/// <summary>
/// Transforms a <see cref="Polygon"/> to an array of <see cref="PointF"/>s
/// </summary>
/// <param name="self">The polygon</param>
/// <param name="map">The map that defines the affine coordinate transformation.</param>
/// <param name="useClipping">Use clipping for the polygon</param>
/// <returns>An array of PointFs</returns>
public static GraphicsPath TransformToImage(this Polygon self, MapViewport map, bool useClipping = false)
{
var res = new GraphicsPath(FillMode.Alternate);
if (useClipping)
{
res.AddPolygon(VectorRenderer.ClipPolygon(
VectorRenderer.LimitValues(self.ExteriorRing.TransformToImage(map), VectorRenderer.ExtremeValueLimit),
map.Size.Width, map.Size.Height));
for (var i = 0; i < self.NumInteriorRings; i++)
{
res.AddPolygon(VectorRenderer.ClipPolygon(
VectorRenderer.LimitValues(self.GetInteriorRingN(i).TransformToImage(map), VectorRenderer.ExtremeValueLimit),
map.Size.Width, map.Size.Height));
}
}
else
{
res.AddPolygon(self.ExteriorRing.TransformToImage(map));
for (var i = 0; i < self.NumInteriorRings; i++)
{
res.AddPolygon(self.GetInteriorRingN(i).TransformToImage(map));
}
}
return(res);
}
/// <summary>
/// Function that actually renders the linestring
/// </summary>
/// <param name="map"></param>
/// <param name="lineString"></param>
/// <param name="graphics"></param>
protected override void OnRenderInternal(MapViewport map, ILineString lineString, Graphics graphics)
{
var gp = new GraphicsPath();
gp.AddLines(VectorRenderer.LimitValues(lineString.TransformToImage(map), VectorRenderer.ExtremeValueLimit));
if (ImmediateMode)
{
var tmp = new List <GraphicsPath>(new[] { gp });
Symbolize(graphics, map, tmp);
}
else
{
_graphicsPaths.Add(gp);
}
}
/// <summary>
/// Method that does the actual rendering of individual features.
/// </summary>
/// <param name="map">The map</param>
/// <param name="lineString">The linestring</param>
/// <param name="graphics">The graphics object</param>
protected override void OnRenderInternal(MapViewport map, ILineString lineString, Graphics graphics)
{
var pts = VectorRenderer.LimitValues(VectorRenderer.OffsetRight(lineString.TransformToImage(map), Offset), VectorRenderer.ExtremeValueLimit);
graphics.DrawLines(Line, pts);
}
/// <summary>
/// Method that does the actual rendering of individual features.
/// </summary>
/// <param name="map">The map</param>
/// <param name="lineString">The linestring</param>
/// <param name="graphics">The graphics object</param>
protected override void OnRenderInternal(MapViewport map, ILineString lineString, Graphics graphics)
{
graphics.DrawLines(Line, VectorRenderer.LimitValues(lineString.TransformToImage(map), VectorRenderer.ExtremeValueLimit));
}