def getPixelColor(self, world, ray, curPoint, normal):
initialColor = self.Color
#light color
finalColor = (0,0,0)
#SPECULAR START
#get the reflection of the ray by the normal
reflected = ray.vector.Reflect(normal)
#create a reflected ray
reflectedRay = reverseRay(curPoint, reflected)
#find the ray color of the reflected ray
reflectedColor = world.rayColor(reflectedRay)
#get reflected ray until hits nothing
finalColor = combine(finalColor, self.specular, reflectedColor)
#SPECULAR END
#DIFUSE START
difusePower = 0
#this is the portion that does shadows
#visibleLights = []
flag=True
#find if the light intersects any of the objects
for (obj, material) in world.objectArray:
lightRay = reverseRay(curPoint,world.lightPoint - curPoint)
isIntersect = obj.intersection(lightRay)
if isIntersect is not None and isIntersect > 0.00001:
flag=False
#if a light intersects the object and the current point
#add the difuse
#helps create soft shadows
if flag:
contribution = (world.lightPoint - curPoint).normalized().dot(normal)
if contribution > 0:
difusePower = difusePower + 1.5*contribution
flag = True
#cap the diffuse power
difusePower = min(1,difusePower)
finalColor = combine(finalColor, self.difuse * difusePower, initialColor)
#DIFUSE END
#AMBIENT START
#combine the ambient into the color
finalColor = combine(finalColor, self.ambient, initialColor)
#AMBIENT End
return finalColor
sphere = Sphere(Point(-6 + (offset* 4), 3.4+ (offset%2), -5+(offset * 5)), 2)
sphereColor = (
1/float(random.randrange(1,5+1)),
1/float(random.randrange(1,5+1)),
1/float(random.randrange(1,5+1))
)
mat = Material(sphereColor)
world.add(sphere, mat)
#add plane
world.add(Plane(), Material((0.1,0.3,0.4)))
#print welcome message
startingIntro(numSphere,depth, image.height, image.width, image.name, world.lightPoint)
gaze = reverseRay(world.position, world.eyeDirection - world.position)
cameraUP = gaze.vector.cross(Vector(0,1,0)).normalized()
cameraDir = cameraUP.cross(gaze.vector).normalized()
#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)
