path: root/src/Visual3d/Visual3d_View.cdl

--
-- File:	Visual3d_View.cdl
-- Created:	Mardi 17 Septembre 1991
-- Author:	NW,JPB,CAL
--		05-97: CAL; Ajout du Clear sur les TOS_COMPUTED.
--		10-97: CAL; Retrait des DataStructure.
--		11-97: CAL; Retrait de la dependance avec math.Calcul developpe.
--		11-97: CAL; Ajout de NumberOfDisplayedStructures
--		05-98: CAL; Perfs. Connection entre structures COMPUTED.
--		16-09-98: BGN; Points d'entree du Triedre (S3819, Phase 1)
--              22-09-98: BGN; S3989 (anciennement S3819)
--                             TypeOfTriedron* from Aspect(et pas Visual3d)
--		02-12-98: S4062. Ajout des layers.
--		13-09-99: GG; GER61454 Adds LightLimit() and PlaneLimit() methods
--		10-11-99: GG; Add PRO19603 Redraw( area ) method
--		14-01-00: GG; Add IMP140100 ViewManager() method
--		25-01-00: EUG: G003
--			  -> Add backfacing management methods
--			       SetBackfacingModel() & BackfacingModel().
--			  -> Change SetAnimationModeIsOn() adding degenerate flag
--			  -> SetDegenerateModeOn() and Off() become private.
--			       Use instead SetComputedMode() for managing
--				HLR in the view.
--		THA  - 17/08/00 Thomas HARTL <t-hartl@muenchen.matra-dtv.fr>
--				-> Add Print methods (works only under Windows).-
--		GG - RIC120302 Add NEW SetWindow method.
--
--		30-04-02: JMB; MyDisplayedStructure is now a Map instead
--		               of a Set. Improves performance of Selection
--		               mechanisms
--

--              SAV  - 22/10/01 -> Add EnableDepthTest() & IsDepthTestEnabled() methods.
--              SAV  - 25/10/01 -> Add EnableGLLight() & IsGLLightEnabled() methods.
--              VSV - 28/05/02: ZBUFFER mode of Trihedron
--              SAV  - 23/12/02 Added methods too set background image
--
---Copyright:	MatraDatavision 1991,1992,1993,1994,2001
--

class View from Visual3d inherits DataStructureManager from Graphic3d

	---Version:

	---Purpose: Creation and edition of a view in a 3D visualiser.
	--	    A 3D view is composed of an "orientation" part defined
	--	    by the position of the observer, the direction of view,
	--	    and a "mapping" part defined by the type of projection
	--	    (parallel or perspective) and by the window-viewport
	--	    couple which allows passage from the projected coordinate
	--	    space into the screen space.
    	-- Summary of 3D Viewing
    	-- To define a view, you must define:
    	-- -   The view orientation transformation
    	-- -   The view mapping transformation
    	-- -   The view representation.
    	--  To activate a view, you must define:
    	-- -   The associated window.


uses

    Array2OfReal            from TColStd,

    Background              from Aspect,
    GradientBackground      from Aspect,
    GraphicDriver           from Aspect,
    Window                  from Aspect,
    TypeOfUpdate            from Aspect,
    TypeOfHighlightMethod   from Aspect,
    TypeOfTriedronEcho      from Aspect,
    TypeOfTriedronPosition  from Aspect,
    Handle                  from Aspect,
    RenderingContext        from Aspect,
    GraphicCallbackProc     from Aspect,
    ColorScale              from Aspect,
    PrintAlgo               from Aspect,

    CRawBufferData          from Image,

    CBitFields8             from Graphic3d,
    CView                   from Graphic3d,
    GraphicDriver           from Graphic3d,
    PtrFrameBuffer          from Graphic3d,
    Plotter                 from Graphic3d,
    Structure               from Graphic3d,
    SequenceOfStructure     from Graphic3d,
    MapOfStructure          from Graphic3d,

    ContextView             from Visual3d,
    ClipPlane               from Visual3d,
    Layer                   from Visual3d,
    Light                   from Visual3d,
    SetOfClipPlane          from Visual3d,
    SetOfLight              from Visual3d,
    TypeOfAnswer            from Visual3d,
    ViewMapping             from Visual3d,
    ViewOrientation         from Visual3d,
    ViewManager             from Visual3d,
    ViewManagerPtr          from Visual3d,

    TypeOfBackfacingModel   from Visual3d,

    NameOfColor             from Quantity,
    FillMethod              from Aspect,
    GradientFillMethod      from Aspect,
    ExportFormat            from Graphic3d,
    SortType                from Graphic3d,
    Color                   from Quantity,
    FontAspect              from OSD,
    AsciiString             from TCollection,
    ExtendedString          from TCollection,
    CGraduatedTrihedron     from Graphic3d

raises
    TransformError          from Visual3d,
    ViewDefinitionError     from Visual3d

is

	----------------------------------------------
	-- Summary of 3D Viewing                    --
	--                                          --
	-- To define a view, you must define        --
	--                                          --
	--	The view orientation transformation --
	--	The view mapping transformation     --
	--	The view representation.            --
	--                                          --
	-- To activate a view, you must define      --
	--                                          --
	--	The associated window.              --
	----------------------------------------------

	Create ( AManager	: mutable ViewManager from Visual3d )
		returns mutable View from Visual3d;
	---Level: Public
	---Purpose: Creates a view in the viewer <AManager> with a default
	--	    orientation and a default mapping.

	Create ( AManager	: mutable ViewManager from Visual3d;
		 VO		: ViewOrientation from Visual3d;
		 VM		: ViewMapping from Visual3d;
		 CTX		: ContextView from Visual3d )
		returns mutable View from Visual3d;
	---Level: Public
	---Purpose: Creates a view in the viewer <AManager> with the orientation
	--	    <VO>, the mapping <VM>, and the context<CTX>.

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

	Activate ( me	: mutable )
	---Level: Public
	---Purpose: Activates the view <me>.
	--	    Map the associated window on the screen and
	--	    post the view in this window.
	--  Category: Methods to modify the class definition
	--  Warning: Raises ViewDefinitionError if the associated
	--	    window isn't defined.
	raises ViewDefinitionError from Visual3d is static;

	Deactivate ( me	: mutable )
	---Level: Public
	---Purpose: Deactivates the view <me>.
	--	    Unmap the associated window on the screen and
	--	    unpost the view in this window.
	--  Category: Methods to modify the class definition
	--  Warning: Raises ViewDefinitionError if the associated
	--	    window isn't defined.
	raises ViewDefinitionError from Visual3d is static;

	Destroy ( me	: mutable )
		is redefined;
	---Level: Public
	---Purpose: Deletes and erases the view <me>.
	---Category: Methods to modify the class definition
	---C++: alias ~

	Redraw ( me	: mutable )
		is static;
	---Level: Public
	---Purpose: Updates screen in all cases.
	---Category: Methods to modify the class definition

	Redraw ( me	: mutable; x,y,width,height: Integer from Standard )
		is static;
	---Level: Public
	---Purpose: Updates screen area in all cases.
	-- area is given by his xy min corner and size in pixel coordinates
	---Category: Methods to modify the class definition

	Redraw ( me	: mutable;
		 AnUnderLayer	: Layer from Visual3d;
		 AnOverLayer	: Layer from Visual3d )
		is static;
	---Level: Internal
	---Purpose: Updates screen in all cases.
	---Category: Methods to modify the class definition

	Redraw ( me	: mutable;
		 AnUnderLayer	: Layer from Visual3d;
		 AnOverLayer	: Layer from Visual3d;
		 x,y,width,height: Integer from Standard )
		is static;
	---Level: Internal
	---Purpose: Updates screen area in all cases.
	-- area is given by his xy min corner and size in pixel coordinates
	---Category: Methods to modify the class definition

	Remove ( me	: mutable )
		is static;
	---Level: Public
	---Purpose: Deletes and erases the view <me>.
	--  Warning: No more graphic operations in <me> after this call.
	---Category: Methods to modify the class definition

	Resized ( me	: mutable )
	---Level: Public
	---Purpose: Updates the view <me> after the modification
	--	    of the associated window.
	--  Category: Methods to modify the class definition
	--  Warning: Raises ViewDefinitionError if the associated
	--	    window isn't defined.
	raises ViewDefinitionError from Visual3d is static;

	SetBackground ( me	: mutable;
			ABack	: Background from Aspect )
	---Level: Internal
	---Purpose: Modifies the default window background.
	--  Category: Methods to modify the class definition
	--  Warning: Raises ViewDefinitionError if the associated
	--	    window isn't defined.
	raises ViewDefinitionError from Visual3d is static;

	SetBackgroundImage( me : mutable; FileName : CString from Standard;
					  FillStyle : FillMethod from Aspect;
					  update    : Boolean from Standard )
	---Level: Internal
	---Purpose:
	--  Category: Methods to modify the class definition
	--  Warning: Raises ViewDefinitionError if the associated
	--	    window isn't defined.
	raises ViewDefinitionError from Visual3d is static;

	SetBgImageStyle( me : mutable; FillStyle : FillMethod from Aspect;
				       update    : Boolean from Standard )
	---Level: Internal
	---Purpose:
	--  Category: Methods to modify the class definition
	--  Warning: Raises ViewDefinitionError if the associated
	--	    window isn't defined.
	raises ViewDefinitionError from Visual3d is static;

	SetGradientBackground ( me	: mutable;
		        	ABack	: GradientBackground from Aspect;
				update  : Boolean from Standard )
	---Level: Internal
	---Purpose: Modifies the gradient window background.
	--  Category: Methods to modify the class definition
	--  Warning: Raises ViewDefinitionError if the associated
	--	    window isn't defined.
	raises ViewDefinitionError from Visual3d is static;

	SetBgGradientStyle( me : mutable;
                            FillStyle : GradientFillMethod from Aspect;
                            update    : Boolean from Standard )
	---Level: Internal
	---Purpose:
	--  Category: Methods to modify the class definition
	--  Warning: Raises ViewDefinitionError if the associated
	--	    window isn't defined.
	raises ViewDefinitionError from Visual3d is static;

        SetBackFacingModel ( me     : mutable;
     			aModel : TypeOfBackfacingModel from Visual3d
    	) is static;
     	---Level   : Public
     	---Purpose : Manages display of the back faces

    	BackFacingModel ( me )
     	returns TypeOfBackfacingModel from Visual3d is static;
     	---Level   : Public
     	---Purpose : Returns current state of the back faces display

	SetContext ( me		: mutable;
		     CTX	: ContextView from Visual3d )
		is static;
	---Level: Public
	---Purpose: Sets the context <CTX> in the view <me>.
	---Category: Methods to modify the class definition

	SetTransform ( me	: mutable;
		       AMatrix	: Array2OfReal from TColStd )
	---Level: Internal
	---Purpose: Sets the transformation matrix that is applied
	--          to <MyViewOrientation> field of the view <me>.
	--
	--	    <AMatrix> is defined as a 4*4 real matrix.
	--
	--		-------------------
	--		| a11 a12 a13  t1 |
	--		| a21 a22 a23  t2 |
	--		| a31 a32 a33  t3 |
	--		|  0   0   0   1  |
	--		-------------------
	--
	--  Category: Methods to modify the class definition
	--  Warning: Raises TransformError if the matrix isn't a 4x4 matrix.
	raises TransformError from Visual3d is static;

	SetViewMapping ( me	: mutable;
			 VM	: ViewMapping from Visual3d )
		is static;
	---Level: Public
	---Purpose: Modifies the mapping of the view <me>.
	---Category: Methods to modify the class definition

	SetViewMappingDefault ( me	: mutable )
		is static;
	---Level: Public
	---Purpose: Saves the current mapping which will be the
	--	    reference value for the reset of the mapping
	--	    done by the ViewmappingReset method.
	---Category: Methods to modify the class definition

	SetViewOrientation ( me	: mutable;
			     VO	: ViewOrientation from Visual3d )
		is static;
	---Level: Public
	---Purpose: Modifies the orientation of <me>.
	---Category: Methods to modify the class definition

	SetViewOrientationDefault ( me	: mutable )
		is static;
	---Level: Public
	---Purpose: Saves the current orientation which will be the
	--	    reference value for the reset of the orientation
	--	    done by the ViewOrientationReset method.
	---Category: Methods to modify the class definition

	SetWindow ( me		: mutable;
		    AWindow	: Window from Aspect )
	---Level: Public
	---Purpose: Associates the window <AWindow> to the view <me>.
	--	    No new association if the window is already defined.
	--  Category: Methods to modify the class definition
	--  Warning: Raises ViewDefinitionError if it is impossible
	--	    to associate a view and a window.
	--	    (association already done or another problem)
	--	    Modifies the viewmapping of the associated view
	--	    when it calls the SetRatio method.
	raises ViewDefinitionError from Visual3d is static;
	---Purpose:
	--	    After this call, each view is mapped in an unique window.
	--
	-- Programming example :
	--
	-- An example when we have 1 view and 1 window
	-- -------------------------------------------
	--
	-- // Define a graphic device
	-- Handle(Graphic3d_GraphicDevice) GD =
	--			new Graphic3d_GraphicDevice ("dummy:0.0");
	--
	-- // Define a view manager
	-- Handle(Visual3d_ViewManager) VM = new Visual3d_ViewManager (GD);
	--
	-- // Define a view
	-- Handle(Visual3d_View) V = new Visual3d_View (VM);
	--
	-- // Define a window
	-- Handle(Xw_Window) W = new Xw_Window
	--	(GD, "Graphic View 1", 0.695, 0.695, 0.600, 0.600,
	--		Xw_WQ_3DQUALITY, Quantity_NOC_MATRAGRAY);
	--
	-- // Associate the view and the window
	-- V->SetWindow (W);
	--
	-- // Map the window
	-- W->Map ();
	--
	-- // Activate the view
	-- V->Activate ();
	--

	SetWindow ( me		: mutable;
		    AWindow	: Window from Aspect;
		    AContext: RenderingContext from Aspect;
		    ADisplayCB: GraphicCallbackProc from Aspect;
		    AClientData: Address from Standard
		  )
	---Level: Public
	---Purpose: Associates the window <AWindow> and context <AContext>
	--	    to the view <me>.
	--	    If <AContext> is not NULL the graphic context is used
        --          directly to draw something in this view.
	--	    Otherwise an internal context is created.
        --          If <ADisplayCB> is not NULL then a user display CB is
        --          call at the end of the OCC graphic traversal and just
        --          before the swap of buffers. The <aClientData> is pass
        --          to this call back.
	--	    No new association if the window is already defined.
	--  Category: Methods to modify the class definition
	--  Warning: Raises ViewDefinitionError if it is impossible
	--	    to associate a view and a window.
	--	    (association already done or another problem)
	--	    Modifies the viewmapping of the associated view
	--	    when it calls the SetRatio method.
	raises ViewDefinitionError from Visual3d is static;
	---Purpose:
	--	    After this call, each view is mapped in an unique window.
	--
	-- Programming example :
	--
	-- An example when we have 1 view and 1 widget
	-- -------------------------------------------
	--
	-- // Define a graphic device
	-- Handle(Graphic3d_GraphicDevice) GD =
	--			new Graphic3d_GraphicDevice ("dummy:0.0");
	--
	-- // Define a view manager
	-- Handle(Visual3d_ViewManager) VM = new Visual3d_ViewManager (GD);
	--
	-- // Define a view
	-- Handle(Visual3d_View) V = new Visual3d_View (VM);
	--
	-- // Define a widget
	-- Widget DA = GLwCreateMDrawingArea (Widget parent, char *name,
        --                             ArgList arglist, Cardinal argcount);
	-- Handle(Xw_Window) W = new Xw_Window(DA);
	--
	-- // Define the graphic context
	-- GLXContext CTX = glXCreateContext(...)
	-- // Define the graphic call back and client data
	-- Handle(Object_View) myObject = new Object_View(...);
	-- static void DisplayCallback( Window w, XtPointer client_data,
	--			XtPointer call_data)
	-- { .... }
	-- // Associate the view and the widget
	-- V->SetWindow (W, CTX, DisplayCallback, myObject);
	--
	-- // Activate the view
	-- V->Activate ();
	--

	Update ( me	: mutable )
		is static;
	---Level: Public
	---Purpose: Updates screen in function of modifications of
	--	    the structures.
	---Category: Methods to modify the class definition

	Update ( me		: mutable;
		 AnUnderLayer	: Layer from Visual3d;
		 AnOverLayer	: Layer from Visual3d )
		is static;
	---Level: Internal
	---Purpose: Updates screen in function of modifications of
	--	    the structures.
	---Category: Methods to modify the class definition

	ViewMappingReset ( me	: mutable )
		is static;
	---Level: Public
	---Purpose: Sets the value of the mapping to be the same as
	--	    the mapping saved by the SetViewMappingDefaut method.
	---Category: Methods to modify the class definition

	ViewOrientationReset ( me	: mutable )
		is static;
	---Level: Public
	---Purpose: Sets the value of the orientation to be the same as the
	--	    orientation saved by the SetViewOrientationDefaut method.
	---Category: Methods to modify the class definition

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

	SetAnimationModeOn ( me	: mutable;
		degenerate : Boolean from Standard = Standard_False )
		is static;
	---Level: Advanced
	---Purpose: Activates animation mode with an optional degeneration
	--	according to the TypeOfDegenerateModel of each graphic structure
	--	When the animation mode is activated in the view,
	--	all Graphic3d_Structure are stored in a graphic object.
	--  Warning: only ONE view may have animation mode turned on
	--	at same time.
	---Category: Methods to modify the class definition

	SetAnimationModeOff ( me	: mutable )
		is static;
	---Level: Advanced
	---Purpose: Deactivates the animation mode.
	---Category: Methods to modify the class definition

	AnimationModeIsOn ( me )
		returns Boolean from Standard
		is static;
	---Level: Advanced
	---Purpose: Returns the activity of the animation mode.
	---Category: Inquire methods

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

	SetDegenerateModeOn ( me	: mutable )
		is static private;
	---Level: Advanced
	---Purpose: Activates degenerate mode.
	--	When the degenerate mode is activated in the view,
	--	all Graphic3d_Structure with the type TOS_COMPUTED
	--	displayed in this view are not computed.
	---Category: Methods to modify the class definition

	SetDegenerateModeOff ( me	: mutable )
		is static private;
	---Level: Advanced
	---Purpose: Deactivates the degenerate mode.
	---Category: Methods to modify the class definition

	DegenerateModeIsOn ( me )
		returns Boolean from Standard
		is static;
	---Level: Advanced
	---Purpose: Returns the activity of the degenerate mode.
	---Category: Inquire methods

    	SetComputedMode ( me : mutable; aMode : Boolean from Standard ) is static;
    	---Level: Advanced
    	---Purpose: Switches computed HLR mode in the view
    	---Category: Methods to modify the class definition

    	ComputedMode ( me ) returns Boolean from Standard is static;
    	---Level: Advanced
    	---Purpose: Returns the computed HLR mode state
    	---Category: Inquire methods

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

	ZBufferTriedronSetup ( me  : mutable;
	    	    	       XColor  : NameOfColor from Quantity = Quantity_NOC_RED;
		    	       YColor  : NameOfColor from Quantity = Quantity_NOC_GREEN;
    	    	       	       ZColor  : NameOfColor from Quantity = Quantity_NOC_BLUE1;
			       SizeRatio : Real from Standard = 0.8;
			       AxisDiametr : Real from Standard = 0.05;
			       NbFacettes  : Integer from Standard = 12)
		 is static;
        ---Level: Advanced
        ---Purpose: Customization of the ZBUFFER Triedron.
        ---         Initializes Colors of X Y and axis
        ---         Scale ratio defines decreasing of trihedron size when
    	---         its position is out of a View

	TriedronDisplay ( me		: mutable;
                          APosition     : TypeOfTriedronPosition from Aspect  = Aspect_TOTP_CENTER;
                          AColor	: NameOfColor from Quantity = Quantity_NOC_WHITE ;
                          AScale   	: Real from Standard  =  0.02;
    	    	    	  AsWireframe   : Boolean from Standard = Standard_True )
		is static;
	---Level: Public
	---Purpose: Display of the Triedron.
	---         Initialize position, color and length of Triedron axes.
        ---         The scale is a percent of the window width.
	---         If AsWireframe is FALSE triedron is shown in shaded mode
	---         AColor is not considered for ZBUFFER mode
	---Category:

	TriedronErase ( me		: mutable )
		is static;
	---Level: Public
	---Purpose: Erases the Triedron.
	---Category:

	TriedronEcho ( me	: mutable;
		       AType	: TypeOfTriedronEcho from Aspect  = Aspect_TOTE_NONE )
		is static;
	---Level: Public
	---Purpose: Highlights the echo zone of the Triedron.
	---Category:

    ------------------------------------------
    ---Category: Graduated trihedron
    ------------------------------------------

    GetGraduatedTrihedron(me;
                          -- Names of axes --
                          xname, yname, zname : out ExtendedString from TCollection;
                          -- Draw names --
                          xdrawname, ydrawname, zdrawname : out Boolean from Standard;
                          -- Draw values --
                          xdrawvalues, ydrawvalues, zdrawvalues : out Boolean from Standard;
                          -- Draw grid --
                          drawgrid : out Boolean from Standard;
                          -- Draw axes --
                          drawaxes : out Boolean from Standard;
                          -- Number of splits along axes --
                          nbx, nby, nbz : out Integer from Standard;
                          -- Offset for drawing values --
                          xoffset, yoffset, zoffset : out Integer from Standard;
                          -- Offset for drawing names of axes --
                          xaxisoffset, yaxisoffset, zaxisoffset : out Integer from Standard;
                          -- Draw tickmarks --
                          xdrawtickmarks, ydrawtickmarks, zdrawtickmarks : out Boolean from Standard;
                          -- Length of tickmarks --
                          xtickmarklength, ytickmarklength, ztickmarklength : out Integer from Standard;
                          -- Grid color --
                          gridcolor : out Color from Quantity;
                          -- Colors of axis names --
                          xnamecolor, ynamecolor, znamecolor : out Color from Quantity;
                          -- Colors of axis and values --
                          xcolor, ycolor, zcolor : out Color from Quantity;
                          -- Name of font for names of axes --
                          fontOfNames : out AsciiString from TCollection;
                          -- Style of names of axes --
                          styleOfNames : out FontAspect from OSD;
                          -- Size of names of axes --
                          sizeOfNames : out Integer from Standard;
                          -- Name of font for values --
                          fontOfValues : out AsciiString from TCollection;
                          -- Style of values --
                          styleOfValues : out FontAspect from OSD;
                          -- Size of values --
                          sizeOfValues : out Integer from Standard)
    returns Boolean from Standard
    is static;
    ---Purpose: Returns data of a graduated trihedron if displayed (return value is True)

    GraduatedTrihedronDisplay(me : mutable;
                              -- Names of axes --
                              xname, yname, zname : ExtendedString from TCollection;
                              -- Draw names --
                              xdrawname, ydrawname, zdrawname : Boolean from Standard;
                              -- Draw values --
                              xdrawvalues, ydrawvalues, zdrawvalues : Boolean from Standard;
                              -- Draw grid --
                              drawgrid : Boolean from Standard;
                              -- Draw axes --
                              drawaxes : Boolean from Standard;
                              -- Number of splits along axes --
                              nbx, nby, nbz : Integer from Standard;
                              -- Offset for drawing values --
                              xoffset, yoffset, zoffset : Integer from Standard;
                              -- Offset for drawing names of axes --
                              xaxisoffset, yaxisoffset, zaxisoffset : Integer from Standard;
                              -- Draw tickmarks --
                              xdrawtickmarks, ydrawtickmarks, zdrawtickmarks : Boolean from Standard;
                              -- Length of tickmarks --
                              xtickmarklength, ytickmarklength, ztickmarklength : Integer from Standard;
                              -- Grid color --
                              gridcolor : Color from Quantity;
                              -- Colors of axis names --
                              xnamecolor, ynamecolor, znamecolor : Color from Quantity;
                              -- Colors of axis and values --
                              xcolor, ycolor, zcolor : Color from Quantity;
                              -- Name of font for names of axes --
                              fontOfNames : AsciiString from TCollection;
                              -- Style of names of axes --
                              styleOfNames : FontAspect from OSD;
                              -- Size of names of axes --
                              sizeOfNames : Integer from Standard;
                              -- Name of font for values --
                              fontOfValues : AsciiString from TCollection;
                              -- Style of values --
                              styleOfValues : FontAspect from OSD;
                              -- Size of values --
                              sizeOfValues : Integer from Standard)
    ---Purpose: Displays a graduated trihedron.
    is static;

    GraduatedTrihedronErase(me : mutable)
    ---Purpose: Erases a graduated trihedron from the view.
    is static;

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

	Background ( me )
		returns Background from Aspect
		is static;
	---Level: Internal
	---Purpose: Returns the value of the default window background.

	GradientBackground ( me )
		returns GradientBackground from Aspect
		is static;
	---Level: Internal
	---Purpose: Returns the value of the window background.

	ContainsFacet ( me )
		returns Boolean from Standard
		is static;
	---Level: Public
	---Purpose: Returns Standard_True if one of the structures
	--	    displayed in the view <me> contains Polygons,
	--	    Triangles or Quadrangles.

	ContainsFacet ( me;
			ASet	: MapOfStructure from Graphic3d )
		returns Boolean from Standard
		is static;
	---Level: Public
	---Purpose: Returns Standard_True if one of the structures
	--	    in the set <ASet> contains Polygons, Triangles
	--	    or Quadrangles.

	Context ( me )
		returns ContextView from Visual3d
		is static;
	---Level: Public
	---Purpose: Returns the current context of the view <me>.
	---C++: return const &

	DisplayedStructures ( me; SG: in out MapOfStructure from Graphic3d )
		is static;
	---Level: Internal
	---Purpose: Returns the set of structures displayed in
	--	    the view <me>.

	IsActive ( me )
		returns Boolean from Standard
		is static;
	---Level: Public
	---Purpose: Returns the activity flag of the view <me>.

	IsDefined ( me )
		returns Boolean from Standard
		is static;
	---Level: Public
	---Purpose: Returns True if the window associated to the view
	--	    <me> is defined.

	IsDeleted ( me )
		returns Boolean from Standard
		is static;
	---Level: Public
	---Purpose: Returns Standard_True is the view <me> is deleted.
	--	    <me> is deleted after the call Remove (me).
	---Category: Inquire methods

	MinMaxValues ( me;
		       XMin, YMin, ZMin	: out Real from Standard;
		       XMax, YMax, ZMax	: out Real from Standard )
		is static;
	---Level: Public
	---Purpose: Returns the coordinates of the boundary box of all
	--	    structures displayed in the view <me>.

	MinMaxValues ( me;
		       ASet		: MapOfStructure from Graphic3d;
		       XMin, YMin, ZMin	: out Real from Standard;
		       XMax, YMax, ZMax	: out Real from Standard )
		is static;
	---Level: Public
	---Purpose: Returns the coordinates of the boundary box of all
	--	    structures in the set <ASet>.

	MinMaxValues ( me : mutable;
		       XMin, YMin	: out Real from Standard;
		       XMax, YMax	: out Real from Standard )
		is static;
	---Level: Public
	---Purpose: Returns the coordinates of the projection of the
	--	    boundary box of all structures displayed in the view <me>.

	MinMaxValues ( me : mutable;
		       ASet		: MapOfStructure from Graphic3d;
		       XMin, YMin	: out Real from Standard;
		       XMax, YMax	: out Real from Standard )
		is static;
	---Level: Public
	---Purpose: Returns the coordinates of the projection of the
	--	    boundary box of all structures in the set <ASet>.

	NumberOfDisplayedStructures ( me )
		returns Integer from Standard
		is static;
	---Level: Internal
	---Purpose: Returns number of displayed structures in
	--	    the view <me>.

	Projects ( me : mutable;
		   AX, AY, AZ		: Real from Standard;
		   APX, APY, APZ	: out Real from Standard )
		is static;
	---Level: Public
	---Purpose: Returns the coordinates of the projection of the
	--	    3d coordinates <AX>, <AY>, <AZ>.

	Transform ( me )
		returns Array2OfReal from TColStd
		is static;
	---Level: Public
	---Purpose: Returns the transformation associated to the view <me>
	---C++: return const &

	ViewMapping ( me )
		returns ViewMapping from Visual3d
		is static;
	---Level: Public
	---Purpose: Returns the current mapping of the view <me>.

	ViewMappingDefault ( me )
		returns ViewMapping from Visual3d
		is static;
	---Level: Public
	---Purpose: Returns the current reset mapping of the view <me>.

	ViewOrientation ( me )
		returns ViewOrientation from Visual3d
		is static;
	---Level: Public
	---Purpose: Returns the current orientation of the view <me>.

	ViewOrientationDefault ( me )
		returns ViewOrientation from Visual3d
		is static;
	---Level: Public
	---Purpose: Returns the current reset orientation of the view <me>.

	Window ( me )
		returns Window from Aspect
	---Level: Public
	---Purpose: Returns the window associated to the view <me>.
	--  Warning: Raises ViewDefinitionError if the associated
	--	    window isn't defined.
	raises ViewDefinitionError from Visual3d is static;

	LightLimit ( me ) returns Integer is static;
	---Level: Public
	---Purpose: Returns the MAX number of light associated to the view <me>.

	PlaneLimit ( me ) returns Integer is static;
	---Level: Public
	---Purpose: Returns the MAX number of clipping planes
	-- associated to the view <me>.

	ViewManager ( me ) returns ViewManager from Visual3d is static;
	---Level: Advanced
	---Purpose: Returns the view manager handle which manage this view

	----------------------------
	-- Category: Private methods
	----------------------------

	AcceptDisplay ( me;
			AStructure	: Structure from Graphic3d )
		returns TypeOfAnswer from Visual3d
		is static private;
	---Level: Internal
	---Purpose: Is it possible to display the structure
	--	    <AStructure> in the view <me> ?
	---Category: Private methods

	ReCompute ( me	: mutable;
		    AStructure	: Structure from Graphic3d );
	---Level: Advanced
	---Purpose: Computes the new presentation of the
	--	    structure <AStructure> displayed in <me>
	--	    with the type Graphic3d_TOS_COMPUTED.
	---Category: Private methods

	Compute ( me	: mutable ) is static private;
	---Level: Internal
	---Purpose: Computes the new presentation of the
	--	    Structures displayed in <me> with the type
	--	    Graphic3d_TOS_COMPUTED.
	---Category: Private methods

	ChangeDisplayPriority ( me		: mutable;
				AStructure	: Structure from Graphic3d;
				OldPriority	: Integer from Standard;
				NewPriority	: Integer from Standard )
		is static private;
	---Level: Internal
	---Purpose: Changes the display priority of the structure <AStructure>.
	---Category: Private methods

	Clear ( me		: mutable;
		AStructure	: Structure from Graphic3d;
		WithDestruction	: Boolean from Standard )
		is static private;
	---Level: Internal
	---Purpose: Clears the structure <AStructure> to the view <me>.
	---Category: Private methods

	Connect ( me		: mutable;
		  AMother	: Structure from Graphic3d;
		  ADaughter	: Structure from Graphic3d )
		is static private;
	---Level: Internal
	---Purpose: Connects the structures <AMother> and <ADaughter>.
	---Category: Private methods

	Disconnect ( me		: mutable;
		     AMother	: Structure from Graphic3d;
		     ADaughter	: Structure from Graphic3d )
		is static private;
	---Level: Internal
	---Purpose: Disconnects the structures <AMother> and <ADaughter>.
	---Category: Private methods

	Display ( me		: mutable;
		  AStructure	: Structure from Graphic3d )
		is static private;
	---Level: Internal
	---Purpose: Display the structure <AStructure> to the view <me>.
	---Category: Private methods

	Display ( me		: mutable;
		  AStructure	: Structure from Graphic3d;
		  AnUpdateMode  : TypeOfUpdate from Aspect )
		is static private;
	---Level: Internal
	---Purpose: Display the structure <AStructure> to the view <me>.
	---Category: Private methods

	Erase ( me		: mutable;
		AStructure	: Structure from Graphic3d )
		is static private;
	---Level: Internal
	---Purpose: Erases the structure <AStructure> from the view <me>.
	---Category: Private methods

	Erase ( me		: mutable;
		AStructure	: Structure from Graphic3d;
		AnUpdateMode	: TypeOfUpdate from Aspect )
		is static private;
	---Level: Internal
	---Purpose: Erases the structure <AStructure> from the view <me>.
	---Category: Private methods

	Exploration ( me )
		is static;
	---Level: Internal
	---Purpose: Prints informations about the view <me>.
	---Category: Private methods

	Highlight ( me			: mutable;
		    AStructure		: Structure from Graphic3d;
		    AMethod		: TypeOfHighlightMethod from Aspect )
		is static private;
	---Level: Internal
	---Purpose: Highlights the structure <AStructure> in the view <me>.
	---Category: Private methods

	SetTransform ( me		: mutable;
		       AStructure	: Structure from Graphic3d;
		       ATrsf		: Array2OfReal from TColStd )
		is static private;
	---Level: Internal
	---Purpose: Transforms the structure <AStructure> in the view <me>.
	---Category: Private methods

	UnHighlight ( me		: mutable;
		      AStructure	: Structure from Graphic3d )
		is static private;
	---Level: Internal
	---Purpose: Suppress the highlighting on the structure <AStructure>
	--	    in the view <me>.
	---Category: Private methods

	IsComputed ( me;
		     AStructure	: Structure from Graphic3d )
		returns Integer from Standard
		is static private;
	---Level: Internal
	---Purpose: Returns an index != 0 if the structure <AStructure>
	--	    have another structure computed for the view <me>.
	---Category: Private methods

	Identification ( me )
		returns Integer from Standard
		is static;
	---Level: Internal
	---Purpose: Returns the identification number of the view <me>.
	---Category: Private methods

	IsDisplayed ( me;
		      AStructure	: Structure from Graphic3d )
		returns Boolean from Standard
		is static private;
	---Level: Internal
	---Purpose: Returns true if the structure <AStructure> is
	--	    displayed in the view <me>.
	---Category: Private methods

	MatrixOfMapping ( me	: mutable )
		returns Array2OfReal from TColStd
		is static; -- private;
	---C++: return const &
	---Level: Internal
	---Purpose: Returns the current matrix of mapping of the view <me>.
	--  Warning: Stores the current matrix of mapping.

	MatrixOfOrientation ( me	: mutable )
		returns Array2OfReal from TColStd
		is static; -- private;
	---C++: return const &
	---Level: Internal
	---Purpose: Returns the current matrix of orientation of the view <me>.
	--  Warning: Stores the current matrix of orientation.

	SetRatio ( me	: mutable )
		is static private;
	---Level: Internal
	---Purpose: Modifies the aspect ratio of the view <me> when the
	--	    associated window is defined or resized.
	---Category: Private methods

	UpdateLights ( me	: mutable )
		is static private;
	---Level: Internal
	---Purpose: Updates the lights when the associated window is defined
	--	    and when the view is activated.
	---Category: Private methods

	UpdatePlanes ( me	: mutable )
		is static private;
	---Level: Internal
	---Purpose: Updates the planes when the associated window is defined
	--	    and when the view is activated.
	---Category: Private methods

	UpdateView ( me	: mutable )
		is static private;
	---Level: Internal
	---Purpose: Updates the associated c structure before a call to the
	--	    graphic library.
	---Category: Private methods

	-----------------------------
	-- Category: Internal methods
	-----------------------------

	CView ( me )
		returns Address from Standard
		is static;
	---Level: Internal
	---Purpose: Returns the c structure associated to <me>.
	---Category: Private methods

	GraphicDriver ( me )
		returns GraphicDriver from Aspect
		is static;
	---Level: Internal
	---Purpose: Returns the associated GraphicDriver.
	---Category: Internal methods

	HaveTheSameOwner ( me;
			   AStructure	: Structure from Graphic3d )
		returns Integer from Standard
		is static private;
	---Level: Internal
	---Purpose: Returns an index != 0 if the structure <AStructure>
	--	    have the same owner than another structure in the
	--	    sequence of the computed structures.
	---Category: Private methods

	Plot ( me;
	       APlotter	: Plotter from Graphic3d )
		is static;
	---Level: Internal
	---Purpose: Calls the method Plot for each Structure
	--	    displayed in <me>.
	---Category: Private methods

	  Print (me; AnUnderLayer : Layer from Visual3d;
		 AnOverLayer	  : Layer from Visual3d;
		 hPrnDC           : Handle from Aspect;
		 showBackground   : Boolean;
		 filename         : CString;
		 printAlgorithm   : PrintAlgo from Aspect = Aspect_PA_STRETCH;
                 theScaleFactor   : Real from Standard = 1.0)
	  returns Boolean from Standard is static;

      	---Level: Internal
      	---Purpose: print the contents of all layers of the view to the printer.
	-- <hPrnDC> : Pass the PrinterDeviceContext (HDC),
	-- <showBackground> : When set to FALSE then print the view without background color
	-- (background is white)
      	-- else set to TRUE for printing with current background color.
	-- <filename>: If != NULL, then the view will be printed to a file.
	-- <printAlgo>: Select print algorithm: stretch, tile.
        -- <theScaleFactor>: Scaling coefficient, used internally to scale the
        -- printings accordingly to the scale factor selected in the printer 
        -- properties dialog.
        -- Returns Standard_True if the data is passed to the printer, otherwise
        -- Standard_False if the print operation failed due to printer error
        -- or insufficient memory.
	--  Warning: Works only under Windows.

	  Print (me; hPrnDC     : Handle from Aspect;
		 showBackground : Boolean;
		 filename       : CString;
		 printAlgorithm : PrintAlgo from Aspect = Aspect_PA_STRETCH;
                 theScaleFactor : Real from Standard = 1.0 )
	  returns Boolean from Standard is static;

      	---Level: Internal
      	---Purpose: print the contents of the view to printer.
	-- <hPrnDC> : Pass the PrinterDeviceContext (HDC),
	-- <showBackground> : When set to FALSE then print the view without background color
	-- (background is white)
      	-- else set to TRUE for printing with current background color.
	-- <filename>: If != NULL, then the view will be printed to a file.
	-- <printAlgo>: Select print algorithm: stretch, tile.
        -- <theScaleFactor>: Scaling coefficient, used internally to scale the
        -- printings accordingly to the scale factor selected in the printer 
        -- properties dialog.
        -- Returns Standard_True if the data is passed to the printer, otherwise
        -- Standard_False if the print operation failed due to printer error
        -- or insufficient memory.
	--  Warning: Works only under Windows.

	SetTransparency ( me : mutable;
		AFlag : Boolean from Standard )
		is static;
	---Level: Advanced
	---Purpose: if <AFlag> is Standard_True then the transparency
	--	    is managed in the view <me>.
	--	    Default Standard_False
	---Category: Internal methods

	ZBufferIsActivated ( me )
		returns Boolean from Standard
		is static;
	---Level: Advanced
	---Purpose: Returns Standard_True if the ZBuffer is activated
	--	    in the view <me> and Standard_False if not.
	---Category: Internal methods

	SetZBufferActivity ( me : mutable; AnActivity : Integer from Standard )
		is static;
	---Level: Advanced
	---Purpose: Activates the ZBuffer if the integer <AnActivity>
	--	    is equal to 1.
	--	    Deactivates the ZBuffer if the integer <AnActivity>
	--	    is equal to 0.
	--	    If the integer <AnActivity> is equal to -1 then
	--	    - the ZBuffer is activated if
	--		me->Context ().Visualization () == Visual3d_TOV_SHADING
	--	    - the ZBuffer is deactivated if
	--		me->Context ().Visualization () == Visual3d_TOV_WIREFRAME
	---Category: Internal methods

	UnderLayer ( me )
		returns Layer from Visual3d;
	---Level: Internal
	---Purpose: Returns the underlay of the view <me>.
	---Category: Private methods
	---C++: return const &

	OverLayer ( me )
		returns Layer from Visual3d;
	---Level: Internal
	---Purpose: Returns the underlay of the view <me>.
	---Category: Private methods
	---C++: return const &

    	EnableDepthTest( me; enable : Boolean from Standard )
    	is static;
	---Level: Public
	---Purpose: turns on/off opengl depth

    	IsDepthTestEnabled( me ) returns Boolean from Standard
    	is static;
	---Level: Public
	---Purpose: returns current state of the opengl depth testing

    	ReadDepths( me; x,y,width,height: Integer from Standard;
    	    	    	buffer : Address )
	is static;
	---Purpose: Reads depths of shown pixels of the given rectangle

        FBOCreate( me : mutable; width,height: Integer from Standard )
                  returns PtrFrameBuffer from Graphic3d
        is static;
        ---Level: Public
        ---Purpose: Generate offscreen FBO in the graphic library

        FBORelease( me     : mutable;
                    fboPtr : in out PtrFrameBuffer from Graphic3d )
        is static;
        ---Level: Public
        ---Purpose: Remove offscreen FBO from the graphic library

        FBOGetDimensions( me                  : mutable;
                          fboPtr              : PtrFrameBuffer from Graphic3d;
                          width, height       : out Integer from Standard;
                          widthMax, heightMax : out Integer from Standard )
        is static;
        ---Level: Public
        ---Purpose: Read offscreen FBO configuration.

        FBOChangeViewport( me                  : mutable;
                           fboPtr              : in out PtrFrameBuffer from Graphic3d;
                           width, height       : Integer from Standard )
        is static;
        ---Level: Public
        ---Purpose: Change offscreen FBO viewport.

        BufferDump( me            : mutable;
                    buffer        : in out CRawBufferData from Image )
                   returns Boolean from Standard
        is static;
        ---Level: Public
        ---Purpose: Dump active rendering buffer into specified memory buffer.

    	EnableGLLight( me; enable : Boolean from Standard )
    	is static;
	---Level: Public
	---Purpose: turns on/off opengl lighting, currently used in triedron displaying

    	IsGLLightEnabled( me ) returns Boolean from Standard
    	is static;
	---Level: Public
	---Purpose: returns the current state of the gl lighting
	--          currently used in triedron displaying

        Export( me;
                FileName         : CString from Standard;
                Format           : ExportFormat from Graphic3d;
                SortType         : SortType from Graphic3d = Graphic3d_ST_BSP_Tree;
                Precision        : Real from Standard = 0.005;
                ProgressBarFunc  : Address from Standard = NULL;
                ProgressObject   : Address from Standard = NULL );

fields

--
-- Classe	:	Visual3d_View
--
-- Purpose	:	Declaration of the variables specific to views.
--
-- Reminder	:	A view is defined by:
--			- a ViewManager
--			- a ContextView
--			- a ViewMapping
--			- a ViewOrientation
--

	-- the associated C structure
	MyCView			:	CView from Graphic3d;

	-- the context of the view : Aliasing, Depth-Cueing, Lights ...
	MyContext		:	ContextView from Visual3d;

	-- the current mapping of the view
	MyViewMapping		:	ViewMapping from Visual3d;

	-- the reset mapping of the view
	MyViewMappingReset	:	ViewMapping from Visual3d;

	-- the current orientation of the view
	MyViewOrientation	:	ViewOrientation from Visual3d;

	-- the reset orientation of the view
	MyViewOrientationReset	:	ViewOrientation from Visual3d;

	-- the associated window
	MyWindow		:	Window from Aspect;

	-- the transformation
	MyTransformation	:	Array2OfReal from TColStd;

	-- the matrix management
	MyMatrixOfMapping	:	Array2OfReal from TColStd;
	MyMatrixOfOrientation	:	Array2OfReal from TColStd;

	-- association Structure_COMPUTE and Structure_Computed
	MyTOCOMPUTESequence	:	SequenceOfStructure from Graphic3d;
	MyCOMPUTEDSequence	:	SequenceOfStructure from Graphic3d;

	-- the graphic driver used
	MyGraphicDriver		:	GraphicDriver from Graphic3d;

	-- the background of the associated window
	MyBackground		:	Background from Aspect;

	-- the gradient background of the associated window
	MyGradientBackground	:	GradientBackground from Aspect;

	-- the displayed structures in the view
	MyDisplayedStructure	:	MapOfStructure from Graphic3d;

	-- the ViewManager associated with the view
--	MyPtrViewManager	:	Address from Standard;
	MyPtrViewManager	:	ViewManagerPtr from Visual3d;

	-- Booleans
	MyCBitFields		:	CBitFields8 from Graphic3d;

	MyGTrihedron        :   CGraduatedTrihedron from Graphic3d;

friends

	class ViewManager from Visual3d

end View;