Game Maker Language is an actively used programming language created in 1999. The language historically tries to accommodate different programming backgrounds and styles - BASIC/Lua style "and" / "or" keywords can be used interchangeably with C-style "&&" / "||" operators; parentheses around conditions in if-statements and loops can be omitted; semicolons are largely optional[26] (insertion happens at the end of statement; compile error is raised in case of ambiguity). The language's default mode of operation on native platforms is via a stack machine; it can also be source-to-source compiled to C++ via LLVM for higher performance.[27] On HTML5, GML is source-to-source compiled to JavaScript with optimizations and minification applied in non-debug builds.

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  • Game Maker Language first appeared in 1999
  • file extensions for Game Maker Language include gml
  • Have a question about Game Maker Language not answered here? Email me and let me know how I can help.

Example code from the Hello World Collection:

// Hello World in GML (Game Maker Language)
draw_text(10,10,"Hello World")

Example code from Linguist:

  Builds and sends the actual piwik tracking request
  Copyright (c) 2015 John Hatch
  Licenced under the MIT licence:

// Source -

//Build argument map
   var args = ds_map_create();
   // Populate GET arguments to Piwik HTTP API
   // See full HTTP API reference at
   //Required args
   ds_map_add(args, "idsite", string(_Piwik_idsite));
   ds_map_add(args, "rec", "1");
   ds_map_add(args, "url", _piwikUrlEncode(_Piwik_baseurl + "/" + room_get_name(room)));
   ds_map_add(args, "apiv", "1");
   ds_map_add(args, "_id", _piwikUrlEncode(_Piwik_id));
   ds_map_add(args, "rand", _piwikUrlEncode( string(round(random(999999999)+game_id)) ));
   //ds_map_add(args, "new_visit", "0");
   //Pass local time to API
   var ctz = date_get_timezone();
   var now = date_current_datetime();
   ds_map_add(args, "h", _piwikUrlEncode(string(date_get_hour(now))));
   ds_map_add(args, "m", _piwikUrlEncode(string(date_get_minute(now))));
   ds_map_add(args, "s", _piwikUrlEncode(string(date_get_second(now))));
   // Add any other arguments passed to script in the form "param=value" to the http arg map
   var arg_keyval;
   for (var i=0; i<argument_count; i++)
    arg_keyval = _piwikStringExplode(argument[i],'=');
    ds_map_add(args, arg_keyval[0], _piwikUrlEncode(string(arg_keyval[1])));

//Build argument string
   var argstring = "";
   var prevkey = ds_map_find_first(args);
   argstring += (prevkey + "=" + args[? prevkey] + "&");
   repeat (ds_map_size(args)-1)
    prevkey = ds_map_find_next(args, prevkey);
    argstring += (prevkey + "=" + args[? prevkey] + "&");

//Append query string to ds_list of requests to be sent at End Step. 
ds_list_add(_PIWIK_REQS, "?" + argstring);

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Last updated June 22nd, 2020

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