1 /**************************************************************************\
2 * Copyright (c) Kongsberg Oil & Gas Technologies AS
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met:
8 *
9 * Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
11 *
12 * Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * Neither the name of the copyright holder nor the names of its
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 \**************************************************************************/
32
33 /*!
34 \class SoLineWidthElement Inventor/elements/SoLineWidthElement.h
35 \brief The SoLineWidthElement class changes the linewidth setting of the render state.
36
37 \ingroup elements
38
39 Requests from the scenegraph to change the linewidth when rendering
40 line primitives will be made through this element, which forwards it
41 to the appropriate native call in the underlying rendering library.
42
43 Subsequent nodes rendering line primitives will use the width
44 setting (for instance SoLineSet nodes).
45 */
46
47 #include <Inventor/elements/SoLineWidthElement.h>
48
49
50 #include <cassert>
51
52 SO_ELEMENT_SOURCE(SoLineWidthElement);
53
54 // doc in super
55 void
initClass(void)56 SoLineWidthElement::initClass(void)
57 {
58 SO_ELEMENT_INIT_CLASS(SoLineWidthElement, inherited);
59 }
60
61 /*!
62 Destructor.
63 */
~SoLineWidthElement()64 SoLineWidthElement::~SoLineWidthElement()
65 {
66 }
67
68 // doc in super
69 void
init(SoState * state)70 SoLineWidthElement::init(SoState * state)
71 {
72 inherited::init(state);
73 this->data = SoLineWidthElement::getDefault();
74 }
75
76 /*!
77 Set up the current state's \a lineWidth value.
78 */
79 void
set(SoState * const state,SoNode * const node,const float lineWidth)80 SoLineWidthElement::set(SoState * const state, SoNode * const node,
81 const float lineWidth)
82 {
83 SoFloatElement::set(classStackIndex, state, node, lineWidth);
84 }
85
86 /*!
87 Set up the current state's \a lineWidth value.
88 */
89 void
set(SoState * const state,const float lineWidth)90 SoLineWidthElement::set(SoState * const state, const float lineWidth)
91 {
92 SoLineWidthElement::set(state, NULL, lineWidth);
93 }
94
95 /*!
96 Returns the current line width value.
97 */
98 float
get(SoState * const state)99 SoLineWidthElement::get(SoState * const state)
100 {
101 return SoFloatElement::get(classStackIndex, state);
102 }
103
104 /*!
105 Returns the default linewidth value if no value has been set
106 explicitly.
107 */
108 float
getDefault(void)109 SoLineWidthElement::getDefault(void)
110 {
111 // 0 is an indicator value which means "use the default value of the
112 // rendering-library specific So*LineWidth element".
113 return 0.0f;
114 }
115