#include "moversine.hpp"
#if !defined(_GNU_SOURCE)
#	define _GNU_SOURCE
#endif
#include <cmath>

namespace cloonel {
	///--------------------------------------------------------------------------
	///--------------------------------------------------------------------------
	MoverSine::MoverSine() :
		MoverRelative(),
		m_alpha(0.0f),
		m_power(1.0f)
	{
	}

	///--------------------------------------------------------------------------
	///--------------------------------------------------------------------------
	float2 MoverSine::GetOffset() const {
		return float2(0.0f, std::abs(std::sin(m_alpha)) * m_power);
	}

	///--------------------------------------------------------------------------
	///--------------------------------------------------------------------------
	void MoverSine::ApplyMotion (float parDelta) {
		const float pitwo = static_cast<float>(M_PI) * 2.0f;
		m_alpha += parDelta * 2.6f;
		if (m_alpha >= pitwo)
			m_alpha -= pitwo;
	}
} //namespace cloonel