private Point[] FindPoints(Image <Gray, byte> maskImage, Rectangle calcRectangle, SearchOrientations orientation)
{
_logger?.Trace($"FindPoints started. orientation: {orientation}");
byte[,,] maskData = maskImage.Data;
Point[] result = null;
MyCalculationRectangle rect = DetermineMyRectangle(calcRectangle, orientation);
try
{
switch (orientation)
{
case SearchOrientations.TopToBottom:
case SearchOrientations.BottomToTop:
result = new Point[calcRectangle.Width];
for (int i = rect.StartX; i < rect.StopX; i += rect.StepX)
{
for (int j = 0; j < Math.Abs(rect.StopY - rect.StartY); j++)
{
if (maskData[rect.StartY + j * rect.StepY, i, 0] <= 0)
{
continue;
}
result[i - rect.StartX] = new Point(j, i);
break;
}
}
break;
case SearchOrientations.LeftToRight:
case SearchOrientations.RightToLeft:
result = new Point[calcRectangle.Height];
for (int j = rect.StartY; j < rect.StopY; j += rect.StepY)
{
for (int i = 0; i < Math.Abs(rect.StopX - rect.StartX); i++)
{
if (maskData[j, rect.StartX + i * rect.StepX, 0] <= 0)
{
continue;
}
result[j - rect.StartY] = new Point(j, i);
break;
}
}
break;
}
}
catch (Exception)
{
_logger?.Error($"Exception during FindPoints, orientation {orientation.ToString()}");
}
return(result);
}
/// <summary>
///
/// </summary>
/// <param name="calcRectangle"></param>
/// <param name="orientation"></param>
/// <returns></returns>
private MyCalculationRectangle DetermineMyRectangle(Rectangle calcRectangle, SearchOrientations orientation)
{
MyCalculationRectangle myrectangle = new MyCalculationRectangle();
switch (orientation)
{
case SearchOrientations.TopToBottom:
myrectangle.StartX = calcRectangle.X;
myrectangle.StartY = calcRectangle.Y;
myrectangle.StopX = calcRectangle.X + calcRectangle.Width;
myrectangle.StopY = calcRectangle.Y + calcRectangle.Height;
myrectangle.StepY = 1;
myrectangle.StepX = 1;
break;
case SearchOrientations.BottomToTop:
myrectangle.StartX = calcRectangle.X;
myrectangle.StartY = calcRectangle.Y + calcRectangle.Height;
myrectangle.StopX = calcRectangle.X + calcRectangle.Width;
myrectangle.StopY = calcRectangle.Y;
myrectangle.StepY = -1;
myrectangle.StepX = 1;
break;
case SearchOrientations.LeftToRight:
myrectangle.StartX = calcRectangle.X;
myrectangle.StartY = calcRectangle.Y;
myrectangle.StopX = calcRectangle.X + calcRectangle.Width;
myrectangle.StopY = calcRectangle.Y + calcRectangle.Height;
myrectangle.StepY = 1;
myrectangle.StepX = 1;
break;
case SearchOrientations.RightToLeft:
myrectangle.StartX = calcRectangle.X + calcRectangle.Width;
myrectangle.StartY = calcRectangle.Y;
myrectangle.StopX = calcRectangle.X;
myrectangle.StopY = calcRectangle.Y + calcRectangle.Height;
myrectangle.StepY = 1;
myrectangle.StepX = -1;
break;
}
return(myrectangle);
}