Added scaling transform for envelope

Source/PluginProcessor.cpp

@@ -82,6 +82,7 @@ PaulstretchpluginAudioProcessor::PaulstretchpluginAudioProcessor()
 	m_playposinfo.timeInSeconds = 0.0;
 	
     m_free_filter_envelope = std::make_shared<breakpoint_envelope>();
+	m_free_filter_envelope->SetName("Free filter");
 	m_free_filter_envelope->AddNode({ 0.0,0.75 });
 	m_free_filter_envelope->AddNode({ 1.0,0.75 });
 	m_free_filter_envelope->set_reset_nodes(m_free_filter_envelope->get_all_nodes());

Source/envelope_component.cpp

@@ -321,6 +321,10 @@ bool EnvelopeComponent::keyPressed(const KeyPress & ev)
 		m_envelope->m_transform_y_shift += 0.01;
 	if (ev == 'D')
 		m_envelope->m_transform_y_shift -= 0.01;
+	if (ev == 'R')
+		m_envelope->m_transform_y_scale += 0.05;
+	if (ev == 'F')
+		m_envelope->m_transform_y_scale -= 0.05;
 	repaint();
 
 	if (ev == KeyPress::deleteKey)

Source/jcdp_envelope.h

@@ -561,6 +561,7 @@ public:
 	String m_script;
 	double m_transform_x_shift = 0.0;
 	double m_transform_y_shift = 0.0;
+	double m_transform_y_scale = 1.0;
 	inline double getTransformedValue(double x)
 	{
 		if (isTransformed() == false)
@@ -568,11 +569,15 @@ public:
 		double temp = fmod(x - m_transform_x_shift, 1.0);
 		if (temp < 0.0)
 			temp += 1.0;
-		return jlimit(0.0,1.0,GetInterpolatedNodeValue(temp) + m_transform_y_shift);
+		double v = GetInterpolatedNodeValue(temp);
+		double diff = 0.5 - v;
+		double scaled = 0.5 - m_transform_y_scale * diff;
+		double shifted = scaled + m_transform_y_shift;
+		return jlimit(0.0,1.0,shifted);
 	}
 	bool isTransformed() const
 	{
-		return m_transform_x_shift != 0.0 || m_transform_y_shift != 0.0;
+		return m_transform_x_shift != 0.0 || m_transform_y_shift != 0.0 || m_transform_y_scale!=1.0;
 	}
 private:
     nodes_t m_nodes;