|real||Sets the number of horizontal cells in the array|
|real||Sets the number of vertical cells in the array|
|real/string||Optional: Sets a value to assign to all new cells (default 0)|
Creates and returns a 2D array of the given with and height, optionally assigning a custom default value to each index.
Theoretically, this can be achieved in vanilla GML by declaring a 2D arrray with a single value assigned to the maximum desired index in either axis. However, many export modules do not recognize this form of declaration, resulting in crashes. By contrast, GML+ uses a safe method to initialize every cell in order to avoid errors.