private void onTouch(TouchEvent e)
{
var touches = e.getTouches(this, TouchPhase.MOVED);
if (touches.length == 1)
{
// one finger touching -> move
var delta = touches[0].getMovement(parent);
x += delta.x;
y += delta.y;
}
else if (touches.length == 2)
{
// two fingers touching -> rotate and scale
var touchA = touches[0];
var touchB = touches[1];
var currentPosA = touchA.getLocation(parent);
var previousPosA = touchA.getPreviousLocation(parent);
var currentPosB = touchB.getLocation(parent);
var previousPosB = touchB.getPreviousLocation(parent);
var currentVector = currentPosA.subtract(currentPosB);
var previousVector = previousPosA.subtract(previousPosB);
var currentAngle = Math.Atan2(currentVector.y, currentVector.x);
var previousAngle = Math.Atan2(previousVector.y, previousVector.x);
var deltaAngle = currentAngle - previousAngle;
// update pivot point based on previous center
var previousLocalA = touchA.getPreviousLocation(this);
var previousLocalB = touchB.getPreviousLocation(this);
pivotX = (previousLocalA.x + previousLocalB.x) * 0.5;
pivotY = (previousLocalA.y + previousLocalB.y) * 0.5;
// update location based on the current center
x = (currentPosA.x + currentPosB.x) * 0.5;
y = (currentPosA.y + currentPosB.y) * 0.5;
// rotate
rotation += deltaAngle;
// scale
var sizeDiff = currentVector.length / previousVector.length;
scaleX *= sizeDiff;
scaleY *= sizeDiff;
}
var touch = e.getTouch(this, TouchPhase.ENDED);
if (touch != null && touch.tapCount == 2)
{
parent.addChild(this); // bring self to front
}
// enable this code to see when you're hovering over the object
// touch = e.getTouch(this, TouchPhase.HOVER);
// alpha = touch ? 0.8 : 1.0;
}
