SoModelMatrixElement.h

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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/
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 */
 
 
/*
 * 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 SoModelMatrixElement class.
 |
 |   Author(s)          : Paul S. Strauss, Gavin Bell
 |
 ______________  S I L I C O N   G R A P H I C S   I N C .  ____________
 _______________________________________________________________________
 */
 
#ifndef  _SO_MODEL_MATRIX_ELEMENT
#define  _SO_MODEL_MATRIX_ELEMENT
 
#include <Inventor/SbLinear.h>
#include <Inventor/elements/SoAccumulatedElement.h>

 
SoEXTENDER class INVENTOR_API SoModelMatrixElement : public SoAccumulatedElement {
 
    SO_ELEMENT_HEADER(SoModelMatrixElement);
 
  public:
    virtual void        init(SoState *state);
    
    virtual bool        matches(const SoElement *elt) const;
 

    virtual void        push(SoState *state);

    static void         makeIdentity(SoState *state, SoNode *node);

    static void         set(SoState *state, SoNode *node,
                            const SbMatrix &matrix);

    static void         mult(SoState *state, SoNode *node,
                             const SbMatrix &matrix);

    static void         translateBy(SoState *state, SoNode *node,
                                    const SbVec3f &translation);
    static void         rotateBy(SoState *state, SoNode *node,
                                 const SbRotation &rotation);
    static void         scaleBy(SoState *state, SoNode *node,
                                const SbVec3f &scaleFactor);

    static SbMatrix     pushMatrix(SoState *state);
    static void         popMatrix(SoState *state, const SbMatrix &m);

    static void         setCullMatrix(SoState *state, SoNode *node,
                                      const SbMatrix &matrix);

    static const SbMatrix &     getCombinedCullMatrix(SoState *state);

    static const SbMatrix &     get(SoState *state);

    static const SbMatrix &     get(SoState *state, bool &isIdent);

    virtual void        print(FILE *fp) const;
 
  SoINTERNAL public:
    static void         initClass();
 
  protected:
    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);

    virtual SbMatrix    pushMatrixElt();
    virtual void        popMatrixElt(const SbMatrix &m);
 
    virtual ~SoModelMatrixElement();
 
  private:
    SbMatrix            modelMatrix;
    SbMatrix            cullMatrix;
    SbMatrix            modelCullMatrix;
    struct {
        unsigned int    isModelIdentity : 1;
        unsigned int    haveCullMatrix  : 1; 
        unsigned int    haveModelCull   : 1; 
    } flags;
 
    friend class SoLocalBBoxMatrixElement;
};
 
#endif /* _SO_MODEL_MATRIX_ELEMENT */