//
//   Copyright 2013 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 OSD_EVAL_LIMIT_CONTEXT_H
#define OSD_EVAL_LIMIT_CONTEXT_H

#include "../version.h"

#include "../far/mesh.h"

#include "../osd/nonCopyable.h"
#include "../osd/vertex.h"

namespace OpenSubdiv {
namespace OPENSUBDIV_VERSION {


/// \brief Coordinates set on a limit surface
///
class OsdEvalCoords {

public:

    OsdEvalCoords() { }

    /// \brief Constructor
    ///
    /// @param f Ptex face id
    ///
    /// @param x parametric location on face
    ///
    /// @param y parametric location on face
    ///
    OsdEvalCoords(int f, float x, float y) : face(f), u(x), v(y) { }
    
    unsigned int face; //  Ptex face ID
    float u,v;         // local face (u,v)
};


/// \brief LimitEval Context
///
/// A stub class to derive LimitEval context classes.
///
class OsdEvalLimitContext : OsdNonCopyable<OsdEvalLimitContext> {

public:
    /// \brief Destructor.
    virtual ~OsdEvalLimitContext();

protected:
    explicit OsdEvalLimitContext(FarMesh<OsdVertex> const * farmesh);

private:
    bool _adaptive;
};

} // end namespace OPENSUBDIV_VERSION
using namespace OPENSUBDIV_VERSION;

} // end namespace OpenSubdiv

#endif /* OSD_EVAL_LIMIT_CONTEXT_H */
