occt/src/STEPControl/STEPControl_ActorRead.cdl

-- Created on: 1994-12-21
-- Created by: Dieter THIEMANN
-- Copyright (c) 1994-1999 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 ActorRead from STEPControl
    inherits ActorOfTransientProcess from Transfer

    ---Purpose : This class performs the transfer of an Entity from
    --           AP214 and AP203, either Geometric or Topologic.
    --           
    --           I.E. for each type of Entity, it invokes the appropriate Tool
    --           then returns the Binder which contains the Result

uses 

    TransientProcess                    from Transfer, 
    Binder                              from Transfer, 
    Trsf                                from gp,
    Axis2Placement3d                    from StepGeom,
    Representation                      from StepRepr,
    RepresentationRelationship          from StepRepr,
    ProductDefinition                   from StepBasic,
    NextAssemblyUsageOccurrence         from StepRepr,
    ShapeRepresentation                 from StepShape,
    ContextDependentShapeRepresentation from StepShape,
    ShapeRepresentationRelationship     from StepRepr,
    GeometricRepresentationItem         from StepGeom,
    MappedItem                          from StepRepr,
    FaceSurface                         from StepShape,
    ShapeBinder                         from TransferBRep,
    NMTool                              from StepToTopoDS, -- To proceed with non-manifold cases (ssv; 13.11.2010)
    Shell                               from TopoDS,
    ListOfShape                         from TopTools,
    Compound                            from TopoDS,
    IndexedDataMapOfShapeListOfShape        from TopTools

is

    Create  returns mutable ActorRead from STEPControl;

    Recognize (me : mutable; start : Transient) returns Boolean is redefined;

    Transfer (me : mutable; start : Transient; 
                            TP : mutable TransientProcess from Transfer)
    	returns mutable Binder from Transfer is redefined;
    -- calls TransferShape

    TransferShape (me         : mutable; 
    	           start      : Transient; 
                   TP         : mutable TransientProcess from Transfer;
                   isManifold : Boolean = Standard_True)
    	returns mutable Binder from Transfer;

    ---Private: unit and uncertainty context management

    PrepareUnits (me : mutable; rep: Representation from StepRepr; 
    	    	    	    	TP: mutable TransientProcess from Transfer);
    	---Purpose: set units and tolerances context by given ShapeRepresentation
    
    ResetUnits (me: mutable);
    	---Purpose: reset units and tolerances context to default 
        ---         (mm, radians, read.precision.val, etc.)

    ComputeTransformation (me: mutable; Origin, Target: Axis2Placement3d from StepGeom;
    	    	    	    	    	OrigContext, TargContext: Representation from StepRepr;
    	    	    	    	    	TP: mutable TransientProcess from Transfer;
    	    	    	    	    	Trsf: out Trsf from gp)
    returns Boolean;
	---Purpose: Computes transformation defined by two axis placements (in MAPPED_ITEM
	--          or ITEM_DEFINED_TRANSFORMATION) taking into account their 
	--          representation contexts (i.e. units, which may be different)
	--          Returns True if transformation is computed and is not an identity.

    ComputeSRRWT (me: mutable; SRR: RepresentationRelationship from StepRepr;
    	    	    	       TP: mutable TransientProcess from Transfer;
    	    	    	       Trsf: out Trsf from gp)
    returns Boolean;
	---Purpose: Computes transformation defined by given
        --          REPRESENTATION_RELATIONSHIP_WITH_TRANSFORMATION
	
     TransferEntity(me: mutable; PD : ProductDefinition from StepBasic;
    	    	    TP :  mutable TransientProcess from Transfer) returns mutable ShapeBinder from TransferBRep is protected;
       ---Purpose:Transfers product definition entity
       
     
    TransferEntity(me: mutable; NAUO  : NextAssemblyUsageOccurrence from StepRepr;
    	  	    TP :  mutable TransientProcess from Transfer) returns mutable ShapeBinder from TransferBRep is protected;
       ---Purpose:Transfers next assembly usage occurence entity
       
    TransferEntity(me: mutable; sr  : ShapeRepresentation from StepShape;
    	  	    TP :  mutable TransientProcess from Transfer;
    	    	    isBound : out Boolean ) returns mutable ShapeBinder from TransferBRep is protected;
       ---Purpose:Transfers shape representation entity
       
       
    TransferEntity(me: mutable; CDSR  : ContextDependentShapeRepresentation from StepShape;
    	  	    TP :  mutable TransientProcess from Transfer) returns mutable ShapeBinder from TransferBRep is protected;
       ---Purpose:Transfers context dependent shape representation entity  
       
    TransferEntity(me: mutable; und  : ShapeRepresentationRelationship from StepRepr;
    	  	    TP :  mutable TransientProcess from Transfer;
    	    	    nbrep : Integer =0) returns mutable ShapeBinder from TransferBRep is protected;
       ---Purpose:Transfers  shape representation relationship entity    
       	
       
    TransferEntity(me         : mutable; 
                   git        : GeometricRepresentationItem from StepGeom;
                   TP         : mutable TransientProcess from Transfer;
                   isManifold : Boolean) returns mutable ShapeBinder from TransferBRep is protected;
       ---Purpose:Transfers  geometric representation item entity such as ManifoldSolidBRep ,...etc
       
    TransferEntity(me: mutable; mapit  : MappedItem from StepRepr;
    	  	    TP :  mutable TransientProcess from Transfer) returns mutable ShapeBinder from TransferBRep is protected;
       ---Purpose:Transfers  mapped item
       
     TransferEntity(me: mutable; fs  : FaceSurface from StepShape;
    	  	    TP :  mutable TransientProcess from Transfer) returns mutable ShapeBinder from TransferBRep is protected;
       ---Purpose:Transfers  FaceSurface entity  
              
    OldWay(me: mutable; start : Transient;
    	  	    TP :  mutable TransientProcess from Transfer) returns mutable ShapeBinder from TransferBRep is protected;
       ---Purpose:Tranlates file by old way when CDSR are roots . Acts only if "read.step.product_mode" is equal Off. 
    
    closeIDEASShell(me            : mutable;
                    shell         : in Shell from TopoDS;
                    closingShells : in ListOfShape from TopTools)
    returns Shell from TopoDS
    is private;

    computeIDEASClosings(me              : mutable;
                         comp            : in Compound from TopoDS;
                         shellClosingMap : in out IndexedDataMapOfShapeListOfShape from TopTools)
    is private;    
   
fields

--    theUnitFactor : Real;                   -- Conversion unit factor.
--    theVTol       : Real;                   -- Tolerance for Vertices
--    theETol       : Real;                   -- Tolerance for Edges
--    theFTol       : Real;                   -- Tolerance for Faces
    myNMTool : NMTool from StepToTopoDS; -- To proceed with non-manifold cases (ssv; 13.11.2010)
    myPrecision : Real;
    myMaxTol : Real;
    mySRContext: Representation from StepRepr; -- context for unuts

end ActorRead;