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Expanded description
Topic Description
Name 
arrowback
Synopsis 
/infobank/programs/plt/naved/arrowback.for
Description 
  Subroutine to draw an arrow for NAVED.
Author 
  Clint Steele
Usage 
  "a" = argument, "r" = referenced, "s" = set

  
  call arrowback                            (with the following arguments)
         PointNumber                 [variable i*4 r]
         Direction                   [variable char*5 r]
         TekWest                     [variable i*4 a]
         TekEast                     [variable i*4 a]
         TekSouth                    [variable i*4 a]
         TekNorth                    [variable i*4 a]
         WindowNumber                [variable i*4 r]
Subroutines 
  dwindo              (external Tektronix)          

  twindo              (external Tektronix)          
  csedst              (internal)                    
  movea               (external Tektronix)          
  rrotat              (external Tektronix)          
  drawr               (external Tektronix)
Limitations 
  NOTICE:

    LOCAL VARIABLES SET AND PASSED AS ARGUMENTS BUT NOT OTHERWISE REFERENCED:
      distance
Calls 
 call dwindo (LongWestWindow (WindowNumber), 
*             LongEastWindow (WindowNumber),
*             LatSouthWindow (WindowNumber), 
*             LatNorthWindow (WindowNumber))

 call twindo (TekWest, TekEast, TekSouth, TekNorth) 
         call csedst (Course,
*                     Distance,
*                     7, 
*                     LatBack  (PointNumber), 
*                     LongBack (PointNumber), 
*                     LatBack  (PointNumber + 1), 
*                     LongBack (PointNumber + 1) )
         call movea (LongBack  (PointNumber),
*                    LatBack   (PointNumber) )
         call rrotat (360.0 - Course)
         call drawr (-10. * ArrowSize,               0.)
         call drawr ( 10. * ArrowSize,  40. * ArrowSize)
         call drawr ( 10. * ArrowSize, -40. * ArrowSize)
         call drawr (-10. * ArrowSize,               0.)
         call rrotat (0.)
         call csedst (Course,
*                     Distance,
*                     7, 
*                     LatBack  (PointNumber - 1), 
*                     LongBack (PointNumber - 1), 
*                     LatBack  (PointNumber), 
*                     LongBack (PointNumber) )
         call movea (LongBack (PointNumber),
*                    LatBack  (PointNumber) )
         call rrotat (360.0 - Course)
         call drawr (-10. * ArrowSize, -40. * ArrowSize)
         call drawr ( 20. * ArrowSize,               0.)
         call drawr (-10. * ArrowSize,  40. * ArrowSize)
         call rrotat (0.)

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URL: /infobank/programs/plt/naved/arrowback.doc.html
Maintainer: Clint Steele
Last modified: Fri Oct 11 03:10:36 PDT 2002  (wcs)