moved variables into protected to use in derived classes

cpp/particles/p2p/p2p_ghost_collisions.hpp

@@ -45,17 +45,12 @@ class p2p_ghost_collisions
         const double pi  = atan(1.0)*4;
         const double pi2 = atan(1.0)*8;
         // depending on the particle shape, we will be deciding whether particles intersect in different ways
-        enum particle_shape {CYLINDER, SPHERE, DISK};
-        particle_shape current_particle_shape;
-
-        // description for cylinders:
-        double cylinder_width;
-        double cylinder_length;
 
         // description for disks:
         double disk_width;
-        bool isActive;
    protected:        
+       enum particle_shape {CYLINDER, SPHERE, DISK};
+       particle_shape current_particle_shape;
         void add_colliding_pair(partsize_t idx_part1, partsize_t idx_part2)
         {
             // store colliding particle ids in order, to be able to identify pairs more easily
@@ -70,6 +65,12 @@ class p2p_ghost_collisions
             this->collision_pairs_local.push_back(idx_part_small);
             this->collision_pairs_local.push_back(idx_part_big);
         }
+        // description for cylinders:
+        double cylinder_width;
+        double cylinder_length;
+
+        bool isActive;
+        
         bool synchronisation;
         std::vector <partsize_t> collision_pairs_local;
         std::vector <partsize_t> collision_pairs_global;