public static TrnsData ToTrnsData
(this AffinePos srcPos, int w, int h)
{
//inner w h
var innerh = PosL2(srcPos.LB, srcPos.LT);
var innerw = PosL2(srcPos.RT, srcPos.LT);
var trgPos = srcPos.MoveToCenter(new PointD(w / 2.0, h / 2.0)); // ok
var fcenterX = srcPos.GetCenter().X;
var fcenterY = srcPos.GetCenter().Y;
var lcenterX = trgPos.GetCenter().X;
var lcenterY = trgPos.GetCenter().Y;
var xshift = lcenterX - fcenterX;
var yshift = lcenterY - fcenterY;
var dx = srcPos.LT.X - srcPos.RT.X;
var dy = srcPos.LT.Y - srcPos.RT.Y;
if (dx == 0)
{
return(default(TrnsData));
}
//var angle_degree = 360 - Math.Atan2(dy, dx) * 180 / Math.PI;
//double radian;
//angle_degree %= 360;
//radian = PI / 180.0 * angle_degree;
var radian = Math.Atan(dy / dx);
var radian2 = Math.Atan2(dy, dx);
return(new TrnsData()
{
H = h,
W = w,
XShift = (int)xshift,
YShift = (int)yshift,
Innerw = innerw,
Innterh = innerh,
XSrcCnter = (int)fcenterX,
YSrcCnter = (int)fcenterY,
dX = (int)dx,
dY = (int)dy,
Angle = radian,
});
}
public static int[,] xytransform(int[,] src, AffinePos srcPos, AffinePos trgPos)
{
var h = src.GetLength(0);
var w = src.GetLength(1);
var fcenterX = srcPos.GetCenter().X;
var fcenterY = srcPos.GetCenter().Y;
var lcenterX = trgPos.GetCenter().X;
var lcenterY = trgPos.GetCenter().Y;
var xshift = (int)(lcenterX - fcenterX);
var yshift = (int)(lcenterY - fcenterY);
int[,] R = new int[h + Abs(yshift), w + Abs(xshift)];
for (int j = 0; j < h; j++)
{
for (int i = 0; i < w; i++)
{
if (i - xshift >= 0 &&
j - yshift >= 0 &&
i - xshift < R.GetLength(1) &&
j - yshift < R.GetLength(0))
{
R[j - yshift, i - xshift] = src[j, i];
}
}
}
// now R is shifted
/*
* var dx = Abs(srcPos.LT.X - srcPos.RT.X);
* var dy = Abs(srcPos.LT.Y - srcPos.RT.Y);
* if (dx == 0) return null;
* var angle_degree = 360 - Math.Atan2(dy, dx)*180/Math.PI;
* var rotationResult = rotateGeneral(R, R.GetLength(1), R.GetLength(0), angle_degree);
*
* return rotationResult;
*/
return(R);
}
