dd996a3289
forcing users to use osgDB::readRef*File() methods. The later is preferable as it closes a potential threading bug when using paging databases in conjunction
with the osgDB::Registry Object Cache. This threading bug occurs when one thread gets an object from the Cache via an osgDB::read*File() call where only
a pointer to the object is passed back, so taking a reference to the object is delayed till it gets reassigned to a ref_ptr<>, but at the same time another
thread calls a flush of the Object Cache deleting this object as it's referenceCount is now zero. Using osgDB::readREf*File() makes sure the a ref_ptr<> is
passed back and the referenceCount never goes to zero.
To ensure the OSG builds when OSG_PROVIDE_READFILE is to OFF the many cases of osgDB::read*File() usage had to be replaced with a ref_ptr<> osgDB::readRef*File()
usage. The avoid this change causing lots of other client code to be rewritten to handle the use of ref_ptr<> in place of C pointer I introduced a serious of
templte methods in various class to adapt ref_ptr<> to the underly C pointer to be passed to old OSG API's, example of this is found in include/osg/Group:
bool addChild(Node* child); // old method which can only be used with a Node*
tempalte<class T> bool addChild(const osg::ref_ptr<T>& child) { return addChild(child.get()); } // adapter template method
These changes together cover 149 modified files, so it's a large submission. This extent of changes are warrent to make use of the Object Cache
and multi-threaded loaded more robust.
git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk@15164 16af8721-9629-0410-8352-f15c8da7e697
461 lines
17 KiB
C++
461 lines
17 KiB
C++
/* OpenSceneGraph example, osgparticleeffects.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
|
|
|
|
#include <osgViewer/Viewer>
|
|
|
|
#include <osg/Group>
|
|
#include <osg/Geode>
|
|
#include <osg/ShapeDrawable>
|
|
#include <osg/Texture2D>
|
|
#include <osg/PositionAttitudeTransform>
|
|
#include <osg/MatrixTransform>
|
|
#include <osg/io_utils>
|
|
|
|
#include <osgUtil/Optimizer>
|
|
|
|
#include <osgDB/ReadFile>
|
|
|
|
#include <osgText/Text>
|
|
|
|
#include <osgParticle/ExplosionEffect>
|
|
#include <osgParticle/ExplosionDebrisEffect>
|
|
#include <osgParticle/SmokeEffect>
|
|
#include <osgParticle/SmokeTrailEffect>
|
|
#include <osgParticle/FireEffect>
|
|
|
|
// for the grid data..
|
|
#include "../osghangglide/terrain_coords.h"
|
|
|
|
osg::Vec3 wind(1.0f,0.0f,0.0f);
|
|
|
|
osg::AnimationPath* createAnimationPath(const osg::Vec3& center,float radius,double looptime)
|
|
{
|
|
// set up the animation path
|
|
osg::AnimationPath* animationPath = new osg::AnimationPath;
|
|
animationPath->setLoopMode(osg::AnimationPath::LOOP);
|
|
|
|
int numSamples = 40;
|
|
float yaw = 0.0f;
|
|
float yaw_delta = 2.0f*osg::PI/((float)numSamples-1.0f);
|
|
float roll = osg::inDegrees(30.0f);
|
|
|
|
double time=0.0f;
|
|
double time_delta = looptime/(double)numSamples;
|
|
for(int i=0;i<numSamples;++i)
|
|
{
|
|
osg::Vec3 position(center+osg::Vec3(sinf(yaw)*radius,cosf(yaw)*radius,0.0f));
|
|
osg::Quat rotation(osg::Quat(roll,osg::Vec3(0.0,1.0,0.0))*osg::Quat(-(yaw+osg::inDegrees(90.0f)),osg::Vec3(0.0,0.0,1.0)));
|
|
|
|
animationPath->insert(time,osg::AnimationPath::ControlPoint(position,rotation));
|
|
|
|
yaw += yaw_delta;
|
|
time += time_delta;
|
|
|
|
}
|
|
return animationPath;
|
|
}
|
|
|
|
osg::Node* createMovingModel(const osg::Vec3& center, float radius)
|
|
{
|
|
float animationLength = 10.0f;
|
|
|
|
osg::AnimationPath* animationPath = createAnimationPath(center,radius,animationLength);
|
|
|
|
osg::ref_ptr<osg::Group> model = new osg::Group;
|
|
|
|
osg::ref_ptr<osg::Node> glider = osgDB::readRefNodeFile("glider.osgt");
|
|
if (glider)
|
|
{
|
|
const osg::BoundingSphere& bs = glider->getBound();
|
|
float size = radius/bs.radius()*0.15f;
|
|
|
|
osg::MatrixTransform* positioned = new osg::MatrixTransform;
|
|
positioned->setDataVariance(osg::Object::STATIC);
|
|
positioned->setMatrix(osg::Matrix::translate(-bs.center())*
|
|
osg::Matrix::scale(size,size,size)*
|
|
osg::Matrix::rotate(osg::inDegrees(-90.0f),0.0f,0.0f,1.0f));
|
|
|
|
positioned->addChild(glider);
|
|
|
|
osg::PositionAttitudeTransform* xform = new osg::PositionAttitudeTransform;
|
|
xform->setDataVariance(osg::Object::DYNAMIC);
|
|
xform->getOrCreateStateSet()->setMode(GL_NORMALIZE, osg::StateAttribute::ON);
|
|
xform->setUpdateCallback(new osg::AnimationPathCallback(animationPath,0.0,0.5));
|
|
xform->addChild(positioned);
|
|
|
|
model->addChild(xform);
|
|
}
|
|
|
|
osg::ref_ptr<osg::Node> cessna = osgDB::readRefNodeFile("cessna.osgt");
|
|
if (cessna)
|
|
{
|
|
const osg::BoundingSphere& bs = cessna->getBound();
|
|
float size = radius/bs.radius()*0.15f;
|
|
|
|
osg::MatrixTransform* positioned = new osg::MatrixTransform;
|
|
positioned->getOrCreateStateSet()->setMode(GL_NORMALIZE, osg::StateAttribute::ON);
|
|
positioned->setDataVariance(osg::Object::STATIC);
|
|
positioned->setMatrix(osg::Matrix::translate(-bs.center())*
|
|
osg::Matrix::scale(size,size,size)*
|
|
osg::Matrix::rotate(osg::inDegrees(180.0f),0.0f,0.0f,1.0f));
|
|
|
|
//positioned->addChild(cessna);
|
|
positioned->addChild(cessna);
|
|
|
|
osg::MatrixTransform* xform = new osg::MatrixTransform;
|
|
xform->setDataVariance(osg::Object::DYNAMIC);
|
|
xform->setUpdateCallback(new osg::AnimationPathCallback(animationPath,0.0f,1.0));
|
|
xform->addChild(positioned);
|
|
|
|
model->addChild(xform);
|
|
}
|
|
|
|
return model.release();
|
|
}
|
|
|
|
|
|
osg::Vec3 computeTerrainIntersection(osg::Node* subgraph,float x,float y)
|
|
{
|
|
const osg::BoundingSphere& bs = subgraph->getBound();
|
|
float zMax = bs.center().z()+bs.radius();
|
|
float zMin = bs.center().z()-bs.radius();
|
|
|
|
osg::ref_ptr<osgUtil::LineSegmentIntersector> intersector =
|
|
new osgUtil::LineSegmentIntersector(osg::Vec3(x,y,zMin),osg::Vec3(x,y,zMax));
|
|
|
|
osgUtil::IntersectionVisitor iv(intersector.get());
|
|
|
|
subgraph->accept(iv);
|
|
|
|
if (intersector->containsIntersections())
|
|
{
|
|
return intersector->getFirstIntersection().getWorldIntersectPoint();
|
|
}
|
|
|
|
return osg::Vec3(x,y,0.0f);
|
|
}
|
|
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
// MAIN SCENE GRAPH BUILDING FUNCTION
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
void build_world(osg::Group *root)
|
|
{
|
|
|
|
osg::Geode* terrainGeode = new osg::Geode;
|
|
// create terrain
|
|
{
|
|
osg::ref_ptr<osg::StateSet> stateset = new osg::StateSet();
|
|
osg::ref_ptr<osg::Image> image = osgDB::readRefImageFile("Images/lz.rgb");
|
|
if (image)
|
|
{
|
|
osg::Texture2D* texture = new osg::Texture2D;
|
|
texture->setImage(image);
|
|
stateset->setTextureAttributeAndModes(0,texture,osg::StateAttribute::ON);
|
|
}
|
|
|
|
terrainGeode->setStateSet( stateset );
|
|
|
|
float size = 1000; // 10km;
|
|
float scale = size/39.0f; // 10km;
|
|
float z_scale = scale*3.0f;
|
|
|
|
osg::HeightField* grid = new osg::HeightField;
|
|
grid->allocate(38,39);
|
|
grid->setXInterval(scale);
|
|
grid->setYInterval(scale);
|
|
|
|
for(unsigned int r=0;r<39;++r)
|
|
{
|
|
for(unsigned int c=0;c<38;++c)
|
|
{
|
|
grid->setHeight(c,r,z_scale*vertex[r+c*39][2]);
|
|
}
|
|
}
|
|
terrainGeode->addDrawable(new osg::ShapeDrawable(grid));
|
|
|
|
root->addChild(terrainGeode);
|
|
}
|
|
|
|
|
|
// create particle effects
|
|
{
|
|
osg::Vec3 position = computeTerrainIntersection(terrainGeode,100.0f,100.0f);
|
|
|
|
osgParticle::ExplosionEffect* explosion = new osgParticle::ExplosionEffect(position, 10.0f);
|
|
osgParticle::ExplosionDebrisEffect* explosionDebri = new osgParticle::ExplosionDebrisEffect(position, 10.0f);
|
|
osgParticle::SmokeEffect* smoke = new osgParticle::SmokeEffect(position, 10.0f);
|
|
osgParticle::FireEffect* fire = new osgParticle::FireEffect(position, 10.0f);
|
|
|
|
explosion->setWind(wind);
|
|
explosionDebri->setWind(wind);
|
|
smoke->setWind(wind);
|
|
fire->setWind(wind);
|
|
|
|
root->addChild(explosion);
|
|
root->addChild(explosionDebri);
|
|
root->addChild(smoke);
|
|
root->addChild(fire);
|
|
}
|
|
|
|
// create particle effects
|
|
{
|
|
osg::Vec3 position = computeTerrainIntersection(terrainGeode,200.0f,100.0f);
|
|
|
|
osgParticle::ExplosionEffect* explosion = new osgParticle::ExplosionEffect(position, 1.0f);
|
|
osgParticle::ExplosionDebrisEffect* explosionDebri = new osgParticle::ExplosionDebrisEffect(position, 1.0f);
|
|
osgParticle::SmokeEffect* smoke = new osgParticle::SmokeEffect(position, 1.0f);
|
|
osgParticle::FireEffect* fire = new osgParticle::FireEffect(position, 1.0f);
|
|
|
|
explosion->setWind(wind);
|
|
explosionDebri->setWind(wind);
|
|
smoke->setWind(wind);
|
|
fire->setWind(wind);
|
|
|
|
root->addChild(explosion);
|
|
root->addChild(explosionDebri);
|
|
root->addChild(smoke);
|
|
root->addChild(fire);
|
|
}
|
|
|
|
// create the moving models.
|
|
{
|
|
root->addChild(createMovingModel(osg::Vec3(500.0f,500.0f,500.0f),300.0f));
|
|
}
|
|
}
|
|
|
|
|
|
// class to handle events with a pick
|
|
class PickHandler : public osgGA::GUIEventHandler {
|
|
public:
|
|
|
|
PickHandler() {}
|
|
|
|
bool handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter& aa)
|
|
{
|
|
switch(ea.getEventType())
|
|
{
|
|
case(osgGA::GUIEventAdapter::PUSH):
|
|
{
|
|
osgViewer::Viewer* viewer = dynamic_cast<osgViewer::Viewer*>(&aa);
|
|
pick(viewer,ea);
|
|
}
|
|
return false;
|
|
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
void pick(osgViewer::Viewer* viewer, const osgGA::GUIEventAdapter& ea)
|
|
{
|
|
osg::Group* root = dynamic_cast<osg::Group*>(viewer->getSceneData());
|
|
if (!root) return;
|
|
|
|
osgUtil::LineSegmentIntersector::Intersections intersections;
|
|
if (viewer->computeIntersections(ea,intersections))
|
|
{
|
|
const osgUtil::LineSegmentIntersector::Intersection& hit = *intersections.begin();
|
|
|
|
bool handleMovingModels = false;
|
|
const osg::NodePath& nodePath = hit.nodePath;
|
|
for(osg::NodePath::const_iterator nitr=nodePath.begin();
|
|
nitr!=nodePath.end();
|
|
++nitr)
|
|
{
|
|
const osg::Transform* transform = dynamic_cast<const osg::Transform*>(*nitr);
|
|
if (transform)
|
|
{
|
|
if (transform->getDataVariance()==osg::Object::DYNAMIC) handleMovingModels=true;
|
|
}
|
|
}
|
|
|
|
osg::Vec3 position = handleMovingModels ? hit.getLocalIntersectPoint() : hit.getWorldIntersectPoint();
|
|
float scale = 10.0f * ((float)rand() / (float)RAND_MAX);
|
|
float intensity = 1.0f;
|
|
|
|
osgParticle::ExplosionEffect* explosion = new osgParticle::ExplosionEffect(position, scale, intensity);
|
|
osgParticle::ExplosionDebrisEffect* explosionDebri = new osgParticle::ExplosionDebrisEffect(position, scale, intensity);
|
|
osgParticle::FireEffect* fire = new osgParticle::FireEffect(position, scale, intensity);
|
|
osgParticle::ParticleEffect* smoke = 0;
|
|
if (handleMovingModels)
|
|
smoke = new osgParticle::SmokeTrailEffect(position, scale, intensity);
|
|
else
|
|
smoke = new osgParticle::SmokeEffect(position, scale, intensity);
|
|
|
|
explosion->setWind(wind);
|
|
explosionDebri->setWind(wind);
|
|
smoke->setWind(wind);
|
|
fire->setWind(wind);
|
|
|
|
osg::Group* effectsGroup = new osg::Group;
|
|
effectsGroup->addChild(explosion);
|
|
effectsGroup->addChild(explosionDebri);
|
|
effectsGroup->addChild(smoke);
|
|
effectsGroup->addChild(fire);
|
|
|
|
|
|
if (handleMovingModels)
|
|
{
|
|
// insert particle effects alongside the hit node, therefore able to track that nodes movement,
|
|
// however, this does require us to insert the ParticleSystem itself into the root of the scene graph
|
|
// separately from the main particle effects group which contains the emitters and programs.
|
|
// the follow code block implements this, note the path for handling particle effects which arn't attached to
|
|
// moving models is easy - just a single line of code!
|
|
|
|
// tell the effects not to attach to the particle system locally for rendering, as we'll handle add it into the
|
|
// scene graph ourselves.
|
|
explosion->setUseLocalParticleSystem(false);
|
|
explosionDebri->setUseLocalParticleSystem(false);
|
|
smoke->setUseLocalParticleSystem(false);
|
|
fire->setUseLocalParticleSystem(false);
|
|
|
|
// find a place to insert the particle effects group alongside the hit node.
|
|
// there are two possible ways that this can be done, either insert it into
|
|
// a pre-existing group along side the hit node, or if no pre existing group
|
|
// is found then this needs to be inserted above the hit node, and then the
|
|
// particle effect can be inserted into this.
|
|
osg::ref_ptr<osg::Node> hitNode = hit.nodePath.back();
|
|
osg::Node::ParentList parents = hitNode->getParents();
|
|
osg::Group* insertGroup = 0;
|
|
unsigned int numGroupsFound = 0;
|
|
for(osg::Node::ParentList::iterator itr=parents.begin();
|
|
itr!=parents.end();
|
|
++itr)
|
|
{
|
|
osg::Group* parent = (*itr);
|
|
if (typeid(*parent)==typeid(osg::Group))
|
|
{
|
|
++numGroupsFound;
|
|
insertGroup = parent;
|
|
}
|
|
}
|
|
if (numGroupsFound==parents.size() && numGroupsFound==1 && insertGroup)
|
|
{
|
|
osg::notify(osg::INFO)<<"PickHandler::pick(,) hit node's parent is a single osg::Group so we can simple the insert the particle effects group here."<<std::endl;
|
|
|
|
// just reuse the existing group.
|
|
insertGroup->addChild(effectsGroup);
|
|
}
|
|
else
|
|
{
|
|
osg::notify(osg::INFO)<<"PickHandler::pick(,) hit node doesn't have an appropriate osg::Group node to insert particle effects into, inserting a new osg::Group."<<std::endl;
|
|
insertGroup = new osg::Group;
|
|
for(osg::Node::ParentList::iterator itr=parents.begin();
|
|
itr!=parents.end();
|
|
++itr)
|
|
{
|
|
(*itr)->replaceChild(hit.nodePath.back(),insertGroup);
|
|
}
|
|
insertGroup->addChild(hitNode.get());
|
|
insertGroup->addChild(effectsGroup);
|
|
}
|
|
|
|
// finally insert the particle systems into a Geode and attach to the root of the scene graph so the particle system
|
|
// can be rendered.
|
|
osg::Geode* geode = new osg::Geode;
|
|
geode->addDrawable(explosion->getParticleSystem());
|
|
geode->addDrawable(explosionDebri->getParticleSystem());
|
|
geode->addDrawable(smoke->getParticleSystem());
|
|
geode->addDrawable(fire->getParticleSystem());
|
|
|
|
root->addChild(geode);
|
|
|
|
}
|
|
else
|
|
{
|
|
// when we don't have moving models we can simple insert the particle effect into the root of the scene graph
|
|
osg::notify(osg::INFO)<<"PickHandler::pick(,) adding particle effects to root node."<<std::endl;
|
|
root->addChild(effectsGroup);
|
|
}
|
|
|
|
#if 0
|
|
osg::Geode* geode = new osg::Geode;
|
|
geode->addDrawable(new osg::ShapeDrawable(new osg::Sphere(position,scale)));
|
|
group->addChild(geode);
|
|
#endif
|
|
|
|
}
|
|
}
|
|
|
|
protected:
|
|
virtual ~PickHandler() {}
|
|
};
|
|
|
|
// function used in debugging
|
|
void insertParticle(osg::Group* root, const osg::Vec3& center, float radius)
|
|
{
|
|
bool handleMovingModels = false;
|
|
|
|
osg::Vec3 position = center +
|
|
osg::Vec3( radius * (((float)rand() / (float)RAND_MAX)-0.5)*2.0,
|
|
radius * (((float)rand() / (float)RAND_MAX)-0.5)*2.0,
|
|
0.0f);
|
|
|
|
float scale = 10.0f * ((float)rand() / (float)RAND_MAX);
|
|
float intensity = 1.0f;
|
|
|
|
osgParticle::ExplosionEffect* explosion = new osgParticle::ExplosionEffect(position, scale, intensity);
|
|
osgParticle::ExplosionDebrisEffect* explosionDebri = new osgParticle::ExplosionDebrisEffect(position, scale, intensity);
|
|
osgParticle::FireEffect* fire = new osgParticle::FireEffect(position, scale, intensity);
|
|
osgParticle::ParticleEffect* smoke = 0;
|
|
if (handleMovingModels)
|
|
smoke = new osgParticle::SmokeTrailEffect(position, scale, intensity);
|
|
else
|
|
smoke = new osgParticle::SmokeEffect(position, scale, intensity);
|
|
|
|
explosion->setWind(wind);
|
|
explosionDebri->setWind(wind);
|
|
smoke->setWind(wind);
|
|
fire->setWind(wind);
|
|
|
|
osg::Group* effectsGroup = new osg::Group;
|
|
effectsGroup->addChild(explosion);
|
|
effectsGroup->addChild(explosionDebri);
|
|
effectsGroup->addChild(smoke);
|
|
effectsGroup->addChild(fire);
|
|
|
|
root->addChild(effectsGroup);
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
// main()
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
int main(int, char **)
|
|
{
|
|
// construct the viewer.
|
|
osgViewer::Viewer viewer;
|
|
|
|
// register the pick handler
|
|
viewer.addEventHandler(new PickHandler());
|
|
|
|
osg::Group *root = new osg::Group;
|
|
build_world(root);
|
|
|
|
osgUtil::Optimizer optimizer;
|
|
optimizer.optimize(root);
|
|
|
|
// add a viewport to the viewer and attach the scene graph.
|
|
viewer.setSceneData(root);
|
|
|
|
return viewer.run();
|
|
}
|