# by Antoni Gual Via 4/2015
from tkinter import Tk, Canvas, PhotoImage,NW,mainloop
from time import clock
def mandel_pixel(kx,ky):
""" calculates the color index of the mandelbrot plane point passed in the arguments """
maxIt = 256
c = complex(kx, ky)
z = c
for i in range(maxIt):
a = z * z
z = a + c
if a.real >= 4.:
return i
return 256
def mandelbrot(xa,xb,ya,yb,x,y):
""" returns a mandelbrot in a string for Tk PhotoImage"""
#color string table in Photoimage format #RRGGBB
clr=[ ' #%02x%02x%02x' % (255-int(255*((i/255)**12)),0,0) for i in range(255,-1,-1)]
clr.append(' #000000') #append the color of the centre as index 256
#calculate mandelbrot x,y coordinates for each screen pixel
xm=[xa + (xb - xa) * kx /x for kx in range(x)]
ym=[ya + (yb - ya) * ky /y for ky in range(y)]
#build the Photoimage string by calling mandel_pixel to index in the color table
return" ".join((("{"+"".join(clr[mandel_pixel(i,j)] for i in xm))+"}" for j in ym))
#window size
x=640
y=480
#corners of the mandelbrot plan to display
xa = -2.0; xb = 1.0
ya = -1.27; yb = 1.27
#Tkinter window
window = Tk()
canvas = Canvas(window, width = x, height = y, bg = "#000000");canvas.pack()
img = PhotoImage(width = x, height = y)
canvas.create_image((0, 0), image = img, state = "normal", anchor = NW)
#do the mandelbrot
t1=clock()
img.put(mandelbrot(xa,xb,ya,yb,x,y))
print(clock()-t1, ' seconds')
mainloop()
Diff to Previous Revision
--- revision 5 2015-04-23 17:42:31
+++ revision 6 2015-04-23 18:34:02
@@ -17,7 +17,7 @@
def mandelbrot(xa,xb,ya,yb,x,y):
""" returns a mandelbrot in a string for Tk PhotoImage"""
- #color string table in Photoimageform
+ #color string table in Photoimage format #RRGGBB
clr=[ ' #%02x%02x%02x' % (255-int(255*((i/255)**12)),0,0) for i in range(255,-1,-1)]
clr.append(' #000000') #append the color of the centre as index 256
#calculate mandelbrot x,y coordinates for each screen pixel
