-- File:	ShapeCustom.cdl
-- Created:	Wed Jun  3 12:40:02 1998
-- Author:	data exchange team
--		<det@loufox.nnov.matra-dtv.fr>
---Copyright:	 Matra Datavision 1998


package ShapeCustom 

    ---Purpose:  This package is intended to
-- convert geometrical objects and topological. The
-- modifications of one geometrical object to another
-- (one) geometrical object are provided. The supported
-- modifications are the following: 
--    conversion of BSpline and Bezier surfaces to analytical form, 
--     conversion of indirect elementary surfaces (with left-handed
--      coordinate systems) into  direct ones, 
--  conversion of elementary surfaces to surfaces of revolution, 
--  conversion of surface of linear extrusion, revolution, offset
--   surface to bspline, 
-- modification of parameterization, degree, number of segments of bspline
  -- surfaces,  scale the shape. 
  
uses

    gp,
    GeomAbs,
    Geom,
    Geom2d,
    TopLoc,
    TopoDS,
    BRepTools,
    TopTools,
    TColgp,
    Precision

is

    class Surface;
    
    class Curve;

    class Curve2d;

    class RestrictionParameters;

    class DirectModification;

    private class TrsfModification;
    private class BSplineRestriction;
    private class ConvertToRevolution;
    private class SweptToElementary;
    private class ConvertToBSpline;

    ApplyModifier(S      : Shape from TopoDS;
     	    	  M      : Modification from BRepTools;
		  context: in out DataMapOfShapeShape from TopTools;
		  MD     : in out Modifier from BRepTools)
		   
    returns Shape from TopoDS;
    	---Purpose: Applies modifier to shape and checks sharing in the case assemblies.

    DirectFaces(S: Shape from TopoDS) returns Shape from TopoDS;
    	---Purpose: Returns a new shape without indirect surfaces.
	
    ScaleShape (S: Shape from TopoDS; scale: Real) returns Shape from TopoDS;
    	---Purpose: Returns a new shape which is scaled original
	
    BSplineRestriction(S                         : Shape from TopoDS;
                       Tol3d, Tol2d              : Real; 
                       MaxDegree, MaxNbSegment   : Integer;
                       Continuity3d, Continuity2d: Shape from GeomAbs;
                       Degree                    : Boolean;
    	    	       Rational                  : Boolean;
		       aParameters               : RestrictionParameters from ShapeCustom)
    returns Shape from TopoDS;  
    	---Purpose: Returns a new shape with all surfaces, curves and pcurves
    	--          which type is BSpline/Bezier or based on them converted
    	--          having Degree less than <MaxDegree> or number of spans less
    	--          than <NbMaxSegment> in dependence on parameter priority <Degree>.
    	--          <GmaxDegree> and <GMaxSegments> are maximum possible degree
    	--          and number of spans correspondingly.
    	--          These values will be used in those cases when approximation with
    	--          specified parameters is impossible and one of GmaxDegree or
    	--          GMaxSegments is selected in dependence on priority.
    	--          Note that even if approximation is impossible with <GMaxDegree>
	--          then number of spans can exceed specified <GMaxSegment>
	--          <Rational> specifies if to convert Rational BSpline/Bezier into
	--          polynomial B-Spline.
	--          If flags ConvOffSurf,ConvOffCurve3d,ConvOffCurve2d are Standard_True there are means
	--          that Offset surfaces , Offset curves 3d and Offset curves 2d are converted to BSPline
	--          correspondingly.
	
    ConvertToRevolution (S: Shape from TopoDS) returns Shape from TopoDS;
    	---Purpose: Returns a new shape with all elementary periodic surfaces converted
	--          to Geom_SurfaceOfRevolution
	
    SweptToElementary (S: Shape from TopoDS) returns Shape from TopoDS;
    	---Purpose: Returns a new shape with all surfaces of revolution and linear extrusion
        --          convert to elementary periodic surfaces
	
    ConvertToBSpline (S         : Shape from TopoDS;
    	    	      extrMode  : Boolean; revolMode: Boolean;
                      offsetMode: Boolean; planeMode: Boolean = Standard_False)
    returns Shape from TopoDS;
    	---Purpose: Returns a new shape with all surfaces of linear extrusion, revolution,
    	--          offset, and planar surfaces converted according to flags to 
    	--          Geom_BSplineSurface (with same parameterisation).

end ShapeCustom;