[occt.git] / src / BRepAdaptor / BRepAdaptor_Surface.cdl

-- Created on: 1993-02-22
-- Created by: Remi LEQUETTE
-- Copyright (c) 1993-1999 Matra Datavision
-- Copyright (c) 1999-2014 OPEN CASCADE SAS
--
-- This file is part of Open CASCADE Technology software library.
--
-- This library is free software; you can redistribute it and/or modify it under
-- the terms of the GNU Lesser General Public License version 2.1 as published
-- by the Free Software Foundation, with special exception defined in the file
-- OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
-- distribution for complete text of the license and disclaimer of any warranty.
--
-- Alternatively, this file may be used under the terms of Open CASCADE
-- commercial license or contractual agreement.

class Surface from BRepAdaptor inherits Surface from Adaptor3d

	---Purpose: The Surface from BRepAdaptor allows to  use a Face
	--          of the BRep topology look like a 3D surface.
	--          
	--          It  has  the methods  of  the class   Surface from
	--          Adaptor3d.
	--          
	--          It is created or initialized with a Face. It takes
	--          into account the local coordinates system.
	--          
	--          The  u,v parameter range is   the minmax value for
	--          the  restriction,  unless  the flag restriction is
	--          set to false.

uses
    Face            from TopoDS,
    SurfaceType     from GeomAbs,
    HSurface        from Adaptor3d,
    HCurve          from Adaptor3d,
    Surface         from GeomAdaptor,
    Shape           from GeomAbs,
    BezierSurface   from Geom,
    BSplineSurface  from Geom,
    Trsf            from gp,
    Pnt             from gp,
    Vec             from gp,
    Dir             from gp,
    Pln             from gp,
    Cylinder        from gp,
    Sphere          from gp,
    Torus           from gp,
    Cone            from gp,
    Ax1             from gp,
    Array1OfReal    from TColStd


raises 

    OutOfRange   from Standard,
    DomainError  from Standard,
    NoSuchObject from Standard

is

    Create returns Surface from BRepAdaptor;
	---Purpose: Creates an undefined surface with no face loaded.
	
    Create(F : Face from TopoDS;
           R : Boolean = Standard_True) 
    returns Surface from BRepAdaptor;
	---Purpose: Creates a surface to  access the geometry  of <F>.
	--          If  <Restriction> is  true  the parameter range is
	--          the  parameter  range  in   the  UV space  of  the
	--          restriction. 
	
    Initialize(me : in out; F : Face from TopoDS; 
    	    	    	    Restriction : Boolean = Standard_True)
	---Purpose: Sets the surface to the geometry of <F>.
    is static;
    
    Surface(me) returns Surface from GeomAdaptor
	---Purpose: Returns the surface.
	--          
	---C++: return const &
    is static;
    
    ChangeSurface(me : in out) returns Surface from GeomAdaptor
	---Purpose: Returns the surface.
	--          
	---C++: return &
    is static;
    
    Trsf(me) returns Trsf from gp
	---Purpose: Returns the surface coordinate system.
	--          
	---C++: return const &
    is static;
    
    Face(me) returns Face from TopoDS
	---Purpose: Returns the face.
	--          
	---C++: return const &
    is static;
    
    Tolerance(me) returns Real
	---Purpose: Returns the face tolerance.
	--          
    is static;

    --
    --  Methods of Surface from GeomAdaptor
    --              
    
    FirstUParameter(me) returns Real
         ---C++:inline
    is redefined static;

    LastUParameter(me) returns Real
         ---C++:inline
    is redefined static;
    
    FirstVParameter(me) returns Real
         ---C++:inline
    is redefined static;

    LastVParameter(me) returns Real
         ---C++:inline
    is redefined static;
    
    UContinuity(me) returns Shape from GeomAbs
         ---C++:inline
    is redefined static;
    
    VContinuity(me) returns Shape from GeomAbs
         ---C++:inline
    is redefined static;
    
    NbUIntervals(me; S : Shape from GeomAbs) returns Integer
	---Purpose: If necessary, breaks the surface in U intervals of
	--          continuity    <S>.  And   returns  the  number  of
	--          intervals.
        ---C++:inline
    is redefined static;
    
    NbVIntervals(me; S : Shape from GeomAbs) returns Integer
	---Purpose: If necessary, breaks the surface in V intervals of
	--          continuity    <S>.  And   returns  the  number  of
	--          intervals.
        ---C++:inline
    is redefined static;
    
    UIntervals(me; T : in out Array1OfReal from TColStd; 
    	    	   S :        Shape        from GeomAbs ) 
	---Purpose: Returns the  intervals with the requested continuity
	--          in the U direction.
    raises
    	OutOfRange from Standard -- if the Length of the array does
	    	    	         -- have enought slots to accomodate
	    	    	         -- the result.
    is redefined static;

    VIntervals(me; T : in out Array1OfReal from TColStd; 
    	    	   S :        Shape        from GeomAbs ) 
	---Purpose: Returns the  intervals with the requested continuity
	--          in the V direction.
    raises
    	OutOfRange from Standard -- if the Length of the array does
	    	    	         -- have enought slots to accomodate
	    	    	         -- the result.
    is redefined static;
    
    UTrim(me; First, Last, Tol : Real) returns HSurface from Adaptor3d
	---Purpose: Returns    a  surface trimmed in the U direction
	--           equivalent   of  <me>  between
	--          parameters <First>  and <Last>. <Tol>  is used  to
	--          test for 3d points confusion.
    raises
    	OutOfRange from Standard
	---Purpose: If <First> >= <Last> 
    is redefined static ;
    
    VTrim(me; First, Last, Tol : Real) returns HSurface from Adaptor3d
	---Purpose: Returns    a  surface trimmed in the V direction  between
	--          parameters <First>  and <Last>. <Tol>  is used  to
	--          test for 3d points confusion.
    raises
    	OutOfRange from Standard
	---Purpose: If <First> >= <Last> 
    is redefined static ;

    IsUClosed(me) returns Boolean
         ---C++:inline
    is redefined static;
     
    IsVClosed(me) returns Boolean
         ---C++:inline
    is redefined static;
     
    IsUPeriodic(me) returns Boolean
         ---C++:inline
    is redefined static;
    
    UPeriod(me) returns Real
    raises
    	DomainError from Standard -- if the curve is not periodic
         ---C++:inline
    is redefined static;
     
    IsVPeriodic(me) returns Boolean
         ---C++:inline
    is redefined static;
    
    VPeriod(me) returns Real
         ---C++:inline
    raises
    	DomainError from Standard -- if the curve is not periodic
    is redefined static;
     
    Value (me; U, V : Real)  returns Pnt from gp
        --- Purpose : Computes the point of parameters U,V on the surface.
    is redefined static;

    D0 (me; U, V : Real; P : out Pnt from gp)
        --- Purpose : Computes the point of parameters U,V on the surface.
    is redefined static;

    D1 (me; U, V     : Real; 
    	    P        : out Pnt from gp; 
    	    D1U, D1V : out Vec from gp)
        --- Purpose : Computes the point  and the first derivatives on
        --  the surface.
    raises 
    	DomainError from Standard
            --- Purpose   : Raised   if  the continuity  of   the  current
            --  intervals is not C1.
    is redefined static;

    D2 (me; U, V : Real; 
    	    P : out Pnt from gp; 
    	    D1U, D1V, D2U, D2V, D2UV : out Vec from gp)
        --- Purpose  :  Computes   the point,  the  first  and  second
        --  derivatives on the surface.
    raises 
    	DomainError from Standard
            --- Purpose   : Raised  if   the   continuity   of the current
            --  intervals is not C2.
    is redefined static;

    D3 (me; U, V : Real; P : out Pnt from gp; 
    	    D1U, D1V, D2U, D2V, D2UV, D3U, D3V, D3UUV, D3UVV : out Vec from gp)
        --- Purpose : Computes the point,  the first, second and third
        --  derivatives on the surface.
    raises 
    	DomainError from Standard
            --- Purpose   : Raised  if   the   continuity   of the current
            --  intervals is not C3.
    is redefined static;

    DN (me; U, V : Real; Nu, Nv : Integer)   returns Vec from gp
        --- Purpose :  Computes the derivative of order Nu in the direction 
        --  U and Nv in the direction V at the point P(U, V).
    raises 
    	DomainError from Standard,
            --- Purpose : Raised if the current U  interval is not not CNu
            --  and the current V interval is not CNv.
        OutOfRange from Standard
            --- Purpose : Raised if Nu + Nv < 1 or Nu < 0 or Nv < 0.
    is redefined static;
  
    UResolution(me; R3d : Real ) returns Real
         ---Purpose :  Returns the parametric U  resolution corresponding
         --         to the real space resolution <R3d>.
         --         
	---C++:inline
    is redefined static;
  
    VResolution(me; R3d : Real ) returns Real
         ---Purpose :  Returns the parametric V  resolution corresponding
         --         to the real space resolution <R3d>.
         --         
	---C++:inline
    is redefined static;
  
    GetType(me) returns SurfaceType from GeomAbs
	---Purpose: Returns the type of the surface : Plane, Cylinder,
	--          Cone,      Sphere,        Torus,    BezierSurface,
	--          BSplineSurface,               SurfaceOfRevolution,
	--          SurfaceOfExtrusion, OtherSurface
	---C++:inline
    is redefined static;
    
    Plane(me) returns Pln from gp
      raises NoSuchObject from Standard
      
    is redefined static;
    
    Cylinder(me) returns Cylinder from gp
      raises NoSuchObject from Standard
    is redefined static;
    
    Cone(me) returns Cone from gp
      raises NoSuchObject from Standard
    is redefined static;
    
    Sphere(me) returns Sphere from gp
      raises NoSuchObject from Standard
    is redefined static;
    
    Torus(me) returns Torus from gp
      raises NoSuchObject from Standard
    is redefined static;


    UDegree(me) returns Integer 
     raises NoSuchObject from Standard
     ---C++:inline
    is redefined static;

    NbUPoles(me) returns Integer
     raises NoSuchObject from Standard
    ---C++:inline
    is redefined static;

    VDegree(me) returns Integer
     raises NoSuchObject from Standard
	---C++:inline    
    is redefined static;

    NbVPoles(me) returns Integer
     raises NoSuchObject from Standard
	---C++:inline     
    is redefined static;
    
    
    NbUKnots(me) returns Integer
    raises 
       NoSuchObject from Standard
	---C++:inline       
    is redefined static;
    
    
    NbVKnots(me) returns Integer
    raises 
       NoSuchObject from Standard
	---C++:inline       
    is redefined static;
    
    
    IsURational(me) returns Boolean
    raises
    	NoSuchObject from Standard
	---C++:inline	
    is redefined static;
    
    IsVRational(me) returns Boolean
    raises
    	NoSuchObject from Standard
	---C++:inline	
    is redefined static;
    

    Bezier(me) returns BezierSurface from Geom
    	---Purpose: 
--Warning : this will make a copy of the 
    	--           Bezier Surface since it applies
    	--           to it the myTsrf transformation
    	--           Be Carefull when using this method

    raises 
    	NoSuchObject from Standard
    is redefined static;

    BSpline(me) returns BSplineSurface from Geom
    	---Purpose: 
--  Warning : this will make a copy of the 
    	--           BSpline Surface since it applies
    	--           to it the myTsrf transformation
    	--           Be Carefull when using this method

    raises 
    	NoSuchObject from Standard
    is redefined static;
    
    AxeOfRevolution(me) returns Ax1 from gp
    raises 
       NoSuchObject from Standard -- only for SurfaceOfRevolution
    is redefined static;

    Direction(me) returns Dir from gp
    raises 
       NoSuchObject from Standard -- only for SurfaceOfExtrusion
    is redefined static;

    BasisCurve(me) returns HCurve from Adaptor3d
    raises 
       NoSuchObject from Standard
       ---Purpose: only for SurfaceOfExtrusion and SurfaceOfRevolution
       --  Warning: this will make a copy of the underlying curve
       --          since it applies to it the transformation
       --          myTrsf. Be carefull when using this method.
    is redefined static;

    BasisSurface(me) returns HSurface from Adaptor3d
    raises 
       NoSuchObject from Standard -- only for Offset Surface
    is redefined static;

    OffsetValue(me) returns Real from Standard
    raises 
       NoSuchObject from Standard -- only for Offset Surface
    is redefined static;

fields

    mySurf : Surface from GeomAdaptor;
    myTrsf : Trsf from gp;
    myFace : Face from TopoDS;

end Surface;
Commit	Line	Data
b311480e	1	-- Created on: 1993-02-22
	2	-- Created by: Remi LEQUETTE
	3	-- Copyright (c) 1993-1999 Matra Datavision
973c2be1	4	-- Copyright (c) 1999-2014 OPEN CASCADE SAS
b311480e	5	--
973c2be1	6	-- This file is part of Open CASCADE Technology software library.
b311480e	7	--
d5f74e42	8	-- This library is free software; you can redistribute it and/or modify it under
d5f74e42	9	-- the terms of the GNU Lesser General Public License version 2.1 as published
973c2be1	10	-- by the Free Software Foundation, with special exception defined in the file
	11	-- OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
	12	-- distribution for complete text of the license and disclaimer of any warranty.
b311480e	13	--
973c2be1	14	-- Alternatively, this file may be used under the terms of Open CASCADE
973c2be1	15	-- commercial license or contractual agreement.
7fd59977	16
	17	class Surface from BRepAdaptor inherits Surface from Adaptor3d
	18
	19	---Purpose: The Surface from BRepAdaptor allows to use a Face
	20	-- of the BRep topology look like a 3D surface.
	21	--
	22	-- It has the methods of the class Surface from
	23	-- Adaptor3d.
	24	--
	25	-- It is created or initialized with a Face. It takes
	26	-- into account the local coordinates system.
	27	--
	28	-- The u,v parameter range is the minmax value for
	29	-- the restriction, unless the flag restriction is
	30	-- set to false.
	31
	32	uses
	33	Face from TopoDS,
	34	SurfaceType from GeomAbs,
	35	HSurface from Adaptor3d,
	36	HCurve from Adaptor3d,
	37	Surface from GeomAdaptor,
	38	Shape from GeomAbs,
	39	BezierSurface from Geom,
	40	BSplineSurface from Geom,
	41	Trsf from gp,
	42	Pnt from gp,
	43	Vec from gp,
	44	Dir from gp,
	45	Pln from gp,
	46	Cylinder from gp,
	47	Sphere from gp,
	48	Torus from gp,
	49	Cone from gp,
	50	Ax1 from gp,
	51	Array1OfReal from TColStd
	52
	53
	54	raises
	55
	56	OutOfRange from Standard,
	57	DomainError from Standard,
	58	NoSuchObject from Standard
	59
	60	is
	61
	62	Create returns Surface from BRepAdaptor;
	63	---Purpose: Creates an undefined surface with no face loaded.
	64
	65	Create(F : Face from TopoDS;
	66	R : Boolean = Standard_True)
	67	returns Surface from BRepAdaptor;
	68	---Purpose: Creates a surface to access the geometry of <F>.
	69	-- If <Restriction> is true the parameter range is
	70	-- the parameter range in the UV space of the
	71	-- restriction.
	72
	73	Initialize(me : in out; F : Face from TopoDS;
	74	Restriction : Boolean = Standard_True)
	75	---Purpose: Sets the surface to the geometry of <F>.
	76	is static;
	77
	78	Surface(me) returns Surface from GeomAdaptor
	79	---Purpose: Returns the surface.
80	--
81	---C++: return const &
82	is static;
83
84	ChangeSurface(me : in out) returns Surface from GeomAdaptor
85	---Purpose: Returns the surface.
86	--
87	---C++: return &
88	is static;
89
90	Trsf(me) returns Trsf from gp
91	---Purpose: Returns the surface coordinate system.
92	--
93	---C++: return const &
94	is static;
95
96	Face(me) returns Face from TopoDS
97	---Purpose: Returns the face.
98	--
99	---C++: return const &
100	is static;
101
102	Tolerance(me) returns Real
103	---Purpose: Returns the face tolerance.
104	--
105	is static;
106
107	--
108	-- Methods of Surface from GeomAdaptor
109	--
110
111	FirstUParameter(me) returns Real
112	---C++:inline
113	is redefined static;
114
115	LastUParameter(me) returns Real
116	---C++:inline
117	is redefined static;
118
119	FirstVParameter(me) returns Real
120	---C++:inline
121	is redefined static;
122
123	LastVParameter(me) returns Real
124	---C++:inline
125	is redefined static;
126
127	UContinuity(me) returns Shape from GeomAbs
128	---C++:inline
129	is redefined static;
130
131	VContinuity(me) returns Shape from GeomAbs
132	---C++:inline
133	is redefined static;
134
135	NbUIntervals(me; S : Shape from GeomAbs) returns Integer
136	---Purpose: If necessary, breaks the surface in U intervals of
137	-- continuity <S>. And returns the number of
138	-- intervals.
139	---C++:inline
140	is redefined static;
141
142	NbVIntervals(me; S : Shape from GeomAbs) returns Integer
143	---Purpose: If necessary, breaks the surface in V intervals of
144	-- continuity <S>. And returns the number of
145	-- intervals.
146	---C++:inline
147	is redefined static;
148
149	UIntervals(me; T : in out Array1OfReal from TColStd;
150	S : Shape from GeomAbs )
151	---Purpose: Returns the intervals with the requested continuity
152	-- in the U direction.
153	raises
154	OutOfRange from Standard -- if the Length of the array does
155	-- have enought slots to accomodate
156	-- the result.
157	is redefined static;
158
159	VIntervals(me; T : in out Array1OfReal from TColStd;
160	S : Shape from GeomAbs )
161	---Purpose: Returns the intervals with the requested continuity
162	-- in the V direction.
163	raises
164	OutOfRange from Standard -- if the Length of the array does
165	-- have enought slots to accomodate
166	-- the result.
167	is redefined static;
168
169	UTrim(me; First, Last, Tol : Real) returns HSurface from Adaptor3d
170	---Purpose: Returns a surface trimmed in the U direction
171	-- equivalent of <me> between
172	-- parameters <First> and <Last>. <Tol> is used to
173	-- test for 3d points confusion.
174	raises
175	OutOfRange from Standard
176	---Purpose: If <First> >= <Last>
177	is redefined static ;
178
179	VTrim(me; First, Last, Tol : Real) returns HSurface from Adaptor3d
180	---Purpose: Returns a surface trimmed in the V direction between
181	-- parameters <First> and <Last>. <Tol> is used to
182	-- test for 3d points confusion.
183	raises
184	OutOfRange from Standard
185	---Purpose: If <First> >= <Last>
186	is redefined static ;
187
188	IsUClosed(me) returns Boolean
189	---C++:inline
190	is redefined static;
191
192	IsVClosed(me) returns Boolean
193	---C++:inline
194	is redefined static;
195
196	IsUPeriodic(me) returns Boolean
197	---C++:inline
198	is redefined static;
199
200	UPeriod(me) returns Real
201	raises
202	DomainError from Standard -- if the curve is not periodic
203	---C++:inline
204	is redefined static;
205
206	IsVPeriodic(me) returns Boolean
207	---C++:inline
208	is redefined static;
209
210	VPeriod(me) returns Real
211	---C++:inline
212	raises
213	DomainError from Standard -- if the curve is not periodic
214	is redefined static;
215
216	Value (me; U, V : Real) returns Pnt from gp
217	--- Purpose : Computes the point of parameters U,V on the surface.
218	is redefined static;
219
220	D0 (me; U, V : Real; P : out Pnt from gp)
221	--- Purpose : Computes the point of parameters U,V on the surface.
222	is redefined static;
223
224	D1 (me; U, V : Real;
225	P : out Pnt from gp;
226	D1U, D1V : out Vec from gp)
227	--- Purpose : Computes the point and the first derivatives on
228	-- the surface.
229	raises
230	DomainError from Standard
231	--- Purpose : Raised if the continuity of the current
232	-- intervals is not C1.
233	is redefined static;
234
235	D2 (me; U, V : Real;
236	P : out Pnt from gp;
237	D1U, D1V, D2U, D2V, D2UV : out Vec from gp)
238	--- Purpose : Computes the point, the first and second
239	-- derivatives on the surface.
240	raises
241	DomainError from Standard
242	--- Purpose : Raised if the continuity of the current
243	-- intervals is not C2.
244	is redefined static;
245
246	D3 (me; U, V : Real; P : out Pnt from gp;
247	D1U, D1V, D2U, D2V, D2UV, D3U, D3V, D3UUV, D3UVV : out Vec from gp)
248	--- Purpose : Computes the point, the first, second and third
249	-- derivatives on the surface.
250	raises
251	DomainError from Standard
252	--- Purpose : Raised if the continuity of the current
253	-- intervals is not C3.
254	is redefined static;
255
256	DN (me; U, V : Real; Nu, Nv : Integer) returns Vec from gp
257	--- Purpose : Computes the derivative of order Nu in the direction
258	-- U and Nv in the direction V at the point P(U, V).
259	raises
260	DomainError from Standard,
261	--- Purpose : Raised if the current U interval is not not CNu
262	-- and the current V interval is not CNv.
263	OutOfRange from Standard
264	--- Purpose : Raised if Nu + Nv < 1 or Nu < 0 or Nv < 0.
265	is redefined static;
266
267	UResolution(me; R3d : Real ) returns Real
268	---Purpose : Returns the parametric U resolution corresponding
269	-- to the real space resolution <R3d>.
270	--
271	---C++:inline
272	is redefined static;
273
274	VResolution(me; R3d : Real ) returns Real
275	---Purpose : Returns the parametric V resolution corresponding
276	-- to the real space resolution <R3d>.
277	--
278	---C++:inline
279	is redefined static;
280
281	GetType(me) returns SurfaceType from GeomAbs
282	---Purpose: Returns the type of the surface : Plane, Cylinder,
283	-- Cone, Sphere, Torus, BezierSurface,
284	-- BSplineSurface, SurfaceOfRevolution,
285	-- SurfaceOfExtrusion, OtherSurface
286	---C++:inline
287	is redefined static;
288
289	Plane(me) returns Pln from gp
290	raises NoSuchObject from Standard
291
292	is redefined static;
293
294	Cylinder(me) returns Cylinder from gp
295	raises NoSuchObject from Standard
296	is redefined static;
297
298	Cone(me) returns Cone from gp
299	raises NoSuchObject from Standard
300	is redefined static;
301
302	Sphere(me) returns Sphere from gp
303	raises NoSuchObject from Standard
304	is redefined static;
305
306	Torus(me) returns Torus from gp
307	raises NoSuchObject from Standard
308	is redefined static;
309
310
311	UDegree(me) returns Integer
312	raises NoSuchObject from Standard
313	---C++:inline
314	is redefined static;
315
316	NbUPoles(me) returns Integer
317	raises NoSuchObject from Standard
318	---C++:inline
319	is redefined static;
320
321	VDegree(me) returns Integer
322	raises NoSuchObject from Standard
323	---C++:inline
324	is redefined static;
325
326	NbVPoles(me) returns Integer
327	raises NoSuchObject from Standard
328	---C++:inline
329	is redefined static;
330
331
332	NbUKnots(me) returns Integer
333	raises
334	NoSuchObject from Standard
335	---C++:inline
336	is redefined static;
337
338
339	NbVKnots(me) returns Integer
340	raises
341	NoSuchObject from Standard
342	---C++:inline
343	is redefined static;
344
345
346	IsURational(me) returns Boolean
347	raises
348	NoSuchObject from Standard
349	---C++:inline
350	is redefined static;
351
352	IsVRational(me) returns Boolean
353	raises
354	NoSuchObject from Standard
355	---C++:inline
356	is redefined static;
357
358
359	Bezier(me) returns BezierSurface from Geom
360	---Purpose:
361	--Warning : this will make a copy of the
362	-- Bezier Surface since it applies
363	-- to it the myTsrf transformation
364	-- Be Carefull when using this method
365
366	raises
367	NoSuchObject from Standard
368	is redefined static;
369
370	BSpline(me) returns BSplineSurface from Geom
371	---Purpose:
372	-- Warning : this will make a copy of the
373	-- BSpline Surface since it applies
374	-- to it the myTsrf transformation
375	-- Be Carefull when using this method
376
377	raises
378	NoSuchObject from Standard
379	is redefined static;
380
381	AxeOfRevolution(me) returns Ax1 from gp
382	raises
383	NoSuchObject from Standard -- only for SurfaceOfRevolution
384	is redefined static;
385
386	Direction(me) returns Dir from gp
387	raises
388	NoSuchObject from Standard -- only for SurfaceOfExtrusion
389	is redefined static;
390
391	BasisCurve(me) returns HCurve from Adaptor3d
392	raises
393	NoSuchObject from Standard
394	---Purpose: only for SurfaceOfExtrusion and SurfaceOfRevolution
395	-- Warning: this will make a copy of the underlying curve
396	-- since it applies to it the transformation
397	-- myTrsf. Be carefull when using this method.
398	is redefined static;
399
400	BasisSurface(me) returns HSurface from Adaptor3d
401	raises
402	NoSuchObject from Standard -- only for Offset Surface
403	is redefined static;
404
405	OffsetValue(me) returns Real from Standard
406	raises
407	NoSuchObject from Standard -- only for Offset Surface
408	is redefined static;
409
410	fields
411
412	mySurf : Surface from GeomAdaptor;
413	myTrsf : Trsf from gp;
414	myFace : Face from TopoDS;
415
416	end Surface;