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MPF includes a built-in attract mode which is what runs the machine when a game is not in progress. It starts when either the game_ended or reset_complete event is posted, and it stops when the game_start mode is posted. The attract mode runs at priority 10.
code and configuration for the built-in attract mode is in the
mpf/modes/attract folder. It’s automatically added to the list of
modes in the
modes: section of your machine-wide config based on
settings in the
mpfconfig.yaml baseline configuration file.
The attract mode is responsible for many things, including:
- Watching for the start button to be pressed & released to kick off the request_to_start_game event
- Recording how long the start button was held in for in order to take different actions based on different times. (For example, maybe pressing the start button normally starts a regular game, and doing a long-press lets the player login with a custom player profile.)
- Recording what other buttons were active when the start button is pressed. (Maybe holding the right flipper button and pushing start enables tournament mode.)
You can completely customize and extend the attract mode. In most cases that’s as simple as adding a config file for the attract mode to your game folder and then configuring light and display shows to play. See the tutorial for details on how to do this.