public LineSegment3D Project(LineSegment3D line3DToProject)
{
var projectedStartPoint = this.Project(line3DToProject.StartPoint);
var projectedEndPoint = this.Project(line3DToProject.EndPoint);
return(new LineSegment3D(projectedStartPoint, projectedEndPoint));
}
/// <summary>
/// Returns the closest point on the polyline to the given point.
/// </summary>
/// <param name="p">A point</param>
/// <returns>A point which is the closest to the given point but still on the line.</returns>
public Point3D ClosestPointTo(Point3D p)
{
var minError = double.MaxValue;
var closest = default(Point3D);
for (var i = 0; i < this.VertexCount - 1; i++)
{
var segment = new LineSegment3D(this.points[i], this.points[i + 1]);
var projected = segment.ClosestPointTo(p);
var error = p.DistanceTo(projected);
if (error < minError)
{
minError = error;
closest = projected;
}
}
return(closest);
}
/// <summary>
/// Transforms a line segment.
/// </summary>
/// <param name="l">A line segment</param>
/// <returns>The transformed line segment</returns>
public LineSegment3D Transform(LineSegment3D l)
{
return(new LineSegment3D(this.Transform(l.StartPoint), this.Transform(l.EndPoint)));
}