public void SetClearancePointTest()
{
var c = new Catenary(new Vector2(15, 100), 300, 50, 1.15, 770);
var point = new Vector2(50.0, 95.0);
c.SetClearancePoint(point);
var x = point.X;
var actual = new Vector2(x, c.CatenaryFunction(x));
CollectionAssert.AreEqual(point, actual, Extensions.AbsComparer(1e-3));
}
public void Render(Graphics g, RectangleF target)
{
Canvas canvas = GetCanvasFor(target);
Style.SetGraphicsQuality(g);
Catenary catenary = RulingSpan.FindCatenaryFromX(mouse_over.X);
foreach (var item in RulingSpan.Spans)
{
RenderOne(g, canvas, item, Style, catenary == item);
}
if (!mouse_dn.IsZero)
{
catenary = RulingSpan.FindCatenaryFromX(mouse_dn.X);
if (catenary != null)
{
double y = catenary.CatenaryFunction(mouse_dn.X);
PointF A = canvas.Map(mouse_dn.X, y);
PointF M = canvas.Map(mouse_dn);
string text = Math.Abs(y - mouse_dn.Y).ToString("0.#");
Style.VerticalArrow(g, M.X, M.Y, A.Y, text, false);
}
using (Pen pen = Style.MakePen(Color.Red))
{
PointF M = canvas.Map(mouse_dn);
g.DrawEllipse(pen,
M.X - Style.PointWidth / 2,
M.Y - Style.PointWidth / 2,
Style.PointWidth,
Style.PointWidth);
using (Font font = Style.MakeFont(SystemFonts.DialogFont))
{
string text = string.Format("x:{0:0}\ny:{1:0.#}", mouse_dn.X, mouse_dn.Y);
StringFormat sf = new StringFormat();
SizeF sz = g.MeasureString(text, font, M, sf);
g.FillRectangle(Brushes.White, M.X - sz.Width - 4, M.Y - 4, sz.Width + 2, sz.Height + 2);
g.DrawString(text, font, Brushes.Red, M.X - sz.Width - 2, M.Y - 2, sf);
}
}
}
}
