static void TestLengths(double del, int j, Curve curve, double eps, double pi, double li) {
var lj = del*j;
var pj = curve.GetParameterAtLength(lj);
Assert.IsTrue(Math.Abs(curve.Trim(0, pj).Length - lj) < eps);
var trimJi = curve.Trim(pj, pi);
var lenJi = trimJi.Length;
Assert.IsTrue(Math.Abs(lenJi - (li - lj)) < eps);
}
/// <summary>
///
/// </summary>
/// <param name="length"></param>
/// <returns></returns>
public double GetParameterAtLength(double length)
{
return(curve.GetParameterAtLength(length));
}
public void LengthTestingForCurve() {
#if GDI_DEBUG_VIEWER
GraphViewerGdi.DisplayGeometryGraph.SetShowFunctions();
#endif
var curve = new Curve(Getsegs());
var lengths = new List<double>();
foreach (var seg in curve.Segments) {
lengths.Add(seg.Length);
}
var curveLen = curve.Length;
double eps = Curve.LineSegmentThreshold*10;
Assert.IsTrue(ApproximateComparer.Close(lengths.Sum(), curveLen));
var del = curveLen/1000;
//special case
for (int i = 745; i < 746; i++) {
var li = i*del;
var pi = curve.GetParameterAtLength(li);
Assert.IsTrue(Math.Abs(curve.Trim(0, pi).Length - li) < eps);
for (int j = 724; j < 725; j++)
TestLengths(del, j, curve, eps, pi, li);
}
for (int i = 0; i < 1000; i++) {
var li = i*del;
var pi = curve.GetParameterAtLength(li);
Assert.IsTrue(Math.Abs(curve.Trim(0, pi).Length - li) < eps);
for (int j = 0; j < i; j++)
TestLengths(del, j, curve, eps, pi, li);
}
}
