Designing Games with Game Maker - YoYo Games

action it lets the instance take a step towards a particular position. But in this case it tries to
avoid obstacles. When the instance would run into a solid instance (or any instance) it will
change the direction of motion to try to avoid the instance and move around it. The approach
is not guaranteed to work but in most easy cases it will effectively move the instance towards
the goal. For more complicated cases, there are motion planning functions. You specify the
position to move to, the speed with which to move, that is, the size of the step, and whether
the motion should avoid solid instances or any instance.
More main actions
Some additional main actions are available in advanced mode. The following actions are
added:
Set Time Line
(Only available in advanced mode.) With this action you set the particular time line for an
instance of an object. You indicate the time line and the starting position within the time line
(0 is the beginning). You can also use this action to end a time line by choosing No Time Line
as value.
Time Line Position
(Only available in advanced mode.) With this action you can change the position in the current
time line (either absolute or relative). This can be used to skip certain parts of the time line or
to repeat certain parts. For example, if you want to make a looping time line, at the last
moment, add this action to set the position back to 0. You can also use it to wait for
something to happen. Just add the test action and, if not true, set the time line position
relative to -1.
Show Video
With this action you can show a video/movie file. You specify the file name and whether it
should be shown full screen or in the game window. Make sure the video file exists. You
should either distribute it with the game or include it in the game through the Global Game
Settings. This action is only available in the Pro Edition.
Replace Sprite
This action can be used to replace a sprite from the contents of a file. You indicate the sprite
you want to replace, the filename and the number of subimages in the sprite. Many different