private Point?GetNextPoint(Point currentPoint, Point directionPoint)
{
var diffX = directionPoint.X - currentPoint.X;
var diffY = directionPoint.Y - currentPoint.Y;
var startIndex = GetStartIndex(diffX, diffY);
for (int index = startIndex; index < startIndex + PointRotation.Count; index++)
{
var rotationPoint = PointRotation.GetPoint(index);
var x = (int)(currentPoint.X + rotationPoint.X);
var y = (int)(currentPoint.Y + rotationPoint.Y);
if (this.contourMap.IsSet(x, y))
{
return(new Point(x, y, this.contourMap[x, y]));
}
}
return(null);
}