/// <summary>
/// Generate a transform that transforms points in a space.
/// </summary>
/// <param name="fromPoints">
/// The "from" points.
/// </param>
/// <param name="toPixels">
/// The "to" points.
/// </param>
/// <returns>
/// The 3x3 matrix that represents a transform from the points to the pixels.
/// </returns>
public static Matrix33 ComputeTransform(IList <Point> fromPoints, IList <Point> toPixels)
{
if (toPixels == null || fromPoints == null)
{
return(null);
}
var pixelMatrix = new Matrix33(toPixels);
var pointMatrix = new Matrix33(fromPoints);
return(pointMatrix.Inverse().Product(pixelMatrix));
}
/// <summary>
/// Generate a transform that transforms points in pc space to locations in map space.
/// </summary>
/// <param name="fromPoints">
/// The "from" points, typically values from a ResourceDictionary entry.
/// </param>
/// <param name="toAnchors">
/// The "to" anchors, typically map locations.
/// </param>
/// <returns>
/// The 3x3 matrix that represents a transform from the points to the anchors.
/// </returns>
public static Matrix33 ComputeTransform(IList <Point> fromPoints, IList <ILocation> toAnchors)
{
if (toAnchors == null || fromPoints == null)
{
return(null);
}
var anchorMatrix = new Matrix33(toAnchors);
var pointMatrix = new Matrix33(fromPoints);
return(pointMatrix.Inverse().Product(anchorMatrix));
}
