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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 SoEXTENDER SoAccumulatedElement
| class.
|
| Classes:
| SoAccumulatedElement
|
| Author(s) : Paul S. Strauss
|
______________ S I L I C O N G R A P H I C S I N C . ____________
_______________________________________________________________________
*/
#ifndef _SO_ACCUMULATED_ELEMENT
#define _SO_ACCUMULATED_ELEMENT
//////////////////////////////////////////////////////////////////////////////
//
// Class: SoAccumulatedElement
//
// This is the abstract base class for each state element whose value
// may be accumulated when it is set. (This is rare.) Examples are
// transformations and profiles.
//
// Subclasses may need to override the push() method to copy values
// from the next instance in the stack (using getNextInStack() ),
// if the new one has to accumulate values on top of the old ones.
//
// This class defines the matches() method to compare lists of
// node-id's. The node-id's represent the states of all nodes that
// changed the value of the element. SoAccumulatedElement provides
// methods that maintain lists of node-id's of all nodes that affect
// an instance. Subclasses must call these methods to make sure the
// id's are up to date, if they plan to use the standard matches()
// method. Otherwise, they can define matches() differently, if they
// wish.
//
//////////////////////////////////////////////////////////////////////////////
#include <Inventor/elements/SoSubElement.h>
SoEXTENDER class SoAccumulatedElement : public SoElement {
SO_ELEMENT_ABSTRACT_HEADER(SoAccumulatedElement);
public:
// Returns TRUE if the element matches another element, based on node-id's
virtual SbBool matches(const SoElement *elt) const;
// Prints element (for debugging)
virtual void print(FILE *fp) const;
SoINTERNAL public:
// Initializes the SoAccumulatedElement class
static void initClass();
protected:
// Clears out the list of node id's
void clearNodeIds();
// Adds the id of the given node to the current list
void addNodeId(const SoNode *node);
// Sets the node id list to JUST the id of the given node
void setNodeId(const SoNode *node);
// Create and return a copy of this element; this will copy the
// nodeId list properly.
virtual SoElement *copyMatchInfo() const;
// Override normal capture method to capture elements at other
// depths that we are accumulating with.
virtual void captureThis(SoState *state) const;
// Destructor
virtual ~SoAccumulatedElement();
// This stores the list of node id's as pointers, since they
// should be the same length as int32_ts. The id's are sorted by
// increasing value, to make comparisons easier.
SbPList nodeIds;
private:
SbBool accumulatesWithParentFlag;
};
#endif /* _SO_ACCUMULATED_ELEMENT */
|
