/// <summary>
/// Create a scale transform that scales around a given scale center (pivot point)
/// </summary>
/// <param name="pivot">pivot point</param>
/// <param name="scaleX">The scale factor in x-direction.</param>
/// <param name="scaleY">The scale factor in y-direction.</param>
/// <returns>A <see cref="Transformation2D"/> that scales around a given pivot point.</returns>
public static Transformation2D CreateScaleAround(Vector2 pivot, float scaleX, float scaleY)
{
var t = new Transformation2D();
t.TranslateGlobal(-pivot);
t.ScaleGlobal(scaleX, scaleY);
t.TranslateGlobal(pivot);
return(t);
}
/// <summary>
/// Creates a rotation transform that rotates around a given rotation center (pivot point)
/// </summary>
/// <param name="pivot">pivot point</param>
/// <param name="degrees">rotation in degrees</param>
/// <returns>A <see cref="Transformation2D"/> that rotates around a given pivot point.</returns>
public static Transformation2D CreateRotationAround(Vector2 pivot, float degrees)
{
var t = new Transformation2D();
t.TranslateGlobal(-pivot);
t.RotateGlobal(degrees);
t.TranslateGlobal(pivot);
return(t);
}