.. _program_listing_file_blam_tick.cpp:

Program Listing for File tick.cpp
=================================

|exhale_lsh| :ref:`Return to documentation for file <file_blam_tick.cpp>` (``blam\tick.cpp``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   // Tick Management                            //
   // Controls and manages engine tick rate     //
   // ---------------------------------------- //
   // Copyright (c) Elaztek Studios 2013-2019 //
   
   #include "core.h"
   
   #include <iostream>
   #include <string>
   
   //TODO: Add this to matg
   uint64_t max_tickrate = 40; 
   uint64_t ticks_this_second = 0; 
   LARGE_INTEGER last_second_time;
   
   void doTick();
   
   uint64_t Blam::Tick::getCurrentTickRate()
   {
       //TODO: calculate average TPS
       //we're gonna return ticks this second in the meantime
   
       return ticks_this_second;
   }
   
   void Blam::Tick::updateLastTimestamp()
   {
       QueryPerformanceCounter(&last_second_time);
   }
   
   //check if a second has passed in order to reset tick counter
   bool hasSecondPassed()
   {
       LARGE_INTEGER elapsed_microseconds; //elapsed time
       LARGE_INTEGER current_time; //the new time
       LARGE_INTEGER frequency;
   
       QueryPerformanceFrequency(&frequency);
       QueryPerformanceCounter(&current_time);
   
       elapsed_microseconds.QuadPart = current_time.QuadPart - last_second_time.QuadPart;
   
   
       elapsed_microseconds.QuadPart *= 1000000;
       elapsed_microseconds.QuadPart /= frequency.QuadPart;
   
       if (elapsed_microseconds.QuadPart >= 1000000)
       {
           return true;
       }
       else
       {
           return false;
       }
   }
   
   
   void Blam::Tick::tick()
   {
       //if a second has passed, reset this second's tick counter and last second timestamp
       if (hasSecondPassed())
       {
           ticks_this_second = 0;
           Blam::Tick::updateLastTimestamp();
       }
   
       if (max_tickrate > ticks_this_second)
       {
           doTick();
           ticks_this_second += 1;
       }
   }
   
   //put things you want to run based on game tick here
   void doTick()
   {
       std::cout << "doTick() was called (" + std::to_string(ticks_this_second) + ")" << std::endl;
   }