public IPen ToPen(float scale, PointF startPoint, PointF endPoint)
{
IPen pen = null;
if (Marker == null)
{
pen = base.ToPen(scale);
}
else
{
float width = GetWidth(scale);
IBrush brush = null;
SizeF size = Marker.Size;
int imgWidth = (int)Math.Ceiling(size.Width);
int imgHeight = (int)Math.Ceiling(size.Height);
Image <Rgba32> image = new Image <Rgba32>(imgWidth, imgHeight);
Rectangle rectangle = new Rectangle(0, 0, imgWidth, imgHeight);
float angle = DrawingHelper.GetAngle(startPoint, endPoint, true);
//foreach (var symbol in Marker.Symbols)
//{
// symbol.Angle += angle;
//}
//AffineTransformBuilder ats = new AffineTransformBuilder().AppendRotationRadians(angle, new System.Numerics.Vector2(imgWidth / 2f, imgHeight / 2f));
image.Mutate(x =>
{
Marker.DrawLegend(x, rectangle);
x.Rotate(angle);
});
//foreach (var symbol in Marker.Symbols)
//{
// symbol.Angle -= angle;
//}
brush = new ImageBrush(image);
float[] dashPattern = ToDashPattern(Pattern, startPoint, endPoint);
pen = new Pen(brush, width, dashPattern);
}
return(pen);
}
public float[] ToDashPattern(float[] pattern, PointF startPoint, PointF endPoint)
{
float[] dashPattern = null;
if (Marker == null)
{
dashPattern = pattern;
}
else
{
if (pattern != null)
{
switch (pattern.Length)
{
case 0:
dashPattern = pattern;
break;
case 1:
default:
SizeF size = Marker.Size;
int imgWidth = (int)Math.Ceiling(size.Width);
int imgHeight = (int)Math.Ceiling(size.Height);
switch (pattern.Length)
{
case 1:
float angle = DrawingHelper.GetAngle(startPoint, endPoint, false);
float totalLength = Convert.ToSingle(DrawingHelper.Distance(startPoint.X, startPoint.Y, endPoint.X, endPoint.Y));
float centerX = (startPoint.X + endPoint.X) / 2;
float centerY = (startPoint.Y + endPoint.Y) / 2;
float dy = Convert.ToSingle(imgWidth / 2.0 * Math.Sin(angle));
float dx = Convert.ToSingle(-imgWidth / 2.0 * Math.Cos(angle));
float x = centerX - dx;
float y = centerY - dy;
float firstLength = Convert.ToSingle(DrawingHelper.Distance(startPoint.X, startPoint.Y, x, y));
float secondLength = imgWidth;
float thirdLength = totalLength - firstLength - secondLength;
if (thirdLength > 0)
{
dashPattern = new float[]
{
0, firstLength, secondLength, thirdLength
};
}
break;
default:
dashPattern = new float[pattern.Length];
for (int i = 0; i < pattern.Length; i++)
{
if (i % 2 == 0)
{
dashPattern[i] = pattern[i] * imgWidth;
}
else
{
dashPattern[i] = pattern[i];
}
float item = pattern[i];
}
break;
}
break;
}
}
}
return(dashPattern);
}