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Subclass ParticleSystem to support limit on the number of particles

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This commit is contained in:
scrawl 2015-03-21 04:28:26 +01:00
parent 2e11642273
commit 71782462b7
3 changed files with 46 additions and 1 deletions
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4
components/nifosg/nifloader.cpp
View file

@ -571,7 +571,7 @@ namespace NifOsg
void Loader::handleParticleSystem(const Nif::Node *nifNode, osg::Group *parentNode, int animflags, int particleflags)
{
osg::ref_ptr<osgParticle::ParticleSystem> partsys (new osgParticle::ParticleSystem);
osg::ref_ptr<ParticleSystem> partsys (new ParticleSystem);
partsys->setSortMode(osgParticle::ParticleSystem::SORT_BACK_TO_FRONT);
const Nif::NiAutoNormalParticlesData *particledata = NULL;
@ -630,6 +630,8 @@ namespace NifOsg
created->setSizeRange(osgParticle::rangef(size, size));
}
partsys->setQuota(partctrl->numParticles);
partsys->getDefaultParticleTemplate().setSizeRange(osgParticle::rangef(partctrl->size, partctrl->size));
partsys->getDefaultParticleTemplate().setColorRange(osgParticle::rangev4(osg::Vec4f(1.f,1.f,1.f,1.f), osg::Vec4f(1.f,1.f,1.f,1.f)));
partsys->getDefaultParticleTemplate().setAlphaRange(osgParticle::rangef(1.f, 1.f));

26
components/nifosg/particle.cpp
View file

@ -1,5 +1,7 @@
#include "particle.hpp"
#include <limits>
#include <osg/MatrixTransform>
#include <components/nif/controlled.hpp>
@ -9,6 +11,30 @@
namespace NifOsg
{
ParticleSystem::ParticleSystem()
: osgParticle::ParticleSystem()
, mQuota(std::numeric_limits<int>::max())
{
}
ParticleSystem::ParticleSystem(const ParticleSystem &copy, const osg::CopyOp &copyop)
: osgParticle::ParticleSystem(copy, copyop)
, mQuota(copy.mQuota)
{
}
void ParticleSystem::setQuota(int quota)
{
mQuota = quota;
}
osgParticle::Particle* ParticleSystem::createParticle(const osgParticle::Particle *ptemplate)
{
if (numParticles()-numDeadParticles() < mQuota)
return osgParticle::ParticleSystem::createParticle(ptemplate);
return NULL;
}
void InverseWorldMatrix::operator()(osg::Node *node, osg::NodeVisitor *nv)
{
if (nv && nv->getVisitorType() == osg::NodeVisitor::UPDATE_VISITOR)

17
components/nifosg/particle.hpp
View file

@ -20,6 +20,23 @@ namespace Nif
namespace NifOsg
{
// Subclass ParticleSystem to support a limit on the number of active particles.
class ParticleSystem : public osgParticle::ParticleSystem
{
public:
ParticleSystem();
ParticleSystem(const ParticleSystem& copy, const osg::CopyOp& copyop);
META_Object(NifOsg, NifOsg::ParticleSystem)
virtual osgParticle::Particle* createParticle(const osgParticle::Particle *ptemplate);
void setQuota(int quota);
private:
int mQuota;
};
// HACK: Particle doesn't allow setting the initial age, but we need this for loading the particle system state
class ParticleAgeSetter : public osgParticle::Particle
{