File content as of revision 3:732f7144ec81:

#include "RadarTimer.h"
#include "Commons.h"

RadarTimer::RadarTimer()
{

}

RadarTimer::RadarTimer(uint32_t scanPeriod)
{
    SetScanPeriod(scanPeriod);
}


void RadarTimer::SetScanPeriod(uint32_t scanPeriod)
{
    _scanPeriod = scanPeriod * 1000;
}

void RadarTimer::Start()
{
#ifndef _SDL_timer_h
   start();
#endif
}

uint32_t RadarTimer::GetRunningTime()
{
#ifdef _SDL_timer_h
    return SDL_GetTicks();
#else
    return read_ms();
#endif
}


void RadarTimer::RegisterScan()
{
    // Lock scan time  
    _runningTime = GetRunningTime();
    
    // Reset scan time after one full turn
    if (_runningTime >= (_lastScanTime + _scanPeriod)) {
        _lastScanTime = _runningTime;
    }
}


float RadarTimer::GetBeamAngle()
{
    float angle = 2 * M_PI * (GetRunningTime() - _lastScanTime) / (float)_scanPeriod;
    if(angle >= (2 * M_PI)) {
        angle -= 2 * M_PI;
    }
    
    return angle;
}