Invert Pan-Azimuth (up means left)

It's a well established convention that pan y-axis automation,
or vertical uses (top) +1 for left.

This special cases rotary knobs (and horizontal sliders) to retain
a clockwise movement (or movement to the right) for panning to the
right.

1 files changed, 9 insertions, 2 deletions

diff --git a/libs/pbd/pbd/controllable.h b/libs/pbd/pbd/controllable.h
index 62127fb048..a83a42bcb3 100644
--- a/libs/pbd/pbd/controllable.h
+++ b/libs/pbd/pbd/controllable.h
@@ -119,8 +119,15 @@ public:
 	virtual double get_save_value () const { return get_value(); }
 
 	/** Conversions between `internal', 'interface', and 'user' values */
-	virtual double internal_to_interface (double i) const {return  (i-lower())/(upper() - lower());}  //by default, the interface range is just a linear interpolation between lower and upper values
-	virtual double interface_to_internal (double i) const {return lower() + i*(upper() - lower());}
+	virtual double internal_to_interface (double i, bool rotary = false) const {
+		/* by default, the interface range is just a linear
+		 * interpolation between lower and upper values */
+		return  (i-lower())/(upper() - lower());
+	}
+
+	virtual double interface_to_internal (double i, bool rotary = false) const {
+		return lower() + i*(upper() - lower());
+	}
 
 	/** Get and Set `interface' value  (typically, fraction of knob travel) */
 	virtual float get_interface() const { return (internal_to_interface(get_value())); }