main-menu-state.cpp

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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/>.
 */
 
#include "game/states/main-menu-state.hpp"
#include <engine/animation/animation.hpp>
#include <engine/animation/animator.hpp>
#include <engine/animation/ease.hpp>
#include <engine/animation/screen-transition.hpp>
#include <engine/config.hpp>
#include "game/components/steering-component.hpp"
#include "game/components/transform-component.hpp"
#include "game/controls.hpp"
#include "game/ecoregion.hpp"
#include "game/menu.hpp"
#include "game/states/collection-menu-state.hpp"
#include "game/states/extras-menu-state.hpp"
#include "game/states/nuptial-flight-state.hpp"
#include "game/states/nest-selection-state.hpp"
#include "game/states/nest-view-state.hpp"
#include "game/states/options-menu-state.hpp"
#include "game/states/experiments/treadmill-experiment-state.hpp"
#include "game/strings.hpp"
#include "game/world.hpp"
#include <engine/math/vector.hpp>
#include <engine/math/projection.hpp>
#include <engine/physics/light/exposure.hpp>
#include <engine/render/model.hpp>
#include <engine/render/passes/sky-pass.hpp>
#include <engine/resources/resource-manager.hpp>
#include <engine/utility/hash/fnv1a.hpp>
#include <format>
#include <limits>
 
main_menu_state::main_menu_state(::game& ctx, bool fade_in):
    game_state(ctx)
{
    debug::log_trace("Entering main menu state...");
    
    const math::fvec2 viewport_size = math::fvec2(ctx.window->get_viewport_size());
    const math::fvec2 viewport_center = viewport_size * 0.5f;
    
    // Construct title text
    title_text = std::make_unique<scene::text>();
    title_text->set_material(ctx.title_font_material);
    title_text->set_color({1.0f, 1.0f, 1.0f, (fade_in) ? 1.0f : 0.0f});
    title_text->set_font(&ctx.title_font);
    title_text->set_content(get_string(ctx, "title_antkeeper"));
    const auto& title_aabb = title_text->get_bounds();
    float title_w = title_aabb.max.x() - title_aabb.min.x();
    float title_h = title_aabb.max.y() - title_aabb.min.y();
    title_text->set_translation({std::round(viewport_center.x() - title_w * 0.5f), std::round(viewport_center.y() - title_h * 0.5f + (viewport_size.y() / 3.0f) / 2.0f), 0.0f});
    
    // Add text to UI
    ctx.ui_scene->add_object(*title_text);
    
    // Construct title fade animation
    title_fade_animation.set_interpolator(ease<float>::out_cubic);
    animation_channel<float>* opacity_channel = title_fade_animation.add_channel(0);
    title_fade_animation.set_frame_callback
    (
        [this, &ctx](int channel, const float& opacity)
        {
            math::fvec4 color = this->title_text->get_color();
            color[3] = opacity;
            this->title_text->set_color(color);
        }
    );
    ctx.animator->add_animation(&title_fade_animation);
    
    // Construct menu item texts
    start_text = std::make_unique<scene::text>();
    options_text = std::make_unique<scene::text>();
    extras_text = std::make_unique<scene::text>();
    quit_text = std::make_unique<scene::text>();
    
    // Build list of menu item texts
    ctx.menu_item_texts.push_back({start_text.get(), nullptr});
    ctx.menu_item_texts.push_back({options_text.get(), nullptr});
    ctx.menu_item_texts.push_back({extras_text.get(), nullptr});
    ctx.menu_item_texts.push_back({quit_text.get(), nullptr});
    
    // Set content of menu item texts
    start_text->set_content(get_string(ctx, "main_menu_start"));
    options_text->set_content(get_string(ctx, "main_menu_options"));
    extras_text->set_content(get_string(ctx, "main_menu_extras"));
    quit_text->set_content(get_string(ctx, "main_menu_quit"));
    
    // Init menu item index
    ::menu::init_menu_item_index(ctx, "main");
    
    ::menu::update_text_color(ctx);
    ::menu::update_text_font(ctx);
    ::menu::align_text(ctx, true, false, (-viewport_size.y() / 3.0f) / 2.0f);
    ::menu::add_text_to_ui(ctx);
    ::menu::setup_animations(ctx);
    
    auto select_start_callback = [this, &ctx]()
    {
        // Disable menu controls
        ctx.function_queue.push(std::bind(::disable_menu_controls, std::ref(ctx)));
        
        // Create change state function
        auto change_state = [&ctx]()
        {
            // Queue change to nuptial state
            ctx.function_queue.push
            (
                [&ctx]()
                {
                    ctx.state_machine.pop();
                    // ctx.state_machine.emplace(std::make_unique<nuptial_flight_state>(ctx));
                    // ctx.state_machine.emplace(std::make_unique<collection_menu_state>(ctx));
                    // ctx.state_machine.emplace(std::make_unique<nest_selection_state>(ctx));
                    // ctx.state_machine.emplace(std::make_unique<nest_view_state>(ctx));
                    ctx.state_machine.emplace(std::make_unique<treadmill_experiment_state>(ctx));
                }
            );
        };
        
        // Fade out title
        this->fade_out_title();
        
        // Fade out menu
        ::menu::fade_out(ctx, nullptr);
        
        // Start fade out to white
        //ctx.fade_transition_color->set_value({1, 1, 1});
        ctx.fade_transition_color->set({0, 0, 0});
        ctx.fade_transition->transition(config::new_colony_fade_out_duration, false, ease<float>::out_cubic, false, change_state);
    };
    auto select_options_callback = [this, &ctx]()
    {
        // Disable menu controls
        ctx.function_queue.push(std::bind(::disable_menu_controls, std::ref(ctx)));
        
        // Fade out title
        this->fade_out_title();
        
        // Fade out menu
        ::menu::fade_out
        (
            ctx,
            [&ctx]()
            {
                // Queue change to options menu state
                ctx.function_queue.push
                (
                    [&ctx]()
                    {
                        ctx.state_machine.pop();
                        ctx.state_machine.emplace(std::make_unique<options_menu_state>(ctx));
                    }
                );
            }
        );
    };
    auto select_extras_callback = [this, &ctx]()
    {
        // Disable menu controls
        ctx.function_queue.push(std::bind(::disable_menu_controls, std::ref(ctx)));
        
        // Fade out title
        this->fade_out_title();
        
        // Fade out menu
        ::menu::fade_out
        (
            ctx,
            [&ctx]()
            {
                // Queue change to extras menu state
                ctx.function_queue.push
                (
                    [&ctx]()
                    {
                        ctx.state_machine.pop();
                        ctx.state_machine.emplace(std::make_unique<extras_menu_state>(ctx));
                    }
                );
            }
        );
    };
    auto select_quit_callback = [this, &ctx]()
    {
        // Disable menu controls
        ctx.function_queue.push(std::bind(::disable_menu_controls, std::ref(ctx)));
        
        // Fade out title
        this->fade_out_title();
        
        // Fade out menu
        ::menu::fade_out(ctx, nullptr);
        
        // Fade to black then quit
        ctx.fade_transition->transition(config::quit_fade_out_duration, false, ease<float>::out_cubic, false, [&ctx](){ctx.closed=true;});
        
        // Quit immediately
        //ctx.function_queue.push([&ctx](){ctx.closed=true;});
    };
    
    // Build list of menu select callbacks
    ctx.menu_select_callbacks.push_back(select_start_callback);
    ctx.menu_select_callbacks.push_back(select_options_callback);
    ctx.menu_select_callbacks.push_back(select_extras_callback);
    ctx.menu_select_callbacks.push_back(select_quit_callback);
    
    // Build list of menu left callbacks
    ctx.menu_left_callbacks.push_back(nullptr);
    ctx.menu_left_callbacks.push_back(nullptr);
    ctx.menu_left_callbacks.push_back(nullptr);
    ctx.menu_left_callbacks.push_back(nullptr);
    
    // Build list of menu right callbacks
    ctx.menu_right_callbacks.push_back(nullptr);
    ctx.menu_right_callbacks.push_back(nullptr);
    ctx.menu_right_callbacks.push_back(nullptr);
    ctx.menu_right_callbacks.push_back(nullptr);
    
    // Set menu back callback
    ctx.menu_back_callback = select_quit_callback;
    
    if (fade_in)
    {
        // Fade in from black
        ctx.fade_transition->transition(config::title_fade_in_duration, true, ease<float>::out_cubic);
    }
    else
    {
        // Fade in text
        fade_in_title();
        ::menu::fade_in(ctx, nullptr);
    }
    
    if (ctx.entities.find("earth") == ctx.entities.end())
    {
        ::world::cosmogenesis(ctx);
        ::world::create_observer(ctx);
        //::world::enter_ecoregion(ctx, *ctx.resource_manager->load<::ecoregion>("seedy-scrub.eco"));
    }
    
    // Set world time
    ::world::set_time(ctx, 2022, 6, 21, 12, 0, 0.0);
    
    // Set world time scale
    ::world::set_time_scale(ctx, 0.0);
    
    const float ev100_sunny16 = physics::light::ev::from_settings(16.0f, 1.0f / 100.0f, 100.0f);
    ctx.surface_camera->set_exposure_value(ev100_sunny16);
    
    
    // Setup and enable sky and ground passes
    ctx.sky_pass->set_enabled(true);
    
    // Setup window resized callback
    window_resized_subscription = ctx.window->get_resized_channel().subscribe
    (
        [&](const auto& event)
        {
            const math::fvec2 viewport_size = math::fvec2(event.window->get_viewport_size());
            const math::fvec2 viewport_center = viewport_size * 0.5f;
            
            // Re-align title text
            const auto& title_aabb = title_text->get_bounds();
            float title_w = title_aabb.max.x() - title_aabb.min.x();
            float title_h = title_aabb.max.y() - title_aabb.min.y();
            title_text->set_translation({std::round(viewport_center.x() - title_w * 0.5f), std::round(viewport_center.y() - title_h * 0.5f + (viewport_size.y() / 3.0f) / 2.0f), 0.0f});
            
            ::menu::align_text(ctx, true, false, (-viewport_size.y() / 3.0f) / 2.0f);
        }
    );
    
    // Enable menu controls
    ctx.function_queue.push(std::bind(::enable_menu_controls, std::ref(ctx)));
    
    debug::log_trace("Entered main menu state");
}
 
main_menu_state::~main_menu_state()
{
    debug::log_trace("Exiting main menu state...");
    
    // Destruct menu
    ::disable_menu_controls(ctx);
    ::menu::clear_callbacks(ctx);
    ::menu::delete_animations(ctx);
    ::menu::remove_text_from_ui(ctx);
    ::menu::delete_text(ctx);
    
    // Hide menu BG
    //ctx.menu_bg_billboard->set_active(false);
    
    // Destruct title animation
    ctx.animator->remove_animation(&title_fade_animation);
    
    // Destruct text
    ctx.ui_scene->remove_object(*title_text);
    
    debug::log_trace("Exited main menu state");
}
 
void main_menu_state::fade_in_title()
{
    animation_channel<float>* opacity_channel = title_fade_animation.get_channel(0);
    opacity_channel->remove_keyframes();
    opacity_channel->insert_keyframe({0.0f, 0.0f});
    opacity_channel->insert_keyframe({config::menu_fade_in_duration, 1.0f});
    title_fade_animation.stop();
    title_fade_animation.play();
}
 
void main_menu_state::fade_out_title()
{
    animation_channel<float>* opacity_channel = title_fade_animation.get_channel(0);
    opacity_channel->remove_keyframes();
    opacity_channel->insert_keyframe({0.0f, 1.0f});
    opacity_channel->insert_keyframe({config::menu_fade_out_duration, 0.0f});
    title_fade_animation.stop();
    title_fade_animation.play();
}