Method ResetZoomEnvelope

src/game/editor/editor.cpp:4357–4409

}

void CEditor::ResetZoomEnvelope(const std::shared_ptr<CEnvelope> &pEnvelope, int ActiveChannels)
{
	auto [Bottom, Top] = pEnvelope->GetValueRange(ActiveChannels);
	float EndTime = pEnvelope->EndTime();
	float ValueRange = absolute(Top - Bottom);

	if(ValueRange < m_ZoomEnvelopeY.GetMinValue())
	{
		// Set view to some sane default if range is too small
		m_OffsetEnvelopeY = 0.5f - ValueRange / m_ZoomEnvelopeY.GetMinValue() / 2.0f - Bottom / m_ZoomEnvelopeY.GetMinValue();
		m_ZoomEnvelopeY.SetValueInstant(m_ZoomEnvelopeY.GetMinValue());
	}
	else if(ValueRange > m_ZoomEnvelopeY.GetMaxValue())
	{
		m_OffsetEnvelopeY = -Bottom / m_ZoomEnvelopeY.GetMaxValue();
		m_ZoomEnvelopeY.SetValueInstant(m_ZoomEnvelopeY.GetMaxValue());
	}
	else
	{
		// calculate biggest possible spacing
		float SpacingFactor = minimum(1.25f, m_ZoomEnvelopeY.GetMaxValue() / ValueRange);
		m_ZoomEnvelopeY.SetValueInstant(SpacingFactor * ValueRange);
		float Space = 1.0f / SpacingFactor;
		float Spacing = (1.0f - Space) / 2.0f;

		if(Top >= 0 && Bottom >= 0)
			m_OffsetEnvelopeY = Spacing - Bottom / m_ZoomEnvelopeY.GetValue();
		else if(Top <= 0 && Bottom <= 0)
			m_OffsetEnvelopeY = Spacing - Bottom / m_ZoomEnvelopeY.GetValue();
		else
			m_OffsetEnvelopeY = Spacing + Space * absolute(Bottom) / ValueRange;
	}

	if(EndTime < m_ZoomEnvelopeX.GetMinValue())
	{
		m_OffsetEnvelopeX = 0.5f - EndTime / m_ZoomEnvelopeX.GetMinValue();
		m_ZoomEnvelopeX.SetValueInstant(m_ZoomEnvelopeX.GetMinValue());
	}
	else if(EndTime > m_ZoomEnvelopeX.GetMaxValue())
	{
		m_OffsetEnvelopeX = 0.0f;
		m_ZoomEnvelopeX.SetValueInstant(m_ZoomEnvelopeX.GetMaxValue());
	}
	else
	{
		float SpacingFactor = minimum(1.25f, m_ZoomEnvelopeX.GetMaxValue() / EndTime);
		m_ZoomEnvelopeX.SetValueInstant(SpacingFactor * EndTime);
		float Space = 1.0f / SpacingFactor;
		float Spacing = (1.0f - Space) / 2.0f;

		m_OffsetEnvelopeX = Spacing;
	}
}

float CEditor::ScreenToEnvelopeX(const CUIRect &View, float x) const
{