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Add world space particle systems, will need more changes when emitters are added

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This commit is contained in:
scrawl 2015-03-17 22:34:30 +01:00
parent 510375aa63
commit f843e12538
2 changed files with 43 additions and 5 deletions
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1
apps/nifosgtest/test.cpp
View file

@ -11,7 +11,6 @@
#include <osgGA/TrackballManipulator>
#include <osgDB/Registry>
#include <osgDB/WriteFile>
#include <osg/PolygonMode>

47
components/nifosg/nifloader.cpp
View file

@ -192,11 +192,37 @@ namespace
}
};
// Node callback used to set the inverse of the parent's world matrix on the MatrixTransform
// that the callback is attached to. Used for certain particle systems,
// so that the particles do not move with the node they are attached to.
class InverseWorldMatrix : public osg::NodeCallback
{
public:
InverseWorldMatrix()
{
}
void operator()(osg::Node* node, osg::NodeVisitor* nv)
{
if (nv && nv->getVisitorType() == osg::NodeVisitor::UPDATE_VISITOR)
{
osg::NodePath path = nv->getNodePath();
path.pop_back();
osg::MatrixTransform* trans = dynamic_cast<osg::MatrixTransform*>(node);
osg::Matrix worldMat = osg::computeLocalToWorld( path );
trans->setMatrix(osg::Matrix::inverse(worldMat));
}
traverse(node,nv);
}
};
osg::ref_ptr<osg::Geometry> handleMorphGeometry(const Nif::NiGeomMorpherController* morpher)
{
osg::ref_ptr<osgAnimation::MorphGeometry> morphGeom = new osgAnimation::MorphGeometry;
morphGeom->setMethod(osgAnimation::MorphGeometry::RELATIVE);
// NIF format doesn't specify morphed normals
// No normals available in the MorphData
morphGeom->setMorphNormals(false);
const std::vector<Nif::NiMorphData::MorphData>& morphs = morpher->data.getPtr()->mMorphs;
@ -499,6 +525,10 @@ namespace NifOsg
if (!partctrl)
return;
osg::Matrix particletransform;
if (!(particleflags & Nif::NiNode::ParticleFlag_LocalSpace))
particletransform = getWorldTransform(nifNode);
int i=0;
for (std::vector<Nif::NiParticleSystemController::Particle>::const_iterator it = partctrl->particles.begin();
i<particledata->activeCount && it != partctrl->particles.end(); ++it, ++i)
@ -509,8 +539,8 @@ namespace NifOsg
osgParticle::Particle* created = partsys->createParticle(&particletemplate);
created->setLifeTime(500);//std::max(0.f, particle.lifespan));
created->setVelocity(particle.velocity);
created->setPosition(particledata->vertices.at(particle.vertex));
created->setVelocity(particle.velocity * particletransform);
created->setPosition(particledata->vertices.at(particle.vertex) * particletransform);
osg::Vec4f partcolor (1.f,1.f,1.f,1.f);
if (particle.vertex < int(particledata->colors.size()))
@ -534,7 +564,16 @@ namespace NifOsg
partsys->getOrCreateStateSet()->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
osg::ref_ptr<osg::Geode> geode (new osg::Geode);
geode->addDrawable(partsys);
parentNode->addChild(geode);
if (particleflags & Nif::NiNode::ParticleFlag_LocalSpace)
parentNode->addChild(geode);
else
{
osg::MatrixTransform* trans = new osg::MatrixTransform;
trans->setUpdateCallback(new InverseWorldMatrix);
trans->addChild(geode);
parentNode->addChild(trans);
}
osgParticle::ParticleSystemUpdater* updater = new osgParticle::ParticleSystemUpdater;
updater->addParticleSystem(partsys);