//
// Copyright 2019 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_USD_IMAGING_USD_APP_UTILS_CAMERA_H
#define PXR_USD_IMAGING_USD_APP_UTILS_CAMERA_H

/// \file usdAppUtils/camera.h
///
/// Collection of module-scoped utilities for applications that operate using
/// USD cameras.

#include "pxr/pxr.h"
#include "pxr/usdImaging/usdAppUtils/api.h"

#include "pxr/usd/sdf/path.h"
#include "pxr/usd/usd/stage.h"
#include "pxr/usd/usdGeom/camera.h"


PXR_NAMESPACE_OPEN_SCOPE


/// Gets the UsdGeomCamera matching \p cameraPath from the USD stage \p stage.
///
/// If \p cameraPath is an absolute path, this is equivalent to
/// UsdGeomCamera::Get(). Otherwise, if \p cameraPath is a single-element path
/// representing just the name of a camera prim, then \p stage will be searched
/// looking for a UsdGeomCamera matching that name. The UsdGeomCamera schema
/// for that prim will be returned if found, or an invalid UsdGeomCamera will
/// be returned if not.
///
/// Note that if \p cameraPath is a multi-element path, a warning is issued and
/// it is just made absolute using the absolute root path before searching. In
/// the future, this could potentially be changed to use a suffix-based match.
USDAPPUTILS_API
UsdGeomCamera UsdAppUtilsGetCameraAtPath(
        const UsdStagePtr& stage,
        const SdfPath& cameraPath);


PXR_NAMESPACE_CLOSE_SCOPE


#endif