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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) 1990,91,92 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 contains the declaration of the OneShot engine
|
| Classes:
| SoOneShot
|
| Author(s) : Ronen Barzel
|
______________ S I L I C O N G R A P H I C S I N C . ____________
_______________________________________________________________________
*/
#ifndef _SO_ONE_SHOT_
#define _SO_ONE_SHOT_
#include <Inventor/engines/SoSubEngine.h>
#include <Inventor/fields/SoSFBool.h>
#include <Inventor/fields/SoSFTrigger.h>
#include <Inventor/fields/SoSFTime.h>
#include <Inventor/fields/SoSFBitMask.h>
// C-api: public=duration,trigger,flags,disable,timeIn
// C-api: public=timeOut,isActive,ramp
class SoOneShot : public SoEngine {
SO_ENGINE_HEADER(SoOneShot);
public:
enum Flags {
RETRIGGERABLE = (1<<0), // can start over during cycle?
HOLD_FINAL = (1<<1) // ramp & timeOut stay high after cycle?
};
// Inputs
SoSFTime duration; // duration of active cycle
SoSFTrigger trigger; // start the cycle
SoSFBitMask flags;
SoSFBool disable; // if TRUE, timer is disabled, output=0
SoSFTime timeIn;
// Outputs
SoEngineOutput timeOut; // (SoSFTime) time counts from trigger
SoEngineOutput isActive; // (SoSFBool)
SoEngineOutput ramp; // (SoSFFloat) ramps linearly 0 to 1
// Constructor
SoOneShot();
SoINTERNAL public:
static void initClass();
protected:
virtual void inputChanged(SoField *whichInput);
// Writes instance to SoOutput. Takes care of not writing out
// connection to realTime that is created in constructor.
virtual void writeInstance(SoOutput *out);
// Reads stuff into instance. Works around a problem with old
// files that contain explicit references to the default
// connection to realTime.
virtual SbBool readInstance(SoInput *in, unsigned short flags);
private:
enum State {
DISABLED, // everything clamped at 0 (via disable input)
OFF, // normal idle state
TRIGGERED, // has been triggered, need to start running
ON, // running, watching the time
PEAKED // have reached the end, need to reset
} state;
SbTime baseTime; // Starting time for elapsed time
SbTime timeVal; // holds output time value
double rampVal; // holds ramp value
SbBool outputPending; // keeps outputs enabled until data is read
// Destructor
~SoOneShot();
// Evaluation method
virtual void evaluate();
};
#endif /* _SO_ONE_SHOT_ */
|
