move_contact_all

This function will move the instance running the code a set number of pixels in the specified direction until it meets any other instance with a valid mask. You can use -1 or 0 for the maxdist being a default 1000px, ie: GameMaker will move the instance continually up 1000 pixels until it is out of collision.

Syntax:

move_contact_all(dir, maxdist);

Returns:

N/A

Example:

if (!place_meeting(x, y + 1, all))
{
    move_contact_all(270, -1);
}

The above code will check beneath the instance for a collision, and if there is none, then it will move it down until there is or until 1000pixels have been covered.