Method OnKeysChanged

trinity/Curves/Tr2CurveScalar.cpp:282–347

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// --------------------------------------------------------------------------------
void Tr2CurveScalar::OnKeysChanged()
{
	std::stable_sort(
		m_keys.begin(),
		m_keys.end(),
		[]( const Tr2CurveScalarKey& k0, const Tr2CurveScalarKey& k1 ) { return k0.m_time < k1.m_time; } );

	for( size_t i = 0; i < m_keys.size(); ++i )
	{
		auto& k = m_keys[i];
		switch( k.m_tangentType )
		{
		case Tr2CurveTangentType::AUTO_CLAMP:
			if( i == 0 )
			{
				k.m_leftTangent = k.m_rightTangent = 0;
			}
			else if( i + 1 == m_keys.size() )
			{
				k.m_leftTangent = k.m_rightTangent = 0;
			}
			else
			{
				float tangent = GetAutoClamppedTangent(
					m_keys[i - 1].m_time,
					m_keys[i - 1].m_value,
					k.m_time,
					k.m_value,
					m_keys
						[i + 1]
							.m_time,
					m_keys[i + 1].m_value );

				k.m_leftTangent = tangent;
				k.m_rightTangent = tangent;
			}
			break;
		case Tr2CurveTangentType::AUTO:
			if( i == 0 )
			{
				k.m_leftTangent = k.m_rightTangent = 0;
			}
			else if( i + 1 == m_keys.size() )
			{
				k.m_leftTangent = k.m_rightTangent = 0;
			}
			else
			{
				float tangent = GetAutoTangent(
					m_keys[i - 1].m_time,
					m_keys[i - 1].m_value,
					k.m_time,
					k.m_value,
					m_keys[i + 1].m_time,
					m_keys[i + 1].m_value );

				k.m_leftTangent = tangent;
				k.m_rightTangent = tangent;