internal Camera2D(float x, float y, float vieww, float viewh, float totalw, float totalh, Padding stpad = null, float maxz = 0.25f, float smoothfactor = 0.08f)
{
currentView = new RectangleF(x, y, vieww, viewh);
targetView = currentView.Clone();
stgxlim = totalw;
stgylim = totalh;
stagepadding = stpad != null ? stpad : new Padding(0, 0, 0, 0);
maxzoom = maxz;
smoothness = smoothfactor;
}