private void DrawPolygon(PolygonBase polygon, Graphics graphs)
{
if (polygon.Vertices.Count < 2)
return;
var path = new GraphicsPath();
if (polygon.IsClosedFigure) path.StartFigure();
path.AddLines(polygon.Vertices.ToPoints());
if (polygon.IsClosedFigure) path.CloseFigure();
using (var b = new SolidBrush(polygon.FillColor))
using (var p = new Pen(polygon.OutlineColor, polygon.OutlineWidth))
{
p.DashStyle = polygon.OutlineDash;
if (polygon.GetShapeType() != ShapeType.FreePencil) graphs.FillPath(b, path);
//_filler.FillByScanline(graphs, polygon, polygon.FillColor);
graphs.DrawPath(p, path);
}
}
public void ScanLineFillPolygon(Graphics graph, PolygonBase shape, Color color)
{
if (shape.Vertices.Count < 3)
return;
if (shape.GetShapeType() == ShapeType.FreePencil)
return;
var rec = new Rectangle(Point.Round(shape.Location), Size.Round(shape.Size));
if (rec.Location.Equals(Point.Empty))
return;
rec.X -= 1;
rec.Y -= 1;
rec.Width += 2;
rec.Height += 2;
//var h = rec.Y + 1;
var h = rec.Y + rec.Height;
var et = new SortedDoublyLinkedList<CActiveEdge>[h];
var active = new SortedDoublyLinkedList<CActiveEdge>();
for (int i = 0; i < h; i++)
et[i] = new SortedDoublyLinkedList<CActiveEdge>();
BuildEdgeList(shape.Vertices.ToList(), ref et);
//for (int i = rec.Y - rec.Height; i < rec.Y; i++)
for (int i = rec.Y; i < rec.Y + rec.Height; i++)
{
buildActiveList(ref active, ref et[i]);
if (active.Count != 0)
{
using (var p = new Pen(color, 1F))
FillScan(i, ref active, graph, p);
updateEdgeList(i, ref active);
active.Sort();
}
}
}
