some infos in the readme added

README

@@ -2,25 +2,44 @@ Install dependencies:
 
 sudo apt-get install libboost-all-dev libncurses5-dev libglibmm-2.4-dev build-essential
 
+= setup =
+The system is set up of various parts. See frameserver.png
+
+Latest setup is:
+* displayclienthtml/ws_udp.js
+A nodjs server => $ node displayclienthtml/ws_udp.js
+This listens for UDP packets to show on a virtual building
+This server creates a webserver where a browser can connect to see a simulation
+of the building. => $ firefox/chromium displayclienthtml/visionneuse.html 
+
+* frameserver 
+A c++ program recieving UDP frames combining them to generate the final display
+
+* clients
+Written in any language, creates UDP packets which are sent to the frameserver
+
 = Building configuration =
 
 The main configuration of the frameserver is done in <defines.h>
 
 Main tuneables:
 
+// where to send the UDP output of the frameserver
 #define REMOTE_IP "127.0.0.1"
 #define REMOTE_PORT 1234
 
-#define HASH "abcdefghij"
+// description of the frame this server understands
+#define HASH "s2l\n8>18> "
 // one byte number + 10 character hash plus newline
 #define HEADEROFFSET 12
 
-// 12 windows per floor, 7 floors, Value:Alpha
+// 12 windows per floor, 8 floors, Value:Alpha
 #define WIDTH 12
-#define HEIGHT 7
+#define HEIGHT 8
-#define CHANNELS 2
+// always has an alpha channel so for rgb it's 3+1=4
+#define CHANNELS 4
 
-// 8 segments per window, 12 segments per floor, RGBA
+// 8 segments per window (7 seg plus dot), 12 segments per floor, RGBA
 #define SEGNUM 8
 #define SEGWIDTH 12
 #define SEGCHANNELS 4