/// <summary>
/// Creates a curve of the form of an octagon large enough to inscribe a rectangle
/// of width and height around center.
/// </summary>
/// <param name="width">the inscribed rectangle width</param>
/// <param name="height">the inscribed rectangle height</param>
/// <param name="center">the inscribed rectangle (and octagon) center</param>
/// <returns></returns>
public static ICurve CreateOctagon(double width, double height, Point center)
{
double w = width / 2;
double h = height / 2;
Point[] ps = new Point[8];
// Pad out horizontally
ps[0] = new Point(w + (octagonPad * w), h - (h * octagonPad));
ps[3] = new Point(-ps[0].X, ps[0].Y);
ps[4] = new Point(ps[3].X, -ps[3].Y);
ps[7] = new Point(ps[0].X, -ps[0].Y);
// Pad out vertically
ps[1] = new Point(w - (w * octagonPad), h + (h * octagonPad));
ps[2] = new Point(-ps[1].X, ps[1].Y);
ps[6] = new Point(ps[1].X, -ps[1].Y);
ps[5] = new Point(ps[2].X, -ps[2].Y);
for (int i = 0; i < 8; i++)
{
ps[i] += center;
}
Curve c = new Curve(8);
Curve.AddLineSegment(c, ps[0], ps[1]);
for (int i = 2; i < 8; i++)
{
Curve.ContinueWithLineSegment(c, ps[i]);
}
Curve.CloseCurve(c);
return(c);
}
/// <summary>
/// Creates curve resembling a house within the rectangle formed by width and height at center
/// (if the rectangle is a square, the house has the shape of home plate in baseball).
/// </summary>
/// <param name="width">the bounding rectangle width</param>
/// <param name="height">the bounding rectangle height</param>
/// <param name="center">the bounding rectangle center</param>
/// <returns></returns>
static public ICurve CreateInteriorHouse(double width, double height, Point center)
{
double w = width / 2;
double h = height / 2;
double x = center.X;
double y = center.Y;
Curve c = new Curve(4);
Curve.AddLineSegment(c, x - w, y - h, x + w, y - h);
Curve.ContinueWithLineSegment(c, x + w, y);
Curve.ContinueWithLineSegment(c, x, y + h);
Curve.ContinueWithLineSegment(c, x - w, y);
Curve.CloseCurve(c);
return(c);
}
internal Curve ToCurve()
{
var c = new Curve();
Curve.AddLineSegment(c, StartPoint.Point, StartPoint.Next.Point);
PolylinePoint p = StartPoint.Next;
while ((p = p.Next) != null)
{
Curve.ContinueWithLineSegment(c, p.Point);
}
if (Closed)
{
Curve.ContinueWithLineSegment(c, StartPoint.Point);
}
return(c);
}
/// <summary>
/// testing, don't use
/// </summary>
/// <param name="width"></param>
/// <param name="height"></param>
/// <returns></returns>
public static ICurve CreateTestShape(double width, double height)
{
int mult = 1;
double w = width * 3;
double h = height * 3;
Curve curve = new Curve(9);
Curve.AddLineSegment(curve, -w, -h, 0, -h / 2);
Curve.ContinueWithLineSegment(curve, w / 2, -0.75 * h);
Curve.ContinueWithLineSegment(curve, w, -h);
Curve.ContinueWithLineSegment(curve, 0.75 * w, -h / 2);
Curve.ContinueWithLineSegment(curve, w / 2, 0);
Curve.ContinueWithLineSegment(curve, w, h);
Curve.ContinueWithLineSegment(curve, 0, h / 2);
Curve.ContinueWithLineSegment(curve, -w, mult * h);
Curve.ContinueWithLineSegment(curve, -w / 3, 0);
Curve.CloseCurve(curve);
return(curve);
}
