Infinite (local) Multiplayer In Godot?!
Okay to explain why someone would EVER want infinite players… I have six siblings and finding games that all of us can play is hard.
Also I have never been satisfied with multiplayer implementations in godot so I made my own!
Theory
The actions have a name and the input associated with them.
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Action name
- Input 1
- Input 2
The Basic idea is to create a reference InputEvent and copy and replace some data to a new InputEvent.
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Player_Left
- Left_Stick_Left, All Devices
Then you reference it and replace data.
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Player_Left_1
- Left_Stick_Left, Device 0
Now we just need to implement that.
Making Inputs
Add your new actions to input map through Project Settings > InputMap.
Just make sure to put at the start of each action name ‘player_’
Now when a player presses the join action you want to use InputMap.get_actions and loop through the result checking for ‘player_’
Store any results with the player_ tag in a array.
Copying the data
Unfortunately there isn’t a duplicate command…
So we just need to put the data in the right place.
Start by getting the player number.
- To get the ‘player_number’ just use the join buttons ‘device’ number.
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var players : Array
func _input(event):
if event is InputEventJoypadButton:
if event.button_index == JOY_SONY_X and !PlayerData.players.has(event.device):
players.append(event.device)
if event.button_index == JOY_SONY_CIRCLE and PlayerData.players.has(event.device):
players.remove(event.device)
if Input.is_action_just_pressed("start"):
make_actions()
Next Loop through your base action array and for each input do the following.
- Make a action_name variable and then replace the ‘player_’ in the ‘base_action’ with your ‘player_number’.
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var base_action_fields = str(player_number) + base_action.name.split("player")[0] - Get the ‘button_index’ from the ‘base_action’
(For keyboards the ‘button_index’ is called scancode.)
Then put the data where it goes.
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if base_action is InputEventJoypadButton:
InputMap.add_action(action_name)
var joypad_button = InputEventJoypadButton.new()
joypad_button.device = device
joypad_button.button_index = button_index
InputMap.action_add_event(action_name, jopad_button)
(you have to do the Joyaxis seperately)
That’s it! thanks for reading.
Some good resources is the documentation for InputEvent, and Pigdevs video on multiplayer.