-- File:	ShapeUpgrade_SplitCurve.cdl
-- Created:	Thu Mar 12 11:14:13 1998
-- Author:	Pierre BARRAS
--		<pbs@sgi84>
---Copyright:	 Matra Datavision 1998

class SplitCurve from ShapeUpgrade inherits TShared from MMgt

    	---Purpose: Splits a  curve with a  criterion.
    
uses     
    Curve          from Geom,
    HArray1OfCurve from TColGeom,
    HSequenceOfReal  from TColStd,
    Shape          from GeomAbs,
    Status         from  ShapeExtend
is 
 
    Create returns mutable SplitCurve from ShapeUpgrade;
    	---Purpose: Empty constructor.

    Init (me: mutable; First, Last: Real);
    	---Purpose: Initializes with curve first and last parameters.
	
    SetSplitValues (me: mutable; SplitValues: HSequenceOfReal from TColStd);
    	---Purpose: Sets the parameters where splitting has to be done.
	
    Build (me: mutable; Segment: Boolean) is virtual;
       ---Purpose: If Segment is True, the result is composed with
       --  segments of the curve bounded by the SplitValues.  If
       --  Segment is False, the result is composed with trimmed
       --  Curves all based on the same complete curve.
       --  

    SplitValues(me) returns HSequenceOfReal from TColStd;
       ---C++: return const &
       --- Purpose : returns all the splitting values including the  
       --  First and Last parameters of the input curve

       
    ---Level: Internal
    
    --PrepareKnots (me: mutable) is protected;
    	---Purpose: Merges input split values and new ones into myGlobalKnots
    
    Compute(me: mutable) is virtual;
    	---Purpose: Calculates points for correction/splitting of the curve
    
    Perform(me: mutable; Segment: Boolean = Standard_True);
    	---Purpose: Performs correction/splitting of the curve.
	---         First defines splitting values by method Compute(), then calls method Build().   
	
    Status (me; status: Status from ShapeExtend) returns Boolean;
    	---Purpose: Returns the status 
	-- OK    - no splitting is needed
	-- DONE1 - splitting required and gives more than one segment
	-- DONE2 - splitting is required, but gives only one segment (initial)
	-- DONE3 - geometric form of the curve or parametrisation is modified
fields 
 
    mySplitValues     : HSequenceOfReal from TColStd is protected;  
    myNbCurves        : Integer is protected;
    myStatus : Integer is protected; 
end;