def __init__(self, color1=Pixel.fromHex("#FFFFFF"), color2=Pixel.fromHex("#000000"), ambient=0.05, diffuse=1.0, specular=1.0, reflection=0.5):
self.color1 = color1
self.color2 = color2
self.ambient = ambient
self.diffuse = diffuse
self.specular = specular
self.reflection = reflection
def colorAt(self, objHit, hitPos, normal, scene):
material = objHit.material
objColor = material.colorAt(hitPos)
toCam = scene.camera.centerPoint - hitPos
specularK = 50
color = material.ambient * Pixel.fromHex("#000000")
#light calculations
for light in scene.lights:
toLight = Ray(hitPos, light.position - hitPos)
#diffuse shading
color += (objColor * material.diffuse *
max(normal.dot(toLight.direction), 0))
#Specular shading
halfVector = (toLight.direction + toCam).normalize()
color += light.color * material.specular * max(
normal.dot(halfVector), 0)**specularK
return color
from pixel import Pixel
from scene import Scene
from sphere import Sphere
from vector import Vector
from camera import Camera
from point import Point
from material import Material, ChequeredMaterial
from light import Light
COLS = 1920
ROWS = 1080
RENDEREDIMG = "twospheres.ppm"
CAMERA = Camera(Vector(0, -0.35, -1))
OBJECTS = [
#Ground
Sphere(
Point(0, 10000.5, 1), 10000.0,
ChequeredMaterial(color1=Pixel.fromHex("#420500"),
color2=Pixel.fromHex("#E6B87D"),
ambient=0.2,
reflection=0.2)),
#Blue ball
Sphere(Point(0.75, -.1, 1), 0.6, Material(Pixel.fromHex("#0000FF"))),
#Pink ball
Sphere(Point(-0.75, -0.1, 2.25), 0.6, Material(Pixel.fromHex("#803980")))
]
LIGHTS = [
Light(Point(1.5, -.5, -10), Pixel.fromHex("#FFFFFF")),
Light(Point(-.5, -10, -10), Pixel.fromHex("#E6E6E6"))
]
