@Override
protected void onDrag(Touch t) {
camera.target = null;
if (pinching) {
float curSpan = PointF.distance(touch.current, another.current);
camera.zoom(
GameMath.gate(PixelScene.minZoom, startZoom * curSpan / startSpan, PixelScene.maxZoom));
} else {
if (!dragging && PointF.distance(t.current, t.start) > dragThreshold) {
dragging = true;
lastPos.set(t.current);
} else if (dragging) {
camera.scroll.offset(PointF.diff(lastPos, t.current).invScale(camera.zoom));
lastPos.set(t.current);
}
}
}
@Override
protected void onTouchDown(Touch t) {
if (t != touch && another == null) {
if (!touch.down) {
touch = t;
onTouchDown(t);
return;
}
pinching = true;
another = t;
startSpan = PointF.distance(touch.current, another.current);
startZoom = camera.zoom;
dragging = false;
}
}