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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 SoShapeHintsElement 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_SHAPE_HINTS_ELEMENT
#define _SO_SHAPE_HINTS_ELEMENT
#include <Inventor/elements/SoReplacedElement.h>
//////////////////////////////////////////////////////////////////////////////
//
// Class: SoShapeHintsElement
//
// Element that stores current shape hints.
// All three hints must be set at the same time; to
// leave any hint as is, use the "AS_IS" enum value.
//
//////////////////////////////////////////////////////////////////////////////
SoEXTENDER class SoShapeHintsElement : public SoElement {
SO_ELEMENT_HEADER(SoShapeHintsElement);
public:
enum VertexOrdering { // Hints about ordering of face vertices:
UNKNOWN_ORDERING, // No ordering info is known
CLOCKWISE, // Vertices are ordered CW around faces
COUNTERCLOCKWISE, // Vertices are ordered CCW around faces
ORDERING_AS_IS // Indicates to set() to leave as is
};
enum ShapeType { // Hints about entire shape:
UNKNOWN_SHAPE_TYPE, // Nothing is known about shape
SOLID, // Shape is known to be solid
SHAPE_TYPE_AS_IS // Indicates to set() to leave as is
};
enum FaceType { // Hints about faces of shape:
UNKNOWN_FACE_TYPE, // Nothing is known about faces
CONVEX, // Faces are all convex
FACE_TYPE_AS_IS // Indicates to set() to leave as is
};
// Initializes element
virtual void init(SoState *state);
// Sets the current shape hints in the state. Calls virtual
// method that subclasses can override.
static void set(SoState *state, VertexOrdering vertexOrdering,
ShapeType shapeType, FaceType faceType);
#ifndef IV_STRICT
static void set(SoState *state, SoNode *,
VertexOrdering vertexOrdering,
ShapeType shapeType, FaceType faceType)
{ set(state, vertexOrdering, shapeType, faceType); }
#endif
// Returns current shape hints from the state
static void get(SoState *state,
VertexOrdering &vertexOrdering,
ShapeType &shapeType, FaceType &faceType);
// Returns each default hint
static VertexOrdering getDefaultVertexOrdering() {return UNKNOWN_ORDERING;}
static ShapeType getDefaultShapeType() { return UNKNOWN_SHAPE_TYPE; }
static FaceType getDefaultFaceType() { return CONVEX; }
// Push copies the values from the previous element, so set
// doesn't have to set them if they are set AS_IS.
virtual void push(SoState *state);
// Returns TRUE if the hints match in both elements
virtual SbBool matches(const SoElement *elt) const;
// Create and return a copy of this element
virtual SoElement *copyMatchInfo() const;
// Prints element (for debugging)
virtual void print(FILE *fp) const;
SoINTERNAL public:
// Initializes the SoShapeHintsElement class
static void initClass();
protected:
// Virtual set methods that subclasses can override.
virtual void setElt(VertexOrdering vertexOrdering,
ShapeType shapeType, FaceType faceType);
VertexOrdering vertexOrdering;
ShapeType shapeType;
FaceType faceType;
virtual ~SoShapeHintsElement();
};
#endif /* _SO_SHAPE_HINTS_ELEMENT */
|
