public override void AddToPath(IGraphicsPath graphicsPath)
{
var pathData = graphicsPath.PathData;
var points = pathData.Points;
if (points.Length <= 0)
{
return;
}
// Important for custom line caps. Force the path the close with an explicit line, not just an implicit close of the figure.
var last = points.Length - 1;
if (!points[0].Equals(points[last]))
{
var i = last;
while (i > 0 && pathData.Types[i] > 0)
{
--i;
}
graphicsPath.AddLine(points[last], points[i]);
}
graphicsPath.CloseFigure();
}
private static IGraphicsPath ConvertPolygon(IDisplay display, IPolygon polygon, IGraphicsPath gp)
{
//if (polygon == null || polygon.RingCount == 0)
// return null;
for (int r = 0; r < polygon.RingCount; r++)
{
bool first = true;
int count = 0;
IRing ring = polygon[r];
int pCount = ring.PointCount;
//double o_x = -1e10, o_y = -1e10;
float o_x = float.MinValue, o_y = float.MinValue;
gp.StartFigure();
for (int p = 0; p < pCount; p++)
{
IPoint point = ring[p];
double x = point.X, y = point.Y;
display.World2Image(ref x, ref y);
//
// Auf 0.1 Pixel runden, sonst kann es bei fast
// horizontalen (vertikalen) Linien zu Fehlern kommen
// -> Eine hälfte (beim Bruch) wird nicht mehr gezeichnet
//
x = Math.Round(x, 1);
y = Math.Round(y, 1);
if (!((float)o_x == (float)x &&
(float)o_y == (float)y))
{
if (!first)
{
gp.AddLine(
(float)o_x,
(float)o_y,
(float)x,
(float)y);
count++;
}
else
{
first = false;
}
}
o_x = (float)x;
o_y = (float)y;
}
if (count > 0)
{
gp.CloseFigure();
}
}
return(gp);
}
private static IGraphicsPath ConvertEnvelope(IDisplay display, IEnvelope envelope, IGraphicsPath gp)
{
double minx = envelope.minx, miny = envelope.miny;
double maxx = envelope.maxx, maxy = envelope.maxy;
display.World2Image(ref minx, ref miny);
display.World2Image(ref maxx, ref maxy);
gp.StartFigure();
gp.AddLine((float)minx, (float)miny, (float)maxx, (float)miny);
gp.AddLine((float)maxx, (float)miny, (float)maxx, (float)maxy);
gp.AddLine((float)maxx, (float)maxy, (float)minx, (float)maxy);
gp.CloseFigure();
return(gp);
}
