//int最大值32765的一半16382.5,最大支持16383 private void SetClip(FeatureElement fe, Rectangle2D clipBox) { Rectangle2D bounds = fe.Geometry.Bounds; if ((Rectangle2D.IsNullOrEmpty(bounds)) || ((bounds.Width / this.Resolution) < 16383.5)) { if (fe.ClippedGeometry != null) { fe.ClearClip(); } } else if (((Rectangle2D.IsNullOrEmpty(fe.ClipBox)) || !clipBox.Within(fe.ClipBox)) || ((fe.ClipBox.Width / this.Resolution) >= 16383.5)) { if (fe.Geometry is GeoRegion) { fe.SetClip(new GeoRegionClip(clipBox).Clip(fe.Geometry as GeoRegion), clipBox); } else if (fe.Geometry is GeoLine) { fe.SetClip(new GeoLineClip(clipBox).Clip(fe.Geometry as GeoLine), clipBox); } } }