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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 SoTextureMatrixElement class.
|
| Author(s) : Gavin Bell
|
______________ S I L I C O N G R A P H I C S I N C . ____________
_______________________________________________________________________
*/
#ifndef _SO_TEXTURE_MATRIX_ELEMENT
#define _SO_TEXTURE_MATRIX_ELEMENT
#include <Inventor/SbLinear.h>
#include <Inventor/elements/SoAccumulatedElement.h>
//////////////////////////////////////////////////////////////////////////////
//
// Class: SoTextureMatrixElement
//
// Element that stores the current texture matrix - the cumulative
// transformation applied to subsequent shapes. Because the matrix is
// cumulative, this class is derived from SoAccumulatedElement. The
// set() method replaces the current matrix, while all the others
// (mult(), translateBy(), etc.) multiply into it. Node id's of the
// nodes that affect the element are accumulated properly.
//
//////////////////////////////////////////////////////////////////////////////
SoEXTENDER class SoTextureMatrixElement : public SoAccumulatedElement {
SO_ELEMENT_HEADER(SoTextureMatrixElement);
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);
// Sets the texture matrix to the identity matrix
static void makeIdentity(SoState *state, SoNode *node);
// Multiplies the given matrix into the texture matrix
static void mult(SoState *state, SoNode *node,
const SbMatrix &matrix);
// Each of these multiplies a matrix that performs the specified
// transformation into the texture 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);
// Returns current matrix from the state
static const SbMatrix & get(SoState *state);
// Prints element (for debugging)
virtual void print(FILE *fp) const;
SoINTERNAL public:
// Initializes the SoTextureMatrixElement class
static void initClass();
protected:
SbMatrix textureMatrix;
// Sets the matrix in an instance to identity
virtual void makeEltIdentity();
// Multiplies into the matrix in an instance
virtual void multElt(const SbMatrix &matrix);
// Each of these performs the appropriate operation on the matrix
// in an instance
virtual void translateEltBy(const SbVec3f &translation);
virtual void rotateEltBy(const SbRotation &translation);
virtual void scaleEltBy(const SbVec3f &scaleFactor);
// Gets the matrix from an instance
virtual const SbMatrix & getElt() const;
virtual ~SoTextureMatrixElement();
};
#endif /* _SO_TEXTURE_MATRIX_ELEMENT */
|
