public IEnumerable <XElement> GetSvgPaths()
{
Kurve.Curves.Curve curve = optimizer.GetCurve(specification);
IEnumerable <string> curveCommands = Enumerables.Concatenate
(
Enumerables.Create(Svg.MoveTo(curve.GetPoint(0))),
from positions in Scalars.GetIntermediateValuesSymmetric(0, 1, SegmentCount + 1).GetRanges()
let controlPoint1 = curve.GetPoint(positions.Item1) + (1.0 / (3 * SegmentCount)) * curve.GetVelocity(positions.Item1)
let controlPoint2 = curve.GetPoint(positions.Item2) - (1.0 / (3 * SegmentCount)) * curve.GetVelocity(positions.Item2)
let point2 = curve.GetPoint(positions.Item2)
select Svg.CurveTo(controlPoint1, controlPoint2, point2)
);
yield return(Svg.PathShape(curveCommands, null, Colors.Black, 2));
IEnumerable <string> curvatureMarkersCommands =
(
from positions in Scalars.GetIntermediateValuesSymmetric(0, 1, SegmentCount + 1).GetRanges()
let position = Enumerables.Average(positions.Item1, positions.Item2)
let curvatureVector = CurvatureMarkersFactor * curve.GetCurvature(position) * curve.GetNormalVector(position)
select Svg.Line(curve.GetPoint(position), curve.GetPoint(position) + curvatureVector)
);
yield return(Svg.PathShape(curvatureMarkersCommands, null, Colors.Blue, 0.5));
foreach (PointCurveSpecification pointCurveSpecification in specification.BasicSpecification.CurveSpecifications.OfType <PointCurveSpecification>())
{
Vector2Double point = curve.GetPoint(pointCurveSpecification.Position);
yield return(Svg.CircleShape(point, 10, Colors.Red, null, 0));
}
foreach (DirectionCurveSpecification directionCurveSpecification in specification.BasicSpecification.CurveSpecifications.OfType <DirectionCurveSpecification>())
{
Vector2Double directionVector = curve.GetDirectionVector(directionCurveSpecification.Position);
Vector2Double start = curve.GetPoint(directionCurveSpecification.Position) - 1000 * directionVector;
Vector2Double end = curve.GetPoint(directionCurveSpecification.Position) + 1000 * directionVector;
yield return(Svg.LineShape(start, end, null, Colors.Green, 2));
}
foreach (CurvatureCurveSpecification curvatureCurveSpecification in specification.BasicSpecification.CurveSpecifications.OfType <CurvatureCurveSpecification>())
{
if (curvatureCurveSpecification.Curvature == 0)
{
Vector2Double directionVector = curve.GetDirectionVector(curvatureCurveSpecification.Position);
Vector2Double start = curve.GetPoint(curvatureCurveSpecification.Position) - 1000 * directionVector;
Vector2Double end = curve.GetPoint(curvatureCurveSpecification.Position) + 1000 * directionVector;
yield return(Svg.LineShape(start, end, null, Colors.Blue, 2));
}
else
{
Vector2Double center = curve.GetPoint(curvatureCurveSpecification.Position) - (1.0 / curvatureCurveSpecification.Curvature) * curve.GetNormalVector(curvatureCurveSpecification.Position);
double radius = 1.0 / curvatureCurveSpecification.Curvature.Absolute();
yield return(Svg.CircleShape(center, radius, null, Colors.Blue, 2));
}
}
}