Program Listing for File WebSceneCamera.h

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/**
 * @file
 * @brief Contains the WebSceneCamera class.
 */

#pragma once
#include "Karana/Scene/GraphicalSceneCamera.h"
#include "Karana/Scene/Layer.h"
#include "Karana/Scene/Projection.h"
#include "Karana/WebScene/WebSceneNode.h"

namespace Karana::Scene {
    /**
     * @class WebSceneCamera
     * @brief Specialized node to provide a viewpoint for the WebScene
     *
     * See \sref{scene_layer_sec} for more discussion on
     * the scene layer.
     */
    class WebSceneCamera : public WebSceneNode, public GraphicalSceneCamera {
      public:
        /**
         * @brief WebSceneCamera constructor. The constructor is not meant to be called directly.
         *        Please use the create(...) method instead to create an instance.
         * @param name - Name for the WebSceneCamera
         * @param scene - WebScene to add the camera to.
         * @param server - Server to communicate with frontends
         * @param proj - Camera projection parameters.
         */
        WebSceneCamera(std::string_view name,
                       const kc::ks_ptr<Scene> &scene,
                       const Karana::Core::ks_ptr<Karana::WebUI::Server> &server,
                       const VarProjection &proj = PerspectiveProjection{});

        /**
         * @brief Set the camera projection parameters
         * @param proj The camera projection parameters
         */
        void setProjection(const VarProjection &proj) override;

        /**
         * @brief Set the bitmask for which layers should be visible.
         * @param mask - The layers bitmask
         */
        void setMask(layer_t mask) override;

        /**
         * @brief Set the pose of the camera.
         * @param offset The position of the camera.
         * @param target The position the camera will point at.
         * @param up The up vector of the camera.
         */
        void pointCameraAt(const Karana::Math::Vec3 &offset,
                           const Karana::Math::Vec3 &target,
                           const Karana::Math::Vec3 &up) override;

      private:
        friend class WebScene;
        void _ioHandleConn(Karana::WebUI::Connection &conn) const override;

        void _ioSendCreateSceneCameraMsg(
            const std::function<void(const uint8_t *data, size_t len)> &send,
            const PerspectiveProjection &proj) const;
        void _ioSendCreateSceneCameraMsg(
            const std::function<void(const uint8_t *data, size_t len)> &send,
            const OrthographicProjection &proj) const;
        void
        _ioSendSetProjectionMsg(const std::function<void(const uint8_t *data, size_t len)> &send,
                                const PerspectiveProjection &proj) const;
        void
        _ioSendSetProjectionMsg(const std::function<void(const uint8_t *data, size_t len)> &send,
                                const OrthographicProjection &proj) const;
        void
        _ioSendSetCameraMaskMsg(const std::function<void(const uint8_t *data, size_t len)> &send,
                                layer_t mask) const;
        void
        _ioSendPointCameraAtMsg(const std::function<void(const uint8_t *data, size_t len)> &send,
                                const Karana::Math::Vec3 &,
                                const Karana::Math::Vec3 &,
                                const Karana::Math::Vec3 &) const;

        VarProjection _io_projection;

        Karana::Math::Vec3 _io_offset = {0, 0, 5};
        Karana::Math::Vec3 _io_target = {0, 0, 0};
        Karana::Math::Vec3 _io_up = {0, 1, 0};

        layer_t _io_mask = LAYER_GRAPHICS;
    };
} // namespace Karana::Scene