added labyrinth script

README.md

@@ -3,6 +3,7 @@ Where I store small Python projects
 
 * [EZ Net](#ez-net)
 * [Graph (french)](#graph-french-)
+* [Labyrinth](#labyrinth)
 * [PI Dichotomy](#pi-dichotomy)
 
 
@@ -16,6 +17,11 @@ A tool to make beautiful mathematical curves
 
 ![preview](graph/preview.jpg)
 
+## Labyrinth
+Encode a text into a labyrinth image like this :
+
+![preview](labyrinth/preview.jpg)
+
 ## PI Dichotomy
 What happens when you execute dichotomy on PI starting with 4 ? Result : an infinite binary data, i used it to generate bitmaps and sound.
 Obviously I didn't had infinite PI digits but "only" the 1st million.

labyrinth/labyrinth.py

@@ -0,0 +1,135 @@
+import tkinter as tk
+import math
+import binascii
+
+HEIGHT = 750 #px
+WIDTH = 750 #px
+RSTEP = 20 #px
+
+STARTTXT = "Never gonna give you up; Never gonna let you down;"
+
+arcs = 6
+
+def vline(c,a,r0,r1,med):
+    if not(med):
+        ar = math.radians(a)
+        x0 = WIDTH / 2 + r0 * math.cos(ar)
+        x1 = WIDTH / 2 + r1 * math.cos(ar)
+        y0 = HEIGHT / 2 + r0 * math.sin(ar)
+        y1 = HEIGHT / 2 + r1 * math.sin(ar)
+        c.create_line(x0, y0, x1, y1)
+    else:
+        ar0 = math.radians(a-ASTEP)
+        ar1 = math.radians(a+ASTEP)
+        x0 = WIDTH / 2 + r0 * math.cos(ar0)
+        x1 = WIDTH / 2 + r1 * math.cos(ar0)
+        y0 = HEIGHT / 2 + r0 * math.sin(ar0)
+        y1 = HEIGHT / 2 + r1 * math.sin(ar0)
+        x2 = WIDTH / 2 + r0 * math.cos(ar1)
+        x3 = WIDTH / 2 + r1 * math.cos(ar1)
+        y2 = HEIGHT / 2 + r0 * math.sin(ar1)
+        y3 = HEIGHT / 2 + r1 * math.sin(ar1)
+        c.create_line((x0 + x2)/2, (y0+y2)/2, (x1+x3)/2, (y1+y3)/2)
+
+def hline(c,a0,a1,r,med):
+    if not(med):
+        ar0 = math.radians(a0)
+        ar1 = math.radians(a1+ASTEP)
+        x0 = WIDTH / 2 + r * math.cos(ar0)
+        x1 = WIDTH / 2 + r * math.cos(ar1)
+        y0 = HEIGHT / 2 + r * math.sin(ar0)
+        y1 = HEIGHT / 2 + r * math.sin(ar1)
+        c.create_line(x0, y0, (x0+x1)/2, (y0+y1)/2)
+    else:
+        ar0 = math.radians(a0-ASTEP)
+        ar1 = math.radians(a1)
+        x0 = WIDTH / 2 + r * math.cos(ar0)
+        x1 = WIDTH / 2 + r * math.cos(ar1)
+        y0 = HEIGHT / 2 + r * math.sin(ar0)
+        y1 = HEIGHT / 2 + r * math.sin(ar1)
+        c.create_line((x0+x1)/2,(y0+y1)/2, x1, y1)
+
+def text2bin(txt):
+    b = ' '.join(format(ord(x), 'b') for x in txt)
+    return b.replace(' ','')
+
+def addArc(*args):
+    global arcs
+    arcs += 1
+    update()
+
+def lessArc(*args):
+    global arcs
+    arcs -= 1
+    if arcs < 3:
+        arcs = 3
+    else:
+        update()
+
+def update(*args):
+    global c, ASTEP, ASTART
+
+    ASTEP = 180/arcs #angle in degrees
+    ASTART = 0 #int * ASTEP
+
+    c.create_rectangle(0, 0, WIDTH, HEIGHT, fill="white")
+    
+    val = text2bin(txt.get())
+
+    a = ASTART
+    d = 40
+    outer = False
+
+    while a*ASTEP < 360:
+        hline(c,a*ASTEP,(a+1)*ASTEP,d, a%2 == 0)
+        hline(c,a*ASTEP,(a+1)*ASTEP,d-1, a%2 == 0)
+        hline(c,a*ASTEP,(a+1)*ASTEP,d-2, a%2 == 0)
+        a += 1
+
+    a = ASTART
+
+    for ch in val:
+        if (ch == '1') ^ a%2 == 0:
+            if outer:
+                hline(c,a*ASTEP,(a+1)*ASTEP,d+RSTEP, a%2 == 0)
+            else:
+                vline(c,a*ASTEP,d,d+RSTEP,a%2 == 0)
+        a += 1
+        if a*ASTEP > 360:
+            a -= int(360/ASTEP)
+            outer = not(outer)
+            if not(outer):
+                d += RSTEP
+
+    a = ASTART
+
+    if outer:
+        d += RSTEP
+
+    while a*ASTEP < 360:
+        hline(c,a*ASTEP,(a+1)*ASTEP,d+RSTEP, a%2 == 0)
+        hline(c,a*ASTEP,(a+1)*ASTEP,d+RSTEP+1, a%2 == 0)
+        hline(c,a*ASTEP,(a+1)*ASTEP,d+RSTEP+2, a%2 == 0)
+        a += 1
+
+top = tk.Tk()
+
+txt = tk.StringVar()
+txt.set(STARTTXT)
+txt.trace('w',update)
+
+e = tk.Entry(top,width=100,textvariable=txt)
+e.grid(row=0,column=0)
+
+bl = tk.Button(top, text="-", command=lessArc)
+bl.grid(row=0,column=1)
+
+bp = tk.Button(top, text="+", command=addArc)
+bp.grid(row=0,column=2)
+
+c = tk.Canvas(top, height=HEIGHT, width=WIDTH)
+c.grid(row=1,column=0,columnspan=3)
+
+update()
+
+top.mainloop()