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//
// Copyright 2019 Pixar
//
// Licensed under the Apache License, Version 2.0 (the "Apache License")
// with the following modification; you may not use this file except in
// compliance with the Apache License and the following modification to it:
// Section 6. Trademarks. is deleted and replaced with:
//
// 6. Trademarks. This License does not grant permission to use the trade
// names, trademarks, service marks, or product names of the Licensor
// and its affiliates, except as required to comply with Section 4(c) of
// the License and to reproduce the content of the NOTICE file.
//
// You may obtain a copy of the Apache License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the Apache License with the above modification is
// distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the Apache License for the specific
// language governing permissions and limitations under the Apache License.
//
#include "hdPrman/matfiltConversions.h"
#include "pxr/base/tf/stl.h"
#include <unordered_set>
#include "pxr/imaging/hd/perfLog.h"
PXR_NAMESPACE_OPEN_SCOPE
bool
MatfiltConvertFromHdMaterialNetworkMap(
const HdMaterialNetworkMap & hdNetworkMap,
MatfiltNetwork *result)
{
HD_TRACE_FUNCTION();
for (auto const& iter: hdNetworkMap.map) {
const TfToken & terminalName = iter.first;
const HdMaterialNetwork & hdNetwork = iter.second;
if (hdNetwork.nodes.empty()) {
continue;
}
// Transfer over individual nodes.
// Note that the same nodes may be shared by multiple terminals.
// We simply overwrite them here.
for (const HdMaterialNode & node : hdNetwork.nodes) {
MatfiltNode & matfiltNode = result->nodes[node.path];
matfiltNode.nodeTypeId = node.identifier;
matfiltNode.parameters = node.parameters;
}
// Assume that the last entry is the terminal (as that's not
// specified in HdMaterialNetworkMap/HdMaterialNetwork).
result->terminals[terminalName].upstreamNode =
hdNetwork.nodes.back().path;
// Transfer over relationships to inputConnections on
// receiving/downstream nodes.
for (const HdMaterialRelationship & rel : hdNetwork.relationships) {
// outputId (in hdMaterial terms) is the input of the receiving node
auto iter = result->nodes.find(rel.outputId);
// skip connection if the destination node doesn't exist
if (iter == result->nodes.end()) {
continue;
}
std::vector<MatfiltConnection> &conns =
iter->second.inputConnections[rel.outputName];
MatfiltConnection conn = {rel.inputId, rel.inputName};
// skip connection if it already exists (it may be shared
// between surface and displacement)
if (std::find(conns.begin(), conns.end(), conn) == conns.end()) {
conns.emplace_back(conn);
}
}
}
return true;
}
PXR_NAMESPACE_CLOSE_SCOPE