class AliFMDRing: public TNamed

 Constructor

 Parameters:
    id      Type of ring (either 'I' or 'O')

 Initialize

 All derived quantities are calculated here.

 Get the i'th vertex of polygon shape

 the polygon shape describes the shape of the rings' sensors

 Parameters:
     i    The vertex number to get (from 0 to 5)

 Get the i'th vertex of polygon shape

 the polygon shape describes the shape of the rings' sensors

 Parameters:
     i    The vertex number to get (from 0 to 5)

 Get the i'th vertex of polygon shape

 the polygon shape describes the shape of the rings' hybrid cards

 Parameters:
     i    The vertex number to get (from 0 to 5)

 Get the i'th vertex of polygon shape

 The feet are attached to the hybrid cards

 Parameters:
     i    The foot number to get (from 0 to 2)

 Return the nominal strip radius

 Parameter
   strip    Strip number (0-511 for inners, 0-255 for outers)

 Get the total depth of a module (sensor + hybrid card)

 The depth is the sum of

   The silicon thickness
   The thickness of spacers between the silicon and hybrid
   The thickness of the hybrid PCB
   The thickness of the copper layer in the PCB
   The thickness of the chip layer in the PCB
   The height of the legs

 Get the full depth of this ring, including the honeycomb,
 digitizer and card.

 Translate detector coordinates (this,sector,strip) to global
 coordinates (x,y,z)

 Parameters
    sector        Sector number in this ring
    strip         Strip number in this ring
    x             On return, the global X coordinate
    y             On return, the global Y coordinate
    z             On return, the z coordinate in the ring plane

 The ring plane is the plane half way between the two sensor
 layers.

 Translate global coordinates (x,y,z) to detector coordinates
 (this,sector,strip)

  Parameters:
     x       Global x coordinate
     y       Global y coordinate
     z       Global y coordinate
     sector  On return, the sector number in this ring
     strip   On return, the strip number in this ring

 Get the length of a strip

 Parameters:
   strip     Strip number (0-511 for inners, 0-255 for outers)

 Get the basic strip length

 Parameters:
   strip    Strip number

   * DTOR

   *
   * @param x Value of The Id of this ring type

   *
   * @param x Value of With of bonding pad on sensor

   *
   * @param x Value of Size of wafer the sensor was made from

   *
   * @param x Value of Thickness of sensor

   *
   * @param x Value of Lower radius of ring

   *
   * @param x Value of Upper radius of ring

   *
   * @param x Value of Opening angle of the silicon wafers

   *
   * @param x Value of Number of strips

   *
   * @param x Value of How far the ring extends beyond the z value given.

   *
   * @param x Value of Radius of support legs

   *
   * @param x Value of Radius of support legs

   *
   * @param x Value of Radius of support legs

   *
   * @param x Value of Staggering offset

   *
   * @param x Value of Thickness of print board

   *
   * @param x Value of Thickness of copper on print board

   *
   * @param x Value of Thickness of chip on print board

   *
   * @param x Value of spacing between si and PCB

   *
   * @param x Thickness of honeycomb plate

   *
   * @param x Thickness of aluminium of honeycomb

   *
   * @return The Id of this ring type

   *
   * @return With of bonding pad on sensor

   *
   * @return Size of wafer the sensor was made from

   *
   * @return Thickness of sensor

   *
   * @return Minimum r for an active strip

   *
   * @return Maximum r for an active strip

   *
   * @return Lower radius of ring

   *
   * @return Upper radius of ring

   *
   * @return Opening angle of the sector (half that of silicon wafers)

   *
   * @return Number of strips

   *
   * @return Number of sectors

   *
   * @return Number of modules (2 sectors per module)

   *
   * @return How far the ring extends beyond the z value given.

   *
   * @return Radius of support legs

   *
   * @return Radius of support legs

   *
   * @return Radius of support legs

   *
   * @return Staggering offset

   *
   * @return Thickness of print board

   *
   * @return Thickness copper of print board

   *
   * @return Thickness chip of print board

   *
   * @return Value of spacing between si and PCB

   *
   * @return Thickness of honeycomb plate

   *
   * @return Thickness of aluminium of honeycomb

   *
   * @return The strip pitch

   * Get the inner radius of the digitizer cards
   *
   * @return The inner radius of the digitizer cards

   * Get the outer radius of the digitizer cards
   *
   * @return The outer radius of the digitizer cards

   *
   * @return Thickness of print board

   *
   * @return Thickness copper of print board

   *
   * @return Thickness chip of print board

   *
   * @return List of verticies

   *
   * @return Number of verticies

   *
   * @return List of verticies

   *
   * @return List of verticies

   * Get a list of feet positions
   *
   *
   * @return List TVector2 of feet positions on hybrid card

   * Get the number of feet positions
   *
   *
   * @return Number of feet positions