-- File:	TopOpeBRepTool_makeTransition.cdl
-- Created:	Thu Feb 11 11:41:08 1999
-- Author:      Xuan PHAM PHU
--		<xpu@poulopox.paris1.matra-dtv.fr>
---Copyright:	 Matra Datavision 1999

class makeTransition from TopOpeBRepTool
uses
    Pnt2d from gp,
    Edge from TopoDS,
    Face from TopoDS,
    State from TopAbs	        	
is    
	   
    Create returns makeTransition from TopOpeBRepTool;
    
    Initialize(me : in out; 
    	       E : Edge from TopoDS; pbef,paft,parE : Real;
    	       FS : Face from TopoDS; uv : Pnt2d from gp;
    	       factor : Real)
    returns Boolean;
    -- <E> interfers with <FS> at point :
    -- Pt(parE,E) = Pt(uv,FS)
    --  <pbef>,<paft> greater and lower <parE>.    

    Setfactor(me : in out; factor : Real); -- 0 < factor < 1
    Getfactor(me) returns Real;

    IsT2d(me) returns Boolean;  
	   
    SetRest(me : in out; 
    	    ES : Edge from TopoDS; parES : Real)
    returns Boolean;
    -- Pt(parES,ES) = Pt(uv,FS)
    --  Transition is computed vs <ES>, restrition on <FS>
    HasRest(me) returns Boolean;

    MkT2donE(me; stb,sta : out State from TopAbs)
    returns Boolean;  
    -- returns false if (!isT2d)   
    -- computes transition on <myE>, using tangent vectors. 

    MkT3onE(me; stb,sta : out State from TopAbs)
    returns Boolean;  
    -- returns false if (isT2d)
    -- return states in/out/on
    
    MkT3dproj(me; stb,sta : out State from TopAbs)
    returns Boolean;
    -- using projections.
    -- return states in/out/on
    
    MkTonE(me : in out; stb,sta : out State from TopAbs)
    returns Boolean;  
    -- Compute for <T> = transition on <E> vs <FS>.
    -- return states in/out/on.
    -- modifies field myfactor.

fields
    myE : Edge from TopoDS; 
    mypb,mypa,mypE : Real;
    myFS : Face from TopoDS;
    myuv : Pnt2d from gp;
    
    hasES : Boolean;
    myES : Edge from TopoDS;
    mypES : Real;

    isT2d : Boolean;	
    myfactor : Real;
	
end makeTransition;