-- File:	MakeLin2d.cdl
-- Created:	Wed Aug 26 14:30:57 1992
-- Author:	Remi GILET
--		<reg@topsn3>
---Copyright:	 Matra Datavision 1992

class MakeLin2d from gce inherits Root from gce

    ---Purpose : This class implements the following algorithms used 
    --           to create Lin2d from gp.
    --           
    --           * Create a Lin2d parallel to another and passing 
    --             through a point.
    --           * Create a Lin2d parallel to another at the distance 
    --             Dist.
    --           * Create a Lin2d passing through 2 points.
    --           * Create a Lin2d from its axis (Ax1 from gp).
    --           * Create a Lin2d from a point and a direction.
    --           * Create a Lin2d from its equation.

uses Pnt2d from gp,
     Lin2d from gp,
     Ax2d  from gp,
     Dir2d from gp,
     Real  from Standard

raises NotDone from StdFail

is

Create (A : Ax2d from gp)   returns MakeLin2d;
    --- Purpose : Creates a line located with A.

Create (P : Pnt2d from gp; 
    	V : Dir2d from gp)   returns MakeLin2d;
    --- Purpose : 
    --  <P> is the location point (origin) of the line and
    --  <V> is the direction of the line.

Create (A, B, C : Real)   returns MakeLin2d;
    --- Purpose :
    --  Creates the line from the equation A*X + B*Y + C = 0.0
    --  the status is "NullAxis"if Sqrt(A*A + B*B) <= Resolution from gp.

Create(Lin    :     Lin2d from gp      ;
       Dist   :     Real  from Standard) returns MakeLin2d;
    ---Purpose : Make a Lin2d from gp <TheLin> parallel to another 
    --           Lin2d <Lin> at a distance <Dist>.
    --           If Dist is greater than zero the result is on the 
    --           right of the Line <Lin>, else the result is on the 
    --           left of the Line <Lin>.

Create(Lin    :     Lin2d from gp;
       Point  :     Pnt2d from gp) returns MakeLin2d;
    ---Purpose : Make a Lin2d from gp <TheLin> parallel to another 
    --           Lin2d <Lin> and passing through a Pnt2d <Point>.

Create(P1     :     Pnt2d from gp;
       P2     :     Pnt2d from gp) returns MakeLin2d;
    ---Purpose : Make a Lin2d from gp <TheLin> passing through 2 
    --           Pnt2d <P1>,<P2>.
    --           It returns false if <P1> and <P2> are confused.
    -- Warning
    -- If an error occurs (that is, when IsDone returns
    -- false), the Status function returns:
    -- -   gce_NullAxis if Sqrt(A*A + B*B) is less
    --   than or equal to gp::Resolution(), or
    -- -   gce_ConfusedPoints if points P1 and P2 are coincident.
        
Value(me) returns Lin2d from gp
    raises NotDone
    is static;
    ---Purpose: Returns the constructed line.
    -- Exceptions StdFail_NotDone if no line is constructed.
    
Operator(me) returns Lin2d from gp
    is static;
    ---C++: alias "Standard_EXPORT operator gp_Lin2d() const;"

fields

    TheLin2d : Lin2d from gp;
    --The solution from gp.

end MakeLin2d;