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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: 1.2 $
|
| Description:
| This file defines the SoGate class.
|
| Author(s) : Ronen Barzel, Gavin Bell
|
______________ S I L I C O N G R A P H I C S I N C . ____________
_______________________________________________________________________
*/
#ifndef _SO_GATE_
#define _SO_GATE_
#include <Inventor/SoDB.h>
#include <Inventor/engines/SoSubEngine.h>
#include <Inventor/fields/SoSFBool.h>
#include <Inventor/fields/SoSFName.h>
#include <Inventor/fields/SoSFTrigger.h>
//////////////////////////////////////////////////////////////////////////////
//
// Class: SoGate
//
// Gate engine class. A gate engine copies its input to its output,
// when the "enable" field is true. It will also do a one-time copy
// when the trigger field is touched.
//
//////////////////////////////////////////////////////////////////////////////
// C-api: public=enable,trigger,input,output
class SoGate : public SoEngine {
SO_ENGINE_HEADER(SoGate);
public:
// Constructor takes a subclass of SoMField.
SoGate(SoType mfInputType);
SoSFBool enable; // enable continuous flow-through
SoSFTrigger trigger; // copy a single value
// Note that unlike most engines the input field is a pointer.
// The default value for this field is no values.
SoMField *input;
// Note that unlike most engines the output is a pointer. The
// type of the output is the same as the input.
SoEngineOutput *output;
SoINTERNAL public:
static void initClass();
protected:
virtual void inputChanged(SoField *whichInput);
virtual SoFieldContainer * copyThroughConnection() const;
private:
SoGate();
~SoGate();
// gate engines must write out their input type before writing
// their fields, so these are overridden:
virtual SbBool readInstance(SoInput *in, unsigned short flags);
virtual void writeInstance(SoOutput *out);
void setup(SoType);
virtual void evaluate();
int conversionCase;
SoFieldData *myInputData;
SoEngineOutputData *myOutputData;
SoSFName typeField; // Used when reading/writing
};
#endif /* _SO_GATE_ */
|
