docs: public void onDrawCycle(Projection proj) {
  		if (mLastZoomLevel != proj.getZoomLevel()) {
  			proj.toPixels(sReferenceGeoPoint, mReferencePoint);
  			mLastZoomLevel = proj.getZoomLevel();
  		}
  		int x = mReferencePoint.x;
  		int y = mReferencePoint.y;
  		proj.toPixels(sReferenceGeoPoint, mReferencePoint);
  		int deltaX = mReferencePoint.x - x;
  		int deltaY = mReferencePoint.y - y;
  
  		offset(deltaX, deltaY);
  	}