public Vector GetNormal(PolylineData polyline, double cornerRadius = 0.0)
{
return(polyline.SmoothNormal(Index, Ratio, cornerRadius));
}
public static void PathMarch(PolylineData polyline, double startArcLength, double cornerThreshold,
Func <MarchLocation, double> stopCallback)
{
if (polyline == null)
{
throw new ArgumentNullException(nameof(polyline));
}
var count = polyline.Count;
if (count <= 1)
{
throw new ArgumentOutOfRangeException(nameof(polyline));
}
var flag = false;
var x = startArcLength;
var before = 0.0;
var index = 0;
var num5 = Math.Cos(cornerThreshold * 3.1415926535897931 / 180.0);
while (true)
{
var num6 = polyline.Lengths[index];
if (!MathHelper.IsFiniteDouble(x))
{
return;
}
if (MathHelper.IsVerySmall(x))
{
x = stopCallback(MarchLocation.Create(MarchStopReason.CompleteStep, index, before,
num6 - before, x));
flag = true;
}
else if (MathHelper.GreaterThan(x, 0.0))
{
if (MathHelper.LessThanOrClose(x + before, num6))
{
before += x;
x = stopCallback(MarchLocation.Create(MarchStopReason.CompleteStep, index, before,
num6 - before, 0.0));
flag = true;
}
else if (index < count - 2)
{
index++;
var num7 = num6 - before;
x -= num7;
before = 0.0;
// ReSharper disable once CompareOfFloatsByEqualityOperator
if (flag && num5 != 1.0 && polyline.Angles[index] > num5)
{
num6 = polyline.Lengths[index];
x = stopCallback(MarchLocation.Create(MarchStopReason.CornerPoint, index, before,
num6 - before, x));
}
}
else
{
var num8 = num6 - before;
x -= num8;
num6 = polyline.Lengths[index];
before = polyline.Lengths[index];
x = stopCallback(MarchLocation.Create(MarchStopReason.CompletePolyline, index, before,
num6 - before, x));
flag = true;
}
}
else if (MathHelper.LessThan(x, 0.0))
{
if (MathHelper.GreaterThanOrClose(x + before, 0.0))
{
before += x;
x = stopCallback(MarchLocation.Create(MarchStopReason.CompleteStep, index, before,
num6 - before, 0.0));
flag = true;
}
else if (index > 0)
{
index--;
x += before;
before = polyline.Lengths[index];
// ReSharper disable once CompareOfFloatsByEqualityOperator
if (flag && num5 != 1.0 && polyline.Angles[index + 1] > num5)
{
num6 = polyline.Lengths[index];
x = stopCallback(MarchLocation.Create(MarchStopReason.CornerPoint, index, before,
num6 - before, x));
}
}
else
{
x += before;
num6 = polyline.Lengths[index];
before = 0.0;
x = stopCallback(MarchLocation.Create(MarchStopReason.CompletePolyline, index, before,
num6 - before, x));
flag = true;
}
}
}
}
