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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 SoBBoxModelMatrixElement class.
|
| 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_BBOX_MODEL_MATRIX_ELEMENT
#define _SO_BBOX_MODEL_MATRIX_ELEMENT
#include <Inventor/elements/SoModelMatrixElement.h>
//////////////////////////////////////////////////////////////////////////////
//
// Class: SoBBoxModelMatrixElement
//
// Element that stores the current model matrix for use with the
// SoGetBoundingBoxAction. Overrides the virtual methods on
// SoModelMatrixElement to also set the current
// SoLocalBBoxMatrixElement.
//
// This class relies on SoModelMatrixElement to store the matrix in
// the instance, and inherits most of its methods from it.
//
//////////////////////////////////////////////////////////////////////////////
SoEXTENDER class SoBBoxModelMatrixElement : public SoModelMatrixElement {
SO_ELEMENT_HEADER(SoBBoxModelMatrixElement);
public:
// Initializes element
virtual void init(SoState *state);
// Overrides push() method to copy values from next instance in the stack
virtual void push(SoState *state);
// Allows the SoGetBoundingBoxAction to reset the current model
// matrix to identity and all currently-open local matrices to
// identity
static void reset(SoState *state, SoNode *node);
// Because two model matrices are kept track of during the
// getBoundingBoxAction (the local model matrix, used by
// Separators to calculate their bbox caches, and the real model
// matrix), replacement routines for pushMatrix/popMatrix must be
// given; TransformSeparator::getBoundingBox uses these methods to
// correctly keep both matrices up-to-date.
static void pushMatrix(SoState *state,
SbMatrix &matrix,
SbMatrix &localmatrix);
static void popMatrix(SoState *state,
const SbMatrix &matrix,
const SbMatrix &localmatrix);
SoINTERNAL public:
// Initializes the SoBBoxModelMatrixElement class
static void initClass();
protected:
// These all override the methods on SoModelMatrixElement to also
// set the SoLocalBBoxMatrixElement
virtual void makeEltIdentity();
virtual void setElt(const SbMatrix &matrix);
virtual void multElt(const SbMatrix &matrix);
virtual void translateEltBy(const SbVec3f &translation);
virtual void rotateEltBy(const SbRotation &translation);
virtual void scaleEltBy(const SbVec3f &scaleFactor);
// These must never be called; they print debug errors if called:
virtual SbMatrix pushMatrixElt();
virtual void popMatrixElt(const SbMatrix &m);
virtual ~SoBBoxModelMatrixElement();
private:
// Stores pointer to state so we can access the SoLocalBBoxMatrixElement
SoState *state;
// This is used to make sure the pushMatrix/popMatrix methods are
// called correctly.
static SbBool pushPopCallOK;
};
#endif /* _SO_BBOX_MODEL_MATRIX_ELEMENT */
|
