GMS 2 Looks like I can't load save data, not sure why

Discussion in 'Programming' started by Decent Pretzel, Jan 13, 2020.

  1. Decent Pretzel

    Decent Pretzel Member

    Joined:
    Jan 13, 2020
    Posts:
    1
    My GameMaker version is 2.2.4.474.

    I've made scripts for saving and loading, but nothing happens when I try to load a save. I'm not sure if the issue is in my save or load script. I'm new to Game Maker, so I don't know, maybe the solution's really simple.
    I'm saving data for two maps - "Control_Mode_Map" holds the control setting that the player selected, and "Progress_Map" holds a simple number value for how many levels are beaten. Then I'm saving those maps into a single one I call the "Packet," and that becomes the string for my save file.

    Here's my script for saving:
    Code:
    var Map = argument[0];
    var Space = argument[1];
    var Value = argument[2];
    
    
    if !file_exists ("save.sav") {
        //First, create the Packet
        var Packet = ds_map_create();
        //Second, create the necessary maps and put them into the Packet
        var Control_Mode_Map = ds_map_create();
        ds_map_add_map (Packet, "Control_Mode_Map", Control_Mode_Map);
        var Progress_Map = ds_map_create();
        ds_map_add_map (Packet, "Progress_Map", Progress_Map);
        //Third, put stuff into the maps
        ds_map_add (Control_Mode_Map, "Control_Mode_Space", Control_Mode);
        ds_map_add (Progress_Map, "Progress_Space", Progress);
    }
    
    if file_exists ("save.sav") {
        //First, reopen the Packet
        var Packet = Get_String_From_File ("save.sav");
        //Second, define the correct map
        var Reloaded_Map = Packet [? Map];
        //Third, overwrite the correct value in that map
        ds_map_replace (Reloaded_Map, Space, Value);
    }
    
    //Encode the Packet into a string
    var String = json_encode (Packet);
    //Save the string to the file
    var Buffer = buffer_create (string_byte_length (String) +1, buffer_fixed, 1);
    buffer_write (Buffer, buffer_string, String);
    buffer_save (Buffer, "save.sav");
    buffer_delete (Buffer);
    //Destroy the Packet
    ds_map_destroy (Packet);
    

    Here's my script for loading:
    Code:
    Map = argument[0]
    Space = argument[1]
    Value = argument[2]
    
    if file_exists ("save.sav") {
        var Packet = Get_String_From_File ("save.sav");
        var ReloadedMap = Packet [? Map]
        var ReloadedSpace = ReloadedMap [? Space];
        Value = ReloadedSpace;
        ds_map_destroy (Packet);
    }
    
    And then there's one more script I was calling in the last two: "Get_String_From_File." Here's what that one looks like:
    Code:
    var File = argument[0];
    
    var Buffer = buffer_load (File);
    var String = buffer_read (Buffer, buffer_string);
    buffer_delete (Buffer);
    
    var JSON = json_decode (String);
    return JSON;
    
    I hope my code's easy to follow. Thank you, I'll really appreciate any help.
     

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