computation of phi max as in the paper

openglcanvas.cpp

@@ -547,7 +547,7 @@ void OpenGLCanvas::define_triangle_indices(unsigned int * indices, int m, int n)
 int OpenGLCanvas::compute_auto_fov_max(int new_fov){
         if(new_fov<60)
             return 60;
-        if(new_fov>180)
+        if(new_fov>179)
             return 1;
         //if(new_fov>60)
             return (90-new_fov/2);