solution for 3.1a)

[MicroTrace.git] / PerspectiveCamera.hxx

diff --git a/PerspectiveCamera.hxx b/PerspectiveCamera.hxx
index 8178087..e171d5b 100644 (file)
--- a/PerspectiveCamera.hxx
+++ b/PerspectiveCamera.hxx
@@ -15,7 +15,7 @@ public:
                    );
   ~PerspectiveCamera();
 
-  virtual bool InitRay(float x, float y, Ray &ray);
+  virtual bool InitRay(float x, float y, Ray &ray) const;
 
 private:
   //! hidden constructors to prevent misuse. If you need those at some point, just make them public and implement them properly!