Implements proper deadzones for joystick or gamepad sticks for Unity

JoystickDeadZone.cs

using UnityEngine;

namespace datagreed.input
{
    /// <summary>
    /// Implements proper deadzones for joystick or gamepad sticks.
    /// Based on http://www.third-helix.com/2013/04/12/doing-thumbstick-dead-zones-right.html
    ///
    /// Example usage:
    ///
    /// Vector2 movementInput = JoystickDeadZone.InputWithRadialDeadZone(
    /// Input.GetAxis("Horizontal"),
    /// Input.GetAxis("Vertical")
    /// );
    ///
    /// </summary>
    public class JoystickDeadZone
    {
        public const float defaultDeadzone = 0.25f;
        
        /// <summary>
        /// Returns joystick input with proper radial deadzone.
        /// </summary>
        /// <param name="horizontalInput"></param>
        /// <param name="verticalInput"></param>
        /// <param name="deadzone"></param>
        /// <returns></returns>
        public static Vector2 InputWithRadialDeadZone(float horizontalInput, float verticalInput, float deadzone=defaultDeadzone)
        {
            Vector2 joystickInput = new Vector2(horizontalInput, verticalInput);
            
            if(joystickInput.magnitude < deadzone) joystickInput = Vector2.zero;

            return joystickInput;
        }
        
        /// <summary>
        /// Returns joystick input with scaled radial deadzone, that feels like accceleration.
        /// Good when high precision is needed
        /// </summary>
        /// <param name="horizontalInput"></param>
        /// <param name="verticalInput"></param>
        /// <param name="deadzone"></param>
        /// <returns></returns>
        public static Vector2 InputWithScaledRadialDeadZone(float horizontalInput, float verticalInput,
            float deadzone = defaultDeadzone)
        {
            Vector2 joystickInput = new Vector2(horizontalInput, verticalInput);
            if(joystickInput.magnitude < deadzone)
                joystickInput = Vector2.zero;
            else
                joystickInput = joystickInput.normalized * ((joystickInput.magnitude - deadzone) / (1 - deadzone));

            return joystickInput;
        }
    }
}