Tutorial 13: Add slingshots, pop bumpers, and other autofire devices
This is part of our Getting Started guide.
The guide starts here.
It's been awhile since this tutorial has been updated. If you find anything that is no longer relevant, please let us know, or better yet, edit or update it yourself!
While we're setting up the basic playfield devices, let's configure
the "autofire" devices like slingshots and pop bumpers. (An "autofire
device" is anything where you have one switch and one coil and the
switch being hit automatically causes the coil to fire.) This makes the
game more fun since it's kind of sad to see a ball hit a slingshot and
nothing happen. You add these autofire devices in the
section of your machine configuration. It's pretty simple. Just create
an entry for the name you'd like to give that device, and then add
sub-entries for the
coil: for that device. For example,
autofire_coils: configuration for Demolition Man, which
has two standard slingshots, and upper slingshot near the pop bumpers,
and two pop bumpers (which we happen to refer to as "jets" in this
#! switches: #! s_left_slingshot: #! number: 1 #! s_right_slingshot: #! number: 2 #! s_top_slingshot: #! number: 3 #! s_left_jet: #! number: 4 #! s_right_jet: #! number: 5 #! coils: #! c_left_slingshot: #! number: 0 #! c_right_slingshot: #! number: 1 #! c_top_slingshot: #! number: 2 #! c_left_jet_bumper: #! number: 3 #! c_right_jet_bumper: #! number: 4 autofire_coils: left_slingshot: coil: c_left_slingshot switch: s_left_slingshot right_slingshot: coil: c_right_slingshot switch: s_right_slingshot upper_slingshot: coil: c_top_slingshot switch: s_top_slingshot left_jet: coil: c_left_jet_bumper switch: s_left_jet right_jet: coil: c_right_jet_bumper switch: s_right_jet
Autofire devices in MPF are somewhat intelligent. They will only be activated while a ball is in play during a game, which means they automatically deactivate themselves during attract mode and if the player tilts. (You can override these default settings as well as configure additional MPF events that will cause them to activate or deactivate. See the autofire_coils: section of the configuration file reference for details, though you don't have to do that now.)
Remember if you want to adjust the strength of these coils, you can do
that in the coil's
default_pulse_ms: setting in the
of your config.
Check out the complete config.yaml file so far
If you want to see a complete
config.yaml file up to this point, it's
You can run this file directly by switching to that folder and then running the following command:
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