private static double ClipTest(Vector spineVector, double beginRadius, double endRadius, Vector hitBegin, Vector hitEnd)
{
if (DoubleUtil.IsZero(spineVector.X) && DoubleUtil.IsZero(spineVector.Y))
{
Vector nearest = StrokeNodeOperations.GetNearest(hitBegin, hitEnd);
double num = (nearest.X == 0.0) ? Math.Abs(nearest.Y) : ((nearest.Y != 0.0) ? nearest.Length : Math.Abs(nearest.X));
return(StrokeNodeOperations.AdjustFIndex((num - beginRadius) / (endRadius - beginRadius)));
}
if (DoubleUtil.AreClose(hitBegin, hitEnd))
{
return(ClipTest(spineVector, beginRadius, endRadius, hitBegin));
}
Vector vector = hitEnd - hitBegin;
double num2;
if (DoubleUtil.IsZero(Vector.Determinant(spineVector, vector)))
{
num2 = ClipTest(spineVector, beginRadius, endRadius, StrokeNodeOperations.GetNearest(hitBegin, hitEnd));
}
else
{
double projectionFIndex = StrokeNodeOperations.GetProjectionFIndex(hitBegin, hitEnd);
Vector vector2 = hitBegin + vector * projectionFIndex;
if (vector2.LengthSquared < beginRadius * beginRadius)
{
num2 = ClipTest(spineVector, beginRadius, endRadius, (0.0 > projectionFIndex) ? hitBegin : hitEnd);
}
else
{
Vector vector3 = spineVector + StrokeNodeOperations.GetProjection(-spineVector, vector2 - spineVector);
if (DoubleUtil.IsZero(vector3.LengthSquared) || DoubleUtil.IsZero(endRadius - beginRadius + vector3.Length))
{
return(1.0);
}
num2 = (vector2.Length - beginRadius) / (endRadius - beginRadius + vector3.Length);
Vector vector4 = spineVector * num2;
double projectionFIndex2 = StrokeNodeOperations.GetProjectionFIndex(hitBegin - vector4, hitEnd - vector4);
if (!DoubleUtil.IsBetweenZeroAndOne(projectionFIndex2))
{
num2 = ClipTest(spineVector, beginRadius, endRadius, (0.0 > projectionFIndex2) ? hitBegin : hitEnd);
}
}
}
return(StrokeNodeOperations.AdjustFIndex(num2));
}
private static double ClipTest(Vector spine, double beginRadius, double endRadius, Vector hit)
{
double num = endRadius - beginRadius;
double num2 = spine.X * spine.X + spine.Y * spine.Y - num * num;
double num3 = -2.0 * (hit.X * spine.X + hit.Y * spine.Y + beginRadius * num);
double num4 = hit.X * hit.X + hit.Y * hit.Y - beginRadius * beginRadius;
if (DoubleUtil.IsZero(num2) || !DoubleUtil.GreaterThanOrClose(num3 * num3, 4.0 * num2 * num4))
{
return(1.0);
}
double num5 = Math.Sqrt(num3 * num3 - 4.0 * num2 * num4);
double num6 = (0.0 - num3 + num5) / (2.0 * num2);
double num7 = (0.0 - num3 - num5) / (2.0 * num2);
double findex = (DoubleUtil.IsBetweenZeroAndOne(num6) && DoubleUtil.IsBetweenZeroAndOne(num6)) ? Math.Min(num6, num7) : (DoubleUtil.IsBetweenZeroAndOne(num6) ? num6 : (DoubleUtil.IsBetweenZeroAndOne(num7) ? num7 : ((num6 > 1.0 && num7 > 1.0) ? 1.0 : ((!(num6 < 0.0) || !(num7 < 0.0)) ? ((Math.Abs(Math.Min(num6, num7) - 0.0) < Math.Abs(Math.Max(num6, num7) - 1.0)) ? 0.0 : 1.0) : 0.0))));
return(StrokeNodeOperations.AdjustFIndex(findex));
}