public Vertex(PdfPath.Line leftEdge, PdfPath.Line rightEdge)
{
AngleBisectorSlope = double.NaN;
AngleBisectorIntercept = double.NaN;
AngleBisector = double.NaN;
if (leftEdge.To.Equals(rightEdge.From))
{
IsValid = true;
}
LeftEdge = leftEdge;
RightEdge = rightEdge;
if (IsValid)
{
AngleBisector = Angle(LeftEdge, RightEdge) / 2.0;
// Rotate
var deltaX = (double)(LeftEdge.From.X - LeftEdge.To.X);
var deltaY = (double)(LeftEdge.From.Y - LeftEdge.To.Y);
var cos = Math.Cos(AngleBisector);
var sin = Math.Sin(AngleBisector);
var newX = cos * deltaX - sin * deltaY + (double)LeftEdge.To.X;
var newY = sin * deltaX + cos * deltaY + (double)LeftEdge.To.Y;
AngleBisectorRay = new PdfPath.Line(LeftEdge.To, new PdfPoint(newX, newY));
AngleBisectorSlope = (double)((AngleBisectorRay.To.Y - AngleBisectorRay.From.Y) / (AngleBisectorRay.To.X - AngleBisectorRay.From.X));
AngleBisectorIntercept = (double)AngleBisectorRay.To.Y - AngleBisectorSlope * (double)AngleBisectorRay.To.X;
}
}
public static double DistancePointToLine(PdfPath.Line line, PdfPoint point)
{
var denominator = Math.Sqrt((double)(line.To.Y - line.From.Y) * (double)(line.To.Y - line.From.Y) +
(double)(line.To.X - line.From.X) * (double)(line.To.X - line.From.X));
var numerator = (double)Math.Abs((line.To.Y - line.From.Y) * point.X - (line.To.X - line.From.X) * point.Y +
line.To.X * line.From.Y - line.To.Y * line.From.X);
return(numerator / denominator);
}
private double Angle(PdfPath.Line line1, PdfPath.Line line2)
{
var angle = (Math.Atan2((double)(line1.From.Y - line1.To.Y), (double)(line1.From.X - line1.To.X))
- Math.Atan2((double)(line2.From.Y - line2.To.Y), (double)(line2.From.X - line2.To.X)));
angle = Math.Sign(angle) * Math.PI - angle;
if (angle < 0)
{
angle += 2 * Math.PI;
}
return(angle);
}