FilamentCamera.h

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// -                        Open3D: www.open3d.org                            -
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// The MIT License (MIT)
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// Copyright (c) 2019 www.open3d.org
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#pragma once

#include "Open3D/Visualization/Rendering/Camera.h"

namespace filament {
class Camera;
class Engine;
}  // namespace filament

namespace open3d {
namespace visualization {

class FilamentCamera : public Camera {
public:
    explicit FilamentCamera(filament::Engine& engine);
    ~FilamentCamera();

    void SetProjection(double fov,
                       double aspect,
                       double near,
                       double far,
                       FovType fov_type) override;

    void SetProjection(Projection projection,
                       double left,
                       double right,
                       double bottom,
                       double top,
                       double near,
                       double far) override;

    double GetNear() const override;
    double GetFar() const override;
    double GetFieldOfView() const override;
    FovType GetFieldOfViewType() const override;

    void SetModelMatrix(const Transform& view) override;
    void SetModelMatrix(const Eigen::Vector3f& forward,
                        const Eigen::Vector3f& left,
                        const Eigen::Vector3f& up) override;

    void LookAt(const Eigen::Vector3f& center,
                const Eigen::Vector3f& eye,
                const Eigen::Vector3f& up) override;

    Eigen::Vector3f GetPosition() const override;
    Eigen::Vector3f GetForwardVector() const override;
    Eigen::Vector3f GetLeftVector() const override;
    Eigen::Vector3f GetUpVector() const override;
    Transform GetModelMatrix() const override;
    Transform GetViewMatrix() const override;
    Transform GetProjectionMatrix() const override;

    filament::Camera* GetNativeCamera() const { return camera_; }

private:
    filament::Camera* camera_ = nullptr;
    filament::Engine& engine_;
    double fov_;
    FovType fov_type_;
};

}  // namespace visualization
}  // namespace open3d