bool VortexParticleAffector::affect(ParticleSystemRefPtr System, Int32 ParticleIndex, const Time& elps)
{
if(getBeacon() != NULL)
{
Matrix BeaconToWorld(getBeacon()->getToWorld());
Vec3f translation, tmp;
Quaternion tmp2;
BeaconToWorld.getTransform(translation,tmp2,tmp,tmp2);
Pnt3f particlePos = System->getPosition(ParticleIndex);
Real32 distanceFromAffector = particlePos.dist(Pnt3f(translation.x(),translation.y(),translation.z()));
if((getMaxDistance() < 0.0) || (distanceFromAffector <= getMaxDistance())) //only affect the particle if it is in range
{
Vec3f particleDirectionFromVortex(particlePos.x() - translation.x(), particlePos.y() - translation.y(), particlePos.z() - translation.z());
particleDirectionFromVortex = particleDirectionFromVortex.cross(getVortexAxis());
particleDirectionFromVortex.normalize();
particleDirectionFromVortex = particleDirectionFromVortex *
((-getMagnitude() *
elps)/OSG::osgClamp<Real32>(1.0f,std::pow(distanceFromAffector,getAttenuation()),TypeTraits<Real32>::getMax()));
System->setVelocity(particleDirectionFromVortex + System->getVelocity(ParticleIndex),ParticleIndex);
}
}
return false;
}
bool TurbulenceParticleAffector::affect(ParticleSystemRefPtr System, Int32 ParticleIndex, const Time& elps)
{
if(getBeacon() != NULL)
{
Matrix BeaconToWorld(getBeacon()->getToWorld());
Vec3f translation, tmp;
Quaternion tmp2;
BeaconToWorld.getTransform(translation,tmp2,tmp,tmp2);
Pnt3f particlePos = System->getPosition(ParticleIndex);
Real32 distanceFromAffector = particlePos.dist(Pnt3f(translation.x(),translation.y(),translation.z()));
if((getMaxDistance() < 0.0) || (distanceFromAffector <= getMaxDistance())) //only affect the particle if it is in range
{
Real32 Xparam, Yparam, Zparam;
Pnt3f pos(System->getPosition(ParticleIndex));
getPerlinDistribution()->setPhase(getPhase()[0]);
Xparam = getPerlinDistribution()->generate(pos[0]);
getPerlinDistribution()->setPhase(getPhase()[1]);
Yparam = getPerlinDistribution()->generate(pos[1]);
getPerlinDistribution()->setPhase(getPhase()[2]);
Zparam = getPerlinDistribution()->generate(pos[2]);
Vec3f fieldAffect(Vec3f(Xparam, Yparam, Zparam));
fieldAffect = fieldAffect * (getAmplitude()*
(elps/(OSG::osgClamp<Real32>(1.0f,std::pow(distanceFromAffector,getAttenuation()),TypeTraits<Real32>::getMax()))));
System->setVelocity(System->getVelocity(ParticleIndex) + fieldAffect, ParticleIndex);
} // end distance conditional
} // end null beacon conditional
return false;
}
bool RandomMovementParticleAffector::affect(ParticleSystemRefPtr System, Int32 ParticleIndex, const Time& elps)
{
//System->setUpdateSecAttribs(false);
Real32 x,
y,
z,
age(System->getAge(ParticleIndex));
if(getAttributeAffected() == VELOCITY_ATTRIBUTE)
{
Vec3f vel = System->getSecVelocity(ParticleIndex);
// grab each value independently , and adjust the phase for each
// axis, since we have a 3D phase and the 1D distribution only takes
// one value
Real32 velSum = vel.x() + vel.y() + vel.z();
getPerlinDistribution()->setPhase(getPhase().x() + velSum);
x = getPerlinDistribution()->generate(vel.x() + age);
getPerlinDistribution()->setPhase(getPhase().y() + velSum);
y = getPerlinDistribution()->generate(vel.y() + age);
getPerlinDistribution()->setPhase(getPhase().z() + velSum);
z = getPerlinDistribution()->generate(vel.z() + age);
System->setVelocity(Vec3f(x,y,z) + vel,ParticleIndex);
}else // affecting position
{
Pnt3f pos = System->getSecPosition(ParticleIndex);
Real32 posSum = pos.x() + pos.y() + pos.z();
getPerlinDistribution()->setPhase(getPhase().x() + posSum);
x = getPerlinDistribution()->generate(pos.x() + age);
getPerlinDistribution()->setPhase(getPhase().y() + posSum);
y = getPerlinDistribution()->generate(pos.y() + age);
getPerlinDistribution()->setPhase(getPhase().z() + posSum);
z = getPerlinDistribution()->generate(pos.z() + age);
System->setPosition(Pnt3f(x,y,z) + pos.subZero(),ParticleIndex);
}
return false;
}