public void AffineTransformTest()
{
var c = new double[6];
c[0] = -179.75; // x-coordinate of the *center* of the top-left cell
c[1] = 0.5; // column width
c[2] = 0.0; // rotation/skew term
c[3] = 89.75; // y-coordinate of the *center* of the top-left cell
c[4] = 0.0; // rotation/skew term
c[5] = -0.5; // negative row height
var at = new AffineTransform(c);
var rand = new Random();
for (int row = 0; row < 9; row++)
{
for (int col = 0; col < 9; col++)
{
Coordinate corner = at.CellTopLeft_ToProj(row, col);
double frac_col = rand.NextDouble();
double frac_row = rand.NextDouble();
double dX = c[1] * frac_col + c[2] * frac_row;
double dY = c[4] * frac_col + c[5] * frac_row;
Coordinate point = new Coordinate(corner.X + dX, corner.Y + dY);
Assert.AreEqual(at.ProjToCell(point), new RcIndex(row, col));
}
}
}