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/*
*
* Copyright (C) 2000 Silicon Graphics, Inc. All Rights Reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* Further, this software is distributed without any warranty that it is
* free of the rightful claim of any third person regarding infringement
* or the like. Any license provided herein, whether implied or
* otherwise, applies only to this software file. Patent licenses, if
* any, provided herein do not apply to combinations of this program with
* other software, or any other product whatsoever.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
* Mountain View, CA 94043, or:
*
* http://www.sgi.com
*
* For further information regarding this notice, see:
*
* http://oss.sgi.com/projects/GenInfo/NoticeExplan/
*
*/
// -*- C++ -*-
/*
* Copyright (C) 1990,91 Silicon Graphics, Inc.
*
_______________________________________________________________________
______________ S I L I C O N G R A P H I C S I N C . ____________
|
| $Revision: 1.1.1.1 $
|
| Description:
| This file defines the abstract SoFieldConverter base class.
|
| Author(s) : Paul S. Strauss, Ronen Barzel
|
______________ S I L I C O N G R A P H I C S I N C . ____________
_______________________________________________________________________
*/
#ifndef _SO_FIELD_CONVERTER_
#define _SO_FIELD_CONVERTER_
#include <Inventor/SoDB.h>
#include <Inventor/engines/SoSubEngine.h>
//////////////////////////////////////////////////////////////////////////////
//
// Class: SoFieldConverter
//
// Abstract base class for all field converter engines. A field
// converter engine is used to convert the value of a field of one
// type to another. These engines are registered with the global
// database so connections between fields of different types can be
// made by automatically inserting a converter instance.
// A single class of converter engine may be registered for several
// different conversions.
// Field converters are never written to file
// (SoField::writeConnection takes care of that).
//
//////////////////////////////////////////////////////////////////////////////
// C-api: abstract
SoEXTENDER class SoFieldConverter : public SoEngine {
SO_ENGINE_ABSTRACT_HEADER(SoFieldConverter);
public:
// These must be defined in each subclass. They return the input
// and output connections of the given types.
virtual SoField * getInput(SoType type) = 0;
virtual SoEngineOutput * getOutput(SoType type) = 0;
// Returns the input that is connected. By default, this searches
// through the field data for the field that is connected;
// you can redefine to make more efficient.
virtual SoField * getConnectedInput();
SoINTERNAL public:
static void initClass();
static void initClasses(); // init all builtin converters
// Adds all fields connected from the output of the converter to
// the given list
int getForwardConnections(SoFieldList &list) const;
protected:
SoFieldConverter();
~SoFieldConverter();
};
#endif /* _SO_FIELD_CONVERTER_ */
|
