1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
|
/*
*
* 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 SoShapeHints 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_SHAPE_HINTS_
#define _SO_SHAPE_HINTS_
#include <Inventor/elements/SoGLShapeHintsElement.h>
#include <Inventor/fields/SoSFEnum.h>
#include <Inventor/fields/SoSFFloat.h>
#include <Inventor/nodes/SoSubNode.h>
//////////////////////////////////////////////////////////////////////////////
//
// Class: SoShapeHints
//
// This node is used to give hints about subsequent shapes defined in
// a scene graph. It allows Inventor to provide or optimize certain
// features (such as back-face culling and two-sided lighting) based
// on information about shapes. The vertexOrdering, faceType, and
// shapeType fields hold this information. There is also a crease
// angle field, which is used when default normals are generated for
// a polyhedral shape. It defines the smallest edge angle that will
// be shaded as a crease (faceted), rather than as smooth.
//
//////////////////////////////////////////////////////////////////////////////
// C-api: public=vertexOrdering,shapeType,faceType, creaseAngle
class SoShapeHints : public SoNode {
SO_NODE_HEADER(SoShapeHints);
public:
// Hints about ordering of face vertices: if ordering of all
// vertices of all faces is known to be consistent when viewed
// from "outside" shape or not.
enum VertexOrdering {
UNKNOWN_ORDERING = SoShapeHintsElement::UNKNOWN_ORDERING,
CLOCKWISE = SoShapeHintsElement::CLOCKWISE,
COUNTERCLOCKWISE = SoShapeHintsElement::COUNTERCLOCKWISE
};
// Hints about entire shape: if shape is known to be a solid
// object, as opposed to a surface.
enum ShapeType {
UNKNOWN_SHAPE_TYPE = SoShapeHintsElement::UNKNOWN_SHAPE_TYPE,
SOLID = SoShapeHintsElement::SOLID
};
// Hints about faces of shape: if all faces are known to be convex
// or not.
enum FaceType {
UNKNOWN_FACE_TYPE = SoShapeHintsElement::UNKNOWN_FACE_TYPE,
CONVEX = SoShapeHintsElement::CONVEX
};
// Fields
SoSFEnum vertexOrdering; // Ordering of face vertices
SoSFEnum shapeType; // Info about shape geometry
SoSFEnum faceType; // Info about face geometry
SoSFFloat creaseAngle; // Smallest angle for sharp edge
// Constructor
SoShapeHints();
SoEXTENDER public:
virtual void doAction(SoAction *action);
virtual void GLRender(SoGLRenderAction *action);
virtual void callback(SoCallbackAction *action);
virtual void pick(SoPickAction *action);
virtual void getBoundingBox(SoGetBoundingBoxAction *action);
SoINTERNAL public:
static void initClass();
protected:
virtual ~SoShapeHints();
private:
// Does regular doAction stuff, also sets shapehints element
void doAction2(SoAction *action);
};
#endif /* _SO_SHAPE_HINTS_ */
|
