-- File:	EdgeFaceTransition.cdl
-- Created:	Tue Aug 11 18:17:52 1992
-- Author:	Remi LEQUETTE
--		<rle@phylox>
---Copyright:	 Matra Datavision 1992




class EdgeFaceTransition from TopCnx 

	---Purpose: TheEdgeFaceTransition is an algorithm to   compute
	--          the  cumulated  transition for interferences on an
	--          edge. 

uses

    Boolean from Standard,
    Real    from Standard,
    Integer from Standard,
    
    Pnt from gp,
    Dir from gp,
    
    State from TopAbs,
    Orientation from TopAbs,

    CurveTransition from TopTrans

is
    Create returns EdgeFaceTransition from TopCnx;
	---Purpose: Creates an empty algorithm.

    Reset( me   : in out;
    	   Tgt  : Dir from gp;        -- Tangent at this point      
    	   Norm : Dir from gp;        -- Normal vector at this point
    	   Curv : Real from Standard) -- Curvature at this point     
	---Purpose: Initialize  the     algorithm    with the    local
	--          description of the edge.
    is static;

    Reset( me   : in out;
    	   Tgt  : in Dir from gp)        -- Tangent at this point      
	---Purpose: Initialize the algorithm with a linear Edge.
    is static;
    
    AddInterference(me : in out;
    	    Tole : Real from Standard;      -- Cosine tolerance
    	    Tang : Dir from gp;             -- Tangent on curve for this point
   	    Norm : Dir from gp;             -- Normal vector at this point
    	    Curv : Real from Standard;      -- Curvature at this point    
    	    Or   : Orientation from TopAbs; -- Orientation on the curve 
	    Tr   : Orientation from TopAbs; -- Transition
	    BTr  : Orientation from TopAbs) -- Boundary transition	    
	---Purpose: Add a curve  element to the  boundary.  Or  is the
	--          orientation of   the interference on  the boundary
	--          curve. Tr is  the transition  of the interference.
	--          BTr     is   the    boundary  transition    of the
	--          interference.
    is static;
    
    Transition(me) returns Orientation from TopAbs
	---Purpose: Returns the current cumulated transition.
    is static;
    
    BoundaryTransition(me) returns Orientation from TopAbs
	---Purpose: Returns the current cumulated BoundaryTransition.
    is static;

fields
    myCurveTransition : CurveTransition from TopTrans;
    nbBoundForward    : Integer from Standard;
    nbBoundReversed   : Integer from Standard;

end EdgeFaceTransition;