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
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
|
/**************************************************************************\
*
* This file is part of the Coin 3D visualization library.
* Copyright (C) by Kongsberg Oil & Gas Technologies.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* ("GPL") version 2 as published by the Free Software Foundation.
* See the file LICENSE.GPL at the root directory of this source
* distribution for additional information about the GNU GPL.
*
* For using Coin with software that can not be combined with the GNU
* GPL, and for taking advantage of the additional benefits of our
* support services, please contact Kongsberg Oil & Gas Technologies
* about acquiring a Coin Professional Edition License.
*
* See http://www.coin3d.org/ for more information.
*
* Kongsberg Oil & Gas Technologies, Bygdoy Alle 5, 0257 Oslo, NORWAY.
* http://www.sim.no/ sales@sim.no coin-support@coin3d.org
*
\**************************************************************************/
/*!
\class SoUnits SoUnits.h Inventor/nodes/SoUnits.h
\brief The SoUnits class is a node for setting unit types.
\ingroup nodes
Even though Coin doesn't care what units you are using in your scene
graph \e per \e se, there's an advantage to using SoUnits nodes: you
have a way to split your scene graph into different "conceptual"
parts.
When encountering SoUnit nodes, the traversal actions methods makes
sure the following geometry is scaled accordingly.
<b>FILE FORMAT/DEFAULTS:</b>
\code
Units {
units METERS
}
\endcode
*/
// *************************************************************************
#include <Inventor/nodes/SoUnits.h>
#include <Inventor/actions/SoGetBoundingBoxAction.h>
#include <Inventor/actions/SoGLRenderAction.h>
#include <Inventor/actions/SoPickAction.h>
#include <Inventor/actions/SoCallbackAction.h>
#include <Inventor/actions/SoGetMatrixAction.h>
#include <Inventor/actions/SoGetPrimitiveCountAction.h>
#include <Inventor/elements/SoModelMatrixElement.h>
#include <Inventor/elements/SoUnitsElement.h>
#include "nodes/SoSubNodeP.h"
// *************************************************************************
/*!
\enum SoUnits::Units
Enumerates the available unit settings.
*/
/*!
\var SoSFEnum SoUnits::units
The units which will be used for nodes following this node in the
traversal (until the next SoUnit node, if any). Default value of the
field is SoUnits::METERS.
*/
// *************************************************************************
static const float factors[] = {
1.0f, // METERS
0.01f, // CENTIMETERS
0.001f, // MILLIMETERS
0.000001f, // MICROMETERS
0.000001f, // MICRONS
0.000000001f, // NANOMETERS
0.0000000001f, // ANGSTROMS
1000.0f, // KILOMETERS
0.3048f, // FEET
0.0254f, // INCHES
3.52777737e-4f, // POINTS
0.9144f, // YARDS
1609.3f, // MILES
1852.0f, // NAUTICAL
};
// *************************************************************************
SO_NODE_SOURCE(SoUnits);
/*!
Constructor.
*/
SoUnits::SoUnits(void)
{
SO_NODE_INTERNAL_CONSTRUCTOR(SoUnits);
SO_NODE_ADD_FIELD(units, (SoUnits::METERS));
SO_NODE_DEFINE_ENUM_VALUE(Units, METERS);
SO_NODE_DEFINE_ENUM_VALUE(Units, CENTIMETERS);
SO_NODE_DEFINE_ENUM_VALUE(Units, MILLIMETERS);
SO_NODE_DEFINE_ENUM_VALUE(Units, MICROMETERS);
SO_NODE_DEFINE_ENUM_VALUE(Units, MICRONS);
SO_NODE_DEFINE_ENUM_VALUE(Units, NANOMETERS);
SO_NODE_DEFINE_ENUM_VALUE(Units, ANGSTROMS);
SO_NODE_DEFINE_ENUM_VALUE(Units, KILOMETERS);
SO_NODE_DEFINE_ENUM_VALUE(Units, FEET);
SO_NODE_DEFINE_ENUM_VALUE(Units, INCHES);
SO_NODE_DEFINE_ENUM_VALUE(Units, POINTS);
SO_NODE_DEFINE_ENUM_VALUE(Units, YARDS);
SO_NODE_DEFINE_ENUM_VALUE(Units, MILES);
SO_NODE_DEFINE_ENUM_VALUE(Units, NAUTICAL_MILES);
SO_NODE_SET_SF_ENUM_TYPE(units, Units);
}
/*!
Destructor.
*/
SoUnits::~SoUnits()
{
}
// Doc from superclass.
void
SoUnits::initClass(void)
{
SO_NODE_INTERNAL_INIT_CLASS(SoUnits, SO_FROM_INVENTOR_1);
SO_ENABLE(SoGetBoundingBoxAction, SoUnitsElement);
SO_ENABLE(SoGetMatrixAction, SoUnitsElement);
SO_ENABLE(SoGLRenderAction, SoUnitsElement);
SO_ENABLE(SoPickAction, SoUnitsElement);
SO_ENABLE(SoCallbackAction, SoUnitsElement);
SO_ENABLE(SoGetPrimitiveCountAction, SoUnitsElement);
}
// Doc from superclass.
void
SoUnits::getBoundingBox(SoGetBoundingBoxAction * action)
{
SoUnits::doAction((SoAction*)action);
}
// Doc from superclass.
void
SoUnits::GLRender(SoGLRenderAction * action)
{
SoUnits::doAction((SoAction*)action);
}
// Doc from superclass.
void
SoUnits::doAction(SoAction * action)
{
if (this->units.isIgnored()) return;
SoState * state = action->getState();
SoUnitsElement::Units currentunit = SoUnitsElement::get(state);
if (currentunit != (SoUnitsElement::Units)units.getValue()) {
SoUnitsElement::set(state,
(SoUnitsElement::Units)units.getValue());
float scale = factors[units.getValue()] / factors[currentunit];
SoModelMatrixElement::scaleBy(state, this,
SbVec3f(scale, scale, scale));
}
}
// Doc from superclass.
void
SoUnits::callback(SoCallbackAction * action)
{
SoUnits::doAction((SoAction *)action);
}
// Doc from superclass.
void
SoUnits::getMatrix(SoGetMatrixAction * action)
{
if (this->units.isIgnored()) return;
SoState * state = action->getState();
SoUnitsElement::Units currentunit = SoUnitsElement::get(state);
if (currentunit != (SoUnitsElement::Units) this->units.getValue()) {
SoUnitsElement::set(state,
(SoUnitsElement::Units)units.getValue());
float scale = factors[(int)this->units.getValue()] / factors[(int) currentunit];
float inv = 1.0f / scale;
SbMatrix m;
m.setScale(SbVec3f(scale, scale, scale));
action->getMatrix().multLeft(m);
m.setScale(SbVec3f(inv, inv, inv));
action->getInverse().multRight(m);
}
}
// Doc from superclass.
void
SoUnits::pick(SoPickAction * action)
{
SoUnits::doAction((SoAction *)action);
}
// Doc from superclass.
void
SoUnits::getPrimitiveCount(SoGetPrimitiveCountAction * action)
{
SoUnits::doAction((SoAction *)action);
}
|