using System;  
 using System.Collections.Generic;  
 using System.Linq;  
 using System.Windows.Forms;  
 
 namespace SweepAngle  
 {  
     static class Program  
     {  
         /// <summary>  
         /// The main entry point for the application.  
         /// </summary>  
         [STAThread]  
         static void Main()  
         {  
             Application.EnableVisualStyles();  
             Application.SetCompatibleTextRenderingDefault(false);  
             Application.Run(new TestForm());  
         }  
     }  
 }  
 

 using System;  
 using System.Collections.ObjectModel;  
 using System.Drawing;  
 using System.Windows.Forms;  
 using ThinkGeo.MapSuite.Core;  
 
 namespace SweepAngle  
 {  
     public partial class TestForm : Form  
     {  
         private MapEngine mapEngine = new MapEngine();  
         private Bitmap bitmap = null;  
         float sweepAngle = 1;  
        Collection<PointShape> pointShapes = new Collection<PointShape>();  
 
        public TestForm()  
         {  
             InitializeComponent();  
         }  
 
         private void TestForm_Load(object sender, EventArgs e)  
         {  
             // Set the extent and the background color  
             mapEngine.CurrentExtent = ExtentHelper.GetDrawingExtent(new RectangleShape(-95.2834,38.9834,-95.2058,38.9401), Map.Width, Map.Height);  
             mapEngine.BackgroundFillBrush = new GeoSolidBrush(GeoColor.GeographicColors.ShallowOcean);  
 
             //Displays the World Map Kit as a background.  
             ThinkGeo.MapSuite.Core.WorldMapKitLayer worldMapKitLayer = new ThinkGeo.MapSuite.Core.WorldMapKitLayer();  
             //mapEngine.StaticLayers.Add(worldMapKitLayer);  
 
             //Displays the polygon for sweep angle.  
             InMemoryFeatureLayer inMemoryFeatureLayer = new InMemoryFeatureLayer();  
             inMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle = AreaStyles.CreateHueFamilyLinearGradientAreaStyle(GeoColor.StandardColors.Transparent, GeoColor.StandardColors.Yellow,  
                 5, GeoColor.StandardColors.Blue, GeoColor.StandardColors.Red, 45);  
             inMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultPointStyle = PointStyles.CreateSimplePointStyle(PointSymbolType.Circle, GeoColor.StandardColors.Yellow, 10);  
             inMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;  
 
             InMemoryFeatureLayer pointsInMemoryFeatureLayer = new InMemoryFeatureLayer();  
             pointsInMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultPointStyle = PointStyles.CreateSimplePointStyle(PointSymbolType.Circle, GeoColor.StandardColors.Yellow, 10);  
             pointsInMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;  
 
             //Collection of PointShapes to do the spatial query based on the sweep angle PolygonShape.  
             pointShapes.Add(new PointShape(-95.2297, 38.9704));  
             pointShapes.Add(new PointShape(-95.2452, 38.9696));  
             pointShapes.Add(new PointShape(-95.2597, 38.9676));  
             pointShapes.Add(new PointShape(-95.2565, 38.9581));  
             pointShapes.Add(new PointShape(-95.2455, 38.947));  
             pointShapes.Add(new PointShape(-95.2352, 38.9531));  
 
             mapEngine.DynamicLayers.Add("Sweep Angle", inMemoryFeatureLayer);  
             mapEngine.DynamicLayers.Add("Points", pointsInMemoryFeatureLayer);  
 
             timer1.Interval = 10;  
             timer1.Start();  
 
             DrawImage();  
         }  
 
         private void timer1_Tick(object sender, EventArgs e)  
         {  
             if (sweepAngle == 360) sweepAngle = 1;  
 
             //Updates the sweep angle polygon  
             InMemoryFeatureLayer inMemoryFeatureLayer = (InMemoryFeatureLayer)mapEngine.DynamicLayers["Sweep|Angle"];  
             inMemoryFeatureLayer.Open();  
             inMemoryFeatureLayer.EditTools.BeginTransaction();  
             inMemoryFeatureLayer.InternalFeatures.Clear();  
             PolygonShape polygonShape = CreatePie(new PointShape(-95.2462, 38.9609), 0F, sweepAngle, 0.0001F, 0.02F);  
             inMemoryFeatureLayer.EditTools.Add(new Feature(polygonShape));  
             inMemoryFeatureLayer.EditTools.CommitTransaction();  
             inMemoryFeatureLayer.Close();  
 
             //Updates the points based on spatial query.  
             InMemoryFeatureLayer pointsInMemoryFeatureLayer = (InMemoryFeatureLayer)mapEngine.DynamicLayers["Points"];  
             pointsInMemoryFeatureLayer.Open();  
             pointsInMemoryFeatureLayer.EditTools.BeginTransaction();  
             pointsInMemoryFeatureLayer.InternalFeatures.Clear();  
             foreach (PointShape pointShape in pointShapes)  
             {  
                 if (polygonShape.Contains(pointShape))  
                 {  
                     pointsInMemoryFeatureLayer.EditTools.Add(new Feature(pointShape));  
                 }  
             }  
             pointsInMemoryFeatureLayer.EditTools.CommitTransaction();  
             pointsInMemoryFeatureLayer.Close();  
 
             sweepAngle = sweepAngle + 1;  
 
             DrawImage();  
         }  
 
         //Creates the Pie based on a start angle and a sweep angle.  
         private PolygonShape CreatePie(PointShape origin, float startAngle, float sweepAngle, float innerRadius, float outerRadius)  
         {  
             double minAngle = Math.Min(startAngle, sweepAngle);  
             double maxAngle = Math.Max(startAngle, sweepAngle);  
 
             int quaterPointCount = 96;  
 
             RingShape innerCircle = new EllipseShape(origin, innerRadius).ToPolygon(quaterPointCount).OuterRing;  
             RingShape outerCircle = new EllipseShape(origin, outerRadius).ToPolygon(quaterPointCount).OuterRing;  
 
             int innerStartIndex = (int)(startAngle * quaterPointCount * 4 / 360.0);  
             int innerEndIndex = (int)(sweepAngle * quaterPointCount * 4 / 360.0);  
 
             int outerStartIndex = innerStartIndex;  
             int outerEndIndex = innerEndIndex;  
 
             Collection<Vertex> vertices = new Collection<Vertex>();  
 
             for (int i = outerEndIndex; i >= outerStartIndex; i--)  
             {  
                 vertices.Add(outerCircle.Vertices[i]);  
             }  
 
             for (int i = innerStartIndex; i <= innerEndIndex; i++)  
             {  
                 vertices.Add(innerCircle.Vertices[i]);  
             }  
 
             vertices.Add(outerCircle.Vertices[outerEndIndex]);  
 
             RingShape resultRing = new RingShape(vertices);  
             PolygonShape resultPolygon = new PolygonShape(resultRing);  
 
             return resultPolygon;  
         }  
 
 
         private void DrawImage()  
         {  
             if (bitmap != null) { bitmap.Dispose(); }  
             bitmap = new Bitmap(Map.Width, Map.Height);  
             mapEngine.OpenAllLayers();  
             mapEngine.DrawStaticLayers(bitmap, GeographyUnit.DecimalDegree);  
             mapEngine.DrawDynamicLayers(bitmap, GeographyUnit.DecimalDegree);  
             mapEngine.CloseAllLayers();  
 
             Map.Image = bitmap;  
         }  
 
        private void ToolBar_ButtonClick(object sender, ToolBarButtonClickEventArgs e)  
         {  
             switch (e.Button.Tag.ToString())  
             {  
                 case "Zoom In":  
                     mapEngine.CurrentExtent.ScaleDown(50);  
                     break;  
                 case "Zoom Out":  
                     mapEngine.CurrentExtent.ScaleUp(50);  
                     break;  
                 case "Full Extent":  
                     mapEngine.CurrentExtent = ExtentHelper.GetDrawingExtent(new RectangleShape(-180.0, 83.0, 180.0, -90.0), Map.Width, Map.Height);  
                     break;  
                 case "Pan Left":  
                     mapEngine.CurrentExtent = ExtentHelper.Pan(mapEngine.CurrentExtent, PanDirection.Left, 20);  
                     break;  
                 case "Pan Right":  
                     mapEngine.CurrentExtent = ExtentHelper.Pan(mapEngine.CurrentExtent, PanDirection.Right, 20);  
                     break;  
                 case "Pan Up":  
                     mapEngine.CurrentExtent = ExtentHelper.Pan(mapEngine.CurrentExtent, PanDirection.Up, 20);  
                     break;  
                 case "Pan Down":  
                     mapEngine.CurrentExtent = ExtentHelper.Pan(mapEngine.CurrentExtent, PanDirection.Down, 20);  
                     break;  
                 default:  
                     break;  
             }  
             DrawImage();  
         }  
 
         private void btnClose_Click(object sender, EventArgs e)  
         {  
             this.Close();  
         }  
 
         private void Map_MouseMove(object sender, MouseEventArgs e)  
         {  
             //Displays the X and Y in screen coordinates.  
             statusStrip1.Items["toolStripStatusLabelScreen"].Text = "X:" + e.X + " Y:" + e.Y;  
 
             //Gets the PointShape in world coordinates from screen coordinates.  
             PointShape pointShape = ExtentHelper.ToWorldCoordinate(mapEngine.CurrentExtent, new ScreenPointF(e.X, e.Y), Map.Width, Map.Height);  
 
             //Displays world coordinates.  
             statusStrip1.Items["toolStripStatusLabelWorld"].Text = "(world) X:" + Math.Round(pointShape.X, 4) + " Y:" + Math.Round(pointShape.Y, 4);  
         }  
 
 
     }  
 }