Handling wall collisions in GameMaker typically involves checking for potential overlaps between the player (or moving object) and solid objects (walls), and then resolving any detected collisions by adjusting the player's position to prevent the overlap. Below is a basic example of how this can be done using GML (GameMaker Language).
In your player object's step event, you would include collision-checking code:
In this code,
obj_wall represents the object that has been designated as your solid wall. The functions
sin() are used to calculate the movement along the x and y axis based on the
direction variables which you should define according to your game's mechanics.
place_meeting() function checks if the player would collide with a wall at the new position (
y for horizontal and
y+moveY for vertical). If a collision is detected, we use a
while loop and
sign() function to move the player to the edge of the wall without overlapping it.
Please adjust the code above to match your specific needs such as variable names, movement calculations, and collision handling logic.