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joykey and vjoy by Ponywolf

Demo

These two modules can be strung together to make an on screen joystick control that outputs key events, thereby reducing some of the complexity of writing game interface code. Read more about Corona SDK key events here... https://docs.coronalabs.com/api/event/key/index.html

joykey.lua

Converts joystick axis events into key events in Corona SDK

Usage:

Just add this line to your main.lua

require("com.ponywolf.joykey").start()

This module turns gamepad axis events into keyboard events so we don't have to write separate code for joystick and keyboard control. Axis 1 & 2 will return up/down/left/right keyboard events and Axis 3 & 4 will return w/a/s/d keyboard events.

vjoy.lua

A modern on-screen joystick and button class that emulate gamepad axis and key events. Basically, if you have a game that works with gamepad input these on screen controls can be customized to make it work with on-screen controls

Usage:

Require the module in your main.lua

local vjoy = require "com.ponywolf.vjoy"

Add a virtual joystick

vjoy.newStick(startAxis, innerRadius, outerRadius)
StartAxis

The first axis of the two for your joystick (defaults to 1)

innerRadius

Size of the joystick control (defaults to 48px) or a filename of an image to load for the joystick forground

outerRadius

Size of the joystick movement area (defaults to 496px) or a filename of an image to load for the joystick background

Add a virtual button

vjoy.newButton(key, radius)
key

The keyName of the button you want to fire (defaults to "buttonA")

radius

Size of the button control (defaults to 64px) or a filename of an image to load for the button