source/game/director.cpp

   1 #include "director.h"
   2 #include <stdexcept>
   3 #include <msp/time/utils.h>
   4 #include "stage.h"
   5
   6 using namespace std;
   7
   8 namespace Msp::Game {
   9
  10 Stage &Director::create_stage()
  11 {
  12         stages.emplace_back(std::make_unique<Stage>());
  13         return *stages.back();
  14 }
  15
  16 void Director::tick()
  17 {
  18         Time::TimeStamp now = Time::now();
  19         Time::TimeDelta dt = (last_tick ? now-last_tick : Time::zero);
  20         last_tick = now;
  21
  22         backlog = min(backlog+dt, stepsize*max_backlog_steps);
  23         for(unsigned i=0; (i<max_steps_per_frame && backlog>=stepsize); ++i, backlog-=stepsize)
  24                 for(const auto &s: stages)
  25                         s->tick(stepsize);
  26 }
  27
  28 } // namespace Msp::Game