systems/time_interval

• C

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  #include <time_interval.h>
  #include <stdio.h>
   
  // This example shows how to run a system at a specified time interval.
   
  void Tick(ecs_iter_t *it) {
      printf("%s\n", ecs_get_name(it->stage, it->system));
  }
   
  int main(int argc, char *argv[]) {
      ecs_world_t *ecs = ecs_init_w_args(argc, argv);
   
      // Create two systems that are running at different time intervals
      ecs_system(ecs, {
          .entity = ecs_entity(ecs, { .name = "Tick" }),
          .phase = EcsOnUpdate,
          .callback = Tick,
          .interval = 1.0  // time in seconds
      });
   
      ecs_system(ecs, {
          .entity = ecs_entity(ecs, { .name = "FastTick" }),
          .phase = EcsOnUpdate,
          .callback = Tick,
          .interval = 0.5
      });
   
      // Run the main loop at 60 FPS
      ecs_set_target_fps(ecs, 60);
   
      while (ecs_progress(ecs, 0)) { }
   
      return ecs_fini(ecs);
   
      // Output
      //  FastTick
      //  Tick
      //  FastTick
      //  FastTick
      //  Tick
      //  FastTick
      //  FastTick
      //  Tick
      //  FastTick
      //  FastTick
      //  ...
  }

• C++

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  #include <time_interval.h>
  #include <iostream>
   
  // This example shows how to run a system at a specified time interval.
   
  void Tick(flecs::iter& it) {
      std::cout << it.system().name() << "\n";
  }
   
  int main(int, char *[]) {
      flecs::world ecs;
   
      ecs.system("Tick")
          .interval(1.0) // time in seconds
          .run(Tick);
   
      ecs.system("FastTick")
          .interval(0.5)
          .run(Tick);
   
      // Run the main loop at 60 FPS
      ecs.set_target_fps(60);
   
      while (ecs.progress()) { }
   
      // Output
      //  FastTick
      //  Tick
      //  FastTick
      //  FastTick
      //  Tick
      //  FastTick
      //  FastTick
      //  Tick
      //  FastTick
      //  FastTick
      //  ...
  }