private static void AppendElementAtXY(TData[][] matrix, MatrixWrap wrap, StringBuilder sb, int y, int x)
{
TData element;
int ytarget = GetYTarget(matrix, wrap, y);
int xtarget = GetXTarget(matrix, wrap, x, ytarget);
element = matrix[ytarget][xtarget];
sb.Append(element.ToString());
}
private static int GetYTarget(TData[][] matrix, MatrixWrap wrap, int y)
{
int ytarget;
if (wrap.HasFlag(MatrixWrap.WrapVertically))
{
ytarget = (y + matrix.Length) % matrix.Length;
}
else
{
ytarget = Math.Min(y, matrix.Length);
}
return(ytarget);
}
private static int GetXTarget(TData[][] matrix, MatrixWrap wrap, int x, int ytarget)
{
int xtarget;
if (wrap.HasFlag(MatrixWrap.WrapHorizontally))
{
xtarget = (x + matrix[ytarget].Length) % matrix[ytarget].Length;
}
else
{
xtarget = Math.Min(x, matrix[ytarget].Length);
}
return(xtarget);
}
public static string GetDisplayRectangle(TData[][] matrix, Rectangle rect, MatrixWrap wrap)
{
StringBuilder sb = new StringBuilder();
for (int y = rect.Y; y < rect.Y + rect.Height; y++)
{
for (int x = rect.X; x < rect.X + rect.Width; x++)
{
if (x < 0 && !wrap.HasFlag(MatrixWrap.WrapHorizontally) ||
y < 0 && !wrap.HasFlag(MatrixWrap.WrapVertically))
{
sb.Append(' ');
}
else
{
AppendElementAtXY(matrix, wrap, sb, y, x);
}
}
sb.AppendLine();
}
return(sb.ToString());
}
