Android NDK Beginner's Guide - Second Edition

Time for action – animating graphics with a timer

Let's animate the game.

1. Create jni/TimeManager.hpp with the time.h manager and define the following methods:
   • reset() to initialize the manager.
   • update() to measure game step duration.
   • elapsed() and elapsedTotal() to get game step duration and game duration. They are going to allow the adaptation of the application behavior to the device speed.
   • now() is a utility method to recompute the current time.

   Define the following member variables:

   • mFirstTime and mLastTime to save a time checkpoint in order to compute elapsed() and elapsedTotal()
   • mElapsed and mElapsedTotal to save computed time measures

     #ifndef _PACKT_TIMEMANAGER_HPP_ #define _PACKT_TIMEMANAGER_HPP_ #include "Types.hpp" #include <ctime> class TimeManager ...