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// Copyright (c) 2013-2020 Vittorio Romeo
// License: Academic Free License ("AFL") v. 3.0
// AFL License page: https://opensource.org/licenses/AFL-3.0
#pragma once
#include <SSVUtils/Core/Common/Frametime.hpp>
namespace hg {
struct SpeedData
{
float _speed;
float _accel;
float _min;
float _max;
float _pingPong;
explicit SpeedData(float speed = 0, float accel = 0.f, float min = 0.f,
float max = 0.f, bool pingPong = false) noexcept
: _speed{speed},
_accel{accel},
_min{min},
_max{max},
_pingPong{pingPong ? -1.f : 1.f}
{}
void update(const ssvu::FT ft) noexcept
{
if(_accel == 0.f)
{
return;
}
_speed += _accel * ft;
if(_speed > _max)
{
_speed = _max;
_accel *= _pingPong;
}
else if(_speed < _min)
{
_speed = _min;
_accel *= _pingPong;
}
}
};
} // namespace hg
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