DATE     96/10/10
    Opérateur PROJETER
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  | 1ER CAS|
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   GEO1 = GEO2 PROJ |('CYLI') VEC1  | |'PLAN' POIN1  POIN2  POIN3;
                    | 'CONI'  SOMM1 | |'SPHE' CENTR1 POIN1;
                                      |'CYLI' CENTR1 CENTR2 POIN1;
                                      |'CONI' SOMM2  AXEI1  POIN1;
                                      |'TORI' CENTR1 AXEI1  CENTR2 POIN1
                                      |'DROI' POIN1  POIN2;
                                      |'CERC' CENTR1 POIN1;

    Description :
    _____________

    The PROJ operator constucts a GEO1 object which stems from the
 projection of a GEO2 object with respect to a vector (CYLIndrical
 projection) or from the radial projection of given apex (CONIcal
 projection).

    Contents :
    __________

    GEO2   : geometry to be projected (MAILLAGE type)

    'CYLI' : key word referring to a cylindrical projection
             followed by :
    VEC1   : vector (POINT type) used in the cylindrical projection

    'CONI' : key word referring to a conical projection
             followed by :
   SOMM1   : centre of the conical projection (POINT type)


    The projection is done onto different geometrical supports
 according to the key word :

   'PLAN' : onto a plane defined by three points POIN1, POIN2 and 
            POIN3 (POINT type)

   'SPHE' : onto a sphere of CENTR1 centre (POINT type) passing through
            the POIN1 point (POINT type)

   'CYLI' : onto a cylinder with the axis passing through CENTR1 and
            CENTR2 (POINT type) and containing the POINT1 point
            (POINT type)

   'CONI' : onto the cone of SOMM2 apex (POINT type) whose axis passes
            through the AXEI1 point (POINT type) and containing the
            POIN1 point (POINT type)
           
   'TORI' : onto the torus of CENTR1 centre (POINT type) whose axis
            passes through the AXEI1 point (POINT type) of which one
            centre of small circle is CENTR2 (POINT type) and passing
            through the POIN1 point (POINT type)
            
   'DROI' : onto a straight line (in 2D) passing through the points
            POIN1 and POIN2 (POINT type)
            
   'CERC' : onto a circle (in 2D) of CENTR1 centre (POINT type) passing
            through the POIN1 point (POINT type)

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   | 2EME CAS |
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      GEO1 = GEO2 PROJ 'CYLI' DIR GEO3
                       'CONI' P1  GEO3


   Description :
   _____________

    The PROJ operator constructs a GEO1 object which results from the 
    cylindrical projection of a GEO2 object in the direction DIR on a
    GEO3 object, or a GEO1 object which results from the conical 
    projection of center P1 of a GEO2 object on a GEO3 object.


   Contents :
   __________

   GEO1 : object (maillage type) which results from projection  
              
   GEO2 : projected object (maillage type ) 

   CYLI : key word to call the cylindrical projection.

   CONI : key word to call the conical projection.

   DIR : direction of projection (point type)

   P1   : center of the conical projection (POINT type)

   GEO3 : object (maillage type) which carries the projected geometry