def Li(self, scene: Scene, renderer: Renderer, ray: Ray, intersection: Intersection, sample: Sample)->Spectrum:
occlusion = 0
intersection.ray_epsilon = infinity_max_f
bsdf = intersection.get_bsdf(ray)
p = bsdf.dgShading.point
n = maths.tools.get_face_forward(intersection.differentialGeometry.normal, -ray.direction)
for i in range(self.samples_count):
w = maths.tools.get_uniform_sample_sphere(random(), random())
if Vector3d.dot(w, n) < 0.0:
w = -w
r = Ray(p, w, 0.01, self.max_distance)
if scene.get_is_intersected(r):
occlusion += 1
return Spectrum(1.0-(float(occlusion) / float(self.samples_count)))
def Unoccluded(self, scene: Scene)->bool:
return not scene.get_is_intersected(self.ray)