SdfLayerRefPtr&
UsdKatanaCache::_FindOrCreateSessionLayer(
FnAttribute::GroupAttribute sessionAttr, std::string rootLocation)
{
// Grab a reader lock for reading the _sessionKeyCache
boost::upgrade_lock<boost::upgrade_mutex>
readerLock(UsdKatanaGetSessionCacheLock());
std::string cacheKey = FnAttribute::GroupAttribute("s", sessionAttr,
"r", FnAttribute::StringAttribute(rootLocation),
true).getHash().str();
// Open the usd stage
SdfLayerRefPtr sessionLayer;
if (_sessionKeyCache.find(cacheKey) == _sessionKeyCache.end())
{
boost::upgrade_to_unique_lock<boost::upgrade_mutex>
writerLock(readerLock);
sessionLayer = SdfLayer::CreateAnonymous();
_sessionKeyCache[cacheKey] = sessionLayer;
std::string rootLocationPlusSlash = rootLocation + "/";
FnAttribute::GroupAttribute variantsAttr =
sessionAttr.getChildByName("variants");
for (int64_t i = 0, e = variantsAttr.getNumberOfChildren(); i != e;
++i)
{
std::string entryName = FnAttribute::DelimiterDecode(
variantsAttr.getChildName(i));
FnAttribute::GroupAttribute entryVariantSets =
variantsAttr.getChildByIndex(i);
if (entryVariantSets.getNumberOfChildren() == 0)
{
continue;
}
if (!pystring::startswith(entryName, rootLocationPlusSlash))
{
continue;
}
std::string primPath = pystring::slice(entryName,
rootLocation.size());
for (int64_t i = 0, e = entryVariantSets.getNumberOfChildren();
i != e; ++i)
{
std::string variantSetName = entryVariantSets.getChildName(i);
FnAttribute::StringAttribute variantValueAttr =
entryVariantSets.getChildByIndex(i);
if (!variantValueAttr.isValid())
{
continue;
}
std::string variantSetSelection =
variantValueAttr.getValue("", false);
SdfPath varSelPath(primPath);
SdfPrimSpecHandle spec = SdfCreatePrimInLayer(
sessionLayer, varSelPath.GetPrimPath());
if (spec)
{
std::pair<std::string, std::string> sel =
varSelPath.GetVariantSelection();
spec->SetVariantSelection(variantSetName,
variantSetSelection);
}
}
}
FnAttribute::GroupAttribute activationsAttr =
sessionAttr.getChildByName("activations");
for (int64_t i = 0, e = activationsAttr.getNumberOfChildren(); i != e;
++i)
{
std::string entryName = FnAttribute::DelimiterDecode(
activationsAttr.getChildName(i));
FnAttribute::IntAttribute stateAttr =
activationsAttr.getChildByIndex(i);
if (stateAttr.getNumberOfValues() != 1)
{
continue;
}
if (!pystring::startswith(entryName, rootLocationPlusSlash))
{
continue;
}
std::string primPath = pystring::slice(entryName,
rootLocation.size());
SdfPath varSelPath(primPath);
SdfPrimSpecHandle spec = SdfCreatePrimInLayer(
sessionLayer, varSelPath.GetPrimPath());
spec->SetActive(stateAttr.getValue());
}
}
return _sessionKeyCache[cacheKey];
}
void InstancerOp::cook(Foundry::Katana::GeolibCookInterface& interface)
{
if (interface.atRoot())
{
interface.stopChildTraversal();
}
// find c argument
FnAttribute::GroupAttribute cGroupAttr = interface.getOpArg("c");
if (cGroupAttr.isValid())
{
if (cGroupAttr.getNumberOfChildren() != 1)
{
Foundry::Katana::ReportError(interface, "Invalid attributes.");
interface.stopChildTraversal();
return;
}
std::string childName = FnAttribute::DelimiterDecode(cGroupAttr.getChildName(0));
FnAttribute::GroupAttribute childArgs = cGroupAttr.getChildByIndex(0);
interface.createChild(childName, "", childArgs);
return;
}
FnAttribute::GroupAttribute aGroupAttr = interface.getOpArg("a");
if (aGroupAttr.isValid())
{
// TODO: cache this with Foundry::Katana::GeolibPrivateData...
std::string sourceLocation;
FnAttribute::StringAttribute sourceLocationAttr = aGroupAttr.getChildByName("sourceLocation");
if (sourceLocationAttr.isValid())
{
sourceLocation = sourceLocationAttr.getValue("", false);
}
FnAttribute::IntAttribute instanceTypeAttr = aGroupAttr.getChildByName("instanceType");
bool threeD = false;
FnAttribute::IntAttribute threeDAttr = aGroupAttr.getChildByName("threeD");
if (threeDAttr.isValid())
{
threeD = threeDAttr.getValue(0, false) == 1;
}
bool floatFormat = false;
FnAttribute::IntAttribute floatFormatMatrixAttr = aGroupAttr.getChildByName("floatFormatMatrix");
if (floatFormatMatrixAttr.isValid())
{
floatFormat = floatFormatMatrixAttr.getValue(0, false) == 1;
}
FnAttribute::IntAttribute numInstancesAttr = aGroupAttr.getChildByName("numInstances");
FnAttribute::IntAttribute groupInstancesAttr = aGroupAttr.getChildByName("groupInstances");
unsigned int numInstances = (unsigned int)numInstancesAttr.getValue(0, false);
if (numInstances == 0)
{
return;
}
bool instanceArray = true;
FnAttribute::IntAttribute instanceArrayAttr = aGroupAttr.getChildByName("instanceArray");
if (instanceArrayAttr.isValid())
{
instanceArray = instanceArrayAttr.getValue(1, false);
}
bool createInstanceIndexAttribute = false;
FnAttribute::IntAttribute createInstanceIndexAttributeAttr = aGroupAttr.getChildByName("createInstanceIndexAttribute");
if (createInstanceIndexAttributeAttr.isValid())
{
createInstanceIndexAttribute = createInstanceIndexAttributeAttr.getValue(1, false);
}
Vec3 areaSpread(20.0f, 20.0f, 20.0f);
FnAttribute::FloatAttribute areaSpreadAttr = aGroupAttr.getChildByName("areaSpread");
if (areaSpreadAttr.isValid())
{
FnKat::FloatConstVector data = areaSpreadAttr.getNearestSample(0);
areaSpread.x = data[0];
areaSpread.y = data[1];
areaSpread.z = data[2];
}
// we're dangerously assuming that this will be run first...
if (!threeD)
{
create2DGrid(numInstances, areaSpread, aTranslates);
}
else
{
create3DGrid(numInstances, areaSpread, aTranslates);
}
if (!instanceArray)
{
bool groupInstances = groupInstancesAttr.getValue(0, false);
if (groupInstances)
{
FnAttribute::IntAttribute groupSizeAttr = aGroupAttr.getChildByName("groupSize");
int groupSize = groupSizeAttr.getValue(0, false);
int groupsNeeded = numInstances / groupSize;
groupsNeeded += (int)(numInstances % groupSize > 0);
int remainingInstances = numInstances;
int indexStartCount = 0;
for (int i = 0; i < groupsNeeded; i++)
{
std::ostringstream ss;
ss << "group_" << i;
int thisGroupSize = (remainingInstances >= groupSize) ? groupSize : remainingInstances;
FnAttribute::GroupBuilder childArgsBuilder;
childArgsBuilder.set("group.index", FnAttribute::IntAttribute(i));
childArgsBuilder.set("group.indexStart", FnAttribute::IntAttribute(indexStartCount));
childArgsBuilder.set("group.size", FnAttribute::IntAttribute(thisGroupSize));
childArgsBuilder.set("group.sourceLoc", FnAttribute::StringAttribute(sourceLocation));
interface.createChild(ss.str(), "", childArgsBuilder.build());
remainingInstances -= thisGroupSize;
indexStartCount += thisGroupSize;
}
}
else
{
for (int i = 0; i < numInstances; i++)
{
std::ostringstream ss;
ss << "instance_" << i;
FnAttribute::GroupBuilder childArgsBuilder;
childArgsBuilder.set("leaf.index", FnAttribute::IntAttribute(i));
childArgsBuilder.set("leaf.sourceLoc", FnAttribute::StringAttribute(sourceLocation));
interface.createChild(ss.str(), "", childArgsBuilder.build());
}
}
}
else
{
// just create a single instance array location
FnAttribute::GroupBuilder geoGb;
geoGb.set("instanceSource", FnAttribute::StringAttribute(sourceLocation));
if (floatFormat)
{
// we can use FloatAttr for instance array types
std::vector<float> aMatrixValues(numInstances * 16, 0.0f);
for (int i = 0; i < numInstances; i++)
{
const Vec3& trans = aTranslates[i];
// set matrix values
unsigned int matrixStartOffset = i * 16;
aMatrixValues[matrixStartOffset] = 1.0f;
aMatrixValues[matrixStartOffset + 5] = 1.0f;
aMatrixValues[matrixStartOffset + 10] = 1.0f;
aMatrixValues[matrixStartOffset + 12] = trans.x;
aMatrixValues[matrixStartOffset + 13] = trans.y;
aMatrixValues[matrixStartOffset + 14] = trans.z;
aMatrixValues[matrixStartOffset + 15] = 1.0f;
}
geoGb.set("instanceMatrix", FnAttribute::FloatAttribute(aMatrixValues.data(), numInstances * 16, 16));
}
else
{
// double format
std::vector<double> aMatrixValues(numInstances * 16, 0.0);
for (int i = 0; i < numInstances; i++)
{
const Vec3& trans = aTranslates[i];
// set matrix values
unsigned int matrixStartOffset = i * 16;
aMatrixValues[matrixStartOffset] = 1.0;
aMatrixValues[matrixStartOffset + 5] = 1.0;
aMatrixValues[matrixStartOffset + 10] = 1.0;
aMatrixValues[matrixStartOffset + 12] = trans.x;
aMatrixValues[matrixStartOffset + 13] = trans.y;
aMatrixValues[matrixStartOffset + 14] = trans.z;
aMatrixValues[matrixStartOffset + 15] = 1.0;
}
geoGb.set("instanceMatrix", FnAttribute::DoubleAttribute(aMatrixValues.data(), numInstances * 16, 16));
}
std::vector<int> aInstanceIndices;
if (createInstanceIndexAttribute)
{
// if we want the optional (for renderers we care about anyway) instanceIndex attribute, add that as well...
// create array of 0, for each index
aInstanceIndices.resize(numInstances, 0);
geoGb.set("instanceIndex", FnAttribute::IntAttribute(aInstanceIndices.data(), numInstances, 1));
}
interface.setAttr("geometry", geoGb.build());
interface.setAttr("type", FnAttribute::StringAttribute("instance array"));
interface.stopChildTraversal();
}
return;
}
FnAttribute::GroupAttribute group = interface.getOpArg("group");
if (group.isValid())
{
FnAttribute::IntAttribute indexStartAttr = group.getChildByName("indexStart");
int indexStart = indexStartAttr.getValue(0, false);
FnAttribute::IntAttribute sizeAttr = group.getChildByName("size");
int size = sizeAttr.getValue(0 , false);
FnAttribute::StringAttribute sourceLocationAttr = group.getChildByName("sourceLoc");
interface.setAttr("type", FnAttribute::StringAttribute("group"));
for (int i = indexStart; i < indexStart + size; i++)
{
std::ostringstream ss;
ss << "instance_" << i;
FnAttribute::GroupBuilder childArgsBuilder;
childArgsBuilder.set("leaf.index", FnAttribute::IntAttribute(i));
childArgsBuilder.set("leaf.sourceLoc", sourceLocationAttr);
interface.createChild(ss.str(), "", childArgsBuilder.build());
}
interface.stopChildTraversal();
}
FnAttribute::GroupAttribute leaf = interface.getOpArg("leaf");
if (leaf.isValid())
{
FnAttribute::IntAttribute indexAttr = leaf.getChildByName("index");
int index = indexAttr.getValue(0 , false);
FnAttribute::GroupBuilder geoGb;
FnAttribute::StringAttribute sourceLocationAttr = leaf.getChildByName("sourceLoc");
if (sourceLocationAttr.isValid())
{
geoGb.set("instanceSource", sourceLocationAttr);
}
interface.setAttr("type", FnAttribute::StringAttribute("instance"));
interface.setAttr("geometry", geoGb.build());
FnAttribute::GroupBuilder xformGb;
const Vec3& trans = aTranslates[index];
double transValues[3] = { trans.x, trans.y, trans.z };
xformGb.set("translate", FnAttribute::DoubleAttribute(transValues, 3, 3));
interface.setAttr("xform", xformGb.build());
interface.stopChildTraversal();
}
}