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   1 #ifndef EXMAN_H_
   2 #define EXMAN_H_
   3
   4 #include <vector>
   5 #include "exhibit.h"
   6 #include "metascene.h"
   7
   8 //! argument to ExhibitSlot::attach
   9 enum ExSlotAttachMode {
  10         EXSLOT_ATTACH_PERMANENT,
  11         EXSLOT_ATTACH_TRANSIENT
  12 };
  13
  14 //! slot which can hold a single exhibit
  15 class ExhibitSlot {
  16 private:
  17         Exhibit *ex;
  18
  19 public:
  20         Quat rotation, grab_rot;
  21         SceneNode node;
  22
  23         ExhibitSlot(Exhibit *ex = 0);
  24         ~ExhibitSlot();
  25
  26         void init(Exhibit *ex);
  27
  28         bool empty() const;
  29         Exhibit *get_exhibit() const;
  30
  31         bool attach_exhibit(Exhibit *ex, ExSlotAttachMode mode = EXSLOT_ATTACH_PERMANENT);
  32         bool detach_exhibit();
  33 };
  34
  35
  36 class ExhibitManager {
  37 private:
  38         std::vector<Exhibit*> items, stashed;
  39         int cur_stashed;
  40         std::vector<ExhibitSlot*> exslots;
  41         // TODO kdtree of slots for quick nearest queries
  42
  43         Scene *own_scn; // scene to manage all exhibits not taken from an existing scene
  44
  45 public:
  46         ExhibitManager();
  47         ~ExhibitManager();
  48
  49         void clear();
  50
  51         void add(Exhibit *ex);
  52         bool remove(Exhibit *ex);
  53
  54         bool load(MetaScene *mscn, const char *fname);
  55
  56         ExSelection select(const Ray &ray) const;
  57         ExSelection select(const Sphere &sph) const;
  58
  59         ExhibitSlot *nearest_empty_slot(const Vec3 &pos, float max_dist = 10) const;
  60
  61         void stash_exhibit(Exhibit *ex);
  62         Exhibit *unstash_exhibit();
  63
  64         void update(float dt = 0.0f);
  65         void draw() const;
  66 };
  67
  68 #endif  // EXMAN_H_