constraintTarget.h

//
// Copyright 2016 Pixar
//
// Licensed under the terms set forth in the LICENSE.txt file available at
// https://openusd.org/license.
//
#ifndef PXR_USD_USD_GEOM_CONSTRAINT_TARGET_H
#define PXR_USD_USD_GEOM_CONSTRAINT_TARGET_H
 
#include "pxr/pxr.h"
#include "pxr/usd/usdGeom/api.h"
#include "pxr/usd/usd/attribute.h"
 
#include <string>
 
PXR_NAMESPACE_OPEN_SCOPE
 
 
class GfMatrix4d;
class UsdGeomXformCache;
 
class UsdGeomConstraintTarget
{
public:
  
    // Default constructor returns an invalid ConstraintTarget.  Exists for 
    // container classes
    UsdGeomConstraintTarget()
    {
        /* NOTHING */
    }
    
    USDGEOM_API
    explicit UsdGeomConstraintTarget(const UsdAttribute &attr);
 
    USDGEOM_API
    static bool IsValid(const UsdAttribute &attr);
 
    // ---------------------------------------------------------------
    // ---------------------------------------------------------------
    
    operator UsdAttribute const& () const { return _attr; }
 
    UsdAttribute const &GetAttr() const { return _attr; }
    
    bool IsDefined() const { return IsValid(_attr); }
 
    
    explicit operator bool() const {
        return IsDefined();
    }
 
    USDGEOM_API
    bool Get(GfMatrix4d* value, UsdTimeCode time = UsdTimeCode::Default()) 
            const;
 
    USDGEOM_API
    bool Set(const GfMatrix4d& value, UsdTimeCode time = UsdTimeCode::Default()) 
            const;
 
    USDGEOM_API
    TfToken GetIdentifier() const;
 
    USDGEOM_API
    void SetIdentifier(const TfToken &identifier);
 
    USDGEOM_API
    static TfToken GetConstraintAttrName(const std::string &constraintName);
 
    USDGEOM_API
    GfMatrix4d ComputeInWorldSpace(UsdTimeCode time=UsdTimeCode::Default(),
                                   UsdGeomXformCache *xfCache=NULL) const;
 
private:
 
    UsdAttribute _attr;
};
 
 
PXR_NAMESPACE_CLOSE_SCOPE
 
#endif // USD_CONSTRAINT_TARGET_H