/// <summary>
/// Normalizes point cloud to range [-1..1]. Ratios will be preserved.
/// <para>A bounding rectangle will be determined and then </para>
/// <para> 1) points will be translated for (rect center X, rect center Y)</para>
/// <para> 2) and then rescaled for (1/scale, 1/scale) where scale is max(width, height).</para>
/// </summary>
/// <param name="points">Points to normalize.</param>
/// <returns>Normalized points.</returns>
public static IEnumerable <PointF> Normalize(this IEnumerable <PointF> points)
{
var rect = points.BoundingRect();
var center = rect.Center();
var scaleFactor = System.Math.Max(rect.Width, rect.Height);
var transform = Transforms2D.Combine
(
Transforms2D.Translation(-center.X, -center.Y),
Transforms2D.Scale(1 / scaleFactor, 1 / scaleFactor)
);
points = points.Transform(transform);
return(points);
}
/// <summary>
/// Rotates the point by specified angle in radians.
/// </summary>
/// <param name="p">Point.</param>
/// <param name="angleRad">Angle in radians.</param>
/// <returns>Rotated point.</returns>
public static PointF Rotate(this PointF p, float angleRad)
{
return(p.Transform(Transforms2D.Rotation(angleRad)));
}