-- File:	MakeCirc.cdl
-- Created:	Wed Aug 26 14:31:09 1992
-- Author:	Remi GILET
--		<reg@topsn3>
---Copyright:	 Matra Datavision 1992

class MakeCirc from gce inherits Root from gce

    ---Purpose : This class implements the following algorithms used 
    --           to create Circ from gp.
    --           
    --           * Create a Circ coaxial to another and passing 
    --             though a point.
    --           * Create a Circ coaxial to another at the distance 
    --             Dist.
    --           * Create a Circ passing through 3 points.
    --           * Create a Circ with its center and the normal of its 
    --             plane and its radius.
    --           * Create a Circ with its center and its plane and its 
    --             radius.
    --           * Create a Circ with its axis and radius.
    --           * Create a Circ with two points giving its axis and 
    --             its radius.
    --           * Create a Circ with is Ax2 and its Radius.

uses Pnt  from gp,
     Circ from gp,
     Dir  from gp,
     Ax1  from gp,
     Ax2  from gp,
     Pln  from gp,
     Real from Standard

raises NotDone from StdFail

is

Create (A2     : Ax2  from gp      ;
        Radius : Real from Standard)  returns MakeCirc;
    --- Purpose : 
    --  A2 locates the circle and gives its orientation in 3D space.
    --- Warnings :
    --  It is not forbidden to create a circle with Radius = 0.0
    --- The status is "NegativeRadius" if Radius < 0.0

Create(Circ : Circ from gp      ;
       Dist : Real   from Standard) returns MakeCirc;
    ---Purpose : Makes a Circ from gp <TheCirc> coaxial to another 
    --           Circ <Circ> at a distance <Dist>.
    --           If Dist is greater than zero the result is encloses 
    --           the circle <Circ>, else the result is enclosed by the 
    --           circle <Circ>.

Create(Circ    :     Circ from gp;
       Point   :     Pnt  from gp) returns MakeCirc;
    ---Purpose : Makes a Circ from gp <TheCirc> coaxial to another 
    --           Circ <Circ> and passing through a Pnt2d <Point>.

Create(P1,P2,P3 : Pnt  from gp) returns MakeCirc;
    ---Purpose : Makes a Circ from gp <TheCirc> passing through 3 
    --           Pnt2d <P1>,<P2>,<P3>.

Create(Center  : Pnt  from gp      ;
       Norm    : Dir  from gp      ;
       Radius  : Real from Standard) returns MakeCirc;
    ---Purpose : Makes a Circ from gp <TheCirc> with its center 
    --           <Center> and the normal of its plane <Norm> and 
    --           its radius <Radius>.

Create(Center  : Pnt  from gp      ;
       Plane   : Pln  from gp      ;
       Radius  : Real from Standard) returns MakeCirc;
    ---Purpose : Makes a Circ from gp <TheCirc> with its center 
    --           <Center> and the normal of its plane <Plane> and 
    --           its radius <Radius>.

Create(Center  : Pnt  from gp      ;
       Ptaxis  : Pnt  from gp      ;
       Radius  : Real from Standard) returns MakeCirc;
    ---Purpose : Makes a Circ from gp <TheCirc> with its center 
    --           <Center> and a point <Ptaxis> giving the normal 
    --           of its plane <Plane> and its radius <Radius>.

Create(Axis   : Ax1  from gp      ;
       Radius : Real from Standard) returns MakeCirc;
    ---Purpose : Makes a Circ from gp <TheCirc> with its center 
    --           <Center> and its radius <Radius>.
    -- Warning
    -- The MakeCirc class does not prevent the
    -- construction of a circle with a null radius.
    -- If an error occurs (that is, when IsDone returns
    -- false), the Status function returns:
    -- -   gce_Negative Radius if:
    --   -   Radius is less than 0.0, or
    --   -   Dist is less than 0.0 and the absolute value of
    --    Dist is greater than the radius of Circ;
    -- -   gce_IntersectionError if the points P1, P2 and
    --   P3 are collinear, and the three are not coincident;
    -- -   gce_ConfusedPoints if two of the three points
    --   P1, P2 and P3 are coincident; or
    -- -   gce_NullAxis if Center and Ptaxis are coincident.
        
Value(me) returns Circ from gp
    raises NotDone
    is static;
    ---C++: return const&
    ---Purpose: Returns the constructed circle.
    -- Exceptions StdFail_NotDone if no circle is constructed.

Operator(me) returns Circ from gp
    is static;
    ---C++: return const&
    ---C++: alias "Standard_EXPORT operator gp_Circ() const;"

fields

    TheCirc : Circ from gp;
    --The solution from gp.
    
end MakeCirc;