public static Bitmap Transformation(this Bitmap bitmap, Bitmap reference, double[,] mat)
{
/*
* int offsetX = (int) mat[2, 0];
* int offsetY = (int) mat[2, 1];
* double scaleX = Math.Sqrt(Math.Pow(mat[0, 0], 2) + Math.Pow(mat[0, 1], 2));
* double scaleY = Math.Sqrt(Math.Pow(mat[1, 0], 2) + Math.Pow(mat[1, 1], 2));
* double theta = Math.Atan(mat[0, 1] / mat[0, 0]);
*
* int width = (int) Math.Ceiling((bitmap.Width - offsetX) / Math.Cos(theta) / scaleX);
* int height = (int) Math.Ceiling(offsetX / Math.Sin(theta) / scaleY);
*/
Bitmap change = new Bitmap(reference.Width, reference.Height);
CustomMatrix customMatrix = new CustomMatrix();
for (int i = 0; i < change.Width; i++)
{
for (int j = 0; j < change.Height; j++)
{
double[,] coordinate = new double[1, 3]
{
{ i, j, 1 }
};
coordinate = customMatrix.MatrixMultiply(coordinate, mat);
int x = (int)Math.Round(coordinate[0, 0]);
int y = (int)Math.Round(coordinate[0, 1]);
if (x >= 0 && x < bitmap.Width && y >= 0 && y < bitmap.Height)
{
Color color = bitmap.GetPixel(x, y);
change.SetPixel(i, j, color);
}
}
}
return(change);
}
public void TestMethodMultiply()
{
var arr1 = new int[1, 3]
{
{ 1, 2, 3 },
};
var arr2 = new int[3, 3]
{
{ 1, 2, 3 },
{ 1, 2, 3 },
{ 1, 2, 3 }
};
var ret = matrix.MatrixMultiply <int>(arr1, arr2);
var result = new Int32[1, 3]
{
{ 6, 12, 18 },
};
Assert.AreEqual(result, ret, "Multiply Error");
}