/// <summary>
/// Gets the linear 3d segment of the polyline 2d at specified index.
/// </summary>
/// <param name="pl">The instance to which the method applies.</param>
/// <param name="index">The segment index.</param>
/// <returns>A copy of the segment (WCS coordinates).</returns>
/// <exception cref="ArgumentOutOfRangeException">
/// ArgumentOutOfRangeException is thrown the index is out of range.</exception>
public static LineSegment3d GetLineSegmentAt(this Polyline2d pl, int index)
{
try
{
return(new LineSegment3d(
pl.GetPointAtParameter(index),
pl.GetPointAtParameter(index + 1)));
}
catch
{
throw new ArgumentOutOfRangeException("Out of range index");
}
}
/// <summary>
/// Gets the arc 3d segment of the polyline 2d at specified index.
/// </summary>
/// <param name="pl">The instance to which the method applies.</param>
/// <param name="index">The segment index.</param>
/// <returns>A copy of the segment (WCS coordinates).</returns>
/// <exception cref="ArgumentOutOfRangeException">
/// ArgumentOutOfRangeException is thrown the index is out of range.</exception>
public static CircularArc3d GetArcSegmentAt(this Polyline2d pl, int index)
{
try
{
return(new CircularArc3d(
pl.GetPointAtParameter(index),
pl.GetPointAtParameter(index + 0.5),
pl.GetPointAtParameter(index + 1)));
}
catch
{
throw new ArgumentOutOfRangeException("index");
}
}
/// <summary>
/// Gets the linear 2d segment of the polyline 2d at specified index.
/// </summary>
/// <param name="pl">The instance to which the method applies.</param>
/// <param name="index">The segment index.</param>
/// <returns>A copy of the segment (OCS coordinates).</returns>
/// <exception cref="ArgumentOutOfRangeException">
/// ArgumentOutOfRangeException is thrown the index is out of range.</exception>
public static LineSegment2d GetLineSegment2dAt(this Polyline2d pl, int index)
{
try
{
Matrix3d WCS2ECS = pl.Ecs.Inverse();
return(new LineSegment2d(
pl.GetPointAtParameter(index).TransformBy(WCS2ECS).Convert2d(),
pl.GetPointAtParameter(index + 1.0).TransformBy(WCS2ECS).Convert2d()));
}
catch
{
throw new ArgumentOutOfRangeException("Out of range index");
}
}
/// <summary>
/// Gets the arc 2d segment of the polyline 2d at specified index.
/// </summary>
/// <param name="pl">The instance to which the method applies.</param>
/// <param name="index">The segment index.</param>
/// <returns>A copy of the segment (OCS coordinates).</returns>
/// <exception cref="ArgumentOutOfRangeException">
/// ArgumentOutOfRangeException is thrown the index is out of range.
/// </exception>
public static CircularArc2d GetArcSegment2DAt(this Polyline2d pl, int index)
{
try
{
var wcs2Ecs = pl.Ecs.Inverse();
return(new CircularArc2d(
pl.GetPointAtParameter(index).TransformBy(wcs2Ecs).Convert2D(),
pl.GetPointAtParameter(index + 0.5).TransformBy(wcs2Ecs).Convert2D(),
pl.GetPointAtParameter(index + 1.0).TransformBy(wcs2Ecs).Convert2D()));
}
catch
{
throw new ArgumentOutOfRangeException("index");
}
}
public static CircularArc2d GetArcSegment2dAt([NotNull] this Polyline2d pl, int index)
{
try
{
var WCS2ECS = pl.Ecs.Inverse();
return(new CircularArc2d(
pl.GetPointAtParameter(index).TransformBy(WCS2ECS).Convert2d(),
pl.GetPointAtParameter(index + 0.5).TransformBy(WCS2ECS).Convert2d(),
pl.GetPointAtParameter(index + 1.0).TransformBy(WCS2ECS).Convert2d()));
}
catch
{
throw new ArgumentOutOfRangeException(nameof(index));
}
}