private BezierSubdivision TangentIntersectionApproximation(Neuron neuron, out double length)
{
var firstPoint = neuron.Nucleus.Pos;
var lastPoint = neuron.Terminal.Nucleus.Pos;
var dir = Math.Sign(neuron.Terminal.Nucleus.SegmentIndex - neuron.Nucleus.SegmentIndex);
var line1 = Line2.FromPoints(neuron.Nucleus.PathPoint, _path[neuron.Nucleus.SegmentIndex + dir]);
var line2 = Line2.FromPoints(neuron.Terminal.Nucleus.PathPoint, _path[neuron.Terminal.Nucleus.SegmentIndex - dir]);
BezierSubdivision bs;
if (Line2.Intersection(line1, line2, out var intersection))
{
bs = new BezierSubdivision(new List <Vector2> {
firstPoint, intersection, lastPoint
});
length = bs.SubdividedApproximationLength();
}
else
{
bs = new BezierSubdivision(new List <Vector2> {
firstPoint, lastPoint
});
length = Vector2.Distance(firstPoint, lastPoint);
}
return(bs);
}
public void Test4()
{
List <Vector2> points = new List <Vector2> {
new Vector2(0, 0), new Vector2(100, 100), new Vector2(200, 0)
};
BezierSubdivision subdivision = new BezierSubdivision(points);
var length = new SliderPath(PathType.Bezier, points.ToArray()).Distance;
var length2 = subdivision.SubdividedApproximationLength(0.25);
Assert.AreEqual(length, length2, 0.001);
Assert.AreEqual(0.5, subdivision.LengthToT(length / 2), 0.01);
Assert.AreEqual(1, subdivision.LengthToT(length), 0.01);
Assert.AreEqual(0, subdivision.LengthToT(0), 0.01);
}
private static BezierSubdivision DoubleMiddleApproximation(Neuron neuron, Vector2 middlePoint, out double length)
{
var firstPoint = neuron.Nucleus.Pos;
var lastPoint = neuron.Terminal.Nucleus.Pos;
var average = (firstPoint + lastPoint) / 2;
var doubleMiddlePoint = average + (middlePoint - average) * 2;
var bs = new BezierSubdivision(new List <Vector2> {
firstPoint, doubleMiddlePoint, lastPoint
});
length = bs.SubdividedApproximationLength();
return(bs);
}