added missing const

engine/inc/physics/ray.hpp

@@ -49,7 +49,7 @@ class Ray {
    * @return Vec4 point of intersection
    */
   bool intersectBox(const Vec4& minCorner, const Vec4& maxCorner,
-                    float& distance) const;
+                    const float& distance) const;
 
   /** Returns inverse direction */
   Vec4 invDir() const;

engine/src/physics/ray.cpp

@@ -32,7 +32,7 @@ float Ray::distanceToPoint(const Vec4& point) const {
 }
 
 bool Ray::intersectBox(const Vec4& minCorner, const Vec4& maxCorner,
-                       float& distance) const {
+                       const float& distance) const {
   auto inv = invDir();
   inv.normalize();