private void changeZoomPosition(float dz, float angle) {
final QuadPoint cp = initialViewport.getCenterPixelPoint();
float dx = cp.x - initialMultiTouchCenterPoint.x;
float dy = cp.y - initialMultiTouchCenterPoint.y;
final RotatedTileBox calc = initialViewport.copy();
calc.setLatLonCenter(initialCenterLatLon.getLatitude(), initialCenterLatLon.getLongitude());
float calcZoom = initialViewport.getZoom() + dz + initialViewport.getZoomScale();
float calcRotate = calc.getRotate() + angle;
calc.setRotate(calcRotate);
calc.setZoomAnimation(dz);
final LatLon r = calc.getLatLonFromPixel(cp.x + dx, cp.y + dy);
setLatLon(r.getLatitude(), r.getLongitude());
zoomToAnimate(calcZoom, true);
rotateToAnimate(calcRotate);
}
public float getZoomScale() {
return currentViewport.getZoomScale();
}