Add profiling with Remotery

sphere.hpp

@@ -25,17 +25,27 @@ struct sphere : hittable {
 /* Virtual method implementations */
 bool sphere::hit(const ray& r, double t_min, double t_max, hit_record& rec) const
 {
+    rmt_ScopedCPUSample(Sphere_Hit, RMTSF_Aggregate);
+
+    // Part 1
+
     vec3 oc = r.origin - center;
     double a = r.direction.length_squared();
     double half_b = dot(oc, r.direction);
     double c = oc.length_squared() - radius*radius;
 
+
+    // Part 2
+
     double discriminant = half_b*half_b - a*c;
     if (discriminant < 0)
         return false;
     double sqrtd = sqrt(discriminant);
 
+    
     // Find the nearest root that lies in the acceptable range
+    // Part 3
+
     double root = (-half_b - sqrtd) / a;
     if (root < t_min || t_max < root)
     {
@@ -44,6 +54,8 @@ bool sphere::hit(const ray& r, double t_min, double t_max, hit_record& rec) cons
             return false;       
     }
 
+    // Part 4
+
     rec.t = root;
     rec.p = r.at(rec.t);
     vec3 outward_normal = (rec.p - center) / radius;