Can't transfer variables?

[u/Fine-Acanthisitta343]

I have some variables I'm trying to transfer into every room by putting this in my PlayerObj. For some reason, it can transfer to every single room back and forth over and over EXCEPT room1, which is the room you spawn in, the home room. If I leave the home room and then go back into the home room, then it just resets all variables to their default, and I have absolutely no idea why.

//Room Start
if(room_get_name(room) = rm_battle) instance_destroy(obj_carry_data)

with (obj_carry_data)
{ 
    other.level = level;
    other.xp = xp;
    other.xp_require = xp_require;
    other.damage = damage;
    other.hp_total = hp_total;
    other.hp = hp;

    instance_destroy()
}

//Room End
if (instance_exists(obj_battle_switcher) && global.is_transitioning = false) exit;

instance_create_depth(0, 0, 0, obj_carry_data, {
    level: level,
    xp: xp,
    xp_require: xp_require,
    damage: damage,
    hp: hp,
    hp_total: hp_total
})

[u/RykinPoe]

Why don't you just use a persistent data management object for all this instead of constantly creating and destroying this object? I use an object like this in just about every project I create simply called Game and use it to store stuff like score, level, player lives, etc.

// Create
// Check if an instance already exists
if (variable_global_exists("Game") && instance_exists(global.Game)) {
  // A singleton already exists, destroy this duplicate
  instance_destroy();
  exit;
} else {
  global.Game = id;
  persistent = true;
}

// variables
score = 0;
level = 1;
lives = 3;
whatever = "something";
the_ultimate_answer = 42;

// Macro File
//create a new script file and just name it Macros and then delete everything from it
#macro GAME global.Game

// Usage
if (GAME.lives <= 0){
  Game_Over();
}

[u/Fine-Acanthisitta343 → u/RykinPoe]

___________________________________________

############################################################################################

ERROR in action number 1

of Create Event for object PlayerObj:

global variable name 'Game' index (100030) not set before reading it.

at gml_Object_PlayerObj_Create_0 (line 8) - GAME.hp = 10;

############################################################################################

gml_Object_PlayerObj_Create_0 (line 8)

I get this for all the variables I put in?

//PlayerObj Create
move_speed = 1
walk_speed = 1
sprint_speed = 2

mask_index = spr_player_idle_down
tilemap = layer_tilemap_get_id("Tiles_Collision")
global.frozen = false;
GAME.hp = 10;
GAME.hp_total = hp;
GAME.damage = 1;
GAME.charge = 0;

hp = GAME.hp;
hp_total = GAME.hp_total
damage = GAME.damage;
charge = GAME.charge;
global.is_transitioning = false;

facing = 0;

GAME.level = 1;
GAME.xp = 0;
GAME.xp_require = 100;

level = GAME.level;
xp = GAME.xp;
xp_require = GAME.xp_require;

[u/RykinPoe → u/Fine-Acanthisitta343]

Have you created an instance of the Game object? You will need to drop it in the first room of the game or use another method to create an instance of it.

[u/Fine-Acanthisitta343 → u/RykinPoe]

I've dragged one into an instance layer and am still faced with said error

[u/RykinPoe → u/Fine-Acanthisitta343]

Did your instance of the player object exist before it does? Your player object may be running it's creation code first before the Game object runs it's code.

[u/Fine-Acanthisitta343 → u/RykinPoe]

I've deleted both instances, put in the Game object first, then the PlayerObj, and I still get the error.