public void OnBeginDrag(PointerEventData eventData)
{
/*1.OnBeginDrag converts the touch position to a local Vector2 using the
* RectTransformUtility.ScreenPointToLocalPointInRectangle method.
* 2.If the magnitude of the calculated vector is less than the radius variable, then the
* vector is reset so that it’s between a value of 0 and 1.isHeld is set true, then this
* statement updates the d-pad sprite and invokes the OnValueChange event.*/
if (!IsActive())
{
return;
}
RectTransform thisRect = transform as RectTransform;
Vector2 touchDir;
bool didConvert =
RectTransformUtility.ScreenPointToLocalPointInRectangle(thisRect, eventData.position,
eventData.enterEventCamera, out touchDir);
if (touchDir.sqrMagnitude > radius * radius)
{
touchDir.Normalize();
isHeld = true;
ActionPadDirection currentDirection = UpdateTouchSprite(touchDir);
OnValueChange.Invoke(currentDirection);
}
}
private ActionPadDirection UpdateTouchSprite(Vector2 direction)
{
//1
float angle = Mathf.Atan2(direction.x, direction.y) *
Mathf.Rad2Deg;
//2
if (angle < 0)
{
angle += 360;
}
//3
ActionPadDirection currentPadDirection =
ActionPadDirection.None;
if (angle <= 22.5f || angle > 337.5f)
{
currentPadDirection = ActionPadDirection.Up;
}
else if (angle > 22.5 && angle <= 67.5)
{
currentPadDirection = ActionPadDirection.UpRight;
}
else if (angle > 67.5 && angle <= 112.5)
{
currentPadDirection = ActionPadDirection.Right;
}
else if (angle > 112.5 && angle <= 157.5)
{
currentPadDirection = ActionPadDirection.DownRight;
}
else if (angle > 157.5 && angle <= 202.5)
{
currentPadDirection = ActionPadDirection.Down;
}
else if (angle > 202.5 && angle <= 247.5)
{
currentPadDirection = ActionPadDirection.DownLeft;
}
else if (angle > 247.5 && angle <= 292.5)
{
currentPadDirection = ActionPadDirection.Left;
}
else if (angle > 292.5 && angle <= 337.5)
{
currentPadDirection = ActionPadDirection.UpLeft;
}
int index = 0;
if (currentPadDirection != ActionPadDirection.None)
{
index = (int)currentPadDirection;
}
GetComponent <Image>().sprite = directionalSprites[index];
return(currentPadDirection);
}
public void OnDrag(PointerEventData eventData)
{
if (isHeld)
{
RectTransform thisRect = transform as RectTransform;
Vector2 touchDir;
RectTransformUtility.ScreenPointToLocalPointInRectangle(thisRect, eventData.position, eventData.enterEventCamera, out touchDir);
ActionPadDirection currentDirection = UpdateTouchSprite(touchDir);
OnValueChange.Invoke(currentDirection);
}
}
public void OnDrag(PointerEventData eventData)
{
/*OnDrag handles drag actions that go across the screen. It checks if the isHeld
* variable is set to true, and if it is, processes the touch like in the OnBeginDrag
* method.*/
if (isHeld)
{
RectTransform thisRect = transform as RectTransform;
Vector2 touchDir;
RectTransformUtility.ScreenPointToLocalPointInRectangle
(thisRect, eventData.position, eventData.enterEventCamera, out touchDir);
touchDir.Normalize();
ActionPadDirection currentDirection = UpdateTouchSprite(touchDir);
OnValueChange.Invoke(currentDirection);
}
}
public void OnPointerDown(PointerEventData eventData)
{
//for tapping rather than dragging
/*OnPointerDown converts the touch position to the local position on the ActionDPad
* RectTransform. It then updates the d-pad sprite using UpdateTouchSprite, and then invokes the
* OnValueChange event method with the calculated ActionPadDirection.*/
RectTransform thisRect = transform as RectTransform;
Vector2 touchDir;
RectTransformUtility.ScreenPointToLocalPointInRectangle(thisRect, eventData.position, eventData.enterEventCamera, out touchDir);
touchDir.Normalize();
ActionPadDirection currentDirection = UpdateTouchSprite(touchDir);
OnValueChange.Invoke(currentDirection);
}
public void OnBeginDrag(PointerEventData eventData)
{
if (!IsActive())
{
return;
}
RectTransform thisRect = transform as RectTransform;
Vector2 touchDir;
bool didConvert = RectTransformUtility.ScreenPointToLocalPointInRectangle(thisRect, eventData.position, eventData.enterEventCamera, out touchDir);
if (touchDir.sqrMagnitude > radius * radius)
{
touchDir.Normalize();
isHeld = true;
ActionPadDirection currentDirection = UpdateTouchSprite(touchDir);
OnValueChange.Invoke(currentDirection);
}
}
private ActionPadDirection UpdateTouchSprite(Vector2 direction)
{
/*
* 1.Calculates the angle of the direction vector and converts it to degrees using the
* built -in Mathf.Atan method.
* 2.Normalizes the angle to a value between 0 and 360 by adding 360 when the angle is
* less than zero.
* 3.Converts angle to an ActionPadDirection after checking if the angle is between a
* certain range of values. See the diagram below for the values.
* 4.Updates the Image using the directionalSprites array and returns
* currentPadDirection.*/
float angle = Mathf.Atan2(direction.x, direction.y) * Mathf.Rad2Deg;
if (angle < 0)
{
angle += 360;
}
ActionPadDirection currentPadDirection = ActionPadDirection.None;
if (angle <= 22.5f || angle > 337.5f)
{
currentPadDirection = ActionPadDirection.Up;
}
else if (angle > 22.5 && angle <= 67.5)
{
currentPadDirection = ActionPadDirection.UpRight;
}
else if (angle > 67.5 && angle <= 112.5)
{
currentPadDirection = ActionPadDirection.Right;
}
else if (angle > 112.5 && angle <= 157.5)
{
currentPadDirection = ActionPadDirection.DownRight;
}
else if (angle > 157.5 && angle <= 202.5)
{
currentPadDirection = ActionPadDirection.Down;
}
else if (angle > 202.5 && angle <= 247.5)
{
currentPadDirection = ActionPadDirection.DownLeft;
}
else if (angle > 247.5 && angle <= 292.5)
{
currentPadDirection = ActionPadDirection.Left;
}
else if (angle > 292.5 && angle <= 337.5)
{
currentPadDirection = ActionPadDirection.UpLeft;
}
int index = 0;
if (currentPadDirection != ActionPadDirection.None)
{
index = (int)currentPadDirection;
}
GetComponent <Image>().sprite = directionalSprites[index];
return(currentPadDirection);
}
