/// <summary>
/// Get the point on the arc closest to the specified angle, described
/// as a parameter value from 0-1. This may be a point on the arc (if the
/// angle lies within the necessary range) or it may be the start or end
/// of the arc if the angle lies outside that range.
/// </summary>
/// <param name="angle">The angle on the arc's circle</param>
/// <returns></returns>
public double ClosestArcParameter(Angle angle)
{
Angle toStart = Circle.Azimuth(Vertices.First().Position);
Angle radMeasure = RadianMeasure;
Angle toPointFromStart = (angle - toStart).ToSign(radMeasure.Sign());
if (toPointFromStart.Abs() <= radMeasure.Abs())
{
return(toPointFromStart / radMeasure);
}
else if (toPointFromStart.Abs() < radMeasure.Abs() + radMeasure.Explement().Abs() / 2)
{
return(1); // Closest to end
}
else
{
return(0); // Closest to start
}
}
/// <summary>
/// Is the specified point within the specified subset of the
/// angle range of this arc's sector?
/// </summary>
/// <param name="point"></param>
/// <param name="arcBounds">The </param>
/// <returns></returns>
public bool IsInAngleRange(Vector point, Interval arcBounds)
{
Angle angle = Circle.Azimuth(point);
Angle toStart = Circle.Azimuth(PointAt(arcBounds.Start));
Angle radMeasure = RadianMeasure * arcBounds.Size;
Angle toPointFromStart = (angle - toStart).ToSign(radMeasure.Sign());
if (toPointFromStart.Abs() <= radMeasure.Abs())
{
return(true);
}
else
{
return(false);
}
}
/// <summary>
/// Is the specified point within the angle range of this arc's sector?
/// </summary>
/// <param name="point"></param>
/// <returns></returns>
public bool IsInAngleRange(Vector point)
{
Angle angle = Circle.Azimuth(point);
Angle toStart = Circle.Azimuth(Vertices.First().Position);
Angle radMeasure = RadianMeasure;
Angle toPointFromStart = (angle - toStart).ToSign(radMeasure.Sign());
if (toPointFromStart.Abs() <= radMeasure.Abs())
{
return(true);
}
else
{
return(false);
}
}
