public class StreetDirectionSymbolizer : SharpMap.Rendering.Symbolizer.BaseSymbolizer,

SharpMap.Rendering.Symbolizer.ILineSymbolizer

/// <summary>

/// Creates an instance of this class

/// </summary>

public StreetDirectionSymbolizer()

{

RepeatInterval = 500;

ArrowLength = 100;

ArrowPen = new System.Drawing.Pen(System.Drawing.Color.Black, 2)

{

EndCap = System.Drawing.Drawing2D.LineCap.ArrowAnchor

};

}

/// <summary>

/// Method to place the street direction symbols

/// </summary>

/// <param name="map"></param>

/// <param name="lineString"></param>

/// <param name="graphics"></param>

private void OnRenderInternal(SharpMap.MapViewport map, GeoAPI.Geometries.ILineString lineString,

System.Drawing.Graphics graphics)

{

var length = lineString.Length;

var lil = new NetTopologySuite.LinearReferencing.LengthIndexedLine(lineString);

if (length < RepeatInterval + ArrowLength)

{

var start = System.Math.Max(0, (length - ArrowLength)/2);

var end = System.Math.Min(length, (length + ArrowLength)/2);

var arrow = (GeoAPI.Geometries.ILineString) lil.ExtractLine(start, end);

RenderArrow(map, graphics, arrow);

return;

}

var numArrows = (int) ((lineString.Length - ArrowLength)/RepeatInterval);

var offset = (lineString.Length - numArrows*RepeatInterval - ArrowLength)*0.5;

while (offset + ArrowLength < lineString.Length)

{

var arrow = (GeoAPI.Geometries.ILineString) lil.ExtractLine(offset, offset + ArrowLength);

RenderArrow(map, graphics, arrow);

offset += RepeatInterval;

}

}

/// <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);

}

/// <summary>

/// Gets or sets a value indicating at which distances a street direction marker should be drawn.

/// </summary>

public double RepeatInterval { get; set; }

/// <summary>

/// Gets or sets a value indicating the length of the street direction arrow.

/// </summary>

public double ArrowLength { get; set; }

/// <summary>

/// Gets or sets a value indicating the pen to use when drawing the marker

/// </summary>

public System.Drawing.Pen ArrowPen { get; set; }

public override void Begin(System.Drawing.Graphics g, SharpMap.MapViewport map, int aproximateNumberOfGeometries)

{

base.Begin(g, map, aproximateNumberOfGeometries);

//Adjust Arrow cap

var size = (float) (ArrowLength/5/map.PixelWidth);

ArrowPen.CustomEndCap = new System.Drawing.Drawing2D.AdjustableArrowCap(size, size);

}

public void Render(SharpMap.MapViewport map, GeoAPI.Geometries.ILineal geometry, System.Drawing.Graphics graphics)

{

if (geometry is GeoAPI.Geometries.IMultiLineString)

{

var mls = (GeoAPI.Geometries.IMultiLineString) geometry;

for (var i = 0; i < mls.Count; i++)

{

OnRenderInternal(map, (GeoAPI.Geometries.ILineString) mls.GetGeometryN(i), graphics);

}

return;

}

OnRenderInternal(map, (GeoAPI.Geometries.ILineString) geometry, graphics);

}

protected override void ReleaseManagedResources()

{

base.ReleaseManagedResources();

ArrowPen.Dispose();

}

public override object Clone()

{

var res = (StreetDirectionSymbolizer) MemberwiseClone();

res.ArrowPen = new System.Drawing.Pen(((System.Drawing.SolidBrush) ArrowPen.Brush).Color, ArrowPen.Width);

return res;

}

public class LineSymbolizerTest

{

[NUnit.Framework.OneTimeSetUp]

public void OneTimeSetUp()

{

GeoAPI.GeometryServiceProvider.Instance = NetTopologySuite.NtsGeometryServices.Instance;

}

[NUnit.Framework.Test]

public void TestBasicLineSymbolizer()

{

if (!System.IO.File.Exists("d:\\daten\\GeoFabrik\\roads.shp"))

throw new NUnit.Framework.IgnoreException("");

var p = new SharpMap.Data.Providers.ShapeFile(@"d:\\daten\\GeoFabrik\\roads.shp", false);

var l = new SharpMap.Layers.VectorLayer("roads", p);

//l.Style.Outline = new System.Drawing.Pen(System.Drawing.Color.Firebrick, 5);

l.Style.Line = new System.Drawing.Pen(System.Drawing.Color.Gold, 1);

l.Style.EnableOutline = false;

var m = new SharpMap.Map(new System.Drawing.Size(1440,1080)) {BackColor = System.Drawing.Color.Cornsilk};

m.Layers.Add(l);

m.ZoomToExtents();

var sw = new System.Diagnostics.Stopwatch();

sw.Start();

m.GetMap();

sw.Stop();

System.Console.WriteLine(string.Format("Rendering old method: {0}ms", sw.ElapsedMilliseconds));

sw.Reset();

sw.Start();

var bmp = m.GetMap();

sw.Stop();

System.Console.WriteLine(string.Format("Rendering old method: {0}ms", sw.ElapsedMilliseconds));

bmp.Save("NDSRoads1.bmp");

var cls = new SharpMap.Rendering.Symbolizer.CachedLineSymbolizer();

//cls.LineSymbolizeHandlers.Add(new SharpMap.Rendering.Symbolizer.PlainLineSymbolizeHandler { Line = new System.Drawing.Pen(System.Drawing.Color.Firebrick, 5) });

cls.LineSymbolizeHandlers.Add(new SharpMap.Rendering.Symbolizer.PlainLineSymbolizeHandler { Line = new System.Drawing.Pen(System.Drawing.Color.Gold, 1) });

l.Style.LineSymbolizer = cls;

sw.Reset(); sw.Start();

bmp = m.GetMap();

sw.Stop();

System.Console.WriteLine(string.Format("Rendering new method: {0}ms", sw.ElapsedMilliseconds));

bmp.Save("NDSRoads2.bmp");

}

[NUnit.Framework.Test]

public void TestStreetDirectionSymbolizer()

{

if (!System.IO.File.Exists("d:\\daten\\GeoFabrik\\Aurich\\roads.shp"))

throw new NUnit.Framework.IgnoreException("");

var p = new SharpMap.Data.Providers.ShapeFile(@"d:\\daten\\GeoFabrik\\Aurich\\roads.shp", false);

var l = new SharpMap.Layers.VectorLayer("roads", p);

l.Style.Outline = new System.Drawing.Pen(System.Drawing.Color.Firebrick, 7);

l.Style.Line = new System.Drawing.Pen(System.Drawing.Color.Gold, 3);

l.Style.EnableOutline = true;

var sd = new SharpMap.Layers.Symbolizer.LinealVectorLayer("streetd", p, new StreetDirectionSymbolizer()

{

ArrowLength = 100, RepeatInterval = 500

});

var m = new SharpMap.Map(new System.Drawing.Size(1440, 1080)) { BackColor = System.Drawing.Color.Cornsilk };

m.Layers.Add(l);

m.Layers.Add(sd);

m.ZoomToExtents();

m.Zoom *= 0.3;

var sw = new System.Diagnostics.Stopwatch();

sw.Start();

var bmp = m.GetMap();

sw.Stop();

System.Console.WriteLine(string.Format("Rendering new method: {0}ms", sw.ElapsedMilliseconds));

bmp.Save("NDSRoadsSD.bmp");

}

[NUnit.Framework.Test]

public void TestWarpedLineSymbolizer()

{

if (!System.IO.File.Exists("d:\\daten\\GeoFabrik\\Aurich\\roads.shp"))

throw new NUnit.Framework.IgnoreException("");

var p = new SharpMap.Data.Providers.ShapeFile(@"d:\\daten\\GeoFabrik\\Aurich\\roads.shp", false);

var l = new SharpMap.Layers.VectorLayer("roads", p);

var cls = new SharpMap.Rendering.Symbolizer.CachedLineSymbolizer();

cls.LineSymbolizeHandlers.Add(new SharpMap.Rendering.Symbolizer.PlainLineSymbolizeHandler

{Line = new System.Drawing.Pen(System.Drawing.Color.Gold, 2)});

var wls = new SharpMap.Rendering.Symbolizer.WarpedLineSymbolizeHander

{

Pattern =

SharpMap.Rendering.Symbolizer.WarpedLineSymbolizer.

GetGreaterSeries(3, 3),

Line = new System.Drawing.Pen(System.Drawing.Color.Firebrick, 1)

, Interval = 20

};

cls.LineSymbolizeHandlers.Add(wls);

l.Style.LineSymbolizer = cls;

var m = new SharpMap.Map(new System.Drawing.Size(720, 540)) {BackColor = System.Drawing.Color.Cornsilk};

m.Layers.Add(l);

m.ZoomToExtents();

var sw = new System.Diagnostics.Stopwatch();

sw.Start();

var bmp = m.GetMap();

sw.Stop();

System.Console.WriteLine(string.Format("Rendering new method: {0}ms", sw.ElapsedMilliseconds));

bmp.Save("AurichRoads1.bmp");

cls.LineSymbolizeHandlers[1] = new SharpMap.Rendering.Symbolizer.WarpedLineSymbolizeHander

{

Pattern =

SharpMap.Rendering.Symbolizer.WarpedLineSymbolizer.

GetTriangle(4, 0),

Line = new System.Drawing.Pen(System.Drawing.Color.Firebrick, 1),

Fill = new System.Drawing.SolidBrush(System.Drawing.Color.Firebrick)

,Interval = 10

};

sw.Reset(); sw.Start();

bmp = m.GetMap();

sw.Stop();

System.Console.WriteLine(string.Format("Rendering new method: {0}ms", sw.ElapsedMilliseconds));

bmp.Save("AurichRoads2-0.bmp");

cls.LineSymbolizeHandlers[1] = new SharpMap.Rendering.Symbolizer.WarpedLineSymbolizeHander

{

Pattern =

SharpMap.Rendering.Symbolizer.WarpedLineSymbolizer.

GetTriangle(4, 1),

Line = new System.Drawing.Pen(System.Drawing.Color.Firebrick, 1),

Fill = new System.Drawing.SolidBrush(System.Drawing.Color.Firebrick)

,

Interval = 10

};

sw.Reset(); sw.Start();

bmp = m.GetMap();

sw.Stop();

System.Console.WriteLine(string.Format("Rendering new method: {0}ms", sw.ElapsedMilliseconds));

bmp.Save("AurichRoads2-1.bmp");

cls.LineSymbolizeHandlers[1] = new SharpMap.Rendering.Symbolizer.WarpedLineSymbolizeHander

{

Pattern =

SharpMap.Rendering.Symbolizer.WarpedLineSymbolizer.

GetTriangle(4, 2),

Line = new System.Drawing.Pen(System.Drawing.Color.Firebrick, 1),

Fill = new System.Drawing.SolidBrush(System.Drawing.Color.Firebrick)

,

Interval = 10

};

sw.Reset(); sw.Start();

bmp = m.GetMap();

sw.Stop();

System.Console.WriteLine(string.Format("Rendering new method: {0}ms", sw.ElapsedMilliseconds));

bmp.Save("AurichRoads2-2.bmp");

cls.LineSymbolizeHandlers[1] = new SharpMap.Rendering.Symbolizer.WarpedLineSymbolizeHander

{

Pattern =

SharpMap.Rendering.Symbolizer.WarpedLineSymbolizer.

GetTriangle(4, 3),

Line = new System.Drawing.Pen(System.Drawing.Color.Firebrick, 1),

Fill = new System.Drawing.SolidBrush(System.Drawing.Color.Firebrick)

,

Interval = 10

};

sw.Reset(); sw.Start();

bmp = m.GetMap();

sw.Stop();

System.Console.WriteLine(string.Format("Rendering new method: {0}ms", sw.ElapsedMilliseconds));

bmp.Save("AurichRoads2-3.bmp");

//cls.LineSymbolizeHandlers[0] = cls.LineSymbolizeHandlers[1];

cls.LineSymbolizeHandlers[1] = new SharpMap.Rendering.Symbolizer.WarpedLineSymbolizeHander

{

Pattern =

SharpMap.Rendering.Symbolizer.WarpedLineSymbolizer.GetZigZag(4, 4),

Line = new System.Drawing.Pen(System.Drawing.Color.Firebrick, 1),

//Fill = new System.Drawing.SolidBrush(System.Drawing.Color.Firebrick)

};

sw.Reset(); sw.Start();

bmp = m.GetMap();

sw.Stop();

System.Console.WriteLine(string.Format("Rendering new method: {0}ms", sw.ElapsedMilliseconds));

bmp.Save("AurichRoads3.bmp");

}

[NUnit.Framework.Test]

public void TestCachedLineSymbolizerInTheme()

{

if (!System.IO.File.Exists("d:\\daten\\GeoFabrik\\Aurich\\roads.shp"))

throw new NUnit.Framework.IgnoreException("");

var p = new SharpMap.Data.Providers.ShapeFile(@"d:\\daten\\GeoFabrik\\Aurich\\roads.shp", false);

var l = new SharpMap.Layers.VectorLayer("roads", p);

var theme = new ClsTheme(l.Style);

l.Theme = theme;

var m = new SharpMap.Map(new System.Drawing.Size(720, 540)) { BackColor = System.Drawing.Color.Cornsilk };

m.Layers.Add(l);

m.ZoomToExtents();

var sw = new System.Diagnostics.Stopwatch();

sw.Start();

var bmp = m.GetMap();

sw.Stop();

System.Console.WriteLine(string.Format("Rendering new method: {0}ms", sw.ElapsedMilliseconds));

bmp.Save("AurichRoads1Theme.bmp");

}

internal class ClsTheme : SharpMap.Rendering.Thematics.ITheme

{

private SharpMap.Styles.VectorStyle _style;

public ClsTheme(SharpMap.Styles.VectorStyle style)

{

_style = style;

}

#region Implementation of ITheme

/// <summary>

/// Returns the style based on a feature

/// </summary>

/// <param name="attribute">Set of attribute values to calculate the <see cref="SharpMap.Styles.IStyle"/> from</param>

/// <returns>The style</returns>

public SharpMap.Styles.IStyle GetStyle(SharpMap.Data.FeatureDataRow attribute)

{

var res = _style;

var cls = new SharpMap.Rendering.Symbolizer.CachedLineSymbolizer();

cls.LineSymbolizeHandlers.Add(new SharpMap.Rendering.Symbolizer.PlainLineSymbolizeHandler { Line = new System.Drawing.Pen(System.Drawing.Color.Gold, 2) });

var wls = new SharpMap.Rendering.Symbolizer.WarpedLineSymbolizeHander

{

Pattern =

SharpMap.Rendering.Symbolizer.WarpedLineSymbolizer.

GetGreaterSeries(3, 3),

Line = new System.Drawing.Pen(System.Drawing.Color.Firebrick, 1)

,

Interval = 20

};

cls.LineSymbolizeHandlers.Add(wls);

cls.ImmediateMode = true;

res.LineSymbolizer = cls;

return res;

}

#endregion

}

[NUnit.Framework.Test]

public void TestTransformation()

{

var m = new SharpMap.Map(new System.Drawing.Size(640, 320));

var l = new SharpMap.Layers.Symbolizer.PuntalVectorLayer("l",

new SharpMap.Data.Providers.GeometryProvider(m.Factory.CreatePoint(new GeoAPI.Geometries.Coordinate(0, 51.478885))),

SharpMap.Rendering.Symbolizer.PathPointSymbolizer.CreateCircle(System.Drawing.Pens.Aquamarine, System.Drawing.Brushes.BurlyWood, 24));

var ctFact = new ProjNet.CoordinateSystems.Transformations.CoordinateTransformationFactory();

l.CoordinateTransformation = ctFact.CreateFromCoordinateSystems(ProjNet.CoordinateSystems.GeographicCoordinateSystem.WGS84, ProjNet.CoordinateSystems.ProjectedCoordinateSystem.WebMercator);

l.ReverseCoordinateTransformation = ctFact.CreateFromCoordinateSystems(ProjNet.CoordinateSystems.ProjectedCoordinateSystem.WebMercator, ProjNet.CoordinateSystems.GeographicCoordinateSystem.WGS84);

m.Layers.Add(new SharpMap.Layers.TileLayer(BruTile.Predefined.KnownTileSources.Create(),"b"));

m.Layers.Add(l);

var e = new GeoAPI.Geometries.Envelope(-0.02, 0.02, 51.478885 - 0.01, 51.478885 + 0.01);

e = GeoAPI.CoordinateSystems.Transformations.GeometryTransform.TransformBox(e,

l.CoordinateTransformation.MathTransform);

m.ZoomToBox(e);

m.GetMap().Save("Greenwich.png", System.Drawing.Imaging.ImageFormat.Png);

}

}