private void LineTo(Vector p)
{
//Console.WriteLine("LineTo: " + p);
if (IntersectingPolygon == null)
{
IntersectingPolygon = new PolygonModel();
}
if (!GeomMath.AlmostEqual(currentStartPoint, p))
{
IntersectingPolygon.Lines.Add(new LineModel {
StartPoint = new Vector {
X = currentStartPoint.X, Y = currentStartPoint.Y
},
EndPoint = new Vector {
X = p.X, Y = p.Y
}
});
currentStartPoint = new Vector {
X = p.X, Y = p.Y
};
//currentStartPoint = p; // point becomes start of next line
}
}
public void AddPolygonLine(int xi1, int yi1, int xi2, int yi2,
double xv1, double yv1, double xv2, double yv2)
{
if (ActivePolygon == null)
{
ActivePolygon = new PolygonModel();
}
double xp1 = xi1 * Config.XIncrement + Config.XStart;
double yp1 = yi1 * Config.YIncrement + Config.YStart;
double xp2 = xi2 * Config.XIncrement + Config.XStart;
double yp2 = yi2 * Config.YIncrement + Config.YStart;
var line = new Line();
line.Stroke = new SolidColorBrush(Colors.Red);
line.StrokeThickness = 3;
line.Fill = new SolidColorBrush(Colors.Red);
line.X1 = xp1;
line.Y1 = yp1;
line.X2 = xp2;
line.Y2 = yp2;
ActivePolygon.Lines.Add(new LineModel
{
StartPoint = new Vector {
X = xv1, Y = yv1, Alternates = new CanvasPoint {
DotIndexLeft = xi1, DotIndexTop = yi1
}
},
EndPoint = new Vector {
X = xv2, Y = yv2, Alternates = new CanvasPoint {
DotIndexLeft = xi2, DotIndexTop = yi2
}
}
});
var cc = new CanvasComponent();
cc.AddUiElement(line);
line.Tag = ActivePolygon.Lines[ActivePolygon.Lines.Count - 1];
polygonLinesInProgress.Add(cc);
GetInputLayer().AddComponent(cc);
// if we're at least completing a triangle...
if (ActivePolygon.Lines.Count > 2)
{
// if endpoint of current line matches start point of first line, we're connecting
// back to start of polygon
if (GeomMath.AlmostEqual(new Vector {
X = xv2, Y = yv2
}, ActivePolygon.Lines[0].StartPoint))
{
CompletePolygon();
}
}
}
public bool AlmostEqual(DelaunayTriangle t2)
{
bool side1 = GeomMath.AlmostEqual(V1, t2.V1) || GeomMath.AlmostEqual(V1, t2.V2) || GeomMath.AlmostEqual(V1, t2.V3);
bool side2 = GeomMath.AlmostEqual(V2, t2.V1) || GeomMath.AlmostEqual(V2, t2.V2) || GeomMath.AlmostEqual(V2, t2.V3);
bool side3 = GeomMath.AlmostEqual(V3, t2.V1) || GeomMath.AlmostEqual(V3, t2.V2) || GeomMath.AlmostEqual(V3, t2.V3);
return(side1 && side2 && side3);
}
public bool HasVertex(Vector v)
{
return(GeomMath.AlmostEqual(V1, v) || GeomMath.AlmostEqual(V2, v) || GeomMath.AlmostEqual(V3, v));
}
public bool AlmostEquals(DelaunayEdge de)
{
return((GeomMath.AlmostEqual(VStart, de.VStart) && GeomMath.AlmostEqual(VEnd, de.VEnd)) ||
(GeomMath.AlmostEqual(VStart, de.VEnd) && GeomMath.AlmostEqual(VEnd, de.VStart)));
}