class Exhibit;
class ExhibitPriv;
+class Scene;
enum {
EXSEL_RAY = 1,
Exhibit(const Exhibit&) = delete;
Exhibit &operator =(const Exhibit &) = delete;
+ virtual void set_node(SceneNode *node);
+
virtual ExSelection select(const Ray &ray) const;
virtual ExSelection select(const Sphere &sph) const;