/// <summary>
/// Find the intersection points of an arc and the infinite line p1-p2
/// that is closest to point p1.
/// </summary>
/// <param name="p1"></param>
/// <param name="p2"></param>
/// <param name="result"></param>
/// <returns></returns>
public override bool GetNearestIntersectionPoint(PointF p1, PointF p2, out PointF result)
{
RectangleF a = Bounds;
float num = PenWidth / 2f;
GoObject.InflateRect(ref a, num, num);
return(GoEllipse.NearestIntersectionOnArc(a, p1, p2, out result, StartAngle, SweepAngle));
}
/// <summary>
/// Create and initialize a <see cref="T:Northwoods.Go.GoShape" />.
/// </summary>
/// <param name="p">the <see cref="T:Northwoods.Go.GoPort" /> created for this node by <see cref="M:Northwoods.Go.GoBasicNode.CreatePort" /></param>
/// <returns>
/// By default this returns a <see cref="T:Northwoods.Go.GoEllipse" /> that is somewhat larger than the port <paramref name="p" />.
/// </returns>
/// <remarks>
/// By default the ellipse uses a white brush--set the <see cref="P:Northwoods.Go.GoBasicNode.Pen" />
/// and <see cref="P:Northwoods.Go.GoBasicNode.Brush" /> properties to change the appearance.
/// The shape is not itself selectable, resizable, or reshapable.
/// </remarks>
/// <example>
/// If you override this method, you may want the definition to do
/// some of the things that the standard definition does:
/// <code>
/// protected virtual GoShape CreateShape(GoPort p) {
/// // create the bigger circle/ellipse around and behind the port
/// GoShape e = new GoEllipse();
/// SizeF psize = p.Size;
/// e.Size = new SizeF(psize.Width + 2*7, psize.Height + 2*7);
/// e.Selectable = false;
/// e.Resizable = false;
/// e.Reshapable = false;
/// e.Brush = GoShape.Brushes_White;
/// return e;
/// }
/// </code>
/// </example>
protected virtual GoShape CreateShape(GoPort p)
{
GoEllipse goEllipse = new GoEllipse();
SizeF size = p.Size;
goEllipse.Size = new SizeF(size.Width + 2f * DefaultShapeMargin.Width, size.Height + 2f * DefaultShapeMargin.Height);
goEllipse.Selectable = false;
goEllipse.Resizable = false;
goEllipse.Reshapable = false;
goEllipse.Brush = GoShape.Brushes_White;
return(goEllipse);
}
/// <summary>
/// The closest point of a cylinder that intersects with a given line
/// is the closest such point of each two line segments and two ellipses.
/// </summary>
/// <param name="p1"></param>
/// <param name="p2"></param>
/// <param name="result"></param>
/// <returns></returns>
public override bool GetNearestIntersectionPoint(PointF p1, PointF p2, out PointF result)
{
RectangleF bounds = Bounds;
float shift = PenWidth / 2f;
PointF[] points = getPoints();
PointF a = GoShape.ExpandPointOnEdge(points[0], bounds, shift);
PointF b = GoShape.ExpandPointOnEdge(points[1], bounds, shift);
PointF a2 = GoShape.ExpandPointOnEdge(points[2], bounds, shift);
PointF b2 = GoShape.ExpandPointOnEdge(points[3], bounds, shift);
float num = 1E+21f;
PointF pointF = default(PointF);
RectangleF rect;
RectangleF rect2;
float startAngle;
float startAngle2;
if (Orientation == Orientation.Vertical)
{
rect = new RectangleF(bounds.X, bounds.Y, bounds.Width, MinorRadius * 2f);
rect2 = new RectangleF(bounds.X, bounds.Y + bounds.Height - MinorRadius * 2f, bounds.Width, MinorRadius * 2f);
startAngle = 180f;
startAngle2 = 0f;
}
else
{
rect = new RectangleF(bounds.X, bounds.Y, MinorRadius * 2f, bounds.Height);
rect2 = new RectangleF(bounds.X + bounds.Width - MinorRadius * 2f, bounds.Y, MinorRadius * 2f, bounds.Height);
startAngle = 90f;
startAngle2 = 270f;
}
if (GoEllipse.NearestIntersectionOnArc(rect, p1, p2, out PointF result2, startAngle, 180f))
{
float num2 = (result2.X - p1.X) * (result2.X - p1.X) + (result2.Y - p1.Y) * (result2.Y - p1.Y);
if (num2 < num)
{
num = num2;
pointF = result2;
}
}
if (Orientation == Orientation.Horizontal)
{
if (GoEllipse.NearestIntersectionOnArc(rect2, p1, p2, out result2, 270f, 90f))
{
float num3 = (result2.X - p1.X) * (result2.X - p1.X) + (result2.Y - p1.Y) * (result2.Y - p1.Y);
if (num3 < num)
{
num = num3;
pointF = result2;
}
}
if (GoEllipse.NearestIntersectionOnArc(rect2, p1, p2, out result2, 0f, 90f))
{
float num4 = (result2.X - p1.X) * (result2.X - p1.X) + (result2.Y - p1.Y) * (result2.Y - p1.Y);
if (num4 < num)
{
num = num4;
pointF = result2;
}
}
}
else if (GoEllipse.NearestIntersectionOnArc(rect2, p1, p2, out result2, startAngle2, 180f))
{
float num5 = (result2.X - p1.X) * (result2.X - p1.X) + (result2.Y - p1.Y) * (result2.Y - p1.Y);
if (num5 < num)
{
num = num5;
pointF = result2;
}
}
if (GoStroke.NearestIntersectionOnLine(a, b, p1, p2, out result2))
{
float num6 = (result2.X - p1.X) * (result2.X - p1.X) + (result2.Y - p1.Y) * (result2.Y - p1.Y);
if (num6 < num)
{
num = num6;
pointF = result2;
}
}
if (GoStroke.NearestIntersectionOnLine(a2, b2, p1, p2, out result2))
{
float num7 = (result2.X - p1.X) * (result2.X - p1.X) + (result2.Y - p1.Y) * (result2.Y - p1.Y);
if (num7 < num)
{
num = num7;
pointF = result2;
}
}
result = pointF;
return(num < 1E+21f);
}
/// <summary>
/// Find the intersection points of a pie and the infinite line p1-p2
/// that is closest to point p1.
/// </summary>
/// <param name="p1"></param>
/// <param name="p2"></param>
/// <param name="result"></param>
/// <returns></returns>
public override bool GetNearestIntersectionPoint(PointF p1, PointF p2, out PointF result)
{
RectangleF a = Bounds;
float num = PenWidth / 2f;
GoObject.InflateRect(ref a, num, num);
float num2 = a.Width / 2f;
float num3 = a.Height / 2f;
float num4 = a.X + num2;
float num5 = a.Y + num3;
float num6 = p1.X - num4;
float num7 = p1.Y - num5;
float startAngle = StartAngle;
float sweepAngle = SweepAngle;
float num8 = startAngle + sweepAngle;
if (num8 > 360f)
{
num8 -= 360f;
}
bool result2 = false;
float num9 = 1E+21f;
result = default(PointF);
if (-0.01f < num6 && num6 < 0.01f)
{
num6 = 0.01f;
}
if (-0.01f < num7 && num7 < 0.01f)
{
num7 = 0.01f;
}
PointF result3;
if (sweepAngle >= 360f)
{
if (GoEllipse.NearestIntersectionOnEllipse(a, p1, p2, out result3))
{
float num10 = (p1.X - result3.X) * (p1.X - result3.X) + (p1.Y - result3.Y) * (p1.Y - result3.Y);
if (num10 < num9)
{
result2 = true;
result = result3;
num9 = num10;
}
}
}
else if (sweepAngle + startAngle > 360f)
{
if (GoEllipse.NearestIntersectionOnArc(a, p1, p2, out result3, startAngle, 360f - startAngle))
{
float num11 = (p1.X - result3.X) * (p1.X - result3.X) + (p1.Y - result3.Y) * (p1.Y - result3.Y);
if (num11 < num9)
{
result2 = true;
result = result3;
num9 = num11;
}
}
if (GoEllipse.NearestIntersectionOnArc(a, p1, p2, out result3, 0f, sweepAngle - (360f - startAngle)))
{
float num12 = (p1.X - result3.X) * (p1.X - result3.X) + (p1.Y - result3.Y) * (p1.Y - result3.Y);
if (num12 < num9)
{
result2 = true;
result = result3;
num9 = num12;
}
}
}
else if (GoEllipse.NearestIntersectionOnArc(a, p1, p2, out result3, startAngle, sweepAngle))
{
float num13 = (p1.X - result3.X) * (p1.X - result3.X) + (p1.Y - result3.Y) * (p1.Y - result3.Y);
if (num13 < num9)
{
result2 = true;
result = result3;
num9 = num13;
}
}
PointF pointAtAngle = GetPointAtAngle(startAngle);
if (GoStroke.NearestIntersectionOnLine(new PointF(num4, num5), pointAtAngle, p1, p2, out result3))
{
float num14 = (p1.X - result3.X) * (p1.X - result3.X) + (p1.Y - result3.Y) * (p1.Y - result3.Y);
if (num14 < num9)
{
result2 = true;
result = result3;
num9 = num14;
}
}
PointF pointAtAngle2 = GetPointAtAngle(num8);
if (GoStroke.NearestIntersectionOnLine(new PointF(num4, num5), pointAtAngle2, p1, p2, out result3))
{
float num15 = (p1.X - result3.X) * (p1.X - result3.X) + (p1.Y - result3.Y) * (p1.Y - result3.Y);
if (num15 < num9)
{
result2 = true;
result = result3;
num9 = num15;
}
}
return(result2);
}
