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32
33 /*!
34 \class SoResetTransform SoResetTransform.h Inventor/nodes/SoResetTransform.h
35 \brief The SoResetTransform class is a node type which makes it possible to "nullify" state during traversal.
36
37 \ingroup nodes
38
39 SoResetTransform is useful for setting up geometry in the scene
40 graph which will not be influenced by the transformation nodes
41 before it during traversal.
42
43 <b>FILE FORMAT/DEFAULTS:</b>
44 \code
45 ResetTransform {
46 whatToReset TRANSFORM
47 }
48 \endcode
49 */
50
51 // *************************************************************************
52
53 #include <Inventor/nodes/SoResetTransform.h>
54
55 #include <Inventor/actions/SoGLRenderAction.h>
56 #include <Inventor/actions/SoGetBoundingBoxAction.h>
57 #include <Inventor/actions/SoGetMatrixAction.h>
58 #include <Inventor/elements/SoGLModelMatrixElement.h>
59 #include <Inventor/elements/SoGLCacheContextElement.h>
60 #include <Inventor/elements/SoCacheElement.h>
61
62 #include "nodes/SoSubNodeP.h"
63
64 // *************************************************************************
65
66 /*!
67 \enum SoResetTransform::ResetType
68
69 The different options for what to reset.
70 */
71 /*!
72 \var SoResetTransform::ResetType SoResetTransform::TRANSFORM
73
74 Reset current model transformation.
75 */
76 /*!
77 \var SoResetTransform::ResetType SoResetTransform::BBOX
78
79 Reset current bounding box settings.
80 */
81
82
83 /*!
84 \var SoSFBitMask SoResetTransform::whatToReset
85
86 What this node instance should reset in the state when met during
87 traversal. Default value is SoResetTransform::TRANSFORM.
88 */
89
90
91 // *************************************************************************
92
93 SO_NODE_SOURCE(SoResetTransform);
94
95 /*!
96 Constructor.
97 */
SoResetTransform(void)98 SoResetTransform::SoResetTransform(void)
99 {
100 SO_NODE_INTERNAL_CONSTRUCTOR(SoResetTransform);
101
102 SO_NODE_ADD_FIELD(whatToReset, (SoResetTransform::TRANSFORM));
103
104 SO_NODE_DEFINE_ENUM_VALUE(ResetType, TRANSFORM);
105 SO_NODE_DEFINE_ENUM_VALUE(ResetType, BBOX);
106 SO_NODE_SET_SF_ENUM_TYPE(whatToReset, ResetType);
107 }
108
109 /*!
110 Destructor.
111 */
~SoResetTransform()112 SoResetTransform::~SoResetTransform()
113 {
114 }
115
116 // Doc from superclass.
117 void
initClass(void)118 SoResetTransform::initClass(void)
119 {
120 SO_NODE_INTERNAL_INIT_CLASS(SoResetTransform, SO_FROM_INVENTOR_1);
121 }
122
123 // Doc from superclass.
124 void
GLRender(SoGLRenderAction * action)125 SoResetTransform::GLRender(SoGLRenderAction * action)
126 {
127 if (!this->whatToReset.isIgnored() &&
128 (this->whatToReset.getValue() & SoResetTransform::TRANSFORM)) {
129 SoState * state = action->getState();
130 SoGLModelMatrixElement::makeIdentity(state, this);
131 }
132 }
133
134 // Doc from superclass.
135 void
getBoundingBox(SoGetBoundingBoxAction * action)136 SoResetTransform::getBoundingBox(SoGetBoundingBoxAction * action)
137 {
138 if (!this->whatToReset.isIgnored() &&
139 (this->whatToReset.getValue() & SoResetTransform::TRANSFORM)) {
140 SoState * state = action->getState();
141 // do this instead of calling SoResetTransform::doAction(action), so
142 // that SoLocalBBoxMatrixElement and SoBBoxModelMatrixElement can do
143 // the right thing.
144 SoModelMatrixElement::mult(state,
145 this,
146 SoModelMatrixElement::get(state).inverse());
147 }
148 if (!this->whatToReset.isIgnored() &&
149 (this->whatToReset.getValue() & SoResetTransform::BBOX)) {
150 action->getXfBoundingBox().makeEmpty();
151 action->resetCenter();
152 }
153 }
154
155 // Doc from superclass.
156 void
doAction(SoAction * action)157 SoResetTransform::doAction(SoAction *action)
158 {
159 if (!this->whatToReset.isIgnored() &&
160 (this->whatToReset.getValue() & SoResetTransform::TRANSFORM)) {
161 SoModelMatrixElement::makeIdentity(action->getState(), this);
162 }
163 }
164
165 // Doc from superclass.
166 void
callback(SoCallbackAction * action)167 SoResetTransform::callback(SoCallbackAction *action)
168 {
169 SoResetTransform::doAction((SoAction*)action);
170 }
171
172 // Doc from superclass.
173 void
getMatrix(SoGetMatrixAction * action)174 SoResetTransform::getMatrix(SoGetMatrixAction *action)
175 {
176 if (!this->whatToReset.isIgnored() &&
177 (this->whatToReset.getValue() & SoResetTransform::TRANSFORM)) {
178 action->getMatrix().makeIdentity();
179 action->getInverse().makeIdentity();
180 }
181 }
182
183 // Doc from superclass.
184 void
pick(SoPickAction * action)185 SoResetTransform::pick(SoPickAction *action)
186 {
187 SoResetTransform::doAction((SoAction*)action);
188 }
189
190 // Doc from superclass. Overrides the traversal method in this class for
191 // the SoGetPrimitiveCountAction because the number of primitives can
192 // be different depending on scene location (and thereby distance to
193 // camera) if there are e.g. SoLOD nodes in the scene.
194 void
getPrimitiveCount(SoGetPrimitiveCountAction * action)195 SoResetTransform::getPrimitiveCount(SoGetPrimitiveCountAction *action)
196 {
197 SoResetTransform::doAction((SoAction*)action);
198 }
199