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Add fuzziness to metal materials.

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Faerbit 2020-06-06 23:28:33 +02:00
parent bdb68df296
commit 129854222d
3 changed files with 6 additions and 5 deletions
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2
material.cpp
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@ -11,7 +11,7 @@ bool Lambertian::scatter(const Ray& r_in, const hit_record& rec, Color& attenuat
bool Metal::scatter(const Ray& r_in, const hit_record& rec, Color& attenuation, Ray& scattered) const { bool Metal::scatter(const Ray& r_in, const hit_record& rec, Color& attenuation, Ray& scattered) const {
Vec3 reflected = reflect(unit_vector(r_in.direction()), rec.normal); Vec3 reflected = reflect(unit_vector(r_in.direction()), rec.normal);
scattered = Ray(rec.p, reflected); scattered = Ray(rec.p, reflected + fuzz * random_in_unit_sphere());
attenuation = albedo; attenuation = albedo;
return (dot(scattered.direction(), rec.normal) > 0); return (dot(scattered.direction(), rec.normal) > 0);
} }

3
material.h
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@ -23,11 +23,12 @@ private:
class Metal : public Material { class Metal : public Material {
public: public:
Metal(const Color& a) : albedo(a) {} Metal(const Color& a, double f) : albedo(a), fuzz(f < 1 ? f : 1) {}
virtual bool scatter(const Ray& r_in, const hit_record& rec, Color& attenuation, Ray& scattered) const; virtual bool scatter(const Ray& r_in, const hit_record& rec, Color& attenuation, Ray& scattered) const;
private: private:
Color albedo; Color albedo;
double fuzz;
}; };
#endif // MATERIAL_H #endif // MATERIAL_H

6
wtracer.cpp
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@ -45,10 +45,10 @@ int main() {
world.add(std::make_shared<Sphere>(Point3(0, -100.5, -1), 100));*/ world.add(std::make_shared<Sphere>(Point3(0, -100.5, -1), 100));*/
world.add(std::make_shared<Sphere>(Point3(0, 0, -1), 0.5, std::make_shared<Lambertian>(Color(0.7, 0.3, 0.3)))); world.add(std::make_shared<Sphere>(Point3(0, 0, -1), 0.5, std::make_shared<Lambertian>(Color(0.7, 0.3, 0.3))));
world.add(std::make_shared<Sphere>(Point3(0, -100.5, -1), 100, std::make_shared<Lambertian>(Color(0.8, 0.8, 0.8)))); world.add(std::make_shared<Sphere>(Point3(0, -100.5, -1), 100, std::make_shared<Lambertian>(Color(0.8, 0.8, 0.0))));
world.add(std::make_shared<Sphere>(Point3(1, 0, -1), 0.5, std::make_shared<Metal>(Color(0.8, 0.6, 0.2)))); world.add(std::make_shared<Sphere>(Point3(1, 0, -1), 0.5, std::make_shared<Metal>(Color(0.8, 0.6, 0.2), 0.3)));
world.add(std::make_shared<Sphere>(Point3(-1, 0, -1), 0.5, std::make_shared<Metal>(Color(0.8, 0.8, 0.8)))); world.add(std::make_shared<Sphere>(Point3(-1, 0, -1), 0.5, std::make_shared<Metal>(Color(0.8, 0.8, 0.8), 1.0)));
Camera cam; Camera cam;