Material is now purely an interface

RayTracer/material/Material.cpp

-#include "Material.h"
-
-namespace material {
-
-util::Vec3 rand_vec3() {
-	return util::Vec3(dis(gen), dis(gen), dis(gen));
-}
-
-bool in_circle(const util::Vec3& v) {
-	return v.length() <= 1;
-}
-
-util::Vec3 rand_vec3_in_circle(float r) {
-	util::Vec3 result;
-	do {
-		result = rand_vec3();
-	} while (!in_circle(result));
-	return result * r;
-}
-}  // namespace material
\ No newline at end of file

RayTracer/material/Material.h

@@ -3,6 +3,7 @@
 #include <random>
 
 #include "../sampling/Sampler.h"
+#include "../tools/Vec3.h"
 
 namespace material {
 
@@ -14,11 +15,4 @@ class Material {
 	                               const util::Vec3& n) const = 0;
 	virtual bool scatter() const = 0;
 };
-
-static std::random_device rd;
-static std::mt19937 gen(rd());
-static std::uniform_real_distribution<> dis(-1.0, 1.0);
-util::Vec3 rand_vec3();
-bool in_circle(const util::Vec3& v);
-util::Vec3 rand_vec3_in_circle(float r);
 }  // namespace material