void ClothImpl<SwCloth>::setVirtualParticles(Range<const uint32_t[4]> indices, Range<const PxVec3> weights)
{
mCloth.mNumVirtualParticles = 0;
// shuffle indices to form independent SIMD sets
uint16_t numParticles = uint16_t(mCloth.mCurParticles.size());
TripletScheduler scheduler(indices);
scheduler.simd(numParticles, 4);
// convert indices to byte offset
Vec4us dummy(numParticles, uint16_t(numParticles+1), uint16_t(numParticles+2), 0);
Vector<uint32_t>::Type::ConstIterator sIt = scheduler.mSetSizes.begin();
Vector<uint32_t>::Type::ConstIterator sEnd = scheduler.mSetSizes.end();
TripletScheduler::ConstTripletIter tIt = scheduler.mTriplets.begin(), tLast;
mCloth.mVirtualParticleIndices.resize(0);
mCloth.mVirtualParticleIndices.reserve(indices.size() + 3 * uint32_t(sEnd - sIt));
for(; sIt != sEnd; ++sIt)
{
uint32_t setSize = *sIt;
for(tLast = tIt + setSize; tIt != tLast; ++tIt, ++mCloth.mNumVirtualParticles)
mCloth.mVirtualParticleIndices.pushBack(Vec4us(*tIt));
mCloth.mVirtualParticleIndices.resize(
(mCloth.mVirtualParticleIndices.size() + 3) & ~3, dummy);
}
Vector<Vec4us>::Type(mCloth.mVirtualParticleIndices.begin(),
mCloth.mVirtualParticleIndices.end()).swap(mCloth.mVirtualParticleIndices);
// precompute 1/dot(w,w)
Vec4fAlignedVector().swap(mCloth.mVirtualParticleWeights);
mCloth.mVirtualParticleWeights.reserve(weights.size());
for(; !weights.empty(); weights.popFront())
{
PxVec3 w = reinterpret_cast<const PxVec3&>(weights.front());
PxReal scale = 1 / w.magnitudeSquared();
mCloth.mVirtualParticleWeights.pushBack(PxVec4(w.x, w.y, w.z, scale));
}
mCloth.notifyChanged();
}
void ClothImpl<SwCloth>::clearParticleAccelerations()
{
Vec4fAlignedVector().swap(mCloth.mParticleAccelerations);
mCloth.wakeUp();
}
