metal.h

#ifndef METAL_H
#define METAL_H

#include "material.h"

class Metal : public Material {
public:
    Metal(const Vector3D &a, double f) : m_vAlbedo(a) {
        if (f < 1) { m_dFuzz = f; } // Shift ray scatter by dFuzz amount to blur reflection.
        else { m_dFuzz = 1; } // If fuzz is disabled, do not alter reflection.
    }
    virtual bool Scatter(const Ray &r_in, const HitRecord &rec, Vector3D &attenuation, Ray &scattered) const {
        Vector3D vReflected = Reflect(UnitVector(r_in.Direction()), rec.m_vNormal);
        scattered = Ray(rec.m_vP, vReflected + m_dFuzz * RandomInUnitSphere()); 
        attenuation = m_vAlbedo;
        return (scattered.Direction().Dot(rec.m_vNormal) > 0);
    }
    virtual int MatType() const {
        return 1;
    }
    virtual Vector3D MatColor() const {
        return m_vAlbedo;
    }
    virtual double MatFuzz() const {
        return m_dFuzz;
    }
    virtual double MatRef() const {
        return 0;
    }
    Vector3D m_vAlbedo; 
    double m_dFuzz; 
};
#endif // METAL_H