source/game/transformpropagator.h

   1 #ifndef MSP_GAME_TRANSFORMPROPAGATOR_H_
   2 #define MSP_GAME_TRANSFORMPROPAGATOR_H_
   3
   4 #include "eventobserver.h"
   5 #include "handle.h"
   6 #include "system.h"
   7
   8 namespace Msp::Game {
   9
  10 class Entity;
  11 class Transform;
  12
  13 class TransformPropagator: public System
  14 {
  15 private:
  16         struct ParentedTransform
  17         {
  18                 Handle<Transform> transform;
  19                 Handle<Transform> parent;
  20         };
  21
  22         EventObserver observer;
  23         std::vector<ParentedTransform> transforms;
  24         bool transforms_dirty = true;
  25
  26 public:
  27         TransformPropagator(Stage &);
  28
  29         void tick(Time::TimeDelta) override;
  30
  31 private:
  32         void rebuild_transform_order();
  33         void rebuild_transform_order(Handle<Entity>, Handle<Transform>);
  34 };
  35
  36 } // namespace Msp::Game
  37
  38 #endif