bool
GusdPrimWrapper::updatePrimvarFromGTPrim(
const TfToken& name,
const GT_Owner& owner,
const TfToken& interpolation,
UsdTimeCode time,
const GT_DataArrayHandle& dataIn )
{
GT_DataArrayHandle data = dataIn;
UsdGeomImageable prim( getUsdPrimForWrite() );
// cerr << "updatePrimvarFromGTPrim: "
// << prim.GetPrim().GetPath() << ":" << name << ", " << interpolation
// << ", entries = " << dataIn->entries() << endl;
AttrLastValueKeyType key(owner, name);
auto it = m_lastAttrValueDict.find( key );
if( it == m_lastAttrValueDict.end() ) {
// If we're creating an overlay this primvar might already be
// authored on the prim. If the primvar is indexed we need to
// block the indices attribute, because we flatten indexed
// primvars.
if( UsdGeomPrimvar primvar = prim.GetPrimvar(name) ) {
if( primvar.IsIndexed() ) {
primvar.BlockIndices();
}
}
m_lastAttrValueDict.insert(
std::make_pair(key,
AttrLastValueEntry( time, data->harden())));
GusdGT_Utils::setPrimvarSample( prim, name, data, interpolation, time );
}
else {
AttrLastValueEntry& entry = it->second;
if( data->isEqual( *entry.data )) {
entry.lastCompared = time;
return false;
}
else {
if( entry.lastCompared != entry.lastSet ) {
GusdGT_Utils::setPrimvarSample( prim, name, entry.data, interpolation, entry.lastCompared );
}
if( UsdGeomPrimvar primvar = prim.GetPrimvar(name) ) {
if( primvar.IsIndexed() ) {
primvar.BlockIndices();
}
}
GusdGT_Utils::setPrimvarSample( prim, name, data, interpolation, time );
entry.data = data->harden();
entry.lastSet = entry.lastCompared = time;
return true;
}
}
return true;
}
bool
GusdPrimWrapper::updateAttributeFromGTPrim(
GT_Owner owner,
const std::string& name,
const GT_DataArrayHandle& houAttr,
UsdAttribute& usdAttr,
UsdTimeCode time )
{
// return true if we need to set the value
if( !houAttr || !usdAttr )
return false;
// Check to see if the current value of this attribute has changed
// from the last time we set the value.
AttrLastValueKeyType key(owner, name);
auto it = m_lastAttrValueDict.find( key );
if( it == m_lastAttrValueDict.end()) {
// Set the value for the first time
m_lastAttrValueDict.insert(
std::make_pair(key,
AttrLastValueEntry( time, houAttr->harden())));
GusdGT_Utils::setUsdAttribute(usdAttr, houAttr, time);
return true;
}
else {
AttrLastValueEntry& entry = it->second;
if( houAttr->isEqual( *entry.data )) {
// The value are the as before. Don't set.
entry.lastCompared = time;
return false;
}
else {
if( entry.lastCompared != entry.lastSet ) {
// Set a value on the last frame the previous value was valid.
GusdGT_Utils::setUsdAttribute(usdAttr, entry.data, entry.lastCompared);
}
// set the new value
GusdGT_Utils::setUsdAttribute(usdAttr, houAttr, time);
// save this value to compare on later frames
entry.data = houAttr->harden();
entry.lastSet = entry.lastCompared = time;
return true;
}
}
return false;
}
