/// <summary>
/// Overrides <see cref="CADability.Curve2D.GeneralCurve2D.HitTest (ref BoundingRect, bool)"/>
/// </summary>
/// <param name="Rect"></param>
/// <param name="IncludeControlPoints"></param>
/// <returns></returns>
public override bool HitTest(ref BoundingRect Rect, bool IncludeControlPoints)
{
ClipRect clr = new ClipRect(ref Rect);
if (clr.ArcHitTest(center, radius, 0, new GeoPoint2D(center.x + radius, center.y), new GeoPoint2D(center.x, center.y + radius)))
{
return(true);
}
if (clr.ArcHitTest(center, radius, 1, new GeoPoint2D(center.x, center.y + radius), new GeoPoint2D(center.x - radius, center.y)))
{
return(true);
}
if (clr.ArcHitTest(center, radius, 2, new GeoPoint2D(center.x - radius, center.y), new GeoPoint2D(center.x, center.y - radius)))
{
return(true);
}
if (clr.ArcHitTest(center, radius, 3, new GeoPoint2D(center.x, center.y - radius), new GeoPoint2D(center.x + radius, center.y)))
{
return(true);
}
return(false);
}
/// <summary>
/// Overrides <see cref="CADability.Curve2D.GeneralCurve2D.HitTest (ref BoundingRect, bool)"/>
/// </summary>
/// <param name="Rect"></param>
/// <param name="IncludeControlPoints"></param>
/// <returns></returns>
public override bool HitTest(ref BoundingRect Rect, bool IncludeControlPoints)
{
if (sweep < 0)
{ // 19.8.15: bin nicht sicher, ob das mit negativem sweep auch geht, deshalb hier umdrehen
return((new Arc2D(Center, Radius, start + sweep, -sweep)).HitTest(ref Rect, IncludeControlPoints));
}
ClipRect clr = new ClipRect(ref Rect);
int StartQuadrant = start.Quadrant;
int EndQuadrant = (start + sweep).Quadrant;
int numQuads;
if (sweep < 0.0)
{
numQuads = StartQuadrant - EndQuadrant;
}
else
{
numQuads = EndQuadrant - StartQuadrant;
}
if (numQuads < 0)
{
numQuads += 4;
}
// siehe bei GetExtent, die folgende Abfrage war falsch!
// if (Math.Abs(sweep) > 2 * Math.PI / 3) numQuads = 4; // mehr als 270°
if (EndQuadrant == StartQuadrant)
{ // wenns mehr als halbrum geht, dann ganzrum
if (Math.Abs(sweep) > Math.PI)
{
numQuads = 4;
}
}
BoundingRect res = BoundingRect.EmptyBoundingRect;
int q = StartQuadrant;
// im Folgenden die ganz überschrittenen Quadranten betrachten, also ganze Viertelbögen
for (int i = 1; i < numQuads; ++i) // [hier war < numQuads, es muss aber <= heißen, sonst funktionierts nicht immer]<- das ist falsch, es muss < sein,
{ // ganze Viertelbögen betrachten
// q startet mit dem StartQuadranten, also zuerst quadranten weiterschalten
if (sweep < 0.0)
{
q -= 1;
}
else
{
q += 1;
}
if (q < 0)
{
q += 4;
}
if (q > 3)
{
q -= 4;
}
switch (q) // Achse zur Rechten betrachten
{
case 0:
if (clr.ArcHitTest(Center, Radius, 0, new GeoPoint2D(Center.x + Radius, Center.y), new GeoPoint2D(Center.x, Center.y + Radius)))
{
return(true);
}
break;
case 1:
if (clr.ArcHitTest(Center, Radius, 1, new GeoPoint2D(Center.x, Center.y + Radius), new GeoPoint2D(Center.x - Radius, Center.y)))
{
return(true);
}
break;
case 2:
if (clr.ArcHitTest(Center, Radius, 2, new GeoPoint2D(Center.x - Radius, Center.y), new GeoPoint2D(Center.x, Center.y - Radius)))
{
return(true);
}
break;
case 3:
if (clr.ArcHitTest(Center, Radius, 3, new GeoPoint2D(Center.x, Center.y - Radius), new GeoPoint2D(Center.x + Radius, Center.y)))
{
return(true);
}
break;
}
}
if (numQuads == 0)
{ // Start und Ende im selben Quadranten
// nur das Bogenstück selbst betrachten
if (sweep > 0.0)
{
if (clr.ArcHitTest(Center, Radius, StartQuadrant % 4, StartPoint, EndPoint))
{
return(true);
}
}
else
{
if (clr.ArcHitTest(Center, Radius, StartQuadrant % 4, EndPoint, StartPoint))
{
return(true);
}
}
}
else
{
// Start und Ende in verschiedenen Quadranten
// zwei Abschnitte betrachten
if (sweep > 0.0)
{
GeoPoint2D p1;
switch (StartQuadrant) // Achse zur Rechten betrachten
{
default:
case 0:
p1 = new GeoPoint2D(Center.x, Center.y + Radius);
break;
case 1:
p1 = new GeoPoint2D(Center.x - Radius, Center.y);
break;
case 2:
p1 = new GeoPoint2D(Center.x, Center.y - Radius);
break;
case 3:
p1 = new GeoPoint2D(Center.x + Radius, Center.y);
break;
}
if (clr.ArcHitTest(Center, Radius, StartQuadrant % 4, StartPoint, p1))
{
return(true);
}
switch (EndQuadrant) // Achse zur Rechten betrachten
{
default:
case 1:
p1 = new GeoPoint2D(Center.x, Center.y + Radius);
break;
case 2:
p1 = new GeoPoint2D(Center.x - Radius, Center.y);
break;
case 3:
p1 = new GeoPoint2D(Center.x, Center.y - Radius);
break;
case 0:
p1 = new GeoPoint2D(Center.x + Radius, Center.y);
break;
}
if (clr.ArcHitTest(Center, Radius, EndQuadrant % 4, p1, EndPoint))
{
return(true);
}
}
else
{
GeoPoint2D p1;
switch (StartQuadrant) // Achse zur Rechten betrachten
{
default:
case 1:
p1 = new GeoPoint2D(Center.x, Center.y + Radius);
break;
case 2:
p1 = new GeoPoint2D(Center.x - Radius, Center.y);
break;
case 3:
p1 = new GeoPoint2D(Center.x, Center.y - Radius);
break;
case 0:
p1 = new GeoPoint2D(Center.x + Radius, Center.y);
break;
}
if (clr.ArcHitTest(Center, Radius, StartQuadrant % 4, p1, StartPoint))
{
return(true);
}
switch (EndQuadrant) // Achse zur Rechten betrachten
{
default:
case 0:
p1 = new GeoPoint2D(Center.x, Center.y + Radius);
break;
case 1:
p1 = new GeoPoint2D(Center.x - Radius, Center.y);
break;
case 2:
p1 = new GeoPoint2D(Center.x, Center.y - Radius);
break;
case 3:
p1 = new GeoPoint2D(Center.x + Radius, Center.y);
break;
}
if (clr.ArcHitTest(Center, Radius, EndQuadrant % 4, EndPoint, p1))
{
return(true);
}
}
}
return(false);
}