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floodfill.py
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floodfill.py
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from bressenham_and_DDA import main
from graphics import *
window_w = 800
window_h = 800
points=[]
def DrawAxis(win):
for i in range(window_h):
pt = Point(window_w/2,i)
pt.draw(win)
for i in range(window_w):
pt = Point(i,window_h/2)
pt.draw(win)
def ConvertPixel(xx,yy):
xx+=window_w/2
yy = -yy
yy+=window_h/2
return xx,yy
def BresenhamLine(x1,y1,x2,y2,win):
x, y = x1, y1
dx = abs(x2 - x1)
dy = abs(y2 - y1)
if x1==x2 and y1==y2 :
PutPixle(win,x,y)
elif y1==y2:
if x1<x2:
while x != x2 :
PutPixle(win,x,y)
x+=1
else:
while x != x2 :
PutPixle(win,x,y)
x-=1
elif (x1==x2):
if y1<y2:
while y!=y2:
PutPixle(win,x,y)
y+=1
else:
while y!=y2:
PutPixle(win,x,y)
y-=1
elif dy<dx:
xIncrement = 0
yIncrement = 0
if x1<x2:
xIncrement = 1
else:
xIncrement = -1
if y1<y2:
yIncrement = 1
else:
yIncrement = -1
p = 2*dy-dx
while x != x2:
if p>0:
p=p+2*(dy-dx)
y+=yIncrement
else:
p = p+2*dy
x+=xIncrement
PutPixle(win,x,y)
else:
xIncrement = 0
yIncrement = 0
if x1<x2:
xIncrement = 1
else:
xIncrement = -1
if y1<y2:
yIncrement = 1
else:
yIncrement = -1
p = 2*dx-dy
while y != y2:
if p>0:
p=p+2*(dx-dy)
x+=xIncrement
else:
p = p+2*dx
y+=yIncrement
PutPixle(win,x,y)
PutPixle(win,x2,y2)
def PutPixle(win, x, y):
newx, newy = ConvertPixel(x,y)
points[int(newx)][int(newy)]="bc"
print(newx,newy)
pt = Point(newx,newy)
pt.draw(win)
def flood_fill(window):
print("Click anywhere inside the polgon to fill it::\n")
seed_point=(window.getMouse())
lis=[]
lis.append(seed_point)
fc="fc"
oc="blue"
while(len(lis)!=0):
pt=lis[len(lis)-1]
lis.pop()
x = int(pt.getX())
y = int(pt.getY())
if(points[x][y]!=fc and points[x][y]==oc):
window.plot(x,y,"red")
points[x][y]=fc
pt=Point(x+1,y)
if(points[x+1][y]==oc and points[x+1][y]!=fc):
lis.append(pt)
pt=Point(x,y+1)
if(points[x][y+1]==oc and points[x][y+1]!=fc):
lis.append(pt)
pt=Point(x-1,y)
if(points[x-1][y]==oc and points[x-1][y]!=fc):
lis.append(pt)
pt=Point(x,y-1)
if(points[x][y-1]==oc and points[x][y-1]!=fc):
lis.append(pt)
def FloodFillInit():
for i in range(window_w):
points.append([])
for j in range(window_h):
points[i].append("blue")
print("Enter no. of sides in polygon:")
s=int(input("Enter sides:"))
print("Enter the points:")
po=[]
for i in range(s):
print("enter x coordinate of point-",i+1,":")
x=int(input())
print("enter y coordinate of point-",i+1,":")
y=int(input())
a=[x,y]
po.append(a)
window=GraphWin("Flood Fill Polygon Filling Algorithm",window_w,window_h)
window.setBackground("blue")
DrawAxis(window)
for i in range(s):
x1 = po[i][0]
y1 = po[i][1]
x2 = po[(i+1)%s][0]
y2 = po[(i+1)%s][1]
BresenhamLine(x1,y1,x2,y2,window)
flood_fill(window)
window.getMouse()
window.close()
def main():
FloodFillInit()
FloodFillInit()
if __name__ == "__main__":
main()