[occt.git] / src / Graphic3d / Graphic3d_AspectFillArea3d.cdl

-- Created on: 1991-11-04
-- Created by: NW,JPB,CAL
-- Copyright (c) 1991-1999 Matra Datavision
-- Copyright (c) 1999-2012 OPEN CASCADE SAS
--
-- The content of this file is subject to the Open CASCADE Technology Public
-- License Version 6.5 (the "License"). You may not use the content of this file
-- except in compliance with the License. Please obtain a copy of the License
-- at http://www.opencascade.org and read it completely before using this file.
--
-- The Initial Developer of the Original Code is Open CASCADE S.A.S., having its
-- main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France.
--
-- The Original Code and all software distributed under the License is
-- distributed on an "AS IS" basis, without warranty of any kind, and the
-- Initial Developer hereby disclaims all such warranties, including without
-- limitation, any warranties of merchantability, fitness for a particular
-- purpose or non-infringement. Please see the License for the specific terms
-- and conditions governing the rights and limitations under the License.

-- Modified:    1/08/97 ; PCT : Ajout texture mapping
--              16/01/98 ; FMN : Ajout Hiddenline
--              0312/99  ; GG : BUC60488 Why the field DistinguishModeActive
--                      field is not accessible properly ?
--                      workaround : Move the Material fields at end.
--              26/01/00 ; EUG/GG degeneration management (G003)
--                       Add SetDegenerateModel() and DegenerateModel() methods
--              29/09/00 ; GG degeneration management (G003)
--                       Add SetDefaultDegenerateModel() and DefaultDegenerateModel() methods
--              22/03/04 ; OCC4895 SAN High-level interface for controlling polygon offsets

class AspectFillArea3d from Graphic3d inherits AspectFillArea from Aspect

        ---Version:

        ---Purpose: This class permits the creation and updating of
        --          a graphic attribute context for opaque 3d
        --          primitives (polygons, triangles, quadrilaterals)
        --  Keywords: Face, FillArea, Triangle, Quadrangle, Polygon,
        --           TriangleMesh, QuadrangleMesh, Edge, Border, Interior,
        --           Color, Type, Width, Style, Hatch, Material,
        --           BackFaceRemoval, DistinguishMode

        ---Warning:
        ---References:

uses

        Color           from Quantity,
        Ratio           from Quantity,

        TypeOfLine      from Aspect,    
        InteriorStyle   from Aspect,
        TypeOfDegenerateModel from Aspect, 

        MaterialAspect  from Graphic3d,
        TextureMap      from Graphic3d

is

        Create
                returns mutable AspectFillArea3d from Graphic3d;
        ---Level: Public
        ---Purpose: Creates a context table for fill area primitives
        --          defined with the following default values:
        --
        --          InteriorStyle       : IS_EMPTY
        --          InteriorColor       : NOC_CYAN1
        --          EdgeColor           : NOC_WHITE
        --          EdgeLineType        : TOL_SOLID
        --          EdgeWidth           : 1.0
        --          FrontMaterial       : NOM_BRASS
        --          BackMaterial        : NOM_BRASS
        --
        --          Display of back-facing filled polygons.
        --          No distinction between external and internal
        --          faces of FillAreas.
        --          The edges are not drawn.
        --          Polygon offset parameters: mode = Aspect_POM_None, factor = 1., units = 0.


        Create ( Interior       : InteriorStyle from Aspect;
                 InteriorColor  : Color from Quantity;
                 EdgeColor      : Color from Quantity;
                 EdgeLineType   : TypeOfLine from Aspect;
                 EdgeWidth      : Real from Standard;
                 FrontMaterial  : MaterialAspect from Graphic3d;
                 BackMaterial   : MaterialAspect from Graphic3d )
                returns mutable AspectFillArea3d from Graphic3d;

        ---Level: Public
        ---Purpose: Creates a context table for fill area primitives
        --          defined with the specified values.
        --
        --          Display of back-facing filled polygons.
        --          No distinction between external and internal
        --          faces of FillAreas.
        --          The edges are not drawn.
        --          Polygon offset parameters: mode = Aspect_POM_None, factor = 1., units = 0.
    	-- Warning
    	-- EdgeWidth is the "line width scale factor".   The
    	-- nominal line width is 1 pixel.   The width of the line is
    	-- determined by applying the line width scale factor to
    	-- this nominal line width.   The supported line widths
    	-- vary by 1-pixel units.

        ---------------------------------------------------
        -- Category: Methods to modify the class definition
        ---------------------------------------------------

        AllowBackFace ( me      : mutable )
                is static;
        ---Purpose: Allows the display of back-facing filled
        --          polygons.

        SetBackMaterial ( me            : mutable;
                          AMaterial     : MaterialAspect from Graphic3d )
                is static;
        ---Level: Public
        ---Purpose: Modifies the surface material of internal faces
        ---Category: Methods to modify the class definition

        SetDistinguishOn ( me   : mutable )
                is static;
        ---Level: Public
        ---Purpose: Allows distinction between external and internal
        --          faces of FillAreas.
        ---Category: Methods to modify the class definition

        SetDistinguishOff ( me  : mutable )
                is static;
        ---Level: Public
        ---Purpose: Forbids distinction between external and internal
        --          faces of FillAreas.
        ---Category: Methods to modify the class definition

        SetEdgeOn ( me  : mutable )
                is static;
        ---Level: Public
        ---Purpose: The edges of FillAreas are drawn.
        ---Category: Methods to modify the class definition

        SetEdgeOff ( me : mutable )
                is static;
        ---Level: Public
        ---Purpose: The edges of FillAreas are not drawn.
        ---Category: Methods to modify the class definition

        SetFrontMaterial ( me           : mutable;
                           AMaterial    : MaterialAspect from Graphic3d )
                is static;
        ---Level: Public
        ---Purpose: Modifies the surface material of external faces
        ---Category: Methods to modify the class definition

        SuppressBackFace ( me   : mutable )
                is static;
        ---Level: Public
        ---Purpose: Suppress the display of back-facing filled
        --          polygons.
        --          A back-facing polygon is defined as a polygon whose
        --          vertices are in a clockwise order with respect
        --          to screen coordinates.
        ---Category: Methods to modify the class definition

 
        SetTextureMap(me  :  mutable; 
                      ATexture  :  TextureMap  from Graphic3d);
 
        SetTextureMapOn(me  :  mutable);
        SetTextureMapOff(me :  mutable);

        SetDefaultDegenerateModel ( myclass;
                aModel     : TypeOfDegenerateModel from Aspect =
                                                Aspect_TDM_WIREFRAME;
                aRatio : Ratio from Quantity = 0.0);
        ---Level: Public
        ---Purpose: Sets the default model of degeneration for the polygons
        --      which is taking in account at creation time of any
        --      graphic structure until the model is change using
        --      SetDegenerateModel() method.
        ---Category: Methods to manage the structure degeneration

        SetDegenerateModel ( me : mutable;
                aModel     : TypeOfDegenerateModel from Aspect =
                                                Aspect_TDM_WIREFRAME;
                aRatio : Ratio from Quantity = 0.0);
        ---Level: Public
        ---Purpose: Sets the model of degeneration for the polygons
        --   according to the degenerate ratio >= 0. & <= 1. where :
        --   <aRatio> = 0. indicate that all polygons of the graphic structure
        --      are displayed.
        --   <aRatio> = 1. indicate that nothing is displayed in the graphic
        --      structure.
        --   When <ARatio> is > 0 & < 1. the corresponding amount
        --   of polygons are displayed in the graphic structure with a
        --   random method.     
        --  Warning: the degenerate structure is shown only when
        -- the animation and degenerate flags are set to TRUE
        -- in V3d_View::SetAnimationMode(..)
        ---Category: Methods to manage the structure degeneration
        
        -- 22-03-04 OCC4895 SAN High-level interface for controlling polygon offsets
        SetPolygonOffsets ( me : mutable;
                            aMode   : Integer from Standard;
                            aFactor : ShortReal from Standard = 1.0;
                            aUnits  : ShortReal from Standard = 0.0 );
        ---Level: Public
        ---Purpose: Sets up OpenGL polygon offsets mechanism.
        --          <aMode> parameter can contain various combinations of 
        --          Aspect_PolygonOffsetMode enumeration elements (Aspect_POM_None means
        --          that polygon offsets are not changed).
        --          If <aMode> is different from Aspect_POM_Off and Aspect_POM_None, then <aFactor> and <aUnits> 
        --          arguments are used by graphic renderer to calculate a depth offset value:
        --          
        --          offset = <aFactor> * m + <aUnits> * r, where
        --          m - maximum depth slope for the polygon currently being displayed,
        --          r - minimum window coordinates depth resolution (implementation-specific)
        --
        --          Deafult settings for OCC 3D viewer: mode = Aspect_POM_Fill, factor = 1., units = 0.
        --
        --          Negative offset values move polygons closer to the viewport,
        --          while positive values shift polygons away.
        --          Consult OpenGL reference for details (glPolygonOffset function description).
        ---Category: Methods to modify the class definition

        ----------------------------
        -- Category: Inquire methods
        ----------------------------

        BackFace ( me )
                returns Boolean from Standard
                is static;
        ---Level: Public
        ---Purpose: Returns the Back Face Removal status.
        --          Standard_True if SuppressBackFace is activated.
        ---Category: Inquire methods

        Distinguish ( me )
                returns Boolean from Standard
                is static;
        ---Level: Public
        ---Purpose: Returns the Distinguish Mode status.
        ---Category: Inquire methods

        Edge ( me )
                returns Boolean from Standard
                is static;
        ---Level: Public
        ---Purpose: Returns Standard_True if the edges are drawn and
        --          Standard_False if the edges are not drawn.
        ---Category: Inquire methods

        BackMaterial ( me )
                returns MaterialAspect from Graphic3d
                is static;
        ---Level: Public
        ---Purpose: Returns the surface material of internal faces
        ---Category: Inquire methods

        FrontMaterial ( me )
                returns MaterialAspect from Graphic3d
                is static;
        ---Level: Public
        ---Purpose: Returns the surface material of external faces
        ---Category: Inquire methods

 
        TextureMap(me) 
            returns  TextureMap  from  Graphic3d; 
             
        TextureMapState(me) 
            returns  Boolean  from  Standard;

        DegenerateModel ( me ;
                aRatio: out Ratio from Quantity )
                returns TypeOfDegenerateModel from Aspect;
        ---Level: Public
        ---Purpose: returns the current degeneration model and ratio
        --  for the polygons
        ---Category: Inquire methods

        DefaultDegenerateModel ( myclass ;
                aRatio: out Ratio from Quantity )
                returns TypeOfDegenerateModel from Aspect;
        ---Level: Public
        ---Purpose: returns the default degeneration model and ratio
        --  for the polygons
        ---Category: Inquire methods
        
        -- 22-03-04 OCC4895 SAN High-level interface for controlling polygon offsets
        PolygonOffsets ( me;
                         aMode   : out Integer from Standard;
                         aFactor : out ShortReal from Standard;
                         aUnits  : out ShortReal from Standard );
        ---Level: Public
        ---Purpose: Returns current polygon offsets settings.
        ---Category: Inquire methods    
        
        
--\f

fields

--
-- Class        :       Graphic3d_AspectFillArea3d
--
-- Purpose      :       Declaration of variables specific to
--                      the context of drawing 3d faces
--
-- Reminder     :       A context for drawing 3d faces inherits a context
--                      defined by :
--                      - the interior style of the face
--                      - the edge style of the face
--                      - the colour
--                      It also possesses a definition of the materials for the
--                      internal and external faces.
--
--


        -- flag to distinguish between internal and external faces
        DistinguishModeActive   :       Boolean from Standard;

        -- flag to draw the edges or not
        EdgeModeActive          :       Boolean from Standard;

        -- display flag for reversed polygons.
        BackFaceRemovalActive   :       Boolean from Standard;

        MyTextureMap            :       TextureMap  from  Graphic3d; 
        MyTextureMapState       :       Boolean  from  Standard;

        -- the material
        MyFrontMaterial         :       MaterialAspect from Graphic3d;
        MyBackMaterial          :       MaterialAspect from Graphic3d;

        -- the degenate model
        MyDegenerateModel       :       TypeOfDegenerateModel from Aspect;
        MyDegenerateRatio       :       Ratio from Quantity;
        
        -- 22-03-04 OCC4895 SAN High-level interface for controlling polygon offsets
        -- polygon offsets
        MyPolygonOffsetMode     :       Integer from Standard;
        MyPolygonOffsetFactor   :       ShortReal from Standard;
        MyPolygonOffsetUnits    :       ShortReal from Standard;

end AspectFillArea3d;
Commit	Line	Data
b311480e	1	-- Created on: 1991-11-04
	2	-- Created by: NW,JPB,CAL
	3	-- Copyright (c) 1991-1999 Matra Datavision
	4	-- Copyright (c) 1999-2012 OPEN CASCADE SAS
7fd59977	5	--
b311480e	6	-- The content of this file is subject to the Open CASCADE Technology Public
	7	-- License Version 6.5 (the "License"). You may not use the content of this file
	8	-- except in compliance with the License. Please obtain a copy of the License
	9	-- at http://www.opencascade.org and read it completely before using this file.
	10	--
	11	-- The Initial Developer of the Original Code is Open CASCADE S.A.S., having its
	12	-- main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France.
	13	--
	14	-- The Original Code and all software distributed under the License is
	15	-- distributed on an "AS IS" basis, without warranty of any kind, and the
	16	-- Initial Developer hereby disclaims all such warranties, including without
	17	-- limitation, any warranties of merchantability, fitness for a particular
	18	-- purpose or non-infringement. Please see the License for the specific terms
	19	-- and conditions governing the rights and limitations under the License.
	20
7fd59977	21	-- Modified: 1/08/97 ; PCT : Ajout texture mapping
	22	-- 16/01/98 ; FMN : Ajout Hiddenline
	23	-- 0312/99 ; GG : BUC60488 Why the field DistinguishModeActive
	24	-- field is not accessible properly ?
	25	-- workaround : Move the Material fields at end.
	26	-- 26/01/00 ; EUG/GG degeneration management (G003)
	27	-- Add SetDegenerateModel() and DegenerateModel() methods
	28	-- 29/09/00 ; GG degeneration management (G003)
	29	-- Add SetDefaultDegenerateModel() and DefaultDegenerateModel() methods
	30	-- 22/03/04 ; OCC4895 SAN High-level interface for controlling polygon offsets
7fd59977	31
	32	class AspectFillArea3d from Graphic3d inherits AspectFillArea from Aspect
	33
	34	---Version:
	35
	36	---Purpose: This class permits the creation and updating of
	37	-- a graphic attribute context for opaque 3d
	38	-- primitives (polygons, triangles, quadrilaterals)
	39	-- Keywords: Face, FillArea, Triangle, Quadrangle, Polygon,
	40	-- TriangleMesh, QuadrangleMesh, Edge, Border, Interior,
	41	-- Color, Type, Width, Style, Hatch, Material,
	42	-- BackFaceRemoval, DistinguishMode
	43
	44	---Warning:
	45	---References:
	46
	47	uses
	48
	49	Color from Quantity,
	50	Ratio from Quantity,
	51
	52	TypeOfLine from Aspect,
	53	InteriorStyle from Aspect,
	54	TypeOfDegenerateModel from Aspect,
	55
	56	MaterialAspect from Graphic3d,
	57	TextureMap from Graphic3d
	58
	59	is
	60
	61	Create
	62	returns mutable AspectFillArea3d from Graphic3d;
	63	---Level: Public
	64	---Purpose: Creates a context table for fill area primitives
	65	-- defined with the following default values:
	66	--
	67	-- InteriorStyle : IS_EMPTY
	68	-- InteriorColor : NOC_CYAN1
	69	-- EdgeColor : NOC_WHITE
	70	-- EdgeLineType : TOL_SOLID
	71	-- EdgeWidth : 1.0
	72	-- FrontMaterial : NOM_BRASS
	73	-- BackMaterial : NOM_BRASS
	74	--
	75	-- Display of back-facing filled polygons.
	76	-- No distinction between external and internal
	77	-- faces of FillAreas.
	78	-- The edges are not drawn.
	79	-- Polygon offset parameters: mode = Aspect_POM_None, factor = 1., units = 0.
	80
	81
	82	Create ( Interior : InteriorStyle from Aspect;
	83	InteriorColor : Color from Quantity;
	84	EdgeColor : Color from Quantity;
	85	EdgeLineType : TypeOfLine from Aspect;
	86	EdgeWidth : Real from Standard;
	87	FrontMaterial : MaterialAspect from Graphic3d;
	88	BackMaterial : MaterialAspect from Graphic3d )
	89	returns mutable AspectFillArea3d from Graphic3d;
	90
	91	---Level: Public
	92	---Purpose: Creates a context table for fill area primitives
	93	-- defined with the specified values.
	94	--
95	-- Display of back-facing filled polygons.
96	-- No distinction between external and internal
97	-- faces of FillAreas.
98	-- The edges are not drawn.
99	-- Polygon offset parameters: mode = Aspect_POM_None, factor = 1., units = 0.
100	-- Warning
101	-- EdgeWidth is the "line width scale factor". The
102	-- nominal line width is 1 pixel. The width of the line is
103	-- determined by applying the line width scale factor to
104	-- this nominal line width. The supported line widths
105	-- vary by 1-pixel units.
106
107	---------------------------------------------------
108	-- Category: Methods to modify the class definition
109	---------------------------------------------------
110
111	AllowBackFace ( me : mutable )
112	is static;
113	---Purpose: Allows the display of back-facing filled
114	-- polygons.
115
116	SetBackMaterial ( me : mutable;
117	AMaterial : MaterialAspect from Graphic3d )
118	is static;
119	---Level: Public
120	---Purpose: Modifies the surface material of internal faces
121	---Category: Methods to modify the class definition
122
123	SetDistinguishOn ( me : mutable )
124	is static;
125	---Level: Public
126	---Purpose: Allows distinction between external and internal
127	-- faces of FillAreas.
128	---Category: Methods to modify the class definition
129
130	SetDistinguishOff ( me : mutable )
131	is static;
132	---Level: Public
133	---Purpose: Forbids distinction between external and internal
134	-- faces of FillAreas.
135	---Category: Methods to modify the class definition
136
137	SetEdgeOn ( me : mutable )
138	is static;
139	---Level: Public
140	---Purpose: The edges of FillAreas are drawn.
141	---Category: Methods to modify the class definition
142
143	SetEdgeOff ( me : mutable )
144	is static;
145	---Level: Public
146	---Purpose: The edges of FillAreas are not drawn.
147	---Category: Methods to modify the class definition
148
149	SetFrontMaterial ( me : mutable;
150	AMaterial : MaterialAspect from Graphic3d )
151	is static;
152	---Level: Public
153	---Purpose: Modifies the surface material of external faces
154	---Category: Methods to modify the class definition
155
156	SuppressBackFace ( me : mutable )
157	is static;
158	---Level: Public
159	---Purpose: Suppress the display of back-facing filled
160	-- polygons.
161	-- A back-facing polygon is defined as a polygon whose
162	-- vertices are in a clockwise order with respect
163	-- to screen coordinates.
164	---Category: Methods to modify the class definition
165
166
167	SetTextureMap(me : mutable;
168	ATexture : TextureMap from Graphic3d);
169
170	SetTextureMapOn(me : mutable);
171	SetTextureMapOff(me : mutable);
172
173	SetDefaultDegenerateModel ( myclass;
174	aModel : TypeOfDegenerateModel from Aspect =
175	Aspect_TDM_WIREFRAME;
176	aRatio : Ratio from Quantity = 0.0);
177	---Level: Public
178	---Purpose: Sets the default model of degeneration for the polygons
179	-- which is taking in account at creation time of any
180	-- graphic structure until the model is change using
181	-- SetDegenerateModel() method.
182	---Category: Methods to manage the structure degeneration
183
184	SetDegenerateModel ( me : mutable;
185	aModel : TypeOfDegenerateModel from Aspect =
186	Aspect_TDM_WIREFRAME;
187	aRatio : Ratio from Quantity = 0.0);
188	---Level: Public
189	---Purpose: Sets the model of degeneration for the polygons
190	-- according to the degenerate ratio >= 0. & <= 1. where :
191	-- <aRatio> = 0. indicate that all polygons of the graphic structure
192	-- are displayed.
193	-- <aRatio> = 1. indicate that nothing is displayed in the graphic
194	-- structure.
195	-- When <ARatio> is > 0 & < 1. the corresponding amount
196	-- of polygons are displayed in the graphic structure with a
197	-- random method.
198	-- Warning: the degenerate structure is shown only when
199	-- the animation and degenerate flags are set to TRUE
200	-- in V3d_View::SetAnimationMode(..)
201	---Category: Methods to manage the structure degeneration
202
203	-- 22-03-04 OCC4895 SAN High-level interface for controlling polygon offsets
204	SetPolygonOffsets ( me : mutable;
205	aMode : Integer from Standard;
60be1f9b	206	aFactor : ShortReal from Standard = 1.0;
60be1f9b	207	aUnits : ShortReal from Standard = 0.0 );
7fd59977	208	---Level: Public
	209	---Purpose: Sets up OpenGL polygon offsets mechanism.
	210	-- <aMode> parameter can contain various combinations of
	211	-- Aspect_PolygonOffsetMode enumeration elements (Aspect_POM_None means
	212	-- that polygon offsets are not changed).
	213	-- If <aMode> is different from Aspect_POM_Off and Aspect_POM_None, then <aFactor> and <aUnits>
	214	-- arguments are used by graphic renderer to calculate a depth offset value:
	215	--
	216	-- offset = <aFactor> * m + <aUnits> * r, where
	217	-- m - maximum depth slope for the polygon currently being displayed,
	218	-- r - minimum window coordinates depth resolution (implementation-specific)
	219	--
	220	-- Deafult settings for OCC 3D viewer: mode = Aspect_POM_Fill, factor = 1., units = 0.
	221	--
	222	-- Negative offset values move polygons closer to the viewport,
	223	-- while positive values shift polygons away.
	224	-- Consult OpenGL reference for details (glPolygonOffset function description).
	225	---Category: Methods to modify the class definition
	226
	227	----------------------------
	228	-- Category: Inquire methods
	229	----------------------------
	230
	231	BackFace ( me )
	232	returns Boolean from Standard
	233	is static;
	234	---Level: Public
	235	---Purpose: Returns the Back Face Removal status.
	236	-- Standard_True if SuppressBackFace is activated.
	237	---Category: Inquire methods
	238
	239	Distinguish ( me )
	240	returns Boolean from Standard
	241	is static;
	242	---Level: Public
	243	---Purpose: Returns the Distinguish Mode status.
	244	---Category: Inquire methods
	245
	246	Edge ( me )
	247	returns Boolean from Standard
	248	is static;
	249	---Level: Public
	250	---Purpose: Returns Standard_True if the edges are drawn and
	251	-- Standard_False if the edges are not drawn.
	252	---Category: Inquire methods
	253
	254	BackMaterial ( me )
	255	returns MaterialAspect from Graphic3d
	256	is static;
	257	---Level: Public
	258	---Purpose: Returns the surface material of internal faces
	259	---Category: Inquire methods
	260
	261	FrontMaterial ( me )
	262	returns MaterialAspect from Graphic3d
	263	is static;
	264	---Level: Public
	265	---Purpose: Returns the surface material of external faces
	266	---Category: Inquire methods
	267
	268
	269	TextureMap(me)
	270	returns TextureMap from Graphic3d;
	271
272	TextureMapState(me)
273	returns Boolean from Standard;
274
275	DegenerateModel ( me ;
276	aRatio: out Ratio from Quantity )
277	returns TypeOfDegenerateModel from Aspect;
278	---Level: Public
279	---Purpose: returns the current degeneration model and ratio
280	-- for the polygons
281	---Category: Inquire methods
282
283	DefaultDegenerateModel ( myclass ;
284	aRatio: out Ratio from Quantity )
285	returns TypeOfDegenerateModel from Aspect;
286	---Level: Public
287	---Purpose: returns the default degeneration model and ratio
288	-- for the polygons
289	---Category: Inquire methods
290
291	-- 22-03-04 OCC4895 SAN High-level interface for controlling polygon offsets
292	PolygonOffsets ( me;
293	aMode : out Integer from Standard;
60be1f9b	294	aFactor : out ShortReal from Standard;
60be1f9b	295	aUnits : out ShortReal from Standard );
7fd59977	296	---Level: Public
	297	---Purpose: Returns current polygon offsets settings.
	298	---Category: Inquire methods
	299
	300
	301	--\f
	302
	303	fields
	304
	305	--
	306	-- Class : Graphic3d_AspectFillArea3d
	307	--
	308	-- Purpose : Declaration of variables specific to
	309	-- the context of drawing 3d faces
	310	--
	311	-- Reminder : A context for drawing 3d faces inherits a context
	312	-- defined by :
	313	-- - the interior style of the face
	314	-- - the edge style of the face
	315	-- - the colour
	316	-- It also possesses a definition of the materials for the
	317	-- internal and external faces.
	318	--
	319	--
	320
	321
	322	-- flag to distinguish between internal and external faces
	323	DistinguishModeActive : Boolean from Standard;
	324
	325	-- flag to draw the edges or not
	326	EdgeModeActive : Boolean from Standard;
	327
	328	-- display flag for reversed polygons.
	329	BackFaceRemovalActive : Boolean from Standard;
	330
	331	MyTextureMap : TextureMap from Graphic3d;
	332	MyTextureMapState : Boolean from Standard;
	333
	334	-- the material
	335	MyFrontMaterial : MaterialAspect from Graphic3d;
	336	MyBackMaterial : MaterialAspect from Graphic3d;
	337
	338	-- the degenate model
	339	MyDegenerateModel : TypeOfDegenerateModel from Aspect;
	340	MyDegenerateRatio : Ratio from Quantity;
	341
	342	-- 22-03-04 OCC4895 SAN High-level interface for controlling polygon offsets
	343	-- polygon offsets
	344	MyPolygonOffsetMode : Integer from Standard;
60be1f9b	345	MyPolygonOffsetFactor : ShortReal from Standard;
60be1f9b	346	MyPolygonOffsetUnits : ShortReal from Standard;
7fd59977	347
7fd59977	348	end AspectFillArea3d;