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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 SoClipPlaneElement 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_CLIP_PLANE_ELEMENT
#define _SO_CLIP_PLANE_ELEMENT
#include <Inventor/SbLinear.h>
#include <Inventor/elements/SoAccumulatedElement.h>
//////////////////////////////////////////////////////////////////////////////
//
// Class: SoClipPlaneElement
//
// Element that stores the current set of clipping planes, specified
// as SbPlanes.
//
// When a plane is added, this element gets the current model matrix
// from the state and stores it in the instance. This allows the
// get() method to return the clip plane in object space (the plane
// as originally defined) or world space (after being transformed by
// the model matrix).
//
//////////////////////////////////////////////////////////////////////////////
SoEXTENDER class SoClipPlaneElement : public SoAccumulatedElement {
SO_ELEMENT_HEADER(SoClipPlaneElement);
public:
// Initializes element
virtual void init(SoState *state);
// Adds a clip plane to the current set in the state
static void add(SoState *state, SoNode *node,
const SbPlane &plane);
// Overrides push() method to copy values from next instance in the stack
virtual void push(SoState *state);
// Overrides pop() method to free up planes that were added
virtual void pop(SoState *state, const SoElement *prevTopElement);
// Returns the top (current) instance of the element in the state
static const SoClipPlaneElement * getInstance(SoState *state);
// Returns the number of planes in an instance
int getNum() const;
// Returns the indexed plane an element as an SbPlane. The plane
// can be returned in object or world space.
const SbPlane & get(int index, SbBool inWorldSpace = TRUE) const;
// Prints element (for debugging)
virtual void print(FILE *fp) const;
SoINTERNAL public:
// Initializes the SoClipPlaneElement class
static void initClass();
protected:
SbPList planes; // List of plane structures
int startIndex; // Index of 1st plane created
// in this instance
// Adds the clipping plane to an instance. Takes the new plane and
// the current model matrix
virtual void addToElt(const SbPlane &plane,
const SbMatrix &modelMatrix);
virtual ~SoClipPlaneElement();
};
#endif /* _SO_CLIP_PLANE_ELEMENT */
|
