/// <summary>
/// Appends the specified polygon to the graphics path.
/// </summary>
/// <param name="vertices">The vertices.</param>
/// <param name="shpx">The shape range.</param>
/// <param name="borderPath">The border path.</param>
/// <param name="args">The map arguments.</param>
/// <param name="shClip">The southerland hodgmen polygon clipper.</param>
private static void BuildPolygon(double[] vertices, ShapeRange shpx, GraphicsPath borderPath, MapArgs args, SoutherlandHodgman shClip)
{
double minX = args.MinX;
double maxY = args.MaxY;
double dx = args.Dx;
double dy = args.Dy;
for (int prt = 0; prt < shpx.Parts.Count; prt++)
{
PartRange prtx = shpx.Parts[prt];
int start = prtx.StartIndex;
int end = prtx.EndIndex;
var points = new List <double[]>(end - start + 1);
for (int i = start; i <= end; i++)
{
var pt = new[] { (vertices[i * 2] - minX) * dx, (maxY - vertices[(i * 2) + 1]) * dy };
points.Add(pt);
}
if (shClip != null)
{
points = shClip.Clip(points);
}
var intPoints = DuplicationPreventer.Clean(points).ToArray();
if (intPoints.Length < 2)
{
continue;
}
borderPath.StartFigure();
borderPath.AddLines(intPoints);
}
}
/// <summary>
/// Adds the given points to the given path.
/// </summary>
/// <param name="path">Path the points get added to.</param>
/// <param name="args">MapArgs used for clipping.</param>
/// <param name="extent">Extent of the feature used for clipping.</param>
/// <param name="points">Points that get added to the path.</param>
/// <param name="clipRect">The clipping rectangle.</param>
private static void AddLineStringToPath(GraphicsPath path, MapArgs args, Extent extent, List <double[]> points, Rectangle clipRect)
{
List <List <double[]> > multiLinestrings;
if (!extent.Within(args.GeographicExtents))
{
multiLinestrings = CohenSutherland.ClipLinestring(points, clipRect.Left, clipRect.Top, clipRect.Right, clipRect.Bottom);
}
else
{
multiLinestrings = new List <List <double[]> >
{
points
};
}
foreach (List <double[]> linestring in multiLinestrings)
{
var intPoints = DuplicationPreventer.Clean(linestring).ToArray();
if (intPoints.Length < 2)
{
continue;
}
path.StartFigure();
path.AddLines(intPoints);
}
}
internal static void BuildLineString(GraphicsPath path, double[] vertices, ShapeRange shpx, MapArgs args, Rectangle clipRect)
{
double minX = args.MinX;
double maxY = args.MaxY;
double dx = args.Dx;
double dy = args.Dy;
for (int prt = 0; prt < shpx.Parts.Count; prt++)
{
PartRange prtx = shpx.Parts[prt];
int start = prtx.StartIndex;
int end = prtx.EndIndex;
var points = new List <double[]>(end - start + 1);
for (int i = start; i <= end; i++)
{
var pt = new[]
{
(vertices[i * 2] - minX) * dx,
(maxY - vertices[i * 2 + 1]) * dy
};
points.Add(pt);
}
List <List <double[]> > multiLinestrings;
if (!shpx.Extent.Within(args.GeographicExtents))
{
multiLinestrings = CohenSutherland.ClipLinestring(points, clipRect.Left, clipRect.Top,
clipRect.Right, clipRect.Bottom);
}
else
{
multiLinestrings = new List <List <double[]> > {
points
};
}
foreach (List <double[]> linestring in multiLinestrings)
{
var intPoints = DuplicationPreventer.Clean(linestring).ToArray();
if (intPoints.Length < 2)
{
continue;
}
path.StartFigure();
path.AddLines(intPoints);
}
}
}
/// <summary>
/// Appends the specified polygon to the graphics path.
/// </summary>
private static void BuildPolygon(double[] vertices, ShapeRange shpx, GraphicsPath borderPath, MapArgs args, SoutherlandHodgman shClip)
{
double minX = args.MinX;
double maxY = args.MaxY;
double dx = args.Dx;
double dy = args.Dy;
for (int prt = 0; prt < shpx.Parts.Count; prt++)
{
PartRange prtx = shpx.Parts[prt];
int start = prtx.StartIndex;
int end = prtx.EndIndex;
List <double[]> points = new List <double[]>();
for (int i = start; i <= end; i++)
{
double[] pt = new double[2];
pt[X] = (vertices[i * 2] - minX) * dx;
pt[Y] = (maxY - vertices[i * 2 + 1]) * dy;
points.Add(pt);
}
if (null != shClip)
{
points = shClip.Clip(points);
}
List <Point> intPoints = DuplicationPreventer.Clean(points);
if (intPoints.Count < 2)
{
points.Clear();
continue;
}
//Would be nice to figure out how to get rid of this lock
lock (lock1)
{
borderPath.StartFigure();
Point[] pointArray = intPoints.ToArray();
borderPath.AddLines(pointArray);
}
points.Clear();
}
}