Example #1
0
UsdVolVolume::FieldMap
UsdVolVolume::GetFieldPaths() const
{
    std::map<TfToken, SdfPath> fieldMap;
    const UsdPrim &prim = GetPrim();

    if (prim) {
        std::vector<UsdProperty> fieldProps =
            prim.GetPropertiesInNamespace(_tokens->fieldPrefix);
        for (const UsdProperty &fieldProp : fieldProps) {
            UsdRelationship fieldRel = fieldProp.As<UsdRelationship>();
            SdfPathVector targets;

            // All relationships starting with "field:" should point to
            // UsdVolFieldBase primitives.
            if (fieldRel && fieldRel.GetForwardedTargets(&targets)) {
                if (targets.size() == 1 && 
                    targets.front().IsPrimPath()) {
                    fieldMap.emplace(fieldRel.GetBaseName(), targets.front());
                }
            }
        }
    }

    return fieldMap;
}
Example #2
0
static SdfPathVector
_GetForwardedTargets(const UsdRelationship &self,
                     bool forwardToObjectsInMasters)
{
    SdfPathVector result;
    self.GetForwardedTargets(&result, forwardToObjectsInMasters);
    return result;
}
bool
UsdRiStatementsAPI::GetModelScopedCoordinateSystems(SdfPathVector *targets) const
{
    if (GetPrim().IsModel()) {
        UsdRelationship rel =
            GetPrim().GetRelationship(_tokens->modelScopedCoordsys);
        return rel && rel.GetForwardedTargets(targets);
    }

    return true;
}
Example #4
0
SdfPath
UsdVolVolume::GetFieldPath(const TfToken &name) const
{
    UsdRelationship fieldRel =  GetPrim().GetRelationship(_MakeNamespaced(name));
    SdfPathVector targets;
    
    if (fieldRel && fieldRel.GetForwardedTargets(&targets)) {
        if (targets.size() == 1 && 
            targets.front().IsPrimPath()) {
            return targets.front();
        }
    }

    return SdfPath::EmptyPath();
}
Example #5
0
PXR_NAMESPACE_OPEN_SCOPE


// TODO: We should centralize this logic in a UsdImaging ShaderAdapter.

/*static*/
UsdPrim
UsdImaging_MaterialStrategy::GetTargetedShader(UsdPrim const& materialPrim,
                                        UsdRelationship const& materialRel)
{
    SdfPathVector targets;
    if (!materialRel.GetForwardedTargets(&targets))
        return UsdPrim();

    if (targets.size() != 1) {
        // XXX: This should really be a validation error once USD gets that
        // feature.
        TF_WARN("We expect only one target on relationship %s of prim <%s>, "
                "but got %zu.",
                materialRel.GetName().GetText(),
                materialPrim.GetPath().GetText(),
                targets.size());
        return UsdPrim();
    }

    if (!targets[0].IsPrimPath()) {
        // XXX: This should really be a validation error once USD gets that
        // feature.
        TF_WARN("We expect the target of the relationship %s of prim <%s> "
                "to be a prim, instead it is <%s>.",
                materialRel.GetName().GetText(),
                materialPrim.GetPath().GetText(),
                targets[0].GetText());
        return UsdPrim();
    }

    return materialPrim.GetStage()->GetPrimAtPath(targets[0]);
}
Example #6
0
void
PxrUsdKatanaReadPointInstancer(
        const UsdGeomPointInstancer& instancer,
        const PxrUsdKatanaUsdInPrivateData& data,
        PxrUsdKatanaAttrMap& instancerAttrMap,
        PxrUsdKatanaAttrMap& sourcesAttrMap,
        PxrUsdKatanaAttrMap& instancesAttrMap,
        PxrUsdKatanaAttrMap& inputAttrMap)
{
    const double currentTime = data.GetCurrentTime();

    PxrUsdKatanaReadXformable(instancer, data, instancerAttrMap);

    // Get primvars for setting later. Unfortunatley, the only way to get them
    // out of the attr map is to build it, which will cause its contents to be
    // cleared. We'll need to restore its contents before continuing.
    //
    FnKat::GroupAttribute instancerAttrs = instancerAttrMap.build();
    FnKat::GroupAttribute primvarAttrs =
            instancerAttrs.getChildByName("geometry.arbitrary");
    for (int64_t i = 0; i < instancerAttrs.getNumberOfChildren(); ++i)
    {
        instancerAttrMap.set(instancerAttrs.getChildName(i),
                instancerAttrs.getChildByIndex(i));
    }

    instancerAttrMap.set("type", FnKat::StringAttribute("usd point instancer"));

    const std::string fileName = data.GetUsdInArgs()->GetFileName();
    instancerAttrMap.set("info.usd.fileName", FnKat::StringAttribute(fileName));

    FnKat::GroupAttribute inputAttrs = inputAttrMap.build();

    const std::string katOutputPath = FnKat::StringAttribute(
            inputAttrs.getChildByName("outputLocationPath")).getValue("", false);
    if (katOutputPath.empty())
    {
        _LogAndSetError(instancerAttrMap, "No output location path specified");
        return;
    }

    //
    // Validate instancer data.
    //

    const std::string instancerPath = instancer.GetPath().GetString();

    UsdStageWeakPtr stage = instancer.GetPrim().GetStage();

    // Prototypes (required)
    //
    SdfPathVector protoPaths;
    instancer.GetPrototypesRel().GetTargets(&protoPaths);
    if (protoPaths.empty())
    {
        _LogAndSetError(instancerAttrMap, "Instancer has no prototypes");
        return;
    }

    _PathToPrimMap primCache;
    for (auto protoPath : protoPaths) {
        const UsdPrim &protoPrim = stage->GetPrimAtPath(protoPath);
        primCache[protoPath] = protoPrim;
    }

    // Indices (required)
    //
    VtIntArray protoIndices;
    if (!instancer.GetProtoIndicesAttr().Get(&protoIndices, currentTime))
    {
        _LogAndSetError(instancerAttrMap, "Instancer has no prototype indices");
        return;
    }
    const size_t numInstances = protoIndices.size();
    if (numInstances == 0)
    {
        _LogAndSetError(instancerAttrMap, "Instancer has no prototype indices");
        return;
    }
    for (auto protoIndex : protoIndices)
    {
        if (protoIndex < 0 || static_cast<size_t>(protoIndex) >= protoPaths.size())
        {
            _LogAndSetError(instancerAttrMap, TfStringPrintf(
                    "Out of range prototype index %d", protoIndex));
            return;
        }
    }

    // Mask (optional)
    //
    std::vector<bool> pruneMaskValues =
            instancer.ComputeMaskAtTime(currentTime);
    if (!pruneMaskValues.empty() and pruneMaskValues.size() != numInstances)
    {
        _LogAndSetError(instancerAttrMap,
                "Mismatch in length of indices and mask");
        return;
    }

    // Positions (required)
    //
    UsdAttribute positionsAttr = instancer.GetPositionsAttr();
    if (!positionsAttr.HasValue())
    {
        _LogAndSetError(instancerAttrMap, "Instancer has no positions");
        return;
    }

    //
    // Compute instance transform matrices.
    //

    const double timeCodesPerSecond = stage->GetTimeCodesPerSecond();

    // Gather frame-relative sample times and add them to the current time to
    // generate absolute sample times.
    //
    const std::vector<double> &motionSampleTimes =
        data.GetMotionSampleTimes(positionsAttr);
    const size_t sampleCount = motionSampleTimes.size();
    std::vector<UsdTimeCode> sampleTimes(sampleCount);
    for (size_t a = 0; a < sampleCount; ++a)
    {
        sampleTimes[a] = UsdTimeCode(currentTime + motionSampleTimes[a]);
    }

    // Get velocityScale from the opArgs.
    //
    float velocityScale = FnKat::FloatAttribute(
        inputAttrs.getChildByName("opArgs.velocityScale")).getValue(1.0f, false);

    // XXX Replace with UsdGeomPointInstancer::ComputeInstanceTransformsAtTime.
    //
    std::vector<std::vector<GfMatrix4d>> xformSamples(sampleCount);
    const size_t numXformSamples =
        _ComputeInstanceTransformsAtTime(xformSamples, instancer, sampleTimes,
            UsdTimeCode(currentTime), timeCodesPerSecond, numInstances,
            positionsAttr, velocityScale);
    if (numXformSamples == 0) {
        _LogAndSetError(instancerAttrMap, "Could not compute "
                                          "sample/topology-invarying instance "
                                          "transform matrix");
        return;
    }

    //
    // Compute prototype bounds.
    //

    bool aggregateBoundsValid = false;
    std::vector<double> aggregateBounds;

    // XXX Replace with UsdGeomPointInstancer::ComputeExtentAtTime.
    //
    VtVec3fArray aggregateExtent;
    if (_ComputeExtentAtTime(
            aggregateExtent, data.GetUsdInArgs(), xformSamples,
            motionSampleTimes, protoIndices, protoPaths, primCache,
            pruneMaskValues)) {
        aggregateBoundsValid = true;
        aggregateBounds.resize(6);
        aggregateBounds[0] = aggregateExtent[0][0]; // min x
        aggregateBounds[1] = aggregateExtent[1][0]; // max x
        aggregateBounds[2] = aggregateExtent[0][1]; // min y
        aggregateBounds[3] = aggregateExtent[1][1]; // max y
        aggregateBounds[4] = aggregateExtent[0][2]; // min z
        aggregateBounds[5] = aggregateExtent[1][2]; // max z
    }

    //
    // Build sources. Keep track of which instances use them.
    //

    FnGeolibServices::StaticSceneCreateOpArgsBuilder sourcesBldr(false);

    std::vector<int> instanceIndices;
    instanceIndices.reserve(numInstances);

    std::vector<std::string> instanceSources;
    instanceSources.reserve(protoPaths.size());

    std::map<std::string, int> instanceSourceIndexMap;

    std::vector<int> omitList;
    omitList.reserve(numInstances);

    std::map<SdfPath, std::string> protoPathsToKatPaths;

    for (size_t i = 0; i < numInstances; ++i)
    {
        int index = protoIndices[i];

        // Check to see if we are pruned.
        //
        bool isPruned = (!pruneMaskValues.empty() and
                         pruneMaskValues[i] == false);
        if (isPruned)
        {
            omitList.push_back(i);
        }

        const SdfPath &protoPath = protoPaths[index];

        // Compute the full (Katana) path to this prototype.
        //
        std::string fullProtoPath;
        std::map<SdfPath, std::string>::const_iterator pptkpIt =
                protoPathsToKatPaths.find(protoPath);
        if (pptkpIt != protoPathsToKatPaths.end())
        {
            fullProtoPath = pptkpIt->second;
        }
        else
        {
            _PathToPrimMap::const_iterator pcIt = primCache.find(protoPath);
            const UsdPrim &protoPrim = pcIt->second;
            if (!protoPrim) {
                continue;
            }

            // Determine where (what path) to start building the prototype prim
            // such that its material bindings will be preserved. This could be
            // the prototype path itself or an ancestor path.
            //
            SdfPathVector commonPrefixes;

            UsdRelationship materialBindingsRel =
                    UsdShadeMaterial::GetBindingRel(protoPrim);

            auto assetAPI = UsdModelAPI(protoPrim);
            std::string assetName;
            bool isReferencedModelPrim =
                    assetAPI.IsModel() and assetAPI.GetAssetName(&assetName);

            if (!materialBindingsRel or isReferencedModelPrim)
            {
                // The prim has no material bindings or is a referenced model
                // prim (meaning that materials are defined below it); start
                // building at the prototype path.
                //
                commonPrefixes.push_back(protoPath);
            }
            else
            {
                SdfPathVector materialPaths;
                materialBindingsRel.GetForwardedTargets(&materialPaths);
                for (auto materialPath : materialPaths)
                {
                    const SdfPath &commonPrefix =
                            protoPath.GetCommonPrefix(materialPath);
                    if (commonPrefix.GetString() == "/")
                    {
                        // XXX Unhandled case.
                        // The prototype prim and its material are not under the
                        // same parent; start building at the prototype path
                        // (although it is likely that bindings will be broken).
                        //
                        commonPrefixes.push_back(protoPath);
                    }
                    else
                    {
                        // Start building at the common ancestor between the
                        // prototype prim and its material.
                        //
                        commonPrefixes.push_back(commonPrefix);
                    }
                }
            }

            // XXX Unhandled case.
            // We'll use the first common ancestor even if there is more than
            // one (which shouldn't appen if the prototype prim and its bindings
            // are under the same parent).
            //
            SdfPath::RemoveDescendentPaths(&commonPrefixes);
            const std::string buildPath = commonPrefixes[0].GetString();

            // See if the path is a child of the point instancer. If so, we'll
            // match its hierarchy. If not, we'll put it under a 'prototypes'
            // group.
            //
            std::string relBuildPath;
            if (pystring::startswith(buildPath, instancerPath + "/"))
            {
                relBuildPath = pystring::replace(
                        buildPath, instancerPath + "/", "");
            }
            else
            {
                relBuildPath = "prototypes/" +
                        FnGeolibUtil::Path::GetLeafName(buildPath);
            }

            // Start generating the full path to the prototype.
            //
            fullProtoPath = katOutputPath + "/" + relBuildPath;

            // Make the common ancestor our instance source.
            //
            sourcesBldr.setAttrAtLocation(relBuildPath,
                    "type", FnKat::StringAttribute("instance source"));

            // Author a tracking attr.
            //
            sourcesBldr.setAttrAtLocation(relBuildPath,
                    "info.usd.sourceUsdPath",
                    FnKat::StringAttribute(buildPath));

            // Tell the BuildIntermediate op to start building at the common
            // ancestor.
            //
            sourcesBldr.setAttrAtLocation(relBuildPath,
                    "usdPrimPath", FnKat::StringAttribute(buildPath));
            sourcesBldr.setAttrAtLocation(relBuildPath,
                    "usdPrimName", FnKat::StringAttribute("geo"));

            if (protoPath.GetString() != buildPath)
            {
                // Finish generating the full path to the prototype.
                //
                fullProtoPath = fullProtoPath + "/geo" + pystring::replace(
                        protoPath.GetString(), buildPath, "");
            }

            // Create a mapping that will link the instance's index to its
            // prototype's full path.
            //
            instanceSourceIndexMap[fullProtoPath] = instanceSources.size();
            instanceSources.push_back(fullProtoPath);

            // Finally, store the full path in the map so we won't have to do
            // this work again.
            //
            protoPathsToKatPaths[protoPath] = fullProtoPath;
        }

        instanceIndices.push_back(instanceSourceIndexMap[fullProtoPath]);
    }

    //
    // Build instances.
    //

    FnGeolibServices::StaticSceneCreateOpArgsBuilder instancesBldr(false);

    instancesBldr.createEmptyLocation("instances", "instance array");

    instancesBldr.setAttrAtLocation("instances",
            "geometry.instanceSource",
                    FnKat::StringAttribute(instanceSources, 1));

    instancesBldr.setAttrAtLocation("instances",
            "geometry.instanceIndex",
                    FnKat::IntAttribute(&instanceIndices[0],
                            instanceIndices.size(), 1));

    FnKat::DoubleBuilder instanceMatrixBldr(16);
    for (size_t a = 0; a < numXformSamples; ++a) {

        double relSampleTime = motionSampleTimes[a];

        // Shove samples into the builder at the frame-relative sample time. If
        // motion is backwards, make sure to reverse time samples.
        std::vector<double> &matVec = instanceMatrixBldr.get(
            data.IsMotionBackward()
                ? PxrUsdKatanaUtils::ReverseTimeSample(relSampleTime)
                : relSampleTime);

        matVec.reserve(16 * numInstances);
        for (size_t i = 0; i < numInstances; ++i) {

            GfMatrix4d instanceXform = xformSamples[a][i];
            const double *matArray = instanceXform.GetArray();

            for (int j = 0; j < 16; ++j) {
                matVec.push_back(matArray[j]);
            }
        }
    }
    instancesBldr.setAttrAtLocation("instances",
            "geometry.instanceMatrix", instanceMatrixBldr.build());

    if (!omitList.empty())
    {
        instancesBldr.setAttrAtLocation("instances",
                "geometry.omitList",
                        FnKat::IntAttribute(&omitList[0], omitList.size(), 1));
    }

    instancesBldr.setAttrAtLocation("instances",
            "geometry.pointInstancerId",
                    FnKat::StringAttribute(katOutputPath));

    //
    // Transfer primvars.
    //

    FnKat::GroupBuilder instancerPrimvarsBldr;
    FnKat::GroupBuilder instancesPrimvarsBldr;
    for (int64_t i = 0; i < primvarAttrs.getNumberOfChildren(); ++i)
    {
        const std::string primvarName = primvarAttrs.getChildName(i);

        // Use "point" scope for the instancer.
        instancerPrimvarsBldr.set(primvarName, primvarAttrs.getChildByIndex(i));
        instancerPrimvarsBldr.set(primvarName + ".scope",
                FnKat::StringAttribute("point"));

        // User "primitive" scope for the instances.
        instancesPrimvarsBldr.set(primvarName, primvarAttrs.getChildByIndex(i));
        instancesPrimvarsBldr.set(primvarName + ".scope",
                FnKat::StringAttribute("primitive"));
    }
    instancerAttrMap.set("geometry.arbitrary", instancerPrimvarsBldr.build());
    instancesBldr.setAttrAtLocation("instances",
            "geometry.arbitrary", instancesPrimvarsBldr.build());

    //
    // Set the final aggregate bounds.
    //

    if (aggregateBoundsValid)
    {
        instancerAttrMap.set("bound", FnKat::DoubleAttribute(&aggregateBounds[0], 6, 2));
    }

    //
    // Set proxy attrs.
    //

    instancerAttrMap.set("proxies", PxrUsdKatanaUtils::GetViewerProxyAttr(data));

    //
    // Transfer builder results to our attr maps.
    //

    FnKat::GroupAttribute sourcesAttrs = sourcesBldr.build();
    for (int64_t i = 0; i < sourcesAttrs.getNumberOfChildren(); ++i)
    {
        sourcesAttrMap.set(
                sourcesAttrs.getChildName(i),
                sourcesAttrs.getChildByIndex(i));
    }

    FnKat::GroupAttribute instancesAttrs = instancesBldr.build();
    for (int64_t i = 0; i < instancesAttrs.getNumberOfChildren(); ++i)
    {
        instancesAttrMap.set(
                instancesAttrs.getChildName(i),
                instancesAttrs.getChildByIndex(i));
    }
}
Example #7
0
static FnKat::Attribute
_GetMaterialAssignAttr(
        const UsdPrim& prim,
        const PxrUsdKatanaUsdInPrivateData& data)
{
    if (not prim or prim.GetPath() == SdfPath::AbsoluteRootPath()) {
        // Special-case to pre-empt coding errors.
        return FnKat::Attribute();
    }

    UsdRelationship usdRel = UsdShadeLook::GetBindingRel(prim);
    if (usdRel) {
        // USD shading binding
        SdfPathVector targetPaths;
        usdRel.GetForwardedTargets(&targetPaths);
        if (targetPaths.size() > 0) {
            if (not targetPaths[0].IsPrimPath()) {
                FnLogWarn("Target path " << prim.GetPath().GetString() <<
                          " is not a prim");
                return FnKat::Attribute();
            }

            // This is a copy as it could be modified below.
            SdfPath targetPath = targetPaths[0];
            UsdPrim targetPrim = data.GetUsdInArgs()->GetStage()->GetPrimAtPath(targetPath);
            // If the target is inside a master, then it needs to be re-targeted 
            // to the instance.
            // 
            // XXX remove this special awareness once GetMasterWithContext is
            //     is available as the provided prim will automatically
            //     retarget (or provide enough context to retarget without
            //     tracking manually).
            if (targetPrim and targetPrim.IsInMaster()) {
                if (not data.GetInstancePath().IsEmpty() and 
                        not data.GetMasterPath().IsEmpty()) {

                    // Check if the source and the target of the relationship 
                    // belong to the same master.
                    // If they do, we have the context necessary to do the 
                    // re-mapping.
                    if (data.GetMasterPath().GetCommonPrefix(targetPath).
                            GetPathElementCount() > 0) {
                        targetPath = data.GetInstancePath().AppendPath(
                            targetPath.ReplacePrefix(targetPath.GetPrefixes()[0],
                                SdfPath::ReflexiveRelativePath()));
                    } else {
                        // Warn saying the target of relationship isn't within 
                        // the same master as the source.
                        FnLogWarn("Target path " << prim.GetPath().GetString() 
                            << " isn't within the master " << data.GetMasterPath());
                        return FnKat::Attribute();
                    }
                } else {
                    // XXX
                    // When loading beneath a master via an isolatePath
                    // opArg, we can encounter targets which are within masters
                    // but not within the context of a material.
                    // While that would be an error according to the below
                    // warning, it produces the expected results.
                    // This case can occur when expanding pointinstancers as
                    // the sources are made via execution of PxrUsdIn again
                    // at the sub-trees.
                    
                    
                    // Warn saying target of relationship is in a master, 
                    // but the associated instance path is unknown!
                    // FnLogWarn("Target path " << prim.GetPath().GetString() 
                    //         << " is within a master, but the associated "
                    //         "instancePath is unknown.");
                    // return FnKat::Attribute();
                }
            }

            // Convert the target path to the equivalent katana location.
            // XXX: Looks may have an atypical USD->Katana 
            // path mapping
            std::string location =
                PxrUsdKatanaUtils::ConvertUsdLookPathToKatLocation(targetPath, data);
                
            // XXX Looks containing only display terminals are causing issues
            //     with katana material manipulation workflows.
            //     For now: exclude any material assign which doesn't include
            //     /Looks/ in the path
            if (location.find(UsdKatanaTokens->katanaLooksScopePathSubstring)
                    == std::string::npos)
            {
                return FnKat::Attribute();
            }
                
                
            // location = TfStringReplace(location, "/Looks/", "/Materials/");
            // XXX handle multiple assignments
            return FnKat::StringAttribute(location);
        }
    }

    return FnKat::Attribute();
}