(Deducting one point for occasional IDE bugginess and a historically confusing pricing structure, though the language itself is a 10/10 for beginners).
Runs exactly once when an instance of an object is born. Perfect for initializing variables.
To ensure your game maintains a locked 60 FPS across target platforms like PC, consoles, and mobile devices, integrate these patterns early into your coding workflow:
: GML now includes full exception handling to test code and prevent games from crashing upon encountering fatal errors. gamemaker studio 2 gml
The 2.3 update modernized GML significantly. Gone are the clunky legacy functions ( ds_list_add ). We now have real arrays and structs.
// If statement if (keyboard_check(vk_space) && jumps > 0) vspeed = -10; jumps--;
Handles how the object renders visually on the screen. If you write code here, it overrides the default sprite drawing. (Deducting one point for occasional IDE bugginess and
The Step Event: This is the heartbeat of your game. It runs every single frame (usually 60 times per second). This is where you put logic for movement, input detection, and collision checks.
// Creating a stats lookup map enemy_stats = ds_map_create(); ds_map_add(enemy_stats, "hp", 50); ds_map_add(enemy_stats, "defense", 10); // Always destroy data structures when done to avoid memory leaks! ds_map_destroy(enemy_stats); Use code with caution.
// 1. Get input from keyboard var _key_right = keyboard_check(vk_right) || keyboard_check(ord("D")); var _key_left = keyboard_check(vk_left) || keyboard_check(ord("A")); var _key_up = keyboard_check(vk_up) || keyboard_check(ord("W")); var _key_down = keyboard_check(vk_down) || keyboard_check(ord("S")); // 2. Calculate movement direction var _h_input = _key_right - _key_left; // Results in -1 (left), 1 (right), or 0 (stationary) var _v_input = _key_down - _key_up; // Results in -1 (up), 1 (down), or 0 (stationary) // 3. Move the player using built-in x and y variables if (_h_input != 0 || _v_input != 0) // Calculate vector angle var _dir = point_direction(0, 0, _h_input, _v_input); // Apply speed evenly across diagonal movement x += lengthdir_x(move_speed, _dir); y += lengthdir_y(move_speed, _dir); Use code with caution. Deconstructing the Code: To ensure your game maintains a locked 60
// 1D Array inventory = ["sword", "shield", "potion"];
Don't try to build a sprawling MMORPG for your first project. Start with classic arcade games like Pong , Flappy Bird , or Space Invaders . This ensures you learn core concepts like movement, collision, and scoring before moving on to complex mechanics.