/// <summary>
/// Calculates composition of two transformations, i.e. new transformation C(x) = A(B(x))
/// </summary>
/// <param name="trA"></param>
/// <param name="trB"></param>
/// <returns></returns>
public static IsometricTransform Compose(IsometricTransform trA, IsometricTransform trB)
{
var newAngle = Angles.NormalizeRad(trA.AngleRadians + trB.AngleRadians);
var newPreShift = new Point(trB.preShiftX, trB.preShiftY);
var newPostShift = trA.Transform(new Point(trB.postShiftX, trB.postShiftY));
return(new IsometricTransform(newAngle, newPostShift, newPreShift));
}
public static IsometricTransform DetectTransform(Func <Point, Point> transform)
{
var pntZeroImage = transform(new Point(0, 0));
var pntTestImage = transform(new Point(1000, 1000));
var cosPlusSin = (pntTestImage.x - pntZeroImage.x) / 1000;
var cosMinusSin = (pntTestImage.y - pntZeroImage.y) / 1000;
var cosAngle = (cosPlusSin + cosMinusSin) / 2;
var sinAngle = (cosPlusSin - cosMinusSin) / 2;
var angle = Angles.DecodeAngle(cosAngle, sinAngle);
return(new IsometricTransform(angle, pntZeroImage));
}
public override string ToString()
{
return(string.Format("Pre: ({0:N2}, {1:N2}), Angle: {2:N2}, Post: ({3:N2}, {4:N2})", preShiftX, preShiftY, Angles.RadToDeg(angleRadians), postShiftX, postShiftY));
}
