treadmill-experiment-state.hpp

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/*
 * Copyright (C) 2023  Christopher J. Howard
 *
 * This file is part of Antkeeper source code.
 *
 * Antkeeper source code is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Antkeeper source code is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Antkeeper source code.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef ANTKEEPER_TREADMILL_EXPERIMENT_STATE_HPP
#define ANTKEEPER_TREADMILL_EXPERIMENT_STATE_HPP
 
#include "game/states/game-state.hpp"
#include <engine/entity/id.hpp>
#include <engine/math/vector.hpp>
#include <engine/render/model.hpp>
#include <engine/event/subscription.hpp>
#include <engine/input/mouse-events.hpp>
#include <engine/geom/primitives/ray.hpp>
#include <engine/geom/primitives/plane.hpp>
#include <engine/math/angles.hpp>
#include <engine/scene/light-probe.hpp>
#include <engine/scene/rectangle-light.hpp>
#include <engine/geom/bvh/bvh.hpp>
#include <engine/geom/brep/brep-mesh.hpp>
#include <engine/animation/ik/ik-rig.hpp>
#include "game/ant/ant-phenome.hpp"
 
class treadmill_experiment_state: public game_state
{
public:
    explicit treadmill_experiment_state(::game& ctx);
    ~treadmill_experiment_state() override;
    
private:
    void create_third_person_camera_rig();
    void destroy_third_person_camera_rig();
    
    void set_third_person_camera_zoom(double zoom);
    void set_third_person_camera_rotation(double yaw, double pitch);
    
    void zoom_third_person_camera(double zoom);
    void translate_third_person_camera(const math::dvec3& direction, double magnitude);
    void rotate_third_person_camera(const input::mouse_moved_event& event);
    
    void handle_mouse_motion(const input::mouse_moved_event& event);
    
    void update_third_person_camera();
    void load_camera_preset(std::uint8_t index);
    void save_camera_preset(std::uint8_t index);
    void load_or_save_camera_preset(std::uint8_t index);
    
    [[nodiscard]] geom::ray<float, 3> get_mouse_ray(const math::vec2<std::int32_t>& mouse_position) const;
    
    void setup_controls();
    
    std::vector<std::shared_ptr<::event::subscription>> action_subscriptions;
    std::shared_ptr<::event::subscription> mouse_motion_subscription;
    
    bool mouse_look{false};
    bool mouse_grip{false};
    bool mouse_zoom{false};
    geom::plane<float> mouse_grip_plane{{0.0, 1.0, 0.0}, 0.0};
    math::fvec3 mouse_grip_point{};
    
    bool moving{false};
    
    entity::id third_person_camera_rig_eid{entt::null};
    double third_person_camera_yaw{0.0};
    double third_person_camera_pitch{math::radians(45.0)};
    math::dvec3 third_person_camera_focal_point{0.0, 0.0, 0.0};
    double third_person_camera_zoom{0.25};
    std::uint32_t third_person_camera_zoom_step_count{6};
    
    double third_person_camera_near_focal_plane_height{1.0f};
    double third_person_camera_far_focal_plane_height{50.0f};
    
    double third_person_camera_near_hfov{math::radians(90.0)};
    double third_person_camera_far_hfov{math::radians(45.0)};
    
    double third_person_camera_speed{1.0f};
    
    double third_person_camera_hfov{};
    double third_person_camera_vfov{};
    double third_person_camera_focal_plane_width{};
    double third_person_camera_focal_plane_height{};
    double third_person_camera_focal_distance{};
    math::dquat third_person_camera_yaw_rotation{math::dquat::identity()};
    math::dquat third_person_camera_pitch_rotation{math::dquat::identity()};
    math::dquat third_person_camera_orientation{math::dquat::identity()};
    
    struct camera_preset
    {
        double yaw{};
        double pitch{};
        math::dvec3 focal_point{};
        double zoom{0.25};
    };
    
    std::vector<std::optional<camera_preset>> camera_presets{10};
    
    std::shared_ptr<render::matvar_fvec3> light_rectangle_emissive;
    std::shared_ptr<scene::light_probe> light_probe;
    
    entity::id larva_eid;
    entity::id worker_eid;
    
    std::shared_ptr<ant_phenome> worker_phenome;
    std::shared_ptr<ik_rig> worker_ik_rig;
    
    std::shared_ptr<scene::light_probe> sky_probe;
    std::shared_ptr<scene::rectangle_light> area_light;
};
 
#endif // ANTKEEPER_TREADMILL_EXPERIMENT_STATE_HPP