rootNode.h

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//
// Copyright 2025 Pixar
//
// Licensed under the terms set forth in the LICENSE.txt file available at
// https://openusd.org/license.
//
#ifndef PXR_EXEC_VDF_ROOT_NODE_H
#define PXR_EXEC_VDF_ROOT_NODE_H
 
 
#include "pxr/pxr.h"
 
#include "pxr/exec/vdf/api.h"
#include "pxr/exec/vdf/node.h"
 
PXR_NAMESPACE_OPEN_SCOPE
 
class VDF_API_TYPE VdfRootNode : public VdfNode
{
public:
 
    static bool IsARootNode(const VdfNode &node) {
        return node.GetNumInputs() == 0 && node.IsA<VdfRootNode>();
    }
 
protected:
 
    VdfRootNode(
        VdfNetwork *network,
        const VdfOutputSpecs &outputSpecs)
    :   VdfNode(network, VdfInputSpecs(), outputSpecs) {}
 
    VDF_API
    ~VdfRootNode() override;
 
private:
 
    // VdfRootNodes can't be computed.  Therefore this class overrides
    // the Compute() method finally which only produces an error message.
    VDF_API
    void Compute(const VdfContext &context) const override final;
};
 
PXR_NAMESPACE_CLOSE_SCOPE
 
#endif