public static ICurve CreateTrimmedCurve(this ICurve curve, double t0, double t1)
{
var p0 = curve.Evaluate2(t0, 0).CastArray <double>();
var p1 = curve.Evaluate2(t1, 0).CastArray <double>();
return((ICurve)curve.CreateTrimmedCurve(p0[0], p0[1], p0[2], p1[0], p1[1], p1[2]));
}
public static Vector3[] GetTessPoints(this ICurve curve, double chordTol, double lengthTol, RangeDouble?domain = null)
{
bool isPeriodic;
double end;
bool isClosed;
double start;
if (domain == null)
{
curve.GetEndParams(out start, out end, out isClosed, out isPeriodic);
}
else
{
start = domain.Value.Min;
end = domain.Value.Max;
}
var startPt = (double[])curve.Evaluate2(start, 0);
var midPt = (double[])curve.Evaluate2((start + end) / 2, 0);
var endPt = (double[])curve.Evaluate2(end, 0);
var set0 = GetTessPotsAsVector3(curve, chordTol, lengthTol, startPt, midPt)
.ToArray();
var set1 = GetTessPotsAsVector3(curve, chordTol, lengthTol, midPt, endPt)
.ToArray();
return(set0.Concat(set1.Skip(1)).ToArray());
}
public static double[] CurveBoundsDoubleArray(this ICurve curve)
{
var start = curve.Evaluate2(curve.Domain().Min(), 0).CastArray <double>().Take(3);
var end = curve.Evaluate2(curve.Domain().Max(), 0).CastArray <double>().Take(3);
return(start.Concat(end).ToArray());
}
/// <summary>
/// Return the point at parameter value t on the curve.
/// </summary>
/// <param name="curve"></param>
/// <param name="t"></param>
/// <param name="derivatives"></param>
/// <returns></returns>
public static List <Vector3> PointAt(this ICurve curve, double t, int derivatives)
{
var ret = ((double[])curve.Evaluate2(t, derivatives))
.Buffer(3, 3)
.Take(derivatives + 1)
.Select(p => p.ToVector3())
.ToList();
return(ret);
}