diff -r ccbf96145796 -r 89d76549ba6e caurender.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/caurender.py	Thu Dec 30 14:22:05 2010 +0100
@@ -0,0 +1,46 @@
+import Tkinter as tk
+from caugrid import Grid
+
+class Render(object):
+	def __init__(self, title, width, height):
+		self.title = title		
+		self.width = width
+		self.height = height
+		self.root = tk.Tk(className=title, sync=1)
+		self.canvas = tk.Canvas(width=self.width, height=self.height, bg="black")
+		self.canvas.pack(expand=tk.YES, fill=tk.BOTH)
+	def render(self, grid):
+		offset = (self.width / 2, self.height / 2)
+		size = 1
+		cell_ids = []
+		for pos in grid.cells.iterkeys():
+			x = pos[0] + offset[0]
+			y = pos[1] + offset[1]
+			cell_id = self.canvas.create_rectangle(x, y, x+size, y+size, 
+					fill="yellow", width=0)
+			cell_ids.append(cell_id)
+		self.root.update()
+		for cell_id in cell_ids:
+			self.canvas.delete(cell_id)
+
+import sys
+import time
+import caumarshal as marshal
+import os, stat
+
+def main():
+	filename = sys.argv[1]
+	print "rendering ", filename	
+	render = Render("hope", 800, 800)
+	mod_time = 0
+	while True:
+		current = os.stat(filename)[stat.ST_MTIME]
+		if current > mod_time:
+			mod_time = current
+			print "updating render"
+			grid = marshal.loadGrid(filename)
+			render.render(grid)
+		time.sleep(1)
+
+if __name__ == "__main__":
+	main()