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#include "angle_interpolation.hpp"
#include "controller.hpp"
#include "../geometry/angles.hpp"
#include "../base/logging.hpp"
namespace anim
{
AngleInterpolation::AngleInterpolation(double start,
double end,
double speed,
double & out)
: m_startAngle(start),
m_outAngle(out)
{
m_speed = speed;
m_startTime = 0;
m_dist = ang::GetShortestDistance(start, end);
m_curAngle = m_startAngle;
m_endAngle = m_startAngle + m_dist;
m_interval = fabs(m_dist) / (2 * math::pi) * m_speed;
}
void AngleInterpolation::OnStart(double ts)
{
m_startTime = ts;
m_outAngle = m_startAngle;
Task::OnStart(ts);
}
void AngleInterpolation::OnStep(double ts)
{
if (!IsRunning())
return;
if (ts - m_startTime >= m_interval)
{
End();
return;
}
double elapsedSec = ts - m_startTime;
m_curAngle = m_outAngle = m_startAngle + m_dist * elapsedSec / m_interval;
Task::OnStep(ts);
}
void AngleInterpolation::OnEnd(double ts)
{
// ensuring that the final value was reached
m_outAngle = m_endAngle;
Task::OnEnd(ts);
}
double AngleInterpolation::EndAngle() const
{
return m_endAngle;
}
void AngleInterpolation::SetEndAngle(double val)
{
m_startTime = GetController()->GetCurrentTime();
m_startAngle = m_curAngle;
m_dist = ang::GetShortestDistance(m_startAngle, val);
m_endAngle = m_startAngle + m_dist;
m_interval = fabs(m_dist) / (2 * math::pi) * m_speed;
}
}
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