Method ray_trace

benchmark/bench/raytracer.java:69–79

(Vec light, Ray ray, Scene scene)

        }
    }
    double ray_trace(Vec light, Ray ray, Scene scene) {
        Hit i = scene.intersect(new Hit(infinity, new Vec(0, 0, 0)), ray);
        if (i.lambda == infinity) return 0;
        Vec o = add(ray.orig, add(scale(i.lambda, ray.dir),
                      scale(delta, i.normal)));
        double g = dot(i.normal, light);
        if (g >= 0) return 0.;
        Ray sray = new Ray(o, scale(-1, light));
        Hit si = scene.intersect(new Hit(infinity, new Vec(0, 0, 0)), sray);
        return (si.lambda == infinity ? -g : 0);
    }
    Scene create(int level, Vec c, double r) {
        Sphere sphere = new Sphere(c, r);
        if (level == 1) return sphere;