From 8da53c5f262b09756e1a93257cdcd5be25807839 Mon Sep 17 00:00:00 2001
From: ladevieq <ladevie.quentin@gmail.com>
Date: Mon, 21 Dec 2020 23:13:25 +0100
Subject: Movable and rotatable camera + dielectric materials

---
 include/camera.hpp     |  5 ++---
 include/dielectric.hpp | 18 ++++++++++++++++++
 include/rt.hpp         |  1 +
 include/vec3.hpp       |  2 ++
 4 files changed, 23 insertions(+), 3 deletions(-)
 create mode 100644 include/dielectric.hpp

(limited to 'include')

diff --git a/include/camera.hpp b/include/camera.hpp
index 82f7155..0b3d20e 100644
--- a/include/camera.hpp
+++ b/include/camera.hpp
@@ -1,16 +1,15 @@
 #ifndef __CAMERA_HPP_
 #define __CAMERA_HPP_
 
-#include "rt.hpp"
+#include "ray.hpp"
 
 class camera {
     public:
-        camera(point3 position, double aspect_ratio, double focal_length);
+        camera(point3 position, point3 target, double v_fov, double aspect_ratio);
 
         ray get_ray(double u, double v) const;
 
         point3 position;
-        double focal_length;
 
         vec3 horizontal;
         vec3 vertical;
diff --git a/include/dielectric.hpp b/include/dielectric.hpp
new file mode 100644
index 0000000..91f1541
--- /dev/null
+++ b/include/dielectric.hpp
@@ -0,0 +1,18 @@
+#ifndef __DIELECTRIC_HPP_
+#define __DIELECTRIC_HPP_
+
+#include "material.hpp"
+
+class dielectric : public material {
+    public:
+        dielectric(double index_of_refraction);
+
+        virtual bool scatter(const ray& r, const struct hit_info& info, color& attenuation, ray& scattered) const;
+
+        double ior;
+
+    private:
+        static double reflectance(double cosine, double ref_idx);
+};
+
+#endif // !__DIELECTRIC_HPP_
diff --git a/include/rt.hpp b/include/rt.hpp
index 2cf3ce2..1294232 100644
--- a/include/rt.hpp
+++ b/include/rt.hpp
@@ -34,5 +34,6 @@ inline double clamp(double x, double min, double max) {
 #include "material.hpp"
 #include "lambertian.hpp"
 #include "metal.hpp"
+#include "dielectric.hpp"
 
 #endif // !__RT_HPP_
diff --git a/include/vec3.hpp b/include/vec3.hpp
index 317f99b..7d38472 100644
--- a/include/vec3.hpp
+++ b/include/vec3.hpp
@@ -53,6 +53,8 @@ vec3 operator/(vec3 u, double scale);
 
 vec3 reflect(vec3 v, vec3 n);
 
+vec3 refract(const vec3& uv, const vec3& n, double etai_over_etat);
+
 std::ostream& operator<<(std::ostream& out, vec3 vec);
 
 vec3 random_in_unit_sphere();
-- 
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