sphereAdapter.h

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//
// Copyright 2016 Pixar
//
// Licensed under the terms set forth in the LICENSE.txt file available at
// https://openusd.org/license.
//
#ifndef PXR_USD_IMAGING_USD_IMAGING_SPHERE_ADAPTER_H
#define PXR_USD_IMAGING_USD_IMAGING_SPHERE_ADAPTER_H

/// \file usdImaging/sphereAdapter.h

#include "pxr/pxr.h"
#include "pxr/usdImaging/usdImaging/api.h"
#include "pxr/usdImaging/usdImaging/primAdapter.h"
#include "pxr/usdImaging/usdImaging/gprimAdapter.h"

PXR_NAMESPACE_OPEN_SCOPE


class UsdGeomSphere;

/// \class UsdImagingSphereAdapter
///
/// Delegate support for UsdGeomSphere.
///
class UsdImagingSphereAdapter : public UsdImagingGprimAdapter
{
public:
    using BaseAdapter = UsdImagingGprimAdapter;

    // Number of radial segments about the Z axis.
    static constexpr size_t numRadial = 10;
    // Number of divisions along the Z axis.
    static constexpr size_t numAxial  = 10;

    UsdImagingSphereAdapter()
        : UsdImagingGprimAdapter()
    {}
    USDIMAGING_API
    ~UsdImagingSphereAdapter() override;

    // ---------------------------------------------------------------------- //
    /// \name Scene Index Support
    // ---------------------------------------------------------------------- //

    USDIMAGING_API
    TfTokenVector GetImagingSubprims(UsdPrim const& prim) override;

    USDIMAGING_API
    TfToken GetImagingSubprimType(
            UsdPrim const& prim,
            TfToken const& subprim) override;

    USDIMAGING_API
    HdContainerDataSourceHandle GetImagingSubprimData(
            UsdPrim const& prim,
            TfToken const& subprim,
            const UsdImagingDataSourceStageGlobals &stageGlobals) override;

    USDIMAGING_API
    HdDataSourceLocatorSet InvalidateImagingSubprim(
            UsdPrim const& prim,
            TfToken const& subprim,
            TfTokenVector const& properties,
            UsdImagingPropertyInvalidationType invalidationType) override;

    // ---------------------------------------------------------------------- //
    /// \name Initialization
    // ---------------------------------------------------------------------- //

    USDIMAGING_API
    SdfPath Populate(
        UsdPrim const& prim,
        UsdImagingIndexProxy* index,
        UsdImagingInstancerContext const* instancerContext = nullptr) 
            override;

    USDIMAGING_API
    bool IsSupported(UsdImagingIndexProxy const* index) const override;

    USDIMAGING_API
    HdDirtyBits ProcessPropertyChange(UsdPrim const& prim,
                                      SdfPath const& cachePath,
                                      TfToken const& propertyName) override;

    // ---------------------------------------------------------------------- //
    /// \name Parallel Setup and Resolve
    // ---------------------------------------------------------------------- //
    /// Thread Safe.
    USDIMAGING_API
    void TrackVariability(
        UsdPrim const& prim,
        SdfPath const& cachePath,
        HdDirtyBits* timeVaryingBits,
        UsdImagingInstancerContext const* instancerContext = nullptr) 
            const override;

    // ---------------------------------------------------------------------- //
    /// \name Data access
    // ---------------------------------------------------------------------- //

    USDIMAGING_API
    VtValue GetTopology(UsdPrim const& prim,
                        SdfPath const& cachePath,
                        UsdTimeCode time) const override;

    // Override the implemetation in GprimAdapter since we don't fetch the
    // points attribute for implicit primitives.
    USDIMAGING_API
    VtValue GetPoints(
        UsdPrim const& prim,
        UsdTimeCode time) const override;
};


PXR_NAMESPACE_CLOSE_SCOPE

#endif // PXR_USD_IMAGING_USD_IMAGING_SPHERE_ADAPTER_H