More photons.

kd_tree.hpp

@@ -21,6 +21,10 @@ struct Vec3
   Vec3(float _x = 0.0f, float _y = 0.0f, float _z = 0.0f): x(_x), y(_y), z(_z) { }
 
   Vec3(const Vec3 & other) = default;
+
+  glm::vec3 toVec3() {
+    return glm::vec3(x, y, z);
+  }
   
   inline bool equalFloat(const float x, const float y)
   {