basisCurvesTopology.h

//
// 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 PXR_IMAGING_HD_BASIS_CURVES_TOPOLOGY_H
#define PXR_IMAGING_HD_BASIS_CURVES_TOPOLOGY_H

#include "pxr/pxr.h"
#include "pxr/imaging/hd/api.h"
#include "pxr/imaging/hd/version.h"
#include "pxr/imaging/hd/topology.h"
#include "pxr/imaging/hd/tokens.h"

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

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

PXR_NAMESPACE_OPEN_SCOPE

class HdBasisCurvesTopology : public HdTopology {
public:

    HD_API
    HdBasisCurvesTopology();
    HD_API
    HdBasisCurvesTopology(const HdBasisCurvesTopology &src);

    HD_API
    HdBasisCurvesTopology(const TfToken &curveType,
                          const TfToken &curveBasis,
                          const TfToken &curveWrap,
                          const VtIntArray &curveVertexCounts,
                          const VtIntArray &curveIndices);
    HD_API
    virtual ~HdBasisCurvesTopology();

    HD_API
    void SetInvisiblePoints(VtIntArray const &invisiblePoints) {
        _invisiblePoints = invisiblePoints;
    }

    HD_API
    VtIntArray const & GetInvisiblePoints() const {
        return _invisiblePoints;
    }

    HD_API
    void SetInvisibleCurves(VtIntArray const &invisibleCurves) {
        _invisibleCurves = invisibleCurves;
    }

    HD_API
    VtIntArray const & GetInvisibleCurves() const {
        return _invisibleCurves;
    }

    VtIntArray const &GetCurveVertexCounts() const {
        return _curveVertexCounts;
    }

    VtIntArray const &GetCurveIndices() const {
        return _curveIndices;
    }

    size_t GetNumCurves() const {
        return _curveVertexCounts.size();
    }

    HD_API
    size_t GetNumPoints() const {
        return _numPoints;
    }

    TfToken GetCurveType() const { return _curveType; }
    TfToken GetCurveBasis() const { return _curveBasis; }
    TfToken GetCurveWrap() const { return _curveWrap; }

    bool HasIndices() const { return !_curveIndices.empty(); }

    HD_API
    virtual ID ComputeHash() const;

    HD_API
    bool operator==(HdBasisCurvesTopology const &other) const;
    HD_API
    bool operator!=(HdBasisCurvesTopology const &other) const;

    HD_API
    size_t CalculateNeededNumberOfControlPoints() const;

    HD_API
    size_t CalculateNeededNumberOfVaryingControlPoints() const;

private:
    TfToken _curveType;
    TfToken _curveBasis;
    TfToken _curveWrap;
    VtIntArray _curveVertexCounts;
    VtIntArray _curveIndices;
    VtIntArray _invisiblePoints;
    VtIntArray _invisibleCurves;
    size_t _numPoints;
};

HD_API
std::ostream& operator << (std::ostream &out, HdBasisCurvesTopology const &topo);


PXR_NAMESPACE_CLOSE_SCOPE

#endif // PXR_IMAGING_HD_BASIS_CURVES_TOPOLOGY_H