material.h

#ifndef MATERIAL_H
#define MATERIAL_H

struct HitRecord;

#include "object.h"

class Material {
public:
    virtual bool Scatter(const Ray &r_in, const HitRecord &rec, Vector3D &attenuation, Ray &scattered) const = 0;
    virtual int MatType() const = 0;
    virtual Vector3D MatColor() const = 0;
    virtual double MatFuzz() const = 0;
    virtual double MatRef() const = 0;
    static Vector3D Reflect(const Vector3D &v, const Vector3D &n) {
        return v - 2 * StdDot(v, n)*n;
    }
    static Vector3D RandomInUnitSphere() {
        Vector3D m_vP;
        do {
            m_vP = 2.0*Vector3D(drand48(), drand48(), drand48()) - Vector3D(1);
        } while (m_vP.SquaredLength() >= 1.0);
        return m_vP;
    }
};
#endif // MATERIAL_H