275 lines
11 KiB
C++
275 lines
11 KiB
C++
/* -*-c++-*-
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* Copyright (C) 2008 Cedric Pinson <mornifle@plopbyte.net>
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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#include <iostream>
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#include <osg/Geometry>
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#include <osg/Shape>
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#include <osg/ShapeDrawable>
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#include <osgViewer/Viewer>
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#include <osgGA/TrackballManipulator>
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#include <osg/MatrixTransform>
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#include <osg/Material>
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#include <osgAnimation/Sampler>
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class AnimtkUpdateCallback : public osg::NodeCallback
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{
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public:
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META_Object(osgAnimation, AnimtkUpdateCallback);
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AnimtkUpdateCallback()
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{
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_sampler = new osgAnimation::Vec3CubicBezierSampler;
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_playing = false;
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_lastUpdate = 0;
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}
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AnimtkUpdateCallback(const AnimtkUpdateCallback& val, const osg::CopyOp& copyop = osg::CopyOp::SHALLOW_COPY):
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osg::Object(val, copyop),
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osg::Callback(val, copyop),
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osg::NodeCallback(val, copyop),
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_sampler(val._sampler),
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_startTime(val._startTime),
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_currentTime(val._currentTime),
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_playing(val._playing),
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_lastUpdate(val._lastUpdate)
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{
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}
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/** Callback method called by the NodeVisitor when visiting a node.*/
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virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
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{
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if (nv->getVisitorType() == osg::NodeVisitor::UPDATE_VISITOR &&
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nv->getFrameStamp() &&
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nv->getFrameStamp()->getFrameNumber() != _lastUpdate) {
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_lastUpdate = nv->getFrameStamp()->getFrameNumber();
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_currentTime = osg::Timer::instance()->tick();
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if (_playing && _sampler.get() && _sampler->getKeyframeContainer()) {
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osg::MatrixTransform* transform = dynamic_cast<osg::MatrixTransform*>(node);
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if (transform) {
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osg::Vec3 result;
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float t = osg::Timer::instance()->delta_s(_startTime, _currentTime);
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float duration = _sampler->getEndTime() - _sampler->getStartTime();
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t = fmod(t, duration);
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t += _sampler->getStartTime();
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_sampler->getValueAt(t, result);
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transform->setMatrix(osg::Matrix::translate(result));
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}
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}
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}
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// note, callback is responsible for scenegraph traversal so
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// they must call traverse(node,nv) to ensure that the
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// scene graph subtree (and associated callbacks) are traversed.
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traverse(node,nv);
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}
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void start() { _startTime = osg::Timer::instance()->tick(); _currentTime = _startTime; _playing = true;}
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void stop() { _currentTime = _startTime; _playing = false;}
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osg::ref_ptr<osgAnimation::Vec3CubicBezierSampler> _sampler;
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osg::Timer_t _startTime;
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osg::Timer_t _currentTime;
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bool _playing;
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unsigned int _lastUpdate;
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};
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class AnimtkStateSetUpdateCallback : public osg::StateSet::Callback
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{
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public:
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META_Object(osgAnimation, AnimtkStateSetUpdateCallback);
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AnimtkStateSetUpdateCallback()
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{
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_sampler = new osgAnimation::Vec4LinearSampler;
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_playing = false;
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_lastUpdate = 0;
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}
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AnimtkStateSetUpdateCallback(const AnimtkStateSetUpdateCallback& val, const osg::CopyOp& copyop = osg::CopyOp::SHALLOW_COPY):
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osg::Object(val, copyop),
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osg::Callback(val, copyop),
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osg::StateSet::Callback(val, copyop),
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_sampler(val._sampler),
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_startTime(val._startTime),
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_currentTime(val._currentTime),
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_playing(val._playing),
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_lastUpdate(val._lastUpdate)
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{
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}
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/** Callback method called by the NodeVisitor when visiting a node.*/
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virtual void operator()(osg::StateSet* state, osg::NodeVisitor* nv)
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{
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if (state &&
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nv->getVisitorType() == osg::NodeVisitor::UPDATE_VISITOR &&
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nv->getFrameStamp() &&
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nv->getFrameStamp()->getFrameNumber() != _lastUpdate)
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{
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_lastUpdate = nv->getFrameStamp()->getFrameNumber();
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_currentTime = osg::Timer::instance()->tick();
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if (_playing && _sampler.get() && _sampler->getKeyframeContainer())
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{
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osg::Material* material = dynamic_cast<osg::Material*>(state->getAttribute(osg::StateAttribute::MATERIAL));
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if (material)
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{
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osg::Vec4 result;
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float t = osg::Timer::instance()->delta_s(_startTime, _currentTime);
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float duration = _sampler->getEndTime() - _sampler->getStartTime();
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t = fmod(t, duration);
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t += _sampler->getStartTime();
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_sampler->getValueAt(t, result);
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material->setDiffuse(osg::Material::FRONT_AND_BACK, result);
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}
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}
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}
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}
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void start() { _startTime = osg::Timer::instance()->tick(); _currentTime = _startTime; _playing = true;}
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void stop() { _currentTime = _startTime; _playing = false;}
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osg::ref_ptr<osgAnimation::Vec4LinearSampler> _sampler;
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osg::Timer_t _startTime;
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osg::Timer_t _currentTime;
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bool _playing;
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unsigned int _lastUpdate;
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};
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osg::Geode* createAxis()
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{
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osg::Geode* geode = new osg::Geode;
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osg::ref_ptr<osg::Geometry> geometry (new osg::Geometry());
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osg::ref_ptr<osg::Vec3Array> vertices (new osg::Vec3Array());
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vertices->push_back (osg::Vec3 ( 0.0, 0.0, 0.0));
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vertices->push_back (osg::Vec3 ( 10.0, 0.0, 0.0));
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vertices->push_back (osg::Vec3 ( 0.0, 0.0, 0.0));
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vertices->push_back (osg::Vec3 ( 0.0, 10.0, 0.0));
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vertices->push_back (osg::Vec3 ( 0.0, 0.0, 0.0));
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vertices->push_back (osg::Vec3 ( 0.0, 0.0, 10.0));
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geometry->setVertexArray (vertices.get());
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osg::ref_ptr<osg::Vec4Array> colors (new osg::Vec4Array());
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colors->push_back (osg::Vec4 (1.0f, 0.0f, 0.0f, 1.0f));
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colors->push_back (osg::Vec4 (1.0f, 0.0f, 0.0f, 1.0f));
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colors->push_back (osg::Vec4 (0.0f, 1.0f, 0.0f, 1.0f));
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colors->push_back (osg::Vec4 (0.0f, 1.0f, 0.0f, 1.0f));
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colors->push_back (osg::Vec4 (0.0f, 0.0f, 1.0f, 1.0f));
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colors->push_back (osg::Vec4 (0.0f, 0.0f, 1.0f, 1.0f));
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geometry->setColorArray (colors.get(), osg::Array::BIND_PER_VERTEX);
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geometry->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::LINES,0,6));
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geode->addDrawable( geometry.get() );
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geode->getOrCreateStateSet()->setMode(GL_LIGHTING, false);
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return geode;
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}
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osg::StateSet* setupStateSet()
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{
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osg::StateSet* st = new osg::StateSet;
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st->setAttributeAndModes(new osg::Material, true);
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st->setMode(GL_BLEND, true);
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AnimtkStateSetUpdateCallback* callback = new AnimtkStateSetUpdateCallback;
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osgAnimation::Vec4KeyframeContainer* keys = callback->_sampler->getOrCreateKeyframeContainer();
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keys->push_back(osgAnimation::Vec4Keyframe(0, osg::Vec4(0,0,0,0)));
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keys->push_back(osgAnimation::Vec4Keyframe(2, osg::Vec4(0.5,0,0,0.5)));
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keys->push_back(osgAnimation::Vec4Keyframe(4, osg::Vec4(0,0.5,0,1)));
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keys->push_back(osgAnimation::Vec4Keyframe(6, osg::Vec4(0,0,0.5,1)));
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keys->push_back(osgAnimation::Vec4Keyframe(8, osg::Vec4(1,1,1,0.5)));
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keys->push_back(osgAnimation::Vec4Keyframe(10, osg::Vec4(0,0,0,0)));
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callback->start();
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st->setUpdateCallback(callback);
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return st;
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}
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osg::Node* setupCube()
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{
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osg::Geode* geode = new osg::Geode;
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geode->addDrawable(new osg::ShapeDrawable(new osg::Box(osg::Vec3(0.0f,0.0f,0.0f),2)));
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geode->setStateSet(setupStateSet());
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return geode;
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}
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osg::MatrixTransform* setupAnimtkNode()
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{
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osg::Vec3 v[5];
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v[0] = osg::Vec3(0,0,0);
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v[1] = osg::Vec3(10,-50,0);
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v[2] = osg::Vec3(30,-10,20);
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v[3] = osg::Vec3(-10,20,-20);
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v[4] = osg::Vec3(0,0,0);
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osg::MatrixTransform* node = new osg::MatrixTransform;
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AnimtkUpdateCallback* callback = new AnimtkUpdateCallback;
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osgAnimation::Vec3CubicBezierKeyframeContainer* keys = callback->_sampler->getOrCreateKeyframeContainer();
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keys->push_back(osgAnimation::Vec3CubicBezierKeyframe(0, osgAnimation::Vec3CubicBezier(
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v[0], // pos
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v[0] + (v[0] - v[3]), // p1
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v[1] - (v[1] - v[0]) // p2
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)));
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keys->push_back(osgAnimation::Vec3CubicBezierKeyframe(2, osgAnimation::Vec3CubicBezier(
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v[1], // pos
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v[1] + (v[1] - v[0]),
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v[2] - (v[2] - v[1])
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)));
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keys->push_back(osgAnimation::Vec3CubicBezierKeyframe(4, osgAnimation::Vec3CubicBezier(
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v[2], // pos
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v[2] + (v[2] - v[1]),
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v[3] - (v[3] - v[2])
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)));
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keys->push_back(osgAnimation::Vec3CubicBezierKeyframe(6, osgAnimation::Vec3CubicBezier(
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v[3], // pos
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v[3] + (v[3] - v[2]),
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v[4] - (v[4] - v[3])
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)));
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keys->push_back(osgAnimation::Vec3CubicBezierKeyframe(8, osgAnimation::Vec3CubicBezier(
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v[4], // pos
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v[4] + (v[4] - v[3]),
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v[0] - (v[0] - v[4])
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)));
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callback->start();
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node->setUpdateCallback(callback);
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node->addChild(setupCube());
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return node;
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}
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int main (int argc, char* argv[])
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{
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osg::ArgumentParser arguments(&argc, argv);
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osgViewer::Viewer viewer(arguments);
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osgGA::TrackballManipulator* manipulator = new osgGA::TrackballManipulator();
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viewer.setCameraManipulator(manipulator);
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osg::Group* root = new osg::Group;
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root->setInitialBound(osg::BoundingSphere(osg::Vec3(10,0,10), 30));
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root->addChild(createAxis());
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osg::MatrixTransform* node = setupAnimtkNode();
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node->addChild(createAxis());
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root->addChild(node);
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viewer.setSceneData( root );
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viewer.realize();
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while (!viewer.done())
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{
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viewer.frame();
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}
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}
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