public static Point2D[] GetIntersections(Circle2D circle, Line2D line, double precision)
{
Vector2D direction = line.Direction;
double lengthSquared = direction.GetLengthSquared();
Vector2D center = (Vector2D)circle.center;
Point2D point2D1 = line.Origin - center;
Point2D point2D2 = point2D1 + direction;
double num1 = point2D1.X * point2D2.Y - point2D2.X * point2D1.Y;
double num2 = circle.radius * circle.radius * lengthSquared - num1 * num1;
Point2D[] point2DArray = (Point2D[])null;
if (MathUtil.AreApproxEqual(0.0, num2, precision * precision))
{
double num3 = num1 * direction.Y;
double num4 = -num1 * direction.X;
point2DArray = new Point2D[1]
{
new Point2D(num3 / lengthSquared, num4 / lengthSquared) + center
};
}
else if (num2 > 0.0)
{
double num3 = direction.Y < 0.0 ? -1.0 : 1.0;
double num4 = num1 * direction.Y;
double num5 = -num1 * direction.X;
double num6 = System.Math.Sqrt(num2);
double num7 = num3 * direction.X * num6;
double num8 = System.Math.Abs(direction.Y) * num6;
point2DArray = new Point2D[2]
{
new Point2D((num4 + num7) / lengthSquared, (num5 + num8) / lengthSquared) + center,
new Point2D((num4 - num7) / lengthSquared, (num5 - num8) / lengthSquared) + center
};
}
return(point2DArray);
}
public static void GetIntersections(
Circle2D circle,
Arc2D arc,
double precision,
out Point2D[] intersections,
out bool overlap)
{
intersections = (Point2D[])null;
overlap = false;
Vector2D vector2D1 = arc.center - circle.Center;
double length = vector2D1.GetLength();
if (System.Math.Abs(length) <= precision)
{
if (!MathUtil.AreApproxEqual(circle.Radius, arc.radius, precision))
{
return;
}
overlap = true;
}
else
{
Vector2D vector2D2 = vector2D1 / length;
double num1 = length;
double num2 = num1 * num1;
double num3 = circle.Radius * circle.Radius;
double num4 = arc.radius * arc.radius;
double num5 = num2 - num4 + num3;
double d = (4.0 * num2 * num3 - num5 * num5) / (4.0 * num2);
if (d < -precision)
{
return;
}
double num6 = num5 / (2.0 * num1);
if (d <= precision)
{
Point2D point = circle.Center + num6 * vector2D2;
if (!arc.ContainsAngleProjection(point))
{
return;
}
intersections = new Point2D[1] {
point
};
}
else
{
double a = System.Math.Sqrt(d);
if (MathUtil.AreApproxEqual(a, 0.0, precision))
{
Point2D point = circle.Center + num6 * vector2D2;
if (!arc.ContainsAngleProjection(point))
{
return;
}
intersections = new Point2D[1] {
point
};
}
else
{
Vector2D vector2D3 = new Vector2D(vector2D2.Y, -vector2D2.X);
List <Point2D> point2DList = new List <Point2D>(2);
Point2D point1 = circle.Center + num6 * vector2D2 + a * vector2D3;
if (arc.ContainsAngleProjection(point1))
{
point2DList.Add(point1);
}
Point2D point2 = circle.Center + num6 * vector2D2 - a * vector2D3;
if (arc.ContainsAngleProjection(point2))
{
point2DList.Add(point2);
}
if (point2DList.Count <= 0)
{
return;
}
intersections = point2DList.ToArray();
}
}
}
}
public static Point2D[] GetIntersections(Circle2D circle, Line2D line)
{
return(Circle2D.GetIntersections(circle, line, 8.88178419700125E-16));
}
public Point2D[] GetIntersections(Line2D line, double precision)
{
return(Circle2D.GetIntersections(this, line, precision));
}
public Class201(Circle2D circle)
{
this.point2D_0 = circle.Center;
this.double_1 = circle.Radius;
}
public static void GetIntersections(
Circle2D circle1,
Circle2D circle2,
double precision,
out Point2D[] intersections,
out bool overlap)
{
intersections = (Point2D[])null;
overlap = false;
Vector2D vector2D1 = circle2.center - circle1.center;
double length = vector2D1.GetLength();
if (System.Math.Abs(length) <= precision)
{
if (!MathUtil.AreApproxEqual(circle1.radius, circle2.radius, precision))
{
return;
}
overlap = true;
}
else
{
Vector2D vector2D2 = vector2D1 / length;
double num1 = length;
double num2 = num1 * num1;
double num3 = circle1.radius * circle1.radius;
double num4 = circle2.radius * circle2.radius;
double num5 = num2 - num4 + num3;
double d = (4.0 * num2 * num3 - num5 * num5) / (4.0 * num2);
if (d < -precision)
{
return;
}
double num6 = num5 / (2.0 * num1);
if (d < 0.0)
{
Point2D point2D = circle1.center + num6 * vector2D2;
intersections = new Point2D[1] {
point2D
};
}
else
{
double a = System.Math.Sqrt(d);
if (MathUtil.AreApproxEqual(a, 0.0, precision))
{
Point2D point2D = circle1.center + num6 * vector2D2;
intersections = new Point2D[1] {
point2D
};
}
else
{
Vector2D vector2D3 = new Vector2D(vector2D2.Y, -vector2D2.X);
Point2D point2D1 = circle1.center + num6 * vector2D2 + a * vector2D3;
Point2D point2D2 = circle1.center + num6 * vector2D2 - a * vector2D3;
intersections = new Point2D[2]
{
point2D1,
point2D2
};
}
}
}
}
