SingleSphere class definition

For a single collision sphere, in fact, and a plurality of balls the same, but I modified the code in the book, so much the definition of class, finally coming to an end. Soon demonstrated when a miracle.

Class definition:

#pragma once
#ifndef __SINGLESPHERE_HEADER__
#define __SINGLESPHERE_HEADER__

#include "tracer.h"

class SingleSphere : public Tracer {
public:
	SingleSphere(World* wr_ptr);
	virtual ~SingleSphere();
	virtual RGBColor trace_ray(const Ray& ray) const;
private:
	SingleSphere();
};
#endif

Class implementation:

#include "pch.h"
#include "singlesphere.h"
#include "../utilities/world.h"

SingleSphere::SingleSphere(World* wr_ptr) :Tracer(wr_ptr) {}

SingleSphere::~SingleSphere() {}

RGBColor SingleSphere::trace_ray(const Ray& ray) const {
	ShadeRec sr(world_ptr->hit_bare_bones_objects(ray));
	if (sr.hit_an_object && world_ptr->get_object_size() == 1) //这里限制了一个球体
		return sr.color;
	return RGBColor();
}