Hello, I followed Christopho's tuto and I don't understand how to display a small key counter...
The small_key item:
local item = ...
local game = item:get_game()
--small_key option
function item:on_created()
self:set_shadow("small")
self:set_can_disappear(false)
self:set_brandish_when_picked(true)
self:set_sound_when_picked("picked_small_key")
item:set_amount_savegame_variable("small_keys_save")
end
--small_key save
function item:on_obtaining()
item:add_amount(1)
end
Thank you for helping me !
There are several ways to do that. The easiest is to make a small key item that increments a saved value.
And then you need a HUD element that draws this saved value on the screen.
You need to create a menu, and attach it to the HUD script (if you use any).
You can use the savegame variable to display the correct number of small keys
You can look how it is done in MoSDX
Mystery of Solarus DX is quite old, I have more modular examples now.
For example: https://github.com/solarus-games/zelda-xd2-mercuris-chess/blob/dev/data/items/small_key.lua
Which calls code of this script: https://github.com/solarus-games/zelda-xd2-mercuris-chess/blob/dev/data/scripts/equipment.lua
With detection of the current map to know which small key counter to update (basically, which dungeon).
Another way is to make several small key items, one for each dungeon. Same thing for the map, the compass and the big key. A bit easier but very repetitive.
Thank for your answers but I'm really begining in the world of programmation... For now, I'm trying to modifiying the christopho's script for the HUD called rupee but I don't know how it work... I have already check those scripts but it's to complicate (I'm talking about mercuris chess)...
The ruppee code in the tutorial:
-- The money counter shown in the game screen.
local rupees_builder = {}
local rupee_icon_img = sol.surface.create("hud/small_key_icon.png")
function rupees_builder:new(game, config)
local rupees = {}
local digits_text = sol.text_surface.create({
font = "white_digits",
horizontal_alignment = "left",
vertical_alignment = "top",
})
local money_displayed = game:get_money()
local dst_x, dst_y = config.x, config.y
function rupees:on_draw(dst_surface)
local x, y = dst_x, dst_y
local width, height = dst_surface:get_size()
if x < 0 then
x = width + x
end
if y < 0 then
y = height + y
end
rupee_icon_img:draw(dst_surface, x + 8, y)
digits_text:draw(dst_surface, x, y + 10)
end
-- Checks whether the view displays correct information
-- and updates it if necessary.
local function check()
local need_rebuild = false
local money = game:get_money()
local max_money = game:get_max_money()
-- Current money.
if money ~= money_displayed then
need_rebuild = true
if money_displayed < money then
money_displayed = money_displayed + 1
else
money_displayed = money_displayed - 1
end
if money_displayed == money -- The final value was just reached.
or money_displayed % 3 == 0 then -- Otherwise, play sound "rupee_counter_end" every 3 values.
sol.audio.play_sound("rupee_counter_end")
end
end
if digits_text:get_text() == "" then
need_rebuild = true
end
-- Update the text if something has changed.
if need_rebuild then
digits_text:set_text(string.format("%03d", money_displayed))
-- Show in green if the maximum is reached.
if money_displayed == max_money then
digits_text:set_font("green_digits")
else
digits_text:set_font("white_digits")
end
end
return true -- Repeat the timer.
end
-- Periodically check.
check()
sol.timer.start(game, 40, check)
return rupees
end
return rupees_builder
Ok then yes, start with rupees, it is simpler than small keys. What are you trying to modify exactly and what went wrong?
Hmmmm, I do wonder if there is any difference between MoS and MC alteration of these scripts ? because MOS looks simpler ...
I don't really know what I modify... I'm trying with chance. For now I got two counter, one for rupee with rupee's icon and an other rupee's counter with key's icon but I would like it display the number of keys... I have a big problem with variable and the save in solarus... (Where is the variable "money"..., how to use a variable from an item...)
I have used the code you gived to me ("small_key" and "equipment") but now, when I take a key I got an error:
Error: In on_obtaining: [string "items/small_key.lua"]:12: attempt to call method 'add_small_key' (a nil value)
Why ?... What sort of things I need to do to make it work well ?! :-\
It is explained in the comments of equipment.lua. You need to require("scripts/equipment.lua") at least once. I usually do it from scripts/features.lua
Quote from: dpro_games on April 05, 2017, 06:51:25 AM
(Where is the variable "money"..., how to use a variable from an item...)
game:get_money()
Quote from: dpro_games on April 05, 2017, 06:51:25 AM
(how to use a variable from an item...)
item:get_amount()
But small keys are more compilcated since we want different small key counters in each dungeon. Start with something easier like rupees or the bow and arrows.
It's not possible to have a simple script for the keys ? I don't want to have different key counters in each dungeon... I can't just have a really simple key counter like rupee but for the key ?
Well that's exacty the purpose of my equipment.lua script. It provides a function game:get_num_small_keys() so that it is very easy for the HUD.
Je peux parler fr ce sera plus simple ?
Oui pas de souci :)
En fait, je commence vraiment la programmation et là, çà fait déjà plusieurs semaine que je bloque sur le système de clé avec le HUD... Donc en gros je ne comprend rien au script "equipment" (je doit supprimer quoi pour faire le truc le plus simple possible) et où je doit placer le require de ce script ? Vraiment merci d'accorder du temps au nouveau développeur !
Donc si je comprends bien tu veux faire un item dont le seul effet est d'augmenter un compteur sauvegardé.
C'est en effet beaucoup plus simple si tu n'as pas de compteurs différents dans chaque donjon. Dans ce cas oublie mon script equipment.lua.
C'est comme l'item rubis, sauf qu'au lieu de game:add_money() tu incrémentes un compteur à toi.
local item = ...
function item:on_obtaining(variant, savegame_variable)
local count = game:get_value("num_small_keys") or 0
game:set_value("num_small_keys", count + 1)
end
Est-ce que le code cet item est clair ?
Et ton HUD n'a plus qu'à afficher la valeur de game:get_value("num_small_keys").
Il y a encore un problème quand je prend une clé, j'ai une erreur différente maintenant :
Error: In on_obtaining: [string "items/small_key.lua"]:12: attempt to index global 'game' (a nil value)
Ah oui, j'ai oublié de mettre une ligne local game = item:get_game().
Mais ça il faudrait savoir le corriger à l'aide du message d'erreur.
Ca marche !! Merci beaucoup !! :)
J'ai de nouveau un problème au niveau du HUD cette fois, mais il me semble que j'ai presque réussis...
Le code du HUD pour la small_key :
-- The small_key counter shown in the game screen.
local small_key_builder = {}
local small_key_icon_img = sol.surface.create("hud/small_key_icon.png")
function small_key_builder:new(game, config)
local small_key = {}
local digits_text = sol.text_surface.create({
font = "white_digits",
horizontal_alignment = "left",
vertical_alignment = "top",
})
local small_key_displayed = game:get_value("small_keys_save")
local dst_x, dst_y = config.x, config.y
function small_key:on_draw(dst_surface)
local x, y = dst_x, dst_y
local width, height = dst_surface:get_size()
if x < 0 then
x = width + x
end
if y < 0 then
y = height + y
end
small_key_icon_img:draw(dst_surface, x + 8, y)
digits_text:draw(dst_surface, x, y + 10)
end
end
return small_key_builder
Mais j'ai une erreur :
Error: In on_started: [string "scripts/hud/hud.lua"]:21: attempt to index local 'element' (a nil value)
Voici le script de la clé :
local item = ...
local game = item:get_game()
function item:on_created()
self:set_shadow("small")
self:set_brandish_when_picked(false)
self:set_sound_when_picked("picked_small_key")
end
function item:on_obtaining(variant, savegame_variable)
local count = game:get_value("small_keys_save") or 0
game:set_value("small_keys_save", count + 1)
end
Tu nous montres deux fichiers mais pas celui pointé dans le message d'erreur...
Ah oui pardon, je suis débile... ;D
-- Script that creates a head-up display for a game.
-- Usage:
-- require("scripts/hud/hud")
require("scripts/multi_events")
local hud_config = require("scripts/hud/hud_config")
-- Creates and runs a HUD for the specified game.
local function initialize_hud_features(game)
-- Set up the HUD.
local hud = {
enabled = false,
elements = {},
}
for _, element_config in ipairs(hud_config) do
local element_builder = require(element_config.menu_script)
local element = element_builder:new(game, element_config)
if element.set_dst_position ~= nil then
-- Compatibility with old HUD element scripts
-- whose new() method don't take a config parameter.
element:set_dst_position(element_config.x, element_config.y)
end
hud.elements[#hud.elements + 1] = element
end
-- Destroys the HUD.
function hud:quit()
if hud:is_enabled() then
-- Stop all HUD elements.
hud:set_enabled(false)
end
end
-- Returns whether the HUD is currently enabled.
function hud:is_enabled()
return hud.enabled
end
-- Enables or disables the HUD.
function hud:set_enabled(enabled)
if enabled ~= hud.enabled then
hud.enabled = enabled
for _, menu in ipairs(hud.elements) do
if enabled then
-- Start each HUD element.
sol.menu.start(game, menu)
else
-- Stop each HUD element.
sol.menu.stop(menu)
end
end
end
end
-- Returns whether the HUD is currently shown.
function game:is_hud_enabled()
return hud:is_enabled()
end
-- Enables or disables the HUD.
function game:set_hud_enabled(enable)
return hud:set_enabled(enable)
end
-- Call this function to notify the HUD that the current map has changed.
local function hud_on_map_changed(game, map)
if hud:is_enabled() then
for _, menu in ipairs(hud.elements) do
if menu.on_map_changed ~= nil then
menu:on_map_changed(map)
end
end
end
end
-- Call this function to notify the HUD that the game was just paused.
local function hud_on_paused(game)
if hud:is_enabled() then
for _, menu in ipairs(hud.elements) do
if menu.on_paused ~= nil then
menu:on_paused()
end
end
end
end
-- Call this function to notify the HUD that the game was just unpaused.
local function hud_on_unpaused(game)
if hud:is_enabled() then
for _, menu in ipairs(hud.elements) do
if menu.on_unpaused ~= nil then
menu:on_unpaused()
end
end
end
end
game:register_event("on_map_changed", hud_on_map_changed)
game:register_event("on_paused", hud_on_paused)
game:register_event("on_unpaused", hud_on_unpaused)
-- Start the HUD.
hud:set_enabled(true)
end
-- Set up the HUD features on any game that starts.
local game_meta = sol.main.get_metatable("game")
game_meta:register_event("on_started", initialize_hud_features)
return true
Dans la fonction small_key_builder:new() tu as oublié de retourner le menu que tu viens de créer. Donc element est nil.
Juste, comment faire pour que ma variable qui compte les clés soit égale a zéro aux début du jeu et pas a "nil" ?
Une astuce est de faire comme mon code plus beau :
local count = game:get_value("small_keys_save") or 0
Rajouter "or 0" au bout pour initialiser à 0 si c'est nil.
Autre solution, initialiser au début du jeu (dans initial_game.lua) mais je me vois mal initialiser toutes les futures variables du jeu dès le départ.
Ça marche enfin !! ;D
Vraiment merci de m'avoir accordé du temps pour m'aider ! J'ai compris plein de chose sur le fonctionnement de Solarus !
Et un gros GG pour avoir conçu le moteur de mes rêve: Solarus ! :)
Content que tu aies compris et pas juste reproduit du coup ^^
Tu vas pouvoir continuer à progresser :)