PlotSailClock2D:

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   Plot clock angle and relevant vectors in the 2D clock plane.
   This plane is perpendicular to the sun vector. The clock angle is
   measured from the reference frame y axis.

   This plot can account for the fact that the force vector may not be in the 
   plane of the sail normal/sun flux vector (for an asymmetric sail).
   If the reference quaternion is known it can be passed in directly.

   See also QSail, PlotSailForce2D

   Since version 7.
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   Form:
   PlotSailClock2D( f, n, a, s, r, v, c )
   PlotSailClock2D( f, n, a, q )
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   ------
   Inputs
   ------
   f              (3,1)  Force vector
   n              (3,1)  Sail front normal vector
   a              (1,1)  Axes handle (optional)
   s              (3,1)  Unit vector to sun (inertial)
   r              (3,1)  Position vector
   v              (3,1)  Velocity vector
   c              (1,1)  Sign convention

   -------
   Outputs
   -------
   cone              (1,1)  Cone angle
   clock             (1,1)  Clock angle

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Children:

Common: Graphics/AnglePatch
Common: Graphics/Circle
Common: Graphics/NewFig
Common: Graphics/TitleS
Common: Quaternion/QTForm
Math: Linear/Cross
Math: Linear/Dot
Math: Linear/Unit
Sail: Coordinates/QSail
Sail: Coordinates/UToConeClock
Sail: Graphics/SailDefaultColors
Sail: Graphics/SailPatchVertices