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
|
/*
*
* 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 SoGLLineWidthElement 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_GL_LINE_WIDTH_ELEMENT
#define _SO_GL_LINE_WIDTH_ELEMENT
#include <Inventor/elements/SoLineWidthElement.h>
//////////////////////////////////////////////////////////////////////////////
//
// Class: SoGLLineWidthElement
//
// Element that stores the current line width in GL. Overrides the
// virtual methods on SoLineWidthElement to send the line width to GL
// when necessary.
//
// Note that this class relies on SoLineWidthElement to store the
// width in the instance.
//
//////////////////////////////////////////////////////////////////////////////
SoEXTENDER class SoGLLineWidthElement : public SoLineWidthElement {
SO_ELEMENT_HEADER(SoGLLineWidthElement);
public:
// Initializes element
virtual void init(SoState *state);
// Override push() method to copy state pointer and value of
// previous element, to avoid sending GL commands if the elements
// are the same.
virtual void push(SoState *state);
// Override pop() method so side effects can occur in GL
virtual void pop(SoState *state, const SoElement *prevTopElement);
SoINTERNAL public:
// Initializes the SoGLLineWidthElement class
static void initClass();
protected:
// Sets the line width in an instance. Has GL side effects.
virtual void setElt(float width);
virtual ~SoGLLineWidthElement();
private:
// This variable is TRUE if the value in this element was copied
// from our parent. If set is called with the same value, no GL
// commands have to be done-- it is as if this element doesn't
// exist, and the parent's value is used. Of course, a cache
// dependency will have to be added in this case (if the parent
// changes, the cache is not valid). Set sets this flag to false.
SbBool copiedFromParent;
// We need to store the state so we can get the viewport region element
SoState *state;
// Sends line width in element to GL
void send();
};
#endif /* _SO_GL_LINE_WIDTH_ELEMENT */
|
