RotationInteractorLogic.h

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// ----------------------------------------------------------------------------
// -                        Open3D: www.open3d.org                            -
// ----------------------------------------------------------------------------
// Copyright (c) 2018-2023 www.open3d.org
// SPDX-License-Identifier: MIT
// ----------------------------------------------------------------------------
 
#pragma once
 
#include "open3d/visualization/rendering/MatrixInteractorLogic.h"
 
namespace open3d {
namespace visualization {
namespace rendering {
 
class RotationInteractorLogic : public MatrixInteractorLogic {
    using Super = MatrixInteractorLogic;
 
public:
    explicit RotationInteractorLogic(Camera *camera, double min_far_plane);
    ~RotationInteractorLogic();
 
    virtual void SetCenterOfRotation(const Eigen::Vector3f &center);
 
    // Panning is always relative to the camera's left (x) and up (y)
    // axis. Modifies center of rotation and the matrix.
    virtual void Pan(int dx, int dy);
 
    virtual void StartMouseDrag();
    virtual void UpdateMouseDragUI();
    virtual void EndMouseDrag();
 
protected:
    double min_far_plane_;
    Camera *camera_;
 
    Eigen::Vector3f CalcPanVectorWorld(int dx, int dy);
    void UpdateCameraFarPlane();
};
 
}  // namespace rendering
}  // namespace visualization
}  // namespace open3d