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From Cedric Pinson, Pulled in osgAnimation from OpenSceneGraph-osgWidget-dev into svn/trunk.

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This commit is contained in:
Robert Osfield
2008-11-22 12:14:19 +00:00
parent fdaa75400b
commit 56a2cc65d0
55 changed files with 6623 additions and 3 deletions
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272
examples/osganimationnode/osganimationnode.cpp Normal file
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/* -*-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;
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;
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());
geometry->setColorBinding (osg::Geometry::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[4];
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[])
{
osgViewer::Viewer viewer;
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();
}
}