freeCameraSceneDelegate.h

//
// Copyright 2021 Pixar
//
// Licensed under the terms set forth in the LICENSE.txt file available at
// https://openusd.org/license.
//
#ifndef PXR_IMAGING_HDX_FREE_CAMERA_SCENE_DELEGATE_H
#define PXR_IMAGING_HDX_FREE_CAMERA_SCENE_DELEGATE_H
 
#include "pxr/pxr.h"
 
#include "pxr/imaging/hdx/api.h"
 
#include "pxr/imaging/hd/sceneDelegate.h"
#include "pxr/base/gf/camera.h"
#include "pxr/imaging/cameraUtil/conformWindow.h"
 
PXR_NAMESPACE_OPEN_SCOPE
 
class HdxFreeCameraSceneDelegate : public HdSceneDelegate
{
public:
    HDX_API
    HdxFreeCameraSceneDelegate(HdRenderIndex *renderIndex,
                               SdfPath const &delegateId);
    
    HDX_API
    ~HdxFreeCameraSceneDelegate() override;
 
    const SdfPath &GetCameraId() const {
        return _cameraId;
    }
 
    HDX_API
    void SetCamera(const GfCamera &camera);
    HDX_API
    void SetWindowPolicy(CameraUtilConformWindowPolicy policy);
    
    HDX_API
    void SetMatrices(GfMatrix4d const &viewMatrix,
                     GfMatrix4d const &projMatrix);
 
    HDX_API
    void SetClipPlanes(std::vector<GfVec4f> const &clipPlanes);
 
    // HdSceneDelegate interface
    HDX_API
    GfMatrix4d GetTransform(SdfPath const &id) override;
    HDX_API
    VtValue GetCameraParamValue(SdfPath const &id, 
                                TfToken const &key) override;
 
private:
    // Mark camera dirty in render index.
    void _MarkDirty(HdDirtyBits bits);
 
    // Path of camera in render index.
    const SdfPath _cameraId;
 
    // State of camera
    GfCamera _camera;
    // Window policy of camera.
    CameraUtilConformWindowPolicy _policy;
};
 
PXR_NAMESPACE_CLOSE_SCOPE
 
#endif // PXR_IMAGING_HDX_FREE_CAMERA_SCENE_DELEGATE_H