/********************************************************************************
* ReactPhysics3D physics library, http://www.reactphysics3d.com                 *
* Copyright (c) 2010-2020 Daniel Chappuis                                       *
*********************************************************************************
*                                                                               *
* This software is provided 'as-is', without any express or implied warranty.   *
* In no event will the authors be held liable for any damages arising from the  *
* use of this software.                                                         *
*                                                                               *
* Permission is granted to anyone to use this software for any purpose,         *
* including commercial applications, and to alter it and redistribute it        *
* freely, subject to the following restrictions:                                *
*                                                                               *
* 1. The origin of this software must not be misrepresented; you must not claim *
*    that you wrote the original software. If you use this software in a        *
*    product, an acknowledgment in the product documentation would be           *
*    appreciated but is not required.                                           *
*                                                                               *
* 2. Altered source versions must be plainly marked as such, and must not be    *
*    misrepresented as being the original software.                             *
*                                                                               *
* 3. This notice may not be removed or altered from any source distribution.    *
*                                                                               *
********************************************************************************/

// Libraries
#include <reactphysics3d/engine/Timer.h>

// We want to use the ReactPhysics3D namespace
using namespace reactphysics3d;

// Constructor
Timer::Timer(double timeStep) : mTimeStep(timeStep), mLastUpdateTime(0), mDeltaTime(0), mIsRunning(false) {
    assert(timeStep > 0.0);
}

// Return the current time of the system in seconds
long double Timer::getCurrentSystemTime() {

    #if defined(WINDOWS_OS)
        LARGE_INTEGER ticksPerSecond;
        LARGE_INTEGER ticks;
        QueryPerformanceFrequency(&ticksPerSecond);
        QueryPerformanceCounter(&ticks);
        return ((long double)(ticks.QuadPart) / (long double)(ticksPerSecond.QuadPart));
    #else
        // Initialize the lastUpdateTime with the current time in seconds
        timeval timeValue;
        gettimeofday(&timeValue, nullptr);
        return (timeValue.tv_sec + (timeValue.tv_usec / 1000000.0));
    #endif
}









