| 106 | { |
| 107 | |
| 108 | const pxr::HdMaterialNode2* GetTerminalNode(const pxr::HdMaterialNetwork2& Network, |
| 109 | const pxr::TfToken& TerminalToken, |
| 110 | pxr::SdfPath& TerminalPath) |
| 111 | { |
| 112 | // Find the node that is upstream of the terminal, e.g. |
| 113 | // the node that is connected to the terminal's input. |
| 114 | const auto terminal_it = Network.terminals.find(TerminalToken); |
| 115 | if (terminal_it == Network.terminals.end()) |
| 116 | return nullptr; |
| 117 | |
| 118 | // |
| 119 | // upstreamNode |
| 120 | // A |
| 121 | // | |
| 122 | // | HdMaterialConnection2 |
| 123 | // | |
| 124 | // Terminal |
| 125 | // |
| 126 | const pxr::HdMaterialConnection2& TerminalConnection = terminal_it->second; |
| 127 | |
| 128 | const auto node_it = Network.nodes.find(TerminalConnection.upstreamNode); |
| 129 | if (node_it == Network.nodes.end()) |
| 130 | { |
| 131 | LOG_ERROR_MESSAGE("Unable to find upstream node ", TerminalConnection.upstreamNode, " of terminal ", TerminalToken); |
| 132 | return nullptr; |
| 133 | } |
| 134 | |
| 135 | TerminalPath = TerminalConnection.upstreamNode; |
| 136 | return &node_it->second; |
| 137 | } |
| 138 | |
| 139 | #if 0 |
| 140 | std::shared_ptr<pxr::HioGlslfx> GetGlslfxForTerminal(const pxr::TfToken& NodeTypeId) |