basisCurvesTopology.h

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