-- File:	IntPatch_LineConstructor.cdl
-- Created:	Thu Nov  7 10:32:26 1996
-- Author:	Laurent BUCHARD
---Copyright:	 Matra Datavision 1996


class LineConstructor from IntPatch

    ---Purpose: The intersections  algorithms compute the intersection
    --          on two surfaces and  return the intersections lines as
    --          IntPatch_Line.  

    --	        a  IntPatch   Line contains  a   geometrical part  and
    --	        several topological informations (the    intersections
    --	        between the intersection curve and the restrictions of
    --	        the faces.) 
    --	        
    --	          The LineConstructor algorithm takes an IntPatch_Line
    --	          and compute on this object the sections which belong
    --	          to the two  faces (which are inside the restrictions
    --	          of the faces)
    --	          

uses 
    HSurface       from Adaptor3d,
    TopolTool      from Adaptor3d,
    SequenceOfLine from IntPatch,
    Line           from  IntPatch,
    SurfaceType    from GeomAbs

is   

    Create(mode  :  Integer  from  Standard) 
     
     
     	--Purpose: ***** THE ONLY MODE SUPPORTED IS MODE=2 *****
        --Purpose: mode = 0 .... Nothing is done  
        --          
        --         mode = 1 .... Only cuts the line. 
        --         
        --         mode = 2 .... Cuts the line and keep the valid lines
        --         
    	returns  LineConstructor  from  IntPatch; 
	 
    Perform(me:  in  out; 
    	    SL :  SequenceOfLine from IntPatch;
            L  :  Line         from  IntPatch;     
            S1 :  HSurface from Adaptor3d; 
            D1 :  TopolTool from Adaptor3d; 
            S2 :  HSurface from Adaptor3d; 
	    D2 :  TopolTool from Adaptor3d;
            Tol:  Real        from Standard)
       is  static; 
        
    NbLines(me) 
     
          returns  Integer  from  Standard 
	  is  static; 
	   
    Line(me;  index:  Integer  from  Standard) 
     	 
	  returns  Line  from  IntPatch
          is  static;

fields

    slin       : SequenceOfLine from IntPatch;

end LineConstructor;