool or if `max_uses` is 0
* `add_item(item)`: returns leftover `ItemStack`
* Put some item or stack onto this stack
* `item_fits(item)`: returns `true` if item or stack can be fully added to

@ -343,7 +343,7 @@ int LuaItemStack::l_get_tool_capabilities(lua_State *L)
}
// add_wear(self, amount) -> true/false
// The range for "amount" is [0,65535]. Wear is only added if the item
// The range for "amount" is [0,65536]. Wear is only added if the item
// is a tool. Adding wear might destroy the item.
// Returns true if the item is (or was) a tool.
int LuaItemStack::l_add_wear(lua_State *L)
@ -357,6 +357,25 @@ int LuaItemStack::l_add_wear(lua_State *L)
return 1;
}
// add_wear_by_uses(self, max_uses) -> true/false
// The range for "max_uses" is [0,65536].
// Adds wear to the item in such a way that, if
// only this function is called to add wear, the item
// will be destroyed exactly after `max_uses` times of calling it.
// No-op if `max_uses` is 0 or item is not a tool.
// Returns true if the item is (or was) a tool.
int LuaItemStack::l_add_wear_by_uses(lua_State *L)
{
NO_MAP_LOCK_REQUIRED;
LuaItemStack *o = checkobject(L, 1);
ItemStack &item = o->m_stack;
u32 max_uses = readParam<int>(L, 2);
u32 add_wear = calculateResultWear(max_uses, item.wear);
bool result = item.addWear(add_wear, getGameDef(L)->idef());
lua_pushboolean(L, result);
return 1;
}
// add_item(self, itemstack or itemstring or table or nil) -> itemstack
// Returns leftover item stack
int LuaItemStack::l_add_item(lua_State *L)
@ -532,6 +551,7 @@ const luaL_Reg LuaItemStack::methods[] = {
luamethod(LuaItemStack, get_definition),
luamethod(LuaItemStack, get_tool_capabilities),
luamethod(LuaItemStack, add_wear),
luamethod(LuaItemStack, add_wear_by_uses),
luamethod(LuaItemStack, add_item),
luamethod(LuaItemStack, item_fits),
luamethod(LuaItemStack, take_item),

@ -108,11 +108,20 @@ private:
static int l_get_tool_capabilities(lua_State *L);
// add_wear(self, amount) -> true/false
// The range for "amount" is [0,65535]. Wear is only added if the item
// The range for "amount" is [0,65536]. Wear is only added if the item
// is a tool. Adding wear might destroy the item.
// Returns true if the item is (or was) a tool.
static int l_add_wear(lua_State *L);
// add_wear_by_uses(self, max_uses) -> true/false
// The range for "max_uses" is [0,65536].
// Adds wear to the item in such a way that, if
// only this function is called to add wear, the item
// will be destroyed exactly after `max_uses` times of calling it.
// No-op if `max_uses` is 0 or item is not a tool.
// Returns true if the item is (or was) a tool.
static int l_add_wear_by_uses(lua_State *L);
// add_item(self, itemstack or itemstring or table or nil) -> itemstack
// Returns leftover item stack
static int l_add_item(lua_State *L);

@ -159,6 +159,17 @@ int ModApiUtil::l_write_json(lua_State *L)
return 1;
}
// get_tool_wear_after_use(uses[, initial_wear])
int ModApiUtil::l_get_tool_wear_after_use(lua_State *L)
{
NO_MAP_LOCK_REQUIRED;
u32 uses = readParam<int>(L, 1);
u16 initial_wear = readParam<int>(L, 2, 0);
u16 wear = calculateResultWear(uses, initial_wear);
lua_pushnumber(L, wear);
return 1;
}
// get_dig_params(groups, tool_capabilities[, wear])
int ModApiUtil::l_get_dig_params(lua_State *L)
{
@ -586,6 +597,7 @@ void ModApiUtil::Initialize(lua_State *L, int top)
API_FCT(parse_json);
API_FCT(write_json);
API_FCT(get_tool_wear_after_use);
API_FCT(get_dig_params);
API_FCT(get_hit_params);

@ -50,6 +50,9 @@ private:
// write_json(data[, styled])
static int l_write_json(lua_State *L);
// get_tool_wear_after_use(uses[, initial_wear])
static int l_get_tool_wear_after_use(lua_State *L);
// get_dig_params(groups, tool_capabilities[, wear])
static int l_get_dig_params(lua_State *L);

@ -183,7 +183,7 @@ void ToolCapabilities::deserializeJson(std::istream &is)
}
}
static u32 calculateResultWear(const u32 uses, const u16 initial_wear)
u32 calculateResultWear(const u32 uses, const u16 initial_wear)
{
if (uses == 0) {
// Trivial case: Infinite uses

@ -142,4 +142,5 @@ PunchDamageResult getPunchDamage(
u16 initial_wear = 0
);
u32 calculateResultWear(const u32 uses, const u16 initial_wear);
f32 getToolRange(const ItemDefinition &def_selected, const ItemDefinition &def_hand);