private static void CalculateAveragePolylabelCellSize(AIXMBasicMessage msg, out double averageCellSize) { // Calculate the average polylabel cell size to "guestimate" what the font scaling value should be double aggregatedCellSize = 0; int totalTests = 0; foreach (var member in msg.hasMember) { var polygonTest = new List <MyPoint>(); var coords = member.Airspace.timeSlice.AirspaceTimeSlice1.geometryComponent.AirspaceGeometryComponent .theAirspaceVolume.AirspaceVolume.horizontalProjection.Surface.patches.PolygonPatch.exterior .LinearRing.posList.Split(' '); ReverseArray(coords); var interiorCoords = new List <string>(); if (member.Airspace.timeSlice.AirspaceTimeSlice1.geometryComponent .AirspaceGeometryComponent.theAirspaceVolume.AirspaceVolume.horizontalProjection.Surface.patches .PolygonPatch.interior != null) { foreach (var tmp in member.Airspace.timeSlice.AirspaceTimeSlice1.geometryComponent .AirspaceGeometryComponent.theAirspaceVolume.AirspaceVolume.horizontalProjection.Surface.patches .PolygonPatch.interior.Select(interior => interior.LinearRing.posList.Split(' '))) { ReverseArray(tmp); interiorCoords.AddRange(tmp); } } var combined = new List <LatLng>(); if (interiorCoords.Count > 0) { // If the polygons are overlapping, then we need to do some extra // magic to ensure the mva label is placed in the correct polygon. // To do this, we combine the exterior and interior coordinate groups // which will be used to calculate the polylabel bounding box. var combinedCoords = coords.Concat(interiorCoords).ToArray(); for (var i = 0; i < combinedCoords.Length; i += 2) { combined.Add(new LatLng(double.Parse(combinedCoords[i]), double.Parse(combinedCoords[i + 1]))); } for (var i = 0; i < combined.Count; i++) { var x1 = i == 0 ? (combined[i].Lat) : (combined[i - 1].Lat); var y1 = i == 0 ? (combined[i].Lon) : (combined[i - 1].Lon); var geo = GeoUtils.GeoToPixels(x1, y1, mCenterLat, mCenterLon); polygonTest.Add(new MyPoint(geo.X, geo.Y)); } } var temp = new List <LatLng>(); for (var i = 0; i < coords.Length; i += 2) { temp.Add(new LatLng(double.Parse(coords[i]), double.Parse(coords[i + 1]))); } for (var i = 0; i < temp.Count; i++) { var x1 = i == 0 ? (temp[i].Lat) : (temp[i - 1].Lat); var y1 = i == 0 ? (temp[i].Lon) : (temp[i - 1].Lon); if (interiorCoords.Count == 0) { var geo = GeoUtils.GeoToPixels(x1, y1, mCenterLat, mCenterLon); polygonTest.Add(new MyPoint(geo.X, geo.Y)); } } var poly = PolyLabel.GetPolyLabel(polygonTest); aggregatedCellSize += poly.Radius / 100; totalTests++; } averageCellSize = aggregatedCellSize / totalTests; }
private static void CreateMvaTextLabels(StringBuilder sb, double averageCellSize, string mvaLabel, List <MyPoint> polygonPoints) { if (string.IsNullOrEmpty(mvaLabel)) { return; } var scale = Math.Min(Math.Max(0.03f, averageCellSize), 0.5f); var polyLabel = PolyLabel.GetPolyLabel(polygonPoints); var x = polyLabel.Centroid.X - (mvaLabel.Length - 1) * 20 * scale; var y = polyLabel.Centroid.Y; foreach (var digit in mvaLabel.ToCharArray()) { switch (digit) { case '0': GetCharacterLines(HersheyFont.Zero, x, y, scale, sb); break; case '1': GetCharacterLines(HersheyFont.One, x, y, scale, sb); break; case '2': GetCharacterLines(HersheyFont.Two, x, y, scale, sb); break; case '3': GetCharacterLines(HersheyFont.Three, x, y, scale, sb); break; case '4': GetCharacterLines(HersheyFont.Four, x, y, scale, sb); break; case '5': GetCharacterLines(HersheyFont.Five, x, y, scale, sb); break; case '6': GetCharacterLines(HersheyFont.Six, x, y, scale, sb); break; case '7': GetCharacterLines(HersheyFont.Seven, x, y, scale, sb); break; case '8': GetCharacterLines(HersheyFont.Eight, x, y, scale, sb); break; case '9': GetCharacterLines(HersheyFont.Nine, x, y, scale, sb); break; } x += (20 * scale); } }