bool IsPointValid(Point p, Color objectColor, UnsafeBitmap bmp, Rectangle boundRect, Point last)
{
if (!boundRect.Contains(p))
{
return(false); //is the point in the image?
}
Color pCol = bmp.GetPixel(p.X, p.Y);
if (CloseTo(pCol, objectColor))
{
return(false); //is the point on the object?
}
if (p == last)
{
return(false);
}
if (PointNearby(p, bmp, boundRect, objectColor))
{
return(true); //is the point next to the object?
}
return(false); //not next to the object, die.
}
List<Point> FindBorders(Point p, Color objectColor, UnsafeBitmap bmp)
{
List<Point> checkedPoints = new List<Point>();
Point current = p;
Point start = p;
Point last = new Point(-1, -1);
Rectangle boundRect = new Rectangle(0, 0, bmp.SafeBitmap.Width, bmp.SafeBitmap.Height);
int i = 0;
bool overflow = false;
do
{
i++;
if (i >= 5000)
{
overflow = true;
break;
}
//bmp.SetPixel(current.X, current.Y, Color.Black);
Point rightp = new Point(current.X + 1, current.Y);
Point leftp = new Point(current.X - 1, current.Y);
Point upp = new Point(current.X, current.Y - 1);
Point downp = new Point(current.X, current.Y + 1);
if (current.X == start.X && current.Y == start.Y && i > 1)
{
break;
}
if (IsPointValid(upp, objectColor, bmp, boundRect, last))
{
last = current;
current = upp;
checkedPoints.Add(upp);
continue;
}
else if (IsPointValid(leftp, objectColor, bmp, boundRect, last))
{
last = current;
current = leftp;
checkedPoints.Add(leftp);
continue;
}
else if (IsPointValid(downp, objectColor, bmp, boundRect, last))
{
last = current;
current = downp;
checkedPoints.Add(downp);
continue;
}
else if (IsPointValid(rightp, objectColor, bmp, boundRect, last))
{
last = current;
current = rightp;
checkedPoints.Add(rightp);
continue;
}
} while (current != start);
if (!overflow)
{
return checkedPoints;
}
else
{
return new List<Point>();
}
}
bool PointNearby(Point center, UnsafeBitmap bmp, Rectangle boundRect, Color objectColor)
{
Point p = new Point(center.X, center.Y - 1);//up
if (boundRect.Contains(p))
if (CloseTo(bmp.GetPixel(p.X, p.Y), objectColor)) return true;
p = new Point(center.X + 1, center.Y - 1);//upright
if (boundRect.Contains(p))
if (CloseTo(bmp.GetPixel(p.X, p.Y), objectColor)) return true;
p = new Point(center.X + 1, center.Y);//right
if (boundRect.Contains(p))
if (CloseTo(bmp.GetPixel(p.X, p.Y), objectColor)) return true;
p = new Point(center.X + 1, center.Y + 1);//downright
if (boundRect.Contains(p))
if (CloseTo(bmp.GetPixel(p.X, p.Y), objectColor)) return true;
p = new Point(center.X, center.Y + 1); //down
if (boundRect.Contains(p))
if (CloseTo(bmp.GetPixel(p.X, p.Y), objectColor)) return true;
p = new Point(center.X - 1, center.Y + 1); //downleft
if (boundRect.Contains(p))
if (CloseTo(bmp.GetPixel(p.X, p.Y), objectColor)) return true;
p = new Point(center.X - 1, center.Y); //left
if (boundRect.Contains(p))
if (CloseTo(bmp.GetPixel(p.X, p.Y), objectColor)) return true;
p = new Point(center.X - 1, center.Y - 1); //upleft
if (boundRect.Contains(p))
if (CloseTo(bmp.GetPixel(p.X, p.Y), objectColor)) return true;
return false;
}
bool IsPointValid(Point p, Color objectColor, UnsafeBitmap bmp, Rectangle boundRect, Point last)
{
if (!boundRect.Contains(p)) return false; //is the point in the image?
Color pCol = bmp.GetPixel(p.X, p.Y);
if (CloseTo(pCol, objectColor)) return false; //is the point on the object?
if (p == last) return false;
if (PointNearby(p, bmp, boundRect, objectColor)) return true; //is the point next to the object?
return false;//not next to the object, die.
}
private void GetRectangles(Bitmap img, out List<Rectangle> rects, out UnsafeBitmap uBtm)
{
Rectangle boundRect = new Rectangle(0, 0, img.Width, img.Height);
rects = new List<Rectangle>();
uBtm = new UnsafeBitmap(img);
int w = img.Width;
int h = img.Height;
uBtm.LockBits();
List<Point> points = new List<Point>();
for (int i = 0; i < 1; i++)
{
for (int y = 0; y < h; y += 20)
{
for (int x = 0; x < w; x += 20)
{
Color c = uBtm.GetPixel(x, y);
if (CloseTo(c, Color.FromArgb(0, 255, 0)) || CloseTo(c, Color.Blue) || CloseTo(c, Color.Red) || CloseTo(c, Color.Black))
{
int newx = x;
int newy = y;
while (true)
{
newx = newx - 1;
newy = newy - 1;
Color newc = uBtm.GetPixel(newx, newy);
if (!boundRect.Contains(newx, newy))
{
break;
}
if (!CloseTo(newc, c))
{
Point newp = new Point(newx, newy);
bool pointExists = false;
foreach (Rectangle r in rects)
{
if (r.Contains(newp))
{
pointExists = true;
break;
}
}
if (pointExists)
{
break;
}
points = FindBorders(newp, c, uBtm);
if (points.Count == 0) break;
Point top, bottom, left, right;
top = bottom = left = right = points[0];
foreach (Point p in points)
{
if (p.Y < top.Y) top = p;
if (p.Y > bottom.Y) bottom = p;
if (p.X < left.X) left = p;
if (p.X > right.X) right = p;
}
Rectangle rect = new Rectangle(left.X, top.Y, right.X - left.X, bottom.Y - top.Y);
rects.Add(rect);
break;
}
}
}
}
}
}
uBtm.UnlockBits();
}
bool PointNearby(Point center, UnsafeBitmap bmp, Rectangle boundRect, Color objectColor)
{
Point p = new Point(center.X, center.Y - 1);//up
if (boundRect.Contains(p))
{
if (CloseTo(bmp.GetPixel(p.X, p.Y), objectColor))
{
return(true);
}
}
p = new Point(center.X + 1, center.Y - 1);//upright
if (boundRect.Contains(p))
{
if (CloseTo(bmp.GetPixel(p.X, p.Y), objectColor))
{
return(true);
}
}
p = new Point(center.X + 1, center.Y);//right
if (boundRect.Contains(p))
{
if (CloseTo(bmp.GetPixel(p.X, p.Y), objectColor))
{
return(true);
}
}
p = new Point(center.X + 1, center.Y + 1);//downright
if (boundRect.Contains(p))
{
if (CloseTo(bmp.GetPixel(p.X, p.Y), objectColor))
{
return(true);
}
}
p = new Point(center.X, center.Y + 1); //down
if (boundRect.Contains(p))
{
if (CloseTo(bmp.GetPixel(p.X, p.Y), objectColor))
{
return(true);
}
}
p = new Point(center.X - 1, center.Y + 1); //downleft
if (boundRect.Contains(p))
{
if (CloseTo(bmp.GetPixel(p.X, p.Y), objectColor))
{
return(true);
}
}
p = new Point(center.X - 1, center.Y); //left
if (boundRect.Contains(p))
{
if (CloseTo(bmp.GetPixel(p.X, p.Y), objectColor))
{
return(true);
}
}
p = new Point(center.X - 1, center.Y - 1); //upleft
if (boundRect.Contains(p))
{
if (CloseTo(bmp.GetPixel(p.X, p.Y), objectColor))
{
return(true);
}
}
return(false);
}
private void GetRectangles(Bitmap img, out List <Rectangle> rects, out UnsafeBitmap uBtm)
{
Rectangle boundRect = new Rectangle(0, 0, img.Width, img.Height);
rects = new List <Rectangle>();
uBtm = new UnsafeBitmap(img);
int w = img.Width;
int h = img.Height;
uBtm.LockBits();
List <Point> points = new List <Point>();
for (int i = 0; i < 1; i++)
{
for (int y = 0; y < h; y += 20)
{
for (int x = 0; x < w; x += 20)
{
Color c = uBtm.GetPixel(x, y);
if (CloseTo(c, Color.FromArgb(0, 255, 0)) || CloseTo(c, Color.Blue) || CloseTo(c, Color.Red) || CloseTo(c, Color.Black))
{
int newx = x;
int newy = y;
while (true)
{
newx = newx - 1;
newy = newy - 1;
Color newc = uBtm.GetPixel(newx, newy);
if (!boundRect.Contains(newx, newy))
{
break;
}
if (!CloseTo(newc, c))
{
Point newp = new Point(newx, newy);
bool pointExists = false;
foreach (Rectangle r in rects)
{
if (r.Contains(newp))
{
pointExists = true;
break;
}
}
if (pointExists)
{
break;
}
points = FindBorders(newp, c, uBtm);
if (points.Count == 0)
{
break;
}
Point top, bottom, left, right;
top = bottom = left = right = points[0];
foreach (Point p in points)
{
if (p.Y < top.Y)
{
top = p;
}
if (p.Y > bottom.Y)
{
bottom = p;
}
if (p.X < left.X)
{
left = p;
}
if (p.X > right.X)
{
right = p;
}
}
Rectangle rect = new Rectangle(left.X, top.Y, right.X - left.X, bottom.Y - top.Y);
rects.Add(rect);
break;
}
}
}
}
}
}
uBtm.UnlockBits();
}
List <Point> FindBorders(Point p, Color objectColor, UnsafeBitmap bmp)
{
List <Point> checkedPoints = new List <Point>();
Point current = p;
Point start = p;
Point last = new Point(-1, -1);
Rectangle boundRect = new Rectangle(0, 0, bmp.SafeBitmap.Width, bmp.SafeBitmap.Height);
int i = 0;
bool overflow = false;
do
{
i++;
if (i >= 5000)
{
overflow = true;
break;
}
//bmp.SetPixel(current.X, current.Y, Color.Black);
Point rightp = new Point(current.X + 1, current.Y);
Point leftp = new Point(current.X - 1, current.Y);
Point upp = new Point(current.X, current.Y - 1);
Point downp = new Point(current.X, current.Y + 1);
if (current.X == start.X && current.Y == start.Y && i > 1)
{
break;
}
if (IsPointValid(upp, objectColor, bmp, boundRect, last))
{
last = current;
current = upp;
checkedPoints.Add(upp);
continue;
}
else if (IsPointValid(leftp, objectColor, bmp, boundRect, last))
{
last = current;
current = leftp;
checkedPoints.Add(leftp);
continue;
}
else if (IsPointValid(downp, objectColor, bmp, boundRect, last))
{
last = current;
current = downp;
checkedPoints.Add(downp);
continue;
}
else if (IsPointValid(rightp, objectColor, bmp, boundRect, last))
{
last = current;
current = rightp;
checkedPoints.Add(rightp);
continue;
}
} while (current != start);
if (!overflow)
{
return(checkedPoints);
}
else
{
return(new List <Point>());
}
}