From 15d54cdce309f16796623690de9488f6860c4c48 Mon Sep 17 00:00:00 2001
From: Fisch <interfisch@gmx.net>
Date: Sun, 1 Apr 2018 00:29:17 +0200
Subject: [PATCH] add comments and code cleanup

---
 eh18-image.py | 49 ++++++++++++++++---------------------------------
 1 file changed, 16 insertions(+), 33 deletions(-)

diff --git a/eh18-image.py b/eh18-image.py
index b96e668..4f9f7b1 100644
--- a/eh18-image.py
+++ b/eh18-image.py
@@ -13,78 +13,64 @@ BUFFER_SIZE = 4096
 flutwidth = 1920
 flutheight = 1080
 
-width=200
-height=200
+
 
 s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
 s.connect((TCP_IP, TCP_PORT))
 
-c = '000000'
 
+#Load the Image
 im = Image.open("ctdo.png")
 rgb_im = im.convert('RGBA')
-
-
-
+width, height = im.size #get image size
 
 def randomnumber(pseed,pmin,pmax,v1,v2,v3):
     return (pseed*v1+pseed^2*v2+pseed^3*v3)%(pmax-pmin)+pmin
 
 
-newseed=(int)(time.time()/60)
+newseed=(int)(time.time()/60) #seed based on timestamp (full minutes)
 seed=newseed
 
 user=int(sys.argv[1]) #1..n
 parts=int(sys.argv[2]) #n users
 
-
 if __name__ == '__main__':
-
-
     pixelcoords=[]
     for _x in range(width):
         for _y in range(height):
             pixelcoords+=[(_x,_y)]
 
     random.seed(42)
-    random.shuffle(pixelcoords)
+    random.shuffle(pixelcoords) #pseudorandom order
     print(pixelcoords)
 
+    pixelcoords=pixelcoords[int(len(pixelcoords)/parts)*(user-1):int(len(pixelcoords)/parts)*(user)] #divide in parts for multiple connection
 
-    pixelcoords=pixelcoords[int(len(pixelcoords)/parts)*(user-1):int(len(pixelcoords)/parts)*(user)]
-
-    while True:
+    while True: #Mainloop
         starttime=time.time()
         commandsarray=[]
         seed=newseed
         print("Seed: "+str(seed))
-        #xv=random.randint(0,flutwidth)
-        #yv=random.randint(0,flutheight)
 
-        #xv=random.randint(width/2,flutwidth-width/2)
-        #yv=random.randint(height/2,flutheight-height/2)
-        xv=randomnumber(seed,width/2,flutwidth-width/2, 42,-24,4)
-        yv=randomnumber(seed,height/2,flutheight-height/2, 43,-23,3)
+        xv=randomnumber(seed,width/2,flutwidth-width/2, 42,-24,4) #x position of image
+        yv=randomnumber(seed,height/2,flutheight-height/2, 43,-23,3) #y ""
         print("xv="+str(xv)+ "yv="+str(yv))
         _current_command=""
 
-
-
-
-
-
-        for i,j in pixelcoords:
+        for i,j in pixelcoords: #i,j as xy coordinates from image
             r, g, b,a = rgb_im.getpixel((i, j))
+            #Do stupid stuffz with p1x3ls
+
             if a<=127:
                 continue
             #if r>127:
             #    continue #skip bright pixels
             #r=255-r
 
-
             #_current_command+='PX %d %d %02x%02x%02x\n' % (i+xv,j+yv,r,g,b) #rgb
             _current_command+='PX %d %d %02x\n' % (i+xv-width/2,j+yv-height/2,r) #monochrome only red channel
-            if len(_current_command)>=1400:
+
+            if len(_current_command)>=1400: #divide in packets smaller than 1500 byte
                 commandsarray+=[_current_command.encode()] #append packet
                 _current_command=""
 
@@ -93,16 +79,14 @@ if __name__ == '__main__':
         print("Generated Commands in "+str(time.time()-starttime)+" seconds")
 
 
-        while seed==newseed:
+        while seed==newseed: #as long as position did not change
             try:
                 starttime=time.time()
                 for command in commandsarray:
-
                         s.send(command)
 
-
                 print("Send Image in "+str(time.time()-starttime)+" seconds")
-            except BrokenPipeError:
+            except BrokenPipeError: #Brokn Pipe? Reconnect!!
                 print("BrokenPipeError. Reconnecting")
                 s.close()
                 s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
@@ -111,5 +95,4 @@ if __name__ == '__main__':
 
             newseed=(int)(time.time()/60)
 
-
 exit()