/usr/share/openscenegraph/examples/osganimationnode/osganimationnode.cpp is in openscenegraph-examples 3.2.0~rc1-4.
This file is owned by root:root, with mode 0o644.
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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 | /* -*-c++-*-
* Copyright (C) 2008 Cedric Pinson <mornifle@plopbyte.net>
*
* This library is open source and may be redistributed and/or modified under
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
* (at your option) any later version. The full license is in LICENSE file
* included with this distribution, and on the openscenegraph.org website.
*
* 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
* OpenSceneGraph Public License for more details.
*/
#include <iostream>
#include <osg/Geometry>
#include <osg/Shape>
#include <osg/ShapeDrawable>
#include <osgViewer/Viewer>
#include <osgGA/TrackballManipulator>
#include <osg/MatrixTransform>
#include <osg/Material>
#include <osgAnimation/Sampler>
class AnimtkUpdateCallback : public osg::NodeCallback
{
public:
META_Object(osgAnimation, AnimtkUpdateCallback);
AnimtkUpdateCallback()
{
_sampler = new osgAnimation::Vec3CubicBezierSampler;
_playing = false;
_lastUpdate = 0;
}
AnimtkUpdateCallback(const AnimtkUpdateCallback& val, const osg::CopyOp& copyop = osg::CopyOp::SHALLOW_COPY):
osg::Object(val, copyop),
osg::NodeCallback(val, copyop),
_sampler(val._sampler),
_startTime(val._startTime),
_currentTime(val._currentTime),
_playing(val._playing),
_lastUpdate(val._lastUpdate)
{
}
/** Callback method called by the NodeVisitor when visiting a node.*/
virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
{
if (nv->getVisitorType() == osg::NodeVisitor::UPDATE_VISITOR &&
nv->getFrameStamp() &&
nv->getFrameStamp()->getFrameNumber() != _lastUpdate) {
_lastUpdate = nv->getFrameStamp()->getFrameNumber();
_currentTime = osg::Timer::instance()->tick();
if (_playing && _sampler.get() && _sampler->getKeyframeContainer()) {
osg::MatrixTransform* transform = dynamic_cast<osg::MatrixTransform*>(node);
if (transform) {
osg::Vec3 result;
float t = osg::Timer::instance()->delta_s(_startTime, _currentTime);
float duration = _sampler->getEndTime() - _sampler->getStartTime();
t = fmod(t, duration);
t += _sampler->getStartTime();
_sampler->getValueAt(t, result);
transform->setMatrix(osg::Matrix::translate(result));
}
}
}
// note, callback is responsible for scenegraph traversal so
// they must call traverse(node,nv) to ensure that the
// scene graph subtree (and associated callbacks) are traversed.
traverse(node,nv);
}
void start() { _startTime = osg::Timer::instance()->tick(); _currentTime = _startTime; _playing = true;}
void stop() { _currentTime = _startTime; _playing = false;}
osg::ref_ptr<osgAnimation::Vec3CubicBezierSampler> _sampler;
osg::Timer_t _startTime;
osg::Timer_t _currentTime;
bool _playing;
unsigned int _lastUpdate;
};
class AnimtkStateSetUpdateCallback : public osg::StateSet::Callback
{
public:
META_Object(osgAnimation, AnimtkStateSetUpdateCallback);
AnimtkStateSetUpdateCallback()
{
_sampler = new osgAnimation::Vec4LinearSampler;
_playing = false;
_lastUpdate = 0;
}
AnimtkStateSetUpdateCallback(const AnimtkStateSetUpdateCallback& val, const osg::CopyOp& copyop = osg::CopyOp::SHALLOW_COPY):
osg::Object(val, copyop),
osg::StateSet::Callback(val, copyop),
_sampler(val._sampler),
_startTime(val._startTime),
_currentTime(val._currentTime),
_playing(val._playing),
_lastUpdate(val._lastUpdate)
{
}
/** Callback method called by the NodeVisitor when visiting a node.*/
virtual void operator()(osg::StateSet* state, osg::NodeVisitor* nv)
{
if (state &&
nv->getVisitorType() == osg::NodeVisitor::UPDATE_VISITOR &&
nv->getFrameStamp() &&
nv->getFrameStamp()->getFrameNumber() != _lastUpdate)
{
_lastUpdate = nv->getFrameStamp()->getFrameNumber();
_currentTime = osg::Timer::instance()->tick();
if (_playing && _sampler.get() && _sampler->getKeyframeContainer())
{
osg::Material* material = dynamic_cast<osg::Material*>(state->getAttribute(osg::StateAttribute::MATERIAL));
if (material)
{
osg::Vec4 result;
float t = osg::Timer::instance()->delta_s(_startTime, _currentTime);
float duration = _sampler->getEndTime() - _sampler->getStartTime();
t = fmod(t, duration);
t += _sampler->getStartTime();
_sampler->getValueAt(t, result);
material->setDiffuse(osg::Material::FRONT_AND_BACK, result);
}
}
}
}
void start() { _startTime = osg::Timer::instance()->tick(); _currentTime = _startTime; _playing = true;}
void stop() { _currentTime = _startTime; _playing = false;}
osg::ref_ptr<osgAnimation::Vec4LinearSampler> _sampler;
osg::Timer_t _startTime;
osg::Timer_t _currentTime;
bool _playing;
unsigned int _lastUpdate;
};
osg::Geode* createAxis()
{
osg::Geode* geode = new osg::Geode;
osg::ref_ptr<osg::Geometry> geometry (new osg::Geometry());
osg::ref_ptr<osg::Vec3Array> vertices (new osg::Vec3Array());
vertices->push_back (osg::Vec3 ( 0.0, 0.0, 0.0));
vertices->push_back (osg::Vec3 ( 10.0, 0.0, 0.0));
vertices->push_back (osg::Vec3 ( 0.0, 0.0, 0.0));
vertices->push_back (osg::Vec3 ( 0.0, 10.0, 0.0));
vertices->push_back (osg::Vec3 ( 0.0, 0.0, 0.0));
vertices->push_back (osg::Vec3 ( 0.0, 0.0, 10.0));
geometry->setVertexArray (vertices.get());
osg::ref_ptr<osg::Vec4Array> colors (new osg::Vec4Array());
colors->push_back (osg::Vec4 (1.0f, 0.0f, 0.0f, 1.0f));
colors->push_back (osg::Vec4 (1.0f, 0.0f, 0.0f, 1.0f));
colors->push_back (osg::Vec4 (0.0f, 1.0f, 0.0f, 1.0f));
colors->push_back (osg::Vec4 (0.0f, 1.0f, 0.0f, 1.0f));
colors->push_back (osg::Vec4 (0.0f, 0.0f, 1.0f, 1.0f));
colors->push_back (osg::Vec4 (0.0f, 0.0f, 1.0f, 1.0f));
geometry->setColorArray (colors.get(), osg::Array::BIND_PER_VERTEX);
geometry->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::LINES,0,6));
geode->addDrawable( geometry.get() );
geode->getOrCreateStateSet()->setMode(GL_LIGHTING, false);
return geode;
}
osg::StateSet* setupStateSet()
{
osg::StateSet* st = new osg::StateSet;
st->setAttributeAndModes(new osg::Material, true);
st->setMode(GL_BLEND, true);
AnimtkStateSetUpdateCallback* callback = new AnimtkStateSetUpdateCallback;
osgAnimation::Vec4KeyframeContainer* keys = callback->_sampler->getOrCreateKeyframeContainer();
keys->push_back(osgAnimation::Vec4Keyframe(0, osg::Vec4(0,0,0,0)));
keys->push_back(osgAnimation::Vec4Keyframe(2, osg::Vec4(0.5,0,0,0.5)));
keys->push_back(osgAnimation::Vec4Keyframe(4, osg::Vec4(0,0.5,0,1)));
keys->push_back(osgAnimation::Vec4Keyframe(6, osg::Vec4(0,0,0.5,1)));
keys->push_back(osgAnimation::Vec4Keyframe(8, osg::Vec4(1,1,1,0.5)));
keys->push_back(osgAnimation::Vec4Keyframe(10, osg::Vec4(0,0,0,0)));
callback->start();
st->setUpdateCallback(callback);
return st;
}
osg::Node* setupCube()
{
osg::Geode* geode = new osg::Geode;
geode->addDrawable(new osg::ShapeDrawable(new osg::Box(osg::Vec3(0.0f,0.0f,0.0f),2)));
geode->setStateSet(setupStateSet());
return geode;
}
osg::MatrixTransform* setupAnimtkNode()
{
osg::Vec3 v[5];
v[0] = osg::Vec3(0,0,0);
v[1] = osg::Vec3(10,-50,0);
v[2] = osg::Vec3(30,-10,20);
v[3] = osg::Vec3(-10,20,-20);
v[4] = osg::Vec3(0,0,0);
osg::MatrixTransform* node = new osg::MatrixTransform;
AnimtkUpdateCallback* callback = new AnimtkUpdateCallback;
osgAnimation::Vec3CubicBezierKeyframeContainer* keys = callback->_sampler->getOrCreateKeyframeContainer();
keys->push_back(osgAnimation::Vec3CubicBezierKeyframe(0, osgAnimation::Vec3CubicBezier(
v[0], // pos
v[0] + (v[0] - v[3]), // p1
v[1] - (v[1] - v[0]) // p2
)));
keys->push_back(osgAnimation::Vec3CubicBezierKeyframe(2, osgAnimation::Vec3CubicBezier(
v[1], // pos
v[1] + (v[1] - v[0]),
v[2] - (v[2] - v[1])
)));
keys->push_back(osgAnimation::Vec3CubicBezierKeyframe(4, osgAnimation::Vec3CubicBezier(
v[2], // pos
v[2] + (v[2] - v[1]),
v[3] - (v[3] - v[2])
)));
keys->push_back(osgAnimation::Vec3CubicBezierKeyframe(6, osgAnimation::Vec3CubicBezier(
v[3], // pos
v[3] + (v[3] - v[2]),
v[4] - (v[4] - v[3])
)));
keys->push_back(osgAnimation::Vec3CubicBezierKeyframe(8, osgAnimation::Vec3CubicBezier(
v[4], // pos
v[4] + (v[4] - v[3]),
v[0] - (v[0] - v[4])
)));
callback->start();
node->setUpdateCallback(callback);
node->addChild(setupCube());
return node;
}
int main (int argc, char* argv[])
{
osg::ArgumentParser arguments(&argc, argv);
osgViewer::Viewer viewer(arguments);
osgGA::TrackballManipulator* manipulator = new osgGA::TrackballManipulator();
viewer.setCameraManipulator(manipulator);
osg::Group* root = new osg::Group;
root->setInitialBound(osg::BoundingSphere(osg::Vec3(10,0,10), 30));
root->addChild(createAxis());
osg::MatrixTransform* node = setupAnimtkNode();
node->addChild(createAxis());
root->addChild(node);
viewer.setSceneData( root );
viewer.realize();
while (!viewer.done())
{
viewer.frame();
}
}
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