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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 SoVertexShape node 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_VERTEX_SHAPE_
#define _SO_VERTEX_SHAPE_
#include <Inventor/nodes/SoShape.h>
#include <Inventor/nodes/SoVertexProperty.h>
#include <Inventor/fields/SoSFNode.h>
//////////////////////////////////////////////////////////////////////////////
//
// Class: SoVertexShape
//
// Abstract vertex-based shape node class. All nodes derived from
// this class are shapes that are constructed from vertices at some
// or all of the current coordinates. They all have vertexProperty nodes,
// and vpCaches.
//
//////////////////////////////////////////////////////////////////////////////
class SoNormalBundle;
class SoNormalCache;
class SoState;
// C-api: abstract
// C-api: prefix=SoVtx
class SoVertexShape : public SoShape {
SO_NODE_ABSTRACT_HEADER(SoVertexShape);
public:
SoSFNode vertexProperty;
SoEXTENDER public:
// Subclasses may define this method to generate normals to use
// when the normal binding is DEFAULT and there aren't enough
// normals in the state. This should use the given SoNormalBundle
// to generate the normals. Returns TRUE if normals were generated.
virtual SbBool generateDefaultNormals(SoState *state,
SoNormalBundle *nb);
SoINTERNAL public:
static void initClass();
// Redefines this to invalidate normal cache
virtual void notify(SoNotList *list);
protected:
// Constructor - makes this abstract
SoVertexShape();
virtual ~SoVertexShape();
// Returns TRUE if the shape should be rendered.
// Checks for transparency in vertexProperty node before invoking
// render action.
virtual SbBool shouldGLRender(SoGLRenderAction *action);
// vpCache stores information from one render to the next about
// what information needs to be grabbed from the state, etc.
SoVertexPropertyCache vpCache;
// Sets up a cache to hold normals. This assumes the cache depends
// on only the current coordinates, shape hints, and crease angle.
void setNormalCache(SoState *state,
int numNormals, const SbVec3f *normals);
// Returns the current normal cache, or NULL if there is none
SoNormalCache *getNormalCache() const { return normalCache; }
private:
// This allows instances to cache normals that have been generated
SoNormalCache *normalCache;
};
#endif /* _SO_VERTEX_SHAPE_ */
|
