/// <summary>
/// Function for joystick tweaking (moving with the finger)
/// The values of the Axis are also calculated here
/// </summary>
/// <param name="touchPosition">Current touch position in screen cooridnates (pixels)
/// It's recalculated in units so it's resolution-independent</param>
protected override void TweakControl(Vector2 touchPosition)
{
// First, let's find our current touch position in world space
Vector3 worldTouchPosition = ParentCamera.ScreenToWorldPoint(touchPosition);
// Now we need to find a directional vector from the center of the joystick
// to the touch position
Vector3 differenceVector = (worldTouchPosition - _baseTransform.position);
// If we're out of the drag range
if (differenceVector.sqrMagnitude >
DragRadius * DragRadius)
{
// Normalize this directional vector
differenceVector.Normalize();
// And place the stick to it's extremum position
_stickTransform.position = _baseTransform.position +
differenceVector * DragRadius;
}
else
{
// If we're inside the drag range, just place it under the finger
_stickTransform.position = worldTouchPosition;
}
// Store calculated axis values to our private variable
CurrentAxisValues = differenceVector;
// We also fire our event if there are subscribers
OnControllerMoved(differenceVector);
}
/// <summary>
/// Snap the joystick under the finger if it's expected
/// </summary>
/// <param name="touch">Current touch position in screen pixels
/// It converts pixels to world space coordinates so it's resolution independent</param>
protected virtual void PlaceJoystickBaseUnderTheFinger(Touch touch)
{
if (!_snapsToFinger)
{
return;
}
_stickTransform.position =
_baseTransform.position = ParentCamera.ScreenToWorldPoint(touch.position);
}
/// <summary>
/// Automatically called by TweakIfNeeded
/// </summary>
/// <param name="touchPosition">Touch position in screen pixels</param>
protected override void TweakControl(Vector2 touchPosition)
{
Vector3 worldPosition = ParentCamera.ScreenToWorldPoint(touchPosition);
Vector3 difference = worldPosition - PreviousPosition;
if (IsAlwaysNormalized)
{
difference.Normalize();
}
CurrentAxisValues = difference;
OnControllerMoved(difference);
PreviousPosition = worldPosition;
}
/// <summary>
/// Good old Update method where all the magic happens
/// </summary>
protected virtual void Update()
{
// If we tweaked, we return and don't check for other touches
if (TweakIfNeeded())
{
return;
}
// If we didn't tweak, we try to capture any touch
Touch currentTouch;
if (!IsTouchCaptured(out currentTouch))
{
return;
}
// Setting our initial "previous" position
PreviousPosition = ParentCamera.ScreenToWorldPoint(currentTouch.position);
}
/// <summary>
/// Utility method, chechks whether the touch is inside the touch zone (green rect)
/// </summary>
/// <param name="touchPosition">Current touch position in screen pixels
/// It converts these pixels to units, so it's totally resolution-independent
/// </param>
/// <returns>Whether it's inside of the touch zone</returns>
private bool IsTouchInZone(Vector2 touchPosition)
{
return(CalculatedTouchZone.Contains(ParentCamera.ScreenToWorldPoint(touchPosition), false));
}
protected override void MoreUpdateLogic(Touch capturedTouch)
{
PreviousPosition = ParentCamera.ScreenToWorldPoint(capturedTouch.position);
}