public Point2d?Perspective(RelativePoint point)
{
if (!GeometryHelpers.IsInside(point, BL, TL, TR, BR))
{
return(null);
}
double px = p[0].X;
double py = p[0].Y;
double xp = point.Norm.X;
double yp = point.Norm.Y;
double detD = ((a + g * px - g * xp) * (e + h * py - h * yp)) - ((d + g * py - g * yp) * (b + h * px - h * xp));
double detDx = ((xp - px) * (e + h * py - h * yp)) - ((yp - py) * (b + h * px - h * xp));
double detDy = ((a + g * px - g * xp) * (yp - py)) - ((d + g * py - g * yp) * (xp - px));
double x = detDx / detD;
double y = detDy / detD;
double normX = x * TopBottomDistance;
double normY = y * LeftRightDistance;
return(new Point2d(normX, normY));
}
