protected override void OnRenderInternal(SharpMap.MapViewport map, GeoAPI.Geometries.IPolygon polygon, System.Drawing.Graphics g) { var pt = polygon.Centroid; g.RenderingOrigin = System.Drawing.Point.Truncate(map.WorldToImage(pt.Coordinate)); base.OnRenderInternal(map, polygon, g); }
/// <summary> /// Method to render the arrow /// </summary> /// <param name="map">The map</param> /// <param name="graphics">The graphics object</param> /// <param name="arrow">The arrow</param> private void RenderArrow(SharpMap.MapViewport map, System.Drawing.Graphics graphics, GeoAPI.Geometries.ILineString arrow) { var pts = new System.Drawing.PointF[arrow.Coordinates.Length]; for (var i = 0; i < pts.Length; i++) { pts[i] = map.WorldToImage(arrow.GetCoordinateN(i)); } graphics.DrawLines(ArrowPen, pts); }