#compute field of view
ratio = float (image.height)/float(image.width)
#45 degree field of view
fieldRad = math.pi * (float(45) / float(2) / float(180))
#get world dimensions
width = (math.tan(fieldRad) * 2.0)
height = ratio * math.tan(fieldRad) * 2.0
pixelWidth = width / (image.width - 1)
pixelHeight = height / (image.height - 1)
#begin ray tracing
for y in range(image.height):
for x in range(image.width):
xOffset = cameraUP*(x * pixelWidth - (width/2))
yOffset = cameraDir*(y * pixelHeight - (height/2))
#if x is 1 and y is 1:
# print xOffset.x, xOffset.y, xOffset.z
# print yOffset.x, yOffset.y, yOffset.z
ray = reverseRay(gaze.point, gaze.vector + xOffset + yOffset)
color = world.rayColor(ray)
image.load(x,y,*color)
print 'All done, look in this directory for ' + image.name
image.toFile()
