Added Jitter algrothems

Author: phire

antiAlaising.py

@@ -1,6 +1,7 @@
 from geom3 import Point3, Vector3, Ray3, cross, dot, unit, length
 from colour import Colour
 from math import sqrt
+import random
 
 class NoAA(object):
     def __init__(self, eyepoint, rayfunc):
@@ -37,3 +38,42 @@ def getPixel(self, pixelBox):
 	return colour / count
 
 
+class Jitter(object):
+    def __init__(self, eyepoint, rayfunc, subPixels=4):
+	self.eye = eyepoint
+	self.rayfunc = rayfunc
+	self.subPixels= int(sqrt(subPixels))
+
+    def getPixel(self, pixelBox):
+	(x, y, x2, y2) = pixelBox
+	pitch = (x2 - x)/ self.subPixels
+	xx = x
+	yy = y
+	count = 0
+	colour = Colour(0,0,0)
+	for col in range(self.subPixels):
+	    for row in range(self.subPixels):
+	        colour += self.rayfunc(Ray3(self.eye, (Point3(xx + random.uniform(0, pitch) ,yy + random.uniform(0, pitch),1) - self.eye)))
+                count += 1
+		yy += pitch
+	    yy = y
+	    xx += pitch
+	assert count == self.subPixels * self.subPixels
+	return colour / count
+
+class Jitter2(object):
+    def __init__(self, eyepoint, rayfunc, subPixels=4):
+	self.eye = eyepoint
+	self.rayfunc = rayfunc
+	self.subPixels= subPixels
+
+    def getPixel(self, pixelBox):
+	(x, y, x2, y2) = pixelBox
+	pixSize = x2 - x
+	colour = Colour(0,0,0)
+	for i in range(self.subPixels):
+	    colour += self.rayfunc(Ray3(self.eye, (Point3(random.uniform(x,x2) ,random.uniform(y,y2),1) - self.eye)))
+	return colour / self.subPixels
+
+
+

rayCaster.py

@@ -80,7 +80,7 @@ def rayColour(self, ray, depth=0):
     # Main body. Set up an image then compute colour at each pixel
     def trace(self):
         img = Image.new("RGB", (WIN_SIZE, WIN_SIZE))
-	aa = SuperSampling(EYEPOINT, self.rayColour, 16)
+	aa = Jitter(EYEPOINT, self.rayColour, 16)
 	print "Tracing Rays:"
 	count = 0
 	max = float(WIN_SIZE**2)