materialAPI.h

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//
// Copyright 2016 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.
//
#ifndef USDRI_GENERATED_MATERIALAPI_H
#define USDRI_GENERATED_MATERIALAPI_H


#include "pxr/pxr.h"
#include "pxr/usd/usdRi/api.h"
#include "pxr/usd/usd/apiSchemaBase.h"
#include "pxr/usd/usd/prim.h"
#include "pxr/usd/usd/stage.h"
#include "pxr/usd/usdRi/tokens.h"

#include "pxr/usd/usdShade/input.h"
#include "pxr/usd/usdShade/output.h"
#include "pxr/usd/usdShade/material.h"


#include "pxr/base/vt/value.h"

#include "pxr/base/gf/vec3d.h"
#include "pxr/base/gf/vec3f.h"
#include "pxr/base/gf/matrix4d.h"

#include "pxr/base/tf/token.h"
#include "pxr/base/tf/type.h"

PXR_NAMESPACE_OPEN_SCOPE

class SdfAssetPath;

// -------------------------------------------------------------------------- //
// RIMATERIALAPI                                                              //
// -------------------------------------------------------------------------- //

class UsdRiMaterialAPI : public UsdAPISchemaBase
{
public:
    static const UsdSchemaKind schemaKind = UsdSchemaKind::SingleApplyAPI;

    explicit UsdRiMaterialAPI(const UsdPrim& prim=UsdPrim())
        : UsdAPISchemaBase(prim)
    {
    }

    explicit UsdRiMaterialAPI(const UsdSchemaBase& schemaObj)
        : UsdAPISchemaBase(schemaObj)
    {
    }

    USDRI_API
    virtual ~UsdRiMaterialAPI();

    USDRI_API
    static const TfTokenVector &
    GetSchemaAttributeNames(bool includeInherited=true);

    USDRI_API
    static UsdRiMaterialAPI
    Get(const UsdStagePtr &stage, const SdfPath &path);


    USDRI_API
    static bool 
    CanApply(const UsdPrim &prim, std::string *whyNot=nullptr);

    USDRI_API
    static UsdRiMaterialAPI 
    Apply(const UsdPrim &prim);

protected:
    USDRI_API
    UsdSchemaKind _GetSchemaKind() const override;

private:
    // needs to invoke _GetStaticTfType.
    friend class UsdSchemaRegistry;
    USDRI_API
    static const TfType &_GetStaticTfType();

    static bool _IsTypedSchema();

    // override SchemaBase virtuals.
    USDRI_API
    const TfType &_GetTfType() const override;

public:
    // --------------------------------------------------------------------- //
    // SURFACE 
    // --------------------------------------------------------------------- //
    USDRI_API
    UsdAttribute GetSurfaceAttr() const;

    USDRI_API
    UsdAttribute CreateSurfaceAttr(VtValue const &defaultValue = VtValue(), bool writeSparsely=false) const;

public:
    // --------------------------------------------------------------------- //
    // DISPLACEMENT 
    // --------------------------------------------------------------------- //
    USDRI_API
    UsdAttribute GetDisplacementAttr() const;

    USDRI_API
    UsdAttribute CreateDisplacementAttr(VtValue const &defaultValue = VtValue(), bool writeSparsely=false) const;

public:
    // --------------------------------------------------------------------- //
    // VOLUME 
    // --------------------------------------------------------------------- //
    USDRI_API
    UsdAttribute GetVolumeAttr() const;

    USDRI_API
    UsdAttribute CreateVolumeAttr(VtValue const &defaultValue = VtValue(), bool writeSparsely=false) const;

public:
    // ===================================================================== //
    // Feel free to add custom code below this line, it will be preserved by 
    // the code generator. 
    //
    // Just remember to: 
    //  - Close the class declaration with }; 
    //  - Close the namespace with PXR_NAMESPACE_CLOSE_SCOPE
    //  - Close the include guard with #endif
    // ===================================================================== //
    // --(BEGIN CUSTOM CODE)--

    explicit UsdRiMaterialAPI(const UsdShadeMaterial& material)
        : UsdRiMaterialAPI(material.GetPrim())
    {
    }

    // --------------------------------------------------------------------- //
    // --------------------------------------------------------------------- //
        
    USDRI_API
    UsdShadeOutput GetSurfaceOutput() const;

    USDRI_API
    UsdShadeOutput GetDisplacementOutput() const;

    USDRI_API
    UsdShadeOutput GetVolumeOutput() const;


    // --------------------------------------------------------------------- //
    // --------------------------------------------------------------------- //
        
    USDRI_API
    bool SetSurfaceSource(const SdfPath &surfacePath) const;
    
    USDRI_API
    bool SetDisplacementSource(const SdfPath &displacementPath) const;

    USDRI_API
    bool SetVolumeSource(const SdfPath &volumePath) const;


    // --------------------------------------------------------------------- //
    // --------------------------------------------------------------------- //
        
    USDRI_API
    UsdShadeShader GetSurface(bool ignoreBaseMaterial=false) const;

    USDRI_API
    UsdShadeShader GetDisplacement(bool ignoreBaseMaterial=false) const;

    USDRI_API
    UsdShadeShader GetVolume(bool ignoreBaseMaterial=false) const;



    USDRI_API
    UsdShadeNodeGraph::InterfaceInputConsumersMap
    ComputeInterfaceInputConsumersMap(
            bool computeTransitiveConsumers=false) const;


private:
    UsdShadeShader _GetSourceShaderObject(const UsdShadeOutput &output,
                                          bool ignoreBaseMaterial) const;

    // Helper method to get the deprecated 'bxdf' output.
    UsdShadeOutput _GetBxdfOutput(const UsdPrim &materialPrim) const;
};

PXR_NAMESPACE_CLOSE_SCOPE

#endif