def render():
print "Ray Tracing Started"
HRES = IMAGE_SIZE[0]
VRES = IMAGE_SIZE[1]
aspect_ratio = float(HRES) / VRES
#Camera parameters to be abstracted away later
fovy = 45.0 * (pi / 180.0)
#UNIT_Y is up
eye = Vector3(0, 0, 0)
look_at = Vector3(0, 0, -10)
d = 1 / tan(fovy/2)
#End camera parameters
#Calculate orthonormal basis
l = look_at - eye
l.normalise()
v = cross_product(l, UNIT_Y)
v.normalise()
#Note that u is a unit vector!
u = cross_product(v, l)
#Note: v is right and u is up on the image plane
#Find the lower left corner
#look_at is the center of the image plane...
ll = eye + l * d - v * aspect_ratio - u
#End calculations
rays = []
v_step = 2.0 / VRES
h_step = 2.0 * aspect_ratio / HRES
height = IMAGE_SIZE[1]
width = IMAGE_SIZE[0]
image_buf = []
for x in xrange(width):
if x == (width * 0.25):
print "25% complete..."
if x == (width * 0.5):
print "50% complete..."
if x == (width * 0.75):
print "75% complete..."
if x == (width - 1):
print "100% complete..."
for y in xrange(height):
p = ll + v * h_step * float(x) + u * v_step * float(y)
d = p - eye
d.normalise()
primary_ray = Ray(eye, d)
color = ray_trace(primary_ray)
image_buf.append(clamp(color))
return image_buf
def render(ray_buffer = []):
print "Ray Tracing Started"
height = IMAGE_SIZE[1]
width = IMAGE_SIZE[0]
image_buf = []
for x in range(width):
if x == (width * 0.25):
print "25% complete..."
if x == (width * 0.5):
print "50% complete..."
if x == (width * 0.75):
print "75% complete..."
if x == (width - 1):
print "100% complete..."
for y in range(height):
primary_ray = ray_buffer[x * height + y]
color = ray_trace(primary_ray)
image_buf.append(clamp(color))
return image_buf
