PXR_NAMESPACE_OPEN_SCOPE
PxrUsdKatanaUsdInPrivateData::PxrUsdKatanaUsdInPrivateData(
const UsdPrim& prim,
PxrUsdKatanaUsdInArgsRefPtr usdInArgs,
const PxrUsdKatanaUsdInPrivateData* parentData)
: _prim(prim), _usdInArgs(usdInArgs), _extGb(0)
{
// XXX: manually track instance and master path for possible
// relationship re-retargeting. This approach does not yet
// support nested instances -- which is expected to be handled
// via the forthcoming GetMasterWithContext.
//
if (prim.IsInstance())
{
if (prim.IsInMaster() && parentData)
{
SdfPath descendentPrimPath =
prim.GetPath().ReplacePrefix(
prim.GetPath().GetPrefixes()[0],
SdfPath::ReflexiveRelativePath());
_instancePath = parentData->GetInstancePath().AppendPath(
descendentPrimPath);
}
else
{
_instancePath = prim.GetPath();
}
const UsdPrim& masterPrim = prim.GetMaster();
if (masterPrim)
{
_masterPath = masterPrim.GetPath();
}
}
else if (parentData)
{
// Pass along instance and master paths to children.
//
if (!parentData->GetInstancePath().IsEmpty())
{
_instancePath = parentData->GetInstancePath();
}
if (!parentData->GetMasterPath().IsEmpty())
{
_masterPath = parentData->GetMasterPath();
}
}
//
// Apply session overrides for motion.
//
const std::string primPath = prim.GetPrimPath().GetString();
const std::string isolatePath = usdInArgs->GetIsolatePath();
const std::string sessionPath = usdInArgs->GetSessionLocationPath();
FnKat::GroupAttribute sessionAttr = usdInArgs->GetSessionAttr();
// XXX: If an isolatePath has been specified, it means the PxrUsdIn is
// probably loading USD contents below the USD root. This can prevent
// overrides from trickling down the hierarchy, e.g. the overrides for /A/B
// won't get applied to children if the isolatePath is /A/B/C/D.
//
// So, if the usdInArgs suggest that an isolatePath has been specified and
// we don't have any parentData, we'll need to check if there are overrides
// for the prim and any of its parents.
//
std::vector<std::string> pathsToCheck;
if (!parentData and !isolatePath.empty() and
pystring::startswith(primPath, isolatePath+"/"))
{
std::vector<std::string> parentLocs;
Foundry::Katana::Util::Path::GetLocationStack(parentLocs, primPath);
std::reverse(std::begin(parentLocs), std::end(parentLocs));
for (size_t i = 0; i < parentLocs.size(); ++i)
{
pathsToCheck.push_back(FnKat::DelimiterEncode(
sessionPath + parentLocs[i]));
}
}
else
{
pathsToCheck.push_back(FnKat::DelimiterEncode(sessionPath + primPath));
}
//
// If a session override is specified, use its value. If no override exists,
// try asking the parent data for its value. Otherwise, fall back on the
// usdInArgs value.
//
bool overrideFound;
// Current time.
//
overrideFound = false;
for (size_t i = 0; i < pathsToCheck.size(); ++i)
{
FnKat::FloatAttribute currentTimeAttr =
sessionAttr.getChildByName(
"overrides."+pathsToCheck[i]+".currentTime");
if (currentTimeAttr.isValid())
{
_currentTime = currentTimeAttr.getValue();
overrideFound = true;
break;
}
}
if (!overrideFound)
{
if (parentData)
{
_currentTime = parentData->GetCurrentTime();
}
else
{
_currentTime = usdInArgs->GetCurrentTime();
}
}
// Shutter open.
//
overrideFound = false;
for (size_t i = 0; i < pathsToCheck.size(); ++i)
{
FnKat::FloatAttribute shutterOpenAttr =
sessionAttr.getChildByName(
"overrides."+pathsToCheck[i]+".shutterOpen");
if (shutterOpenAttr.isValid())
{
_shutterOpen = shutterOpenAttr.getValue();
overrideFound = true;
break;
}
}
if (!overrideFound)
{
if (parentData)
{
_shutterOpen = parentData->GetShutterOpen();
}
else
{
_shutterOpen = usdInArgs->GetShutterOpen();
}
}
// Shutter close.
//
overrideFound = false;
for (size_t i = 0; i < pathsToCheck.size(); ++i)
{
FnKat::FloatAttribute shutterCloseAttr =
sessionAttr.getChildByName(
"overrides."+pathsToCheck[i]+".shutterClose");
if (shutterCloseAttr.isValid())
{
_shutterClose = shutterCloseAttr.getValue();
overrideFound = true;
break;
}
}
if (!overrideFound)
{
if (parentData)
{
_shutterClose = parentData->GetShutterClose();
}
else
{
_shutterClose = usdInArgs->GetShutterClose();
}
}
// Motion sample times.
//
// Fallback logic is a little more complicated for motion sample times, as
// they can vary per attribute, so store both the overridden and the
// fallback motion sample times for use inside GetMotionSampleTimes.
//
for (size_t i = 0; i < pathsToCheck.size(); ++i)
{
FnKat::Attribute motionSampleTimesAttr =
sessionAttr.getChildByName(
"overrides."+pathsToCheck[i]+".motionSampleTimes");
if (motionSampleTimesAttr.isValid())
{
// Interpret an IntAttribute as "use usdInArgs defaults"
//
if (motionSampleTimesAttr.getType() == kFnKatAttributeTypeInt)
{
_motionSampleTimesOverride = usdInArgs->GetMotionSampleTimes();
break;
}
// Interpret a FloatAttribute as an explicit value override
//
if (motionSampleTimesAttr.getType() == kFnKatAttributeTypeFloat)
{
const auto& sampleTimes = FnKat::FloatAttribute(
motionSampleTimesAttr).getNearestSample(0);
if (!sampleTimes.empty())
{
for (float sampleTime : sampleTimes)
_motionSampleTimesOverride.push_back(
(double)sampleTime);
break;
}
}
}
}
if (parentData)
{
_motionSampleTimesFallback = parentData->GetMotionSampleTimes();
}
else
{
_motionSampleTimesFallback = usdInArgs->GetMotionSampleTimes();
}
}
UsdSchemaBase::UsdSchemaBase(const UsdPrim& prim)
: _primData(prim._Prim())
, _primPath(prim.GetPrimPath())
{
/* NOTHING */
}