Manual pages | Cast3M

$$$$ @FRENET  NOTICE  CHAT      11/09/12    21:16:19     7124           
                                             DATE     11/09/12


          CETTE PROCEDURE A ETE MISE GRACIEUSEMENT
         A DISPOSITION DE LA COMMUNAUTE  CASTEM2000
             PAR P. LIBEYRE ( CEA/DSM/DRFC )



      Procedure @FRENET                      Voir aussi : @COUTOR1
      -----------------                                   @COUTOR2   
                                                          @ORTHO1   
      CHT CHN CHB = @FRENET LIG1 ('TRACE') (OEIL1);



     Description :
     _____________

      This procedure calculates Frenet basis along a line.

      Contents :
      __________

      LIG1 : MAILLAGE type object which must be composed of
             SEG2 or SEG3 type elements

      TRACE : key word indicating that Frenet basis must be 
              plotted

      OEIL1: POINT type object indicating the plot viewpoint for
             a 3D-line  

      CHT  : field by points of the tangent unitary vector
             (CHPOINT type) of components 'TX', 'TY', 'TZ' 

      CHN  : field by points of the normal unitary vector
             (CHPOINT type) of components 'NX', 'NY', 'NZ' 

      CHB  : field by points of the binormal unitary vector
             (CHPOINT type) of components 'BX', 'BY', 'BZ' 


      Note 1 :
      _________

      In 2 dimensions, the value of the components BX and BY of CHB 
      are null at any point.


      Note 2 :
      ________

      The direction of the tangent is that of the description of the
      line. The direction of the basis (t,n,b) is direct.


      Note 3 :
      ________

      It is required that LIG1 include at least 5 elements.

      Note 4 :
      ___________

      If TRACE is not specified, the basis will not be plotted.