/**
* Calculate strides array
* @return array
*/
public function calculate()
{
if (!$this->Trackdata->has(Trackdata\Entity::TIME) || !$this->Trackdata->has(Trackdata\Entity::DISTANCE) || !$this->Trackdata->has(Trackdata\Entity::CADENCE)) {
return [];
}
$Time = $this->Trackdata->time();
$Distance = $this->Trackdata->distance();
$Cadence = $this->Trackdata->cadence();
$Size = $this->Trackdata->num();
$this->Strides[] = $Cadence[0] > 0 && $Time[0] > 0 ? round($Distance[0] * 1000 * 100 / ($Cadence[0] * 2 / 60 * $Time[0])) : 0;
for ($i = 1; $i < $Size; ++$i) {
$this->Strides[] = $Cadence[$i] > 0 && $Time[$i] - $Time[$i - 1] > 0 ? round(($Distance[$i] - $Distance[$i - 1]) * 1000 * 100 / ($Cadence[$i] * 2 / 60 * ($Time[$i] - $Time[$i - 1]))) : 0;
}
return $this->Strides;
}
