Manual pages | Cast3M

$$$$ LIGN     NOTICE  CHAT      11/09/12    21:17:03     7124           
                                             DATE     11/09/12

    Operateur LIGN                           Voir aussi : CERC CER3   
    --------------                                        DROI ROTA   
                                                          VOLU    
    GEO1 = LIGN  'ROTA' ....     voir cas 1
                 'TRAN' ....     voir cas 2
                


    (C is also possible)

-----------------------------------------------
| Case 1 : Construction of an arc of a circle |
-----------------------------------------------

    GEO1 = LIGN (N1) CENTRE POINT1 (NORMAL si 3D) ANGLE
                ('DINI' DENS1) ('DFIN' DENS2)   'ROTA'


    Description :
    _____________

The LIGN operator enables the user to construct the arc of a circle of
centre CENTRE, from the POINT1, with the open-angle ANGLE.
In 2-D the orientation of the angle depends on the trigonometrical
direction.
In 3-D the circle belongs to the plane whose the normal is NORMAL.


    Contents :
    __________

CENTRE : circle centre (POINT type)

POINT1 : extreme point of the arc of the circle (POINT type)

N1     : number of generated elements (ENTIER type)

DENS1| : densities associated with the point POINT1 and the second extreme
DENS2|   point corresponding to the ANGLE (FLOTTANT type)

NORMAL : in 3-D this vector  is the normal of the circle. Let be CP the
         vector (CENTRE->POINT1), then the direct basis is
         (CP,NORMAL vectoriel CP,NORMAL) (POINT type)

ANGLE  : open-angle of the arc of a circle

GEO1   : arc of a circle (MAILLAGE type)


    Note :
    __________

      If N1 is not specified, the number of generated  elements as 
 well as their size will be computed in relation to the extreme point
 densities.
    If N1 is specified and positive, N1 elements of equal length
 will be generated.



-------------------------------------------------------------
| Case 2 : Construction of a line by translation of a point |
-------------------------------------------------------------


    GEO1 = LIGN (N1) POINT1 VECTEUR ('DINI' DENS1) ('DFIN' DENS2)  'TRAN'


    Description :
    _____________

The LIGN operator enables to construct the line from POINT1 to POINT2
where POINT2 = POINT1 + VECTEUR


    Contents :
    __________

POINT1  : extreme point of the line (POINt type)

VECTEUR : vector of translation of POINT1 (POINT type)

N1      : number of generated elements (ENTIER type)

DENS1|  : densities associated with the point POINT1 and the second extreme
DENS2|    point corresponding to the ANGLE (FLOTTANT type)

GEO1    : line (MAILLAGE type)


    Note :
    __________

      If N1 is not specified, the number of generated  elements as 
 well as their size will be computed in relation to the extreme point
 densities.
    If N1 is specified and positive, N1 elements of equal length
 will be generated.