Whether you are building a pixel-art platformer, a bullet-hell shooter, or a complex RPG, understanding GML is the difference between a generic prototype and a polished, commercial release. This article is your deep dive into GML—from basic variables to advanced optimization techniques.
// Step Event of obj_player var _x_move = right_key - left_key; // returns -1, 0, or 1 var _y_move = down_key - up_key; gamemaker studio 2 gml
// Animation if (hsp != 0) sprite_index = spr_player_run; image_xscale = sign(hsp); else sprite_index = spr_player_idle; Whether you are building a pixel-art platformer, a
// Flip sprite based on horizontal movement if (h_move != 0) image_xscale = sign(h_move); If it works, // Get sprite dimensions var
to run in debug mode, which allows you to watch variables and pause execution. 3. Feature Branching (Source Control) For a professional "drafting" workflow, enable Source Control GameMaker Manual Create a new (e.g., "draft-inventory-system"). Build the feature entirely on that branch. If it works,
// Get sprite dimensions var _w = sprite_get_width(_sprite); var _h = sprite_get_height(_sprite); var _xc = sprite_get_xoffset(_sprite); var _yc = sprite_get_yoffset(_sprite);
HTML5 has different timing than Windows. Mobile requires touch input.