public static void RenderArrow(this DrawingContext dc, Point pos, double height, Color color, Direcion dir, double scale)
{
var h = height;
var r = h * 0.40f * scale;
Point center = pos + new Vector(h * 0.50f, h * 0.50f * scale);
Vector a, b, c;
switch (dir)
{
case Direcion.Up:
case Direcion.Down:
if (dir == Direcion.Up)
{
r = -r;
}
a = new Vector(+0.000f, +0.750f) * r;
b = new Vector(-0.866f, -0.750f) * r;
c = new Vector(+0.866f, -0.750f) * r;
break;
case Direcion.Left:
case Direcion.Right:
if (dir == Direcion.Left)
{
r = -r;
}
a = new Vector(+0.750f, +0.000f) * r;
b = new Vector(-0.750f, +0.866f) * r;
c = new Vector(-0.750f, -0.866f) * r;
break;
default:
throw new ArgumentOutOfRangeException(nameof(dir));
}
var A = center + a;
var B = center + b;
var C = center + c;
PathFigure figure = new PathFigure(A,
new[] { new LineSegment(B, false), new LineSegment(C, false), new LineSegment(A, false) },
true);
figure.IsFilled = true;
PathGeometry path = new PathGeometry();
path.Figures.Add(figure);
dc.DrawGeometry(new Brush(color), new Pen(Color.Black, 1), path);
}
private static PathGeometry CreateArrowGeometry(Point pos, double height, Color color, Direcion dir, double scale)
{
var h = height;
var r = h * 0.40f * scale;
Point center = pos + new Vector(h * 0.50f, h * 0.50f * scale);
Vector a, b, c;
switch (dir)
{
case Direcion.Up:
case Direcion.Down:
if (dir == Direcion.Up)
{
r = -r;
}
a = new Vector(+0.000f, +0.750f) * r;
b = new Vector(-0.866f, -0.750f) * r;
c = new Vector(+0.866f, -0.750f) * r;
break;
case Direcion.Left:
case Direcion.Right:
if (dir == Direcion.Left)
{
r = -r;
}
a = new Vector(+0.750f, +0.000f) * r;
b = new Vector(-0.750f, +0.866f) * r;
c = new Vector(-0.750f, -0.866f) * r;
break;
default:
throw new ArgumentOutOfRangeException(nameof(dir));
}
var A = center + a;
var B = center + b;
var C = center + c;
PathFigure figure = new PathFigure(A,
new[] { new LineSegment(B, false), new LineSegment(C, false), new LineSegment(A, false) },
true);
figure.IsFilled = true;
PathGeometry path = new PathGeometry();
path.Figures.Add(figure);
return(path);
}
static void Go(Direcion direcion)
{
Console.WriteLine(string.Format("{0} gone.", direcion.ToString()));
}
