public override void PrerenderUpdate()
{
var bezier = Shape as BezierCurveC2;
if (bezier == null)
{
return;
}
bezier.ControlPoints = Objects.Select(t => t.Reference.Position).ToList();
if (bezier.ControlPoints.Count > 3)
{
var bernstein = BSplineToBernsteinConverter.ConvertAssumingEquidistantKnots(bezier.ControlPoints);
if (_virtualPoints.Count == bernstein.Count)
{
for (var i = 0; i < _virtualPoints.Count; ++i)
{
_virtualPoints[i].Position = bernstein[i];
}
}
else
{
_virtualPoints =
bernstein.Select(t => new BSplineBernsteinVirtualPoint(this)
{
Position = t
}).ToList();
}
}
else
{
_virtualPoints.Clear();
}
}
public void UpdateGeometry(Func <Point3D, Point3D, double> estimateScreenDistanceWithoutClip,
Predicate <Point3D> isInsideProjectiveCubePredicate)
{
IList <Point3D> chosenControlPoints;
var controlPointsColor = Colors.White;
IList <Vertex> rawPointsList = new List <Vertex>();
switch (Basis)
{
case CurveBasis.Bernstein:
chosenControlPoints = BSplineToBernsteinConverter.ConvertAssumingEquidistantKnots(
ControlPoints
);
rawPointsList = BezierCurveC0.SampleBezierCurveC0(
chosenControlPoints,
estimateScreenDistanceWithoutClip,
3
);
controlPointsColor = Colors.Red;
break;
case CurveBasis.BSpline:
chosenControlPoints = ControlPoints;
rawPointsList = SampleBSplineCurve(ControlPoints, CustomKnots, ApplyParameterCorrection, estimateScreenDistanceWithoutClip);
break;
default:
throw new ArgumentOutOfRangeException();
}
RawPoints = new List <Vertex>();
Vertices = new List <Vertex>();
MarkerPoints = new List <Vertex>();
Lines = new List <IndexedLine>();
if (rawPointsList.Count > 0)
{
Vertices = rawPointsList;
Lines = Enumerable.Range(0, rawPointsList.Count - 1).Select(t => new IndexedLine(t, t + 1)).ToList();
}
if (IsPolygonRenderingEnabled && ControlPoints.Count >= 2)
{
var additionalVertices = ControlPoints.Select(t => new Vertex(t, Colors.Gray)).ToList();
var additionalLines = Enumerable.Range(Vertices.Count, ControlPoints.Count - 1).Select(t => new IndexedLine(t, t + 1)).ToList();
Vertices = Vertices.Concat(additionalVertices).ToList();
Lines = Lines.Concat(additionalLines).ToList();
}
if (!ReferenceEquals(chosenControlPoints, ControlPoints))
{
MarkerPoints = chosenControlPoints.Select(t => new Vertex(t, controlPointsColor)).ToList();
}
// display bernstein points
/*
* MarkerPoints = new List<Vertex>();
* if (ControlPoints.Count > 3)
* {
* var bernsteinVertices =
* BSplineToBernsteinConverter.ConvertAssumingEquidistantKnots(ControlPoints);
* MarkerPoints = bernsteinVertices
* }
*/
// ***
}