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();
}
}
void
USDVMP::setup(FnKat::ViewerModifierInput& input)
{
TF_DEBUG(KATANA_DEBUG_VMP_USD).Msg("%s @ %p : %s\n",
TF_FUNC_NAME().c_str(), this, input.getFullName().c_str());
// The multi-threaded Usd Op may be loading or unloading models on the stage
// we need, so we grab the global lock in reader mode.
boost::shared_lock<boost::upgrade_mutex> readerLock(UsdKatanaGetStageLock());
// Open stage if necessary.
if (not _stage) {
// Get usd file, node path, and current time,
// needed to call TidSceneRenderer
FnKat::StringAttribute usdFileAttr =
input.getAttribute("fileName");
FnKat::StringAttribute usdRootLocationAttr =
input.getAttribute("rootLocation");
FnKat::StringAttribute usdReferencePathAttr =
input.getAttribute("referencePath");
FnKat::StringAttribute variantStringAttr =
input.getAttribute("variants");
FnKat::StringAttribute ignoreLayerAttr=
input.getAttribute("ignoreLayerRegex");
FnKat::FloatAttribute forcePopulateAttr =
input.getAttribute("forcePopulateUsdStage");
std::string usdFile = usdFileAttr.getValue("", false);
std::string usdRootLocation = usdRootLocationAttr.getValue("", false);
std::string usdReferencePath = usdReferencePathAttr.getValue("",false);
std::string variantString = variantStringAttr.getValue("",false);
std::string ignoreLayerRegex = ignoreLayerAttr.getValue("$^", false);
bool forcePopulate = forcePopulateAttr.getValue((float)true,false);
if (usdFile.empty())
return;
_stage = UsdKatanaCache::GetInstance().GetStage(usdFile,
variantString,
ignoreLayerRegex,
forcePopulate);
if (not _stage) {
TF_DEBUG(KATANA_DEBUG_VMP_USD).Msg(
"Cannot resolve path %s", usdFile.c_str());
return;
}
if (usdReferencePath == "")
_prim = _stage->GetPseudoRoot();
else
_prim = _stage->GetPrimAtPath(SdfPath(usdReferencePath));
if (not _prim)
FnLogWarn(std::string("Cannot compose ") +
_prim.GetPath().GetString());
_params.cullStyle = UsdImagingEngine::CULL_STYLE_BACK_UNLESS_DOUBLE_SIDED;
_renderer = UsdKatanaCache::GetInstance()
.GetRenderer(_stage, _prim, variantString);
}
// always update frame time
FnKat::DoubleAttribute currentTimeAttr = input.getAttribute("currentTime");
double currentTime = currentTimeAttr.getValue(0.0, false);
_params.frame = currentTime;
}