From 4e53a20169143f4987f9de5a78a17e5593640266 Mon Sep 17 00:00:00 2001
From: "C. J. Howard" <cjhoward@cjhoward.org>
Date: Sat, 18 Jun 2022 13:16:16 +0800
Subject: [PATCH] Add extras menu. Add menu transition animations

---
 CMakeLists.txt                           |   1 -
 src/game/context.hpp                     |   2 +
 src/game/menu.cpp                        |  84 +++++++++++++-
 src/game/menu.hpp                        |  11 ++
 src/game/states/controls-menu.cpp        |  65 ++++++++---
 src/game/states/credits.cpp              |   8 +-
 src/game/states/extras-menu.cpp          | 137 +++++++++++++++++++++++
 src/game/states/extras-menu.hpp          |  39 +++++++
 src/game/states/gamepad-config-menu.cpp  |  25 ++++-
 src/game/states/graphics-menu.cpp        |  25 ++++-
 src/game/states/keyboard-config-menu.cpp |  25 ++++-
 src/game/states/language-menu.cpp        |  25 ++++-
 src/game/states/loading.cpp              |   2 +-
 src/game/states/main-menu.cpp            | 126 +++++++++++++++++----
 src/game/states/main-menu.hpp            |   2 +-
 src/game/states/options-menu.cpp         | 109 +++++++++++++-----
 src/game/states/sound-menu.cpp           |  26 ++++-
 src/game/states/splash.cpp               |   8 +-
 18 files changed, 621 insertions(+), 99 deletions(-)
 create mode 100644 src/game/states/extras-menu.cpp
 create mode 100644 src/game/states/extras-menu.hpp

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d3614e6..7f0f857 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,5 @@
 cmake_minimum_required(VERSION 3.7)
 
-
 option(VERSION_STRING "Project version string" "0.0.0")
 
 project(antkeeper VERSION ${VERSION_STRING} LANGUAGES CXX)
diff --git a/src/game/context.hpp b/src/game/context.hpp
index d5513f3..cea8bac 100644
--- a/src/game/context.hpp
+++ b/src/game/context.hpp
@@ -216,6 +216,8 @@ struct context
 	std::vector<std::tuple<scene::text*, scene::text*>> menu_item_texts;
 	std::unordered_map<std::string, int> menu_item_indices;
 	int* menu_item_index;
+	animation<float>* menu_fade_animation;
+	animation<float>* title_fade_animation;
 	
 	// Surface scene
 	scene::collection* surface_scene;
diff --git a/src/game/menu.cpp b/src/game/menu.cpp
index 7a0648d..cd137a8 100644
--- a/src/game/menu.cpp
+++ b/src/game/menu.cpp
@@ -20,6 +20,9 @@
 #include "game/menu.hpp"
 #include "scene/text.hpp"
 #include "application.hpp"
+#include "animation/animation.hpp"
+#include "animation/animator.hpp"
+#include "animation/ease.hpp"
 #include <algorithm>
 
 namespace game {
@@ -117,14 +120,12 @@ void align_text(game::context* ctx, bool center, bool has_back, float anchor_y)
 	for (std::size_t i = 0; i < ctx->menu_item_texts.size(); ++i)
 	{
 		auto [name, value] = ctx->menu_item_texts[i];
-
 		
 		float x = menu_x;
 		float y = menu_y - ctx->menu_font.get_font_metrics().linespace * i;
 		if (has_back && i == ctx->menu_item_texts.size() - 1)
 			y -= ctx->menu_font.get_font_metrics().linespace;
 		
-		
 		if (center || i == ctx->menu_item_texts.size() - 1)
 		{
 			const auto& name_bounds = static_cast<const geom::aabb<float>&>(name->get_local_bounds());
@@ -190,6 +191,13 @@ void delete_text(game::context* ctx)
 	ctx->menu_item_texts.clear();
 }
 
+void delete_animations(game::context* ctx)
+{
+	ctx->animator->remove_animation(ctx->menu_fade_animation);
+	delete ctx->menu_fade_animation;
+	ctx->menu_fade_animation = nullptr;
+}
+
 void clear_callbacks(game::context* ctx)
 {
 	// Clear menu item callbacks
@@ -199,6 +207,78 @@ void clear_callbacks(game::context* ctx)
 	ctx->menu_back_callback = nullptr;
 }
 
+void setup_animations(game::context* ctx)
+{
+	ctx->menu_fade_animation = new animation<float>();
+	animation_channel<float>* opacity_channel = ctx->menu_fade_animation->add_channel(0);
+	
+	ctx->menu_fade_animation->set_frame_callback
+	(
+		[ctx](int channel, const float& opacity)
+		{
+			for (std::size_t i = 0; i < ctx->menu_item_texts.size(); ++i)
+			{
+				auto [name, value] = ctx->menu_item_texts[i];
+				
+				float4 color = (i == *ctx->menu_item_index) ? active_color : inactive_color;
+				color[3] = color[3] * opacity;
+				
+				if (name)
+					name->set_color(color);
+				if (value)
+					value->set_color(color);
+			}
+		}
+	);
+	
+	ctx->animator->add_animation(ctx->menu_fade_animation);
+}
+
+void fade_in(game::context* ctx, const std::function<void()>& end_callback)
+{
+	ctx->menu_fade_animation->set_interpolator(ease<float>::out_cubic);
+	animation_channel<float>* opacity_channel = ctx->menu_fade_animation->get_channel(0);
+	opacity_channel->remove_keyframes();
+	opacity_channel->insert_keyframe({0.0, 0.0f});
+	opacity_channel->insert_keyframe({game::menu::fade_in_duration, 1.0f});
+	ctx->menu_fade_animation->set_end_callback(end_callback);
+	
+	for (std::size_t i = 0; i < ctx->menu_item_texts.size(); ++i)
+	{
+		auto [name, value] = ctx->menu_item_texts[i];
+		
+		float4 color = (i == *ctx->menu_item_index) ? active_color : inactive_color;
+		color[3] = 0.0f;
+		
+		if (name)
+		{
+			name->set_color(color);
+			name->update_tweens();
+		}
+		if (value)
+		{
+			value->set_color(color);
+			value->update_tweens();
+		}
+	}
+	
+	ctx->menu_fade_animation->stop();
+	ctx->menu_fade_animation->play();
+}
+
+void fade_out(game::context* ctx, const std::function<void()>& end_callback)
+{
+	ctx->menu_fade_animation->set_interpolator(ease<float>::out_cubic);
+	animation_channel<float>* opacity_channel = ctx->menu_fade_animation->get_channel(0);
+	opacity_channel->remove_keyframes();
+	opacity_channel->insert_keyframe({0.0, 1.0f});
+	opacity_channel->insert_keyframe({game::menu::fade_out_duration, 0.0f});
+	ctx->menu_fade_animation->set_end_callback(end_callback);
+	
+	ctx->menu_fade_animation->stop();
+	ctx->menu_fade_animation->play();
+}
+
 void setup_controls(game::context* ctx)
 {	
 	ctx->controls["menu_up"]->set_activated_callback
diff --git a/src/game/menu.hpp b/src/game/menu.hpp
index 91a3544..093ec43 100644
--- a/src/game/menu.hpp
+++ b/src/game/menu.hpp
@@ -37,13 +37,24 @@ static constexpr float4 inactive_color{1.0f, 1.0f, 1.0f, 0.5f};
 /// Padding of the mouseover bounds, as a percentage of the font size.
 static constexpr float mouseover_padding = 0.1f;
 
+/// Duration of the menu fade in animation
+static constexpr float fade_in_duration = 0.25f;
+
+/// Duration of the menu fade out animation
+static constexpr float fade_out_duration = 0.25f;
+
 void init_menu_item_index(game::context* ctx, const std::string& menu_name);
 void setup_controls(game::context* ctx);
+void setup_animations(game::context* ctx);
 
 void clear_controls(game::context* ctx);
 void clear_callbacks(game::context* ctx);
 void remove_text_from_ui(game::context* ctx);
 void delete_text(game::context* ctx);
+void delete_animations(game::context* ctx);
+
+void fade_in(game::context* ctx, const std::function<void()>& end_callback);
+void fade_out(game::context* ctx, const std::function<void()>& end_callback);
 
 void update_text_color(game::context* ctx);
 void update_text_font(game::context* ctx);
diff --git a/src/game/states/controls-menu.cpp b/src/game/states/controls-menu.cpp
index 5327977..1a30c4a 100644
--- a/src/game/states/controls-menu.cpp
+++ b/src/game/states/controls-menu.cpp
@@ -59,31 +59,62 @@ void enter(game::context* ctx)
 	game::menu::align_text(ctx);
 	game::menu::update_text_tweens(ctx);
 	game::menu::add_text_to_ui(ctx);
+	game::menu::setup_animations(ctx);
 	
 	// Construct menu item callbacks
 	auto select_keyboard_callback = [ctx]()
 	{
-		application::state next_state;
-		next_state.name = "keyboard_config_menu";
-		next_state.enter = std::bind(game::state::keyboard_config_menu::enter, ctx);
-		next_state.exit = std::bind(game::state::keyboard_config_menu::exit, ctx);
-		ctx->app->change_state(next_state);
+		// Disable controls
+		game::menu::clear_controls(ctx);
+		
+		game::menu::fade_out
+		(
+			ctx,
+			[ctx]()
+			{
+				application::state next_state;
+				next_state.name = "keyboard_config_menu";
+				next_state.enter = std::bind(game::state::keyboard_config_menu::enter, ctx);
+				next_state.exit = std::bind(game::state::keyboard_config_menu::exit, ctx);
+				ctx->app->queue_state(next_state);
+			}
+		);
 	};
 	auto select_gamepad_callback = [ctx]()
 	{
-		application::state next_state;
-		next_state.name = "gamepad_config_menu";
-		next_state.enter = std::bind(game::state::gamepad_config_menu::enter, ctx);
-		next_state.exit = std::bind(game::state::gamepad_config_menu::exit, ctx);
-		ctx->app->change_state(next_state);
+		// Disable controls
+		game::menu::clear_controls(ctx);
+		
+		game::menu::fade_out
+		(
+			ctx,
+			[ctx]()
+			{
+				application::state next_state;
+				next_state.name = "gamepad_config_menu";
+				next_state.enter = std::bind(game::state::gamepad_config_menu::enter, ctx);
+				next_state.exit = std::bind(game::state::gamepad_config_menu::exit, ctx);
+				ctx->app->queue_state(next_state);
+			}
+		);
 	};
 	auto select_back_callback = [ctx]()
 	{
-		application::state next_state;
-		next_state.name = "options_menu";
-		next_state.enter = std::bind(game::state::options_menu::enter, ctx);
-		next_state.exit = std::bind(game::state::options_menu::exit, ctx);
-		ctx->app->change_state(next_state);
+		// Disable controls
+		game::menu::clear_controls(ctx);
+		
+		game::menu::fade_out
+		(
+			ctx,
+			[ctx]()
+			{
+				application::state next_state;
+				next_state.name = "options_menu";
+				next_state.enter = std::bind(game::state::options_menu::enter, ctx);
+				next_state.exit = std::bind(game::state::options_menu::exit, ctx);
+				ctx->app->queue_state(next_state);
+			}
+		);
 	};
 	
 	// Build list of menu select callbacks
@@ -108,6 +139,9 @@ void enter(game::context* ctx)
 	timeline* timeline = ctx->timeline;
 	float t = timeline->get_position();
 	timeline->add_sequence({{t + game::menu::input_delay, std::bind(game::menu::setup_controls, ctx)}});
+	
+	// Fade in menu
+	game::menu::fade_in(ctx, nullptr);
 }
 
 void exit(game::context* ctx)
@@ -115,6 +149,7 @@ void exit(game::context* ctx)
 	// Destruct menu
 	game::menu::clear_controls(ctx);
 	game::menu::clear_callbacks(ctx);
+	game::menu::delete_animations(ctx);
 	game::menu::remove_text_from_ui(ctx);
 	game::menu::delete_text(ctx);
 	
diff --git a/src/game/states/credits.cpp b/src/game/states/credits.cpp
index 5cf6795..500f8af 100644
--- a/src/game/states/credits.cpp
+++ b/src/game/states/credits.cpp
@@ -18,7 +18,7 @@
  */
 
 #include "game/states/credits.hpp"
-#include "game/states/main-menu.hpp"
+#include "game/states/extras-menu.hpp"
 #include "animation/ease.hpp"
 #include "animation/animation.hpp"
 #include "animation/animator.hpp"
@@ -101,9 +101,9 @@ void enter(game::context* ctx)
 					
 					// Change state
 					application::state next_state;
-					next_state.name = "main_menu";
-					next_state.enter = std::bind(game::state::main_menu::enter, ctx);
-					next_state.exit = std::bind(game::state::main_menu::exit, ctx);
+					next_state.name = "extras_menu";
+					next_state.enter = std::bind(game::state::extras_menu::enter, ctx);
+					next_state.exit = std::bind(game::state::extras_menu::exit, ctx);
 					ctx->app->change_state(next_state);
 				}
 			}
diff --git a/src/game/states/extras-menu.cpp b/src/game/states/extras-menu.cpp
new file mode 100644
index 0000000..914a1d9
--- /dev/null
+++ b/src/game/states/extras-menu.cpp
@@ -0,0 +1,137 @@
+/*
+ * Copyright (C) 2021  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/extras-menu.hpp"
+#include "game/states/main-menu.hpp"
+#include "game/states/credits.hpp"
+#include "application.hpp"
+#include "scene/text.hpp"
+#include "render/passes/clear-pass.hpp"
+#include "debug/logger.hpp"
+#include "game/fonts.hpp"
+#include "game/menu.hpp"
+#include "animation/timeline.hpp"
+
+namespace game {
+namespace state {
+namespace extras_menu {
+
+void enter(game::context* ctx)
+{
+	ctx->ui_clear_pass->set_cleared_buffers(true, true, false);
+	
+	// Construct menu item texts
+	scene::text* credits_text = new scene::text();
+	scene::text* back_text = new scene::text();
+	
+	// Build list of menu item texts
+	ctx->menu_item_texts.push_back({credits_text, nullptr});
+	ctx->menu_item_texts.push_back({back_text, nullptr});
+	
+	// Set content of menu item texts
+	credits_text->set_content((*ctx->strings)["extras_menu_credits"]);
+	back_text->set_content((*ctx->strings)["back"]);
+	
+	// Init menu item index
+	game::menu::init_menu_item_index(ctx, "extras");
+	
+	game::menu::update_text_color(ctx);
+	game::menu::update_text_font(ctx);
+	game::menu::align_text(ctx);
+	game::menu::update_text_tweens(ctx);
+	game::menu::add_text_to_ui(ctx);
+	game::menu::setup_animations(ctx);
+	
+	// Construct menu item callbacks
+	auto select_credits_callback = [ctx]()
+	{
+		// Disable controls
+		game::menu::clear_controls(ctx);
+		
+		game::menu::fade_out
+		(
+			ctx,
+			[ctx]()
+			{
+				application::state next_state;
+				next_state.name = "credits";
+				next_state.enter = std::bind(game::state::credits::enter, ctx);
+				next_state.exit = std::bind(game::state::credits::exit, ctx);
+				ctx->app->queue_state(next_state);
+			}
+		);
+	};
+	auto select_back_callback = [ctx]()
+	{
+		// Disable controls
+		game::menu::clear_controls(ctx);
+		
+		game::menu::fade_out
+		(
+			ctx,
+			[ctx]()
+			{
+				application::state next_state;
+				next_state.name = "main_menu";
+				next_state.enter = std::bind(game::state::main_menu::enter, ctx, false);
+				next_state.exit = std::bind(game::state::main_menu::exit, ctx);
+				ctx->app->queue_state(next_state);
+			}
+		);
+	};
+	
+	// Build list of menu select callbacks
+	ctx->menu_select_callbacks.push_back(select_credits_callback);
+	ctx->menu_select_callbacks.push_back(select_back_callback);
+	
+	// Build list of menu left callbacks
+	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);
+	
+	// Set menu back callback
+	ctx->menu_back_callback = select_back_callback;
+	
+	// Schedule menu control setup
+	timeline* timeline = ctx->timeline;
+	float t = timeline->get_position();
+	timeline->add_sequence({{t + game::menu::input_delay, std::bind(game::menu::setup_controls, ctx)}});
+	
+	// Fade in menu
+	game::menu::fade_in(ctx, nullptr);
+}
+
+void exit(game::context* ctx)
+{
+	// Destruct menu
+	game::menu::clear_controls(ctx);
+	game::menu::clear_callbacks(ctx);
+	game::menu::delete_animations(ctx);
+	game::menu::remove_text_from_ui(ctx);
+	game::menu::delete_text(ctx);
+	
+	ctx->ui_clear_pass->set_cleared_buffers(false, true, false);
+}
+
+} // namespace extras_menu
+} // namespace state
+} // namespace game
diff --git a/src/game/states/extras-menu.hpp b/src/game/states/extras-menu.hpp
new file mode 100644
index 0000000..ee1a9ac
--- /dev/null
+++ b/src/game/states/extras-menu.hpp
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2021  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_GAME_STATE_EXTRAS_MENU_HPP
+#define ANTKEEPER_GAME_STATE_EXTRAS_MENU_HPP
+
+#include "game/context.hpp"
+
+namespace game {
+namespace state {
+
+/// Extras menu screen game state functions.
+namespace extras_menu {
+
+void enter(game::context* ctx);
+void exit(game::context* ctx);
+
+} // namespace extras_menu
+
+} // namespace state
+} // namespace game
+
+#endif // ANTKEEPER_GAME_STATE_EXTRAS_MENU_HPP
diff --git a/src/game/states/gamepad-config-menu.cpp b/src/game/states/gamepad-config-menu.cpp
index 1ff433d..bd81464 100644
--- a/src/game/states/gamepad-config-menu.cpp
+++ b/src/game/states/gamepad-config-menu.cpp
@@ -310,15 +310,26 @@ void enter(game::context* ctx)
 	game::menu::align_text(ctx);
 	game::menu::update_text_tweens(ctx);
 	game::menu::add_text_to_ui(ctx);
+	game::menu::setup_animations(ctx);
 	
 	// Construct menu item callbacks
 	auto select_back_callback = [ctx]()
 	{
-		application::state next_state;
-		next_state.name = "controls_menu";
-		next_state.enter = std::bind(game::state::controls_menu::enter, ctx);
-		next_state.exit = std::bind(game::state::controls_menu::exit, ctx);
-		ctx->app->change_state(next_state);
+		// Disable controls
+		game::menu::clear_controls(ctx);
+		
+		game::menu::fade_out
+		(
+			ctx,
+			[ctx]()
+			{
+				application::state next_state;
+				next_state.name = "controls_menu";
+				next_state.enter = std::bind(game::state::controls_menu::enter, ctx);
+				next_state.exit = std::bind(game::state::controls_menu::exit, ctx);
+				ctx->app->queue_state(next_state);
+			}
+		);
 	};
 	
 	// Build list of menu select callbacks
@@ -337,6 +348,9 @@ void enter(game::context* ctx)
 	timeline* timeline = ctx->timeline;
 	float t = timeline->get_position();
 	timeline->add_sequence({{t + game::menu::input_delay, std::bind(game::menu::setup_controls, ctx)}});
+	
+	// Fade in menu
+	game::menu::fade_in(ctx, nullptr);
 }
 
 void exit(game::context* ctx)
@@ -344,6 +358,7 @@ void exit(game::context* ctx)
 	// Destruct menu
 	game::menu::clear_controls(ctx);
 	game::menu::clear_callbacks(ctx);
+	game::menu::delete_animations(ctx);
 	game::menu::remove_text_from_ui(ctx);
 	game::menu::delete_text(ctx);
 	
diff --git a/src/game/states/graphics-menu.cpp b/src/game/states/graphics-menu.cpp
index 046776c..40ec570 100644
--- a/src/game/states/graphics-menu.cpp
+++ b/src/game/states/graphics-menu.cpp
@@ -91,6 +91,7 @@ void enter(game::context* ctx)
 	game::menu::align_text(ctx);
 	game::menu::update_text_tweens(ctx);
 	game::menu::add_text_to_ui(ctx);
+	game::menu::setup_animations(ctx);
 	
 	// Construct menu item callbacks
 	auto toggle_fullscreen_callback = [ctx]()
@@ -271,11 +272,21 @@ void enter(game::context* ctx)
 	};
 	auto select_back_callback = [ctx]()
 	{
-		application::state next_state;
-		next_state.name = "options_menu";
-		next_state.enter = std::bind(game::state::options_menu::enter, ctx);
-		next_state.exit = std::bind(game::state::options_menu::exit, ctx);
-		ctx->app->change_state(next_state);
+		// Disable controls
+		game::menu::clear_controls(ctx);
+		
+		game::menu::fade_out
+		(
+			ctx,
+			[ctx]()
+			{
+				application::state next_state;
+				next_state.name = "options_menu";
+				next_state.enter = std::bind(game::state::options_menu::enter, ctx);
+				next_state.exit = std::bind(game::state::options_menu::exit, ctx);
+				ctx->app->queue_state(next_state);
+			}
+		);
 	};
 	
 	// Build list of menu select callbacks
@@ -309,6 +320,9 @@ void enter(game::context* ctx)
 	timeline* timeline = ctx->timeline;
 	float t = timeline->get_position();
 	timeline->add_sequence({{t + game::menu::input_delay, std::bind(game::menu::setup_controls, ctx)}});
+	
+	// Fade in menu
+	game::menu::fade_in(ctx, nullptr);
 }
 
 void exit(game::context* ctx)
@@ -316,6 +330,7 @@ void exit(game::context* ctx)
 	// Destruct menu
 	game::menu::clear_controls(ctx);
 	game::menu::clear_callbacks(ctx);
+	game::menu::delete_animations(ctx);
 	game::menu::remove_text_from_ui(ctx);
 	game::menu::delete_text(ctx);
 	
diff --git a/src/game/states/keyboard-config-menu.cpp b/src/game/states/keyboard-config-menu.cpp
index e895f47..f197f10 100644
--- a/src/game/states/keyboard-config-menu.cpp
+++ b/src/game/states/keyboard-config-menu.cpp
@@ -265,15 +265,26 @@ void enter(game::context* ctx)
 	game::menu::align_text(ctx);
 	game::menu::update_text_tweens(ctx);
 	game::menu::add_text_to_ui(ctx);
+	game::menu::setup_animations(ctx);
 	
 	// Construct menu item callbacks
 	auto select_back_callback = [ctx]()
 	{
-		application::state next_state;
-		next_state.name = "controls_menu";
-		next_state.enter = std::bind(game::state::controls_menu::enter, ctx);
-		next_state.exit = std::bind(game::state::controls_menu::exit, ctx);
-		ctx->app->change_state(next_state);
+		// Disable controls
+		game::menu::clear_controls(ctx);
+		
+		game::menu::fade_out
+		(
+			ctx,
+			[ctx]()
+			{
+				application::state next_state;
+				next_state.name = "controls_menu";
+				next_state.enter = std::bind(game::state::controls_menu::enter, ctx);
+				next_state.exit = std::bind(game::state::controls_menu::exit, ctx);
+				ctx->app->queue_state(next_state);
+			}
+		);
 	};
 	
 	// Build list of menu select callbacks
@@ -292,6 +303,9 @@ void enter(game::context* ctx)
 	timeline* timeline = ctx->timeline;
 	float t = timeline->get_position();
 	timeline->add_sequence({{t + game::menu::input_delay, std::bind(game::menu::setup_controls, ctx)}});
+	
+	// Fade in menu
+	game::menu::fade_in(ctx, nullptr);
 }
 
 void exit(game::context* ctx)
@@ -299,6 +313,7 @@ void exit(game::context* ctx)
 	// Destruct menu
 	game::menu::clear_controls(ctx);
 	game::menu::clear_callbacks(ctx);
+	game::menu::delete_animations(ctx);
 	game::menu::remove_text_from_ui(ctx);
 	game::menu::delete_text(ctx);
 	
diff --git a/src/game/states/language-menu.cpp b/src/game/states/language-menu.cpp
index 6101ab1..13b17a5 100644
--- a/src/game/states/language-menu.cpp
+++ b/src/game/states/language-menu.cpp
@@ -65,6 +65,7 @@ void enter(game::context* ctx)
 	game::menu::align_text(ctx);
 	game::menu::update_text_tweens(ctx);
 	game::menu::add_text_to_ui(ctx);
+	game::menu::setup_animations(ctx);
 	
 	// Construct menu item callbacks
 	auto next_language_callback = [ctx]()
@@ -137,11 +138,21 @@ void enter(game::context* ctx)
 	};
 	auto select_back_callback = [ctx]()
 	{
-		application::state next_state;
-		next_state.name = "options_menu";
-		next_state.enter = std::bind(game::state::options_menu::enter, ctx);
-		next_state.exit = std::bind(game::state::options_menu::exit, ctx);
-		ctx->app->change_state(next_state);
+		// Disable controls
+		game::menu::clear_controls(ctx);
+		
+		game::menu::fade_out
+		(
+			ctx,
+			[ctx]()
+			{
+				application::state next_state;
+				next_state.name = "options_menu";
+				next_state.enter = std::bind(game::state::options_menu::enter, ctx);
+				next_state.exit = std::bind(game::state::options_menu::exit, ctx);
+				ctx->app->queue_state(next_state);
+			}
+		);
 	};
 	
 	// Build list of menu select callbacks
@@ -163,6 +174,9 @@ void enter(game::context* ctx)
 	timeline* timeline = ctx->timeline;
 	float t = timeline->get_position();
 	timeline->add_sequence({{t + game::menu::input_delay, std::bind(game::menu::setup_controls, ctx)}});
+	
+	// Fade in menu
+	game::menu::fade_in(ctx, nullptr);
 }
 
 void exit(game::context* ctx)
@@ -170,6 +184,7 @@ void exit(game::context* ctx)
 	// Destruct menu
 	game::menu::clear_controls(ctx);
 	game::menu::clear_callbacks(ctx);
+	game::menu::delete_animations(ctx);
 	game::menu::remove_text_from_ui(ctx);
 	game::menu::delete_text(ctx);
 	
diff --git a/src/game/states/loading.cpp b/src/game/states/loading.cpp
index 4b9ca3d..41deb6a 100644
--- a/src/game/states/loading.cpp
+++ b/src/game/states/loading.cpp
@@ -130,7 +130,7 @@ void enter(game::context* ctx)
 	if (ctx->option_quick_start.has_value())
 	{
 		next_state.name = "main_menu";
-		next_state.enter = std::bind(game::state::main_menu::enter, ctx);
+		next_state.enter = std::bind(game::state::main_menu::enter, ctx, true);
 		next_state.exit = std::bind(game::state::main_menu::exit, ctx);
 	}
 	else
diff --git a/src/game/states/main-menu.cpp b/src/game/states/main-menu.cpp
index 075203a..cd58ea0 100644
--- a/src/game/states/main-menu.cpp
+++ b/src/game/states/main-menu.cpp
@@ -19,9 +19,9 @@
 
 #include "game/states/main-menu.hpp"
 #include "game/states/options-menu.hpp"
+#include "game/states/extras-menu.hpp"
 #include "game/states/forage.hpp"
 #include "game/states/nuptial-flight.hpp"
-#include "game/states/credits.hpp"
 #include "game/menu.hpp"
 #include "render/passes/clear-pass.hpp"
 #include "resources/resource-manager.hpp"
@@ -38,7 +38,29 @@ namespace game {
 namespace state {
 namespace main_menu {
 
-void enter(game::context* ctx)
+static void fade_in_title(game::context* ctx)
+{
+	ctx->title_fade_animation->set_interpolator(ease<float>::out_cubic);
+	animation_channel<float>* opacity_channel = ctx->title_fade_animation->get_channel(0);
+	opacity_channel->remove_keyframes();
+	opacity_channel->insert_keyframe({0.0, 0.0f});
+	opacity_channel->insert_keyframe({game::menu::fade_in_duration, 1.0f});
+	ctx->title_fade_animation->stop();
+	ctx->title_fade_animation->play();
+}
+
+static void fade_out_title(game::context* ctx)
+{
+	ctx->title_fade_animation->set_interpolator(ease<float>::out_cubic);
+	animation_channel<float>* opacity_channel = ctx->title_fade_animation->get_channel(0);
+	opacity_channel->remove_keyframes();
+	opacity_channel->insert_keyframe({0.0, 1.0f});
+	opacity_channel->insert_keyframe({game::menu::fade_out_duration, 0.0f});
+	ctx->title_fade_animation->stop();
+	ctx->title_fade_animation->play();
+}
+
+void enter(game::context* ctx, bool fade_in)
 {
 	ctx->ui_clear_pass->set_cleared_buffers(true, true, false);
 	
@@ -54,27 +76,42 @@ void enter(game::context* ctx)
 	float title_w = title_aabb.max_point.x - title_aabb.min_point.x;
 	float title_h = title_aabb.max_point.y - title_aabb.min_point.y;
 	ctx->title_text->set_translation({std::round(-title_w * 0.5f), std::round(-title_h * 0.5f + (std::get<1>(ctx->app->get_viewport_dimensions()) / 3.0f) / 2.0f), 0.0f});
+	ctx->title_text->update_tweens();
 	
 	// Add title text to UI
 	ctx->ui_scene->add_object(ctx->title_text);
-	ctx->title_text->update_tweens();
+	
+	// Construct title fade animation
+	ctx->title_fade_animation = new animation<float>();
+	animation_channel<float>* opacity_channel = ctx->title_fade_animation->add_channel(0);
+	
+	ctx->title_fade_animation->set_frame_callback
+	(
+		[ctx](int channel, const float& opacity)
+		{
+			float4 color = ctx->title_text->get_color();
+			color[3] = opacity;
+			ctx->title_text->set_color(color);
+		}
+	);
+	ctx->animator->add_animation(ctx->title_fade_animation);
 	
 	// Construct menu item texts
 	scene::text* start_text = new scene::text();
 	scene::text* options_text = new scene::text();
-	scene::text* credits_text = new scene::text();
+	scene::text* extras_text = new scene::text();
 	scene::text* quit_text = new scene::text();
 	
 	// Build list of menu item texts
 	ctx->menu_item_texts.push_back({start_text, nullptr});
 	ctx->menu_item_texts.push_back({options_text, nullptr});
-	ctx->menu_item_texts.push_back({credits_text, nullptr});
+	ctx->menu_item_texts.push_back({extras_text, nullptr});
 	ctx->menu_item_texts.push_back({quit_text, nullptr});
 	
 	// Set content of menu item texts
 	start_text->set_content((*ctx->strings)["main_menu_start"]);
 	options_text->set_content((*ctx->strings)["main_menu_options"]);
-	credits_text->set_content((*ctx->strings)["main_menu_credits"]);
+	extras_text->set_content((*ctx->strings)["main_menu_extras"]);
 	quit_text->set_content((*ctx->strings)["main_menu_quit"]);
 	
 	// Init menu item index
@@ -85,6 +122,7 @@ void enter(game::context* ctx)
 	game::menu::align_text(ctx, true, false, (-std::get<1>(ctx->app->get_viewport_dimensions()) / 3.0f) / 2.0f);
 	game::menu::update_text_tweens(ctx);
 	game::menu::add_text_to_ui(ctx);
+	game::menu::setup_animations(ctx);
 	
 	auto select_start_callback = [ctx]()
 	{
@@ -112,23 +150,50 @@ void enter(game::context* ctx)
 		
 		// Start fade out to white
 		ctx->fade_transition_color->set_value({1, 1, 1});
-		ctx->fade_transition->transition(fade_out_duration, false, ease<float>::out_quad, false);
+		ctx->fade_transition->transition(fade_out_duration, false, ease<float>::out_cubic, false);
 	};
 	auto select_options_callback = [ctx]()
 	{
-		application::state next_state;
-		next_state.name = "options_menu";
-		next_state.enter = std::bind(game::state::options_menu::enter, ctx);
-		next_state.exit = std::bind(game::state::options_menu::exit, ctx);
-		ctx->app->change_state(next_state);
+		game::menu::clear_controls(ctx);
+		
+		// Fade out title
+		fade_out_title(ctx);
+		
+		// Fade out menu
+		game::menu::fade_out
+		(
+			ctx,
+			[ctx]()
+			{
+				application::state next_state;
+				next_state.name = "options_menu";
+				next_state.enter = std::bind(game::state::options_menu::enter, ctx);
+				next_state.exit = std::bind(game::state::options_menu::exit, ctx);
+				ctx->app->queue_state(next_state);
+			}
+		);
 	};
-	auto select_credits_callback = [ctx]()
+	auto select_extras_callback = [ctx]()
 	{
-		application::state next_state;
-		next_state.name = "credits";
-		next_state.enter = std::bind(game::state::credits::enter, ctx);
-		next_state.exit = std::bind(game::state::credits::exit, ctx);
-		ctx->app->change_state(next_state);
+		// Disable controls
+		game::menu::clear_controls(ctx);
+		
+		// Fade out title
+		fade_out_title(ctx);
+		
+		// Fade out menu
+		game::menu::fade_out
+		(
+			ctx,
+			[ctx]()
+			{
+				application::state next_state;
+				next_state.name = "extras_menu";
+				next_state.enter = std::bind(game::state::extras_menu::enter, ctx);
+				next_state.exit = std::bind(game::state::extras_menu::exit, ctx);
+				ctx->app->queue_state(next_state);
+			}
+		);
 	};
 	auto select_quit_callback = [ctx]()
 	{
@@ -138,7 +203,7 @@ void enter(game::context* ctx)
 	// 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_credits_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
@@ -160,16 +225,37 @@ void enter(game::context* ctx)
 	timeline* timeline = ctx->timeline;
 	float t = timeline->get_position();
 	timeline->add_sequence({{t + game::menu::input_delay, std::bind(game::menu::setup_controls, ctx)}});
+	
+	if (fade_in)
+	{
+		ctx->fade_transition->transition(0.5f, true, ease<float>::out_cubic);
+	}
+	else
+	{
+		// Fade in title
+		ctx->title_text->set_color({1.0f, 1.0f, 1.0f, 0.0f});
+		ctx->title_text->update_tweens();
+		fade_in_title(ctx);
+		
+		// Fade in menu
+		game::menu::fade_in(ctx, nullptr);
+	}
 }
 
 void exit(game::context* ctx)
-{
+{	
 	// Destruct menu
 	game::menu::clear_controls(ctx);
 	game::menu::clear_callbacks(ctx);
+	game::menu::delete_animations(ctx);
 	game::menu::remove_text_from_ui(ctx);
 	game::menu::delete_text(ctx);
 	
+	// Destruct title animation
+	ctx->animator->remove_animation(ctx->title_fade_animation);
+	delete ctx->title_fade_animation;
+	ctx->title_fade_animation = nullptr;
+	
 	// Destruct title text
 	ctx->ui_scene->remove_object(ctx->title_text);
 	delete ctx->title_text;
diff --git a/src/game/states/main-menu.hpp b/src/game/states/main-menu.hpp
index 4164422..da607cd 100644
--- a/src/game/states/main-menu.hpp
+++ b/src/game/states/main-menu.hpp
@@ -28,7 +28,7 @@ namespace state {
 /// Main menu screen game state functions.
 namespace main_menu {
 
-void enter(game::context* ctx);
+void enter(game::context* ctx, bool fade_in);
 void exit(game::context* ctx);
 
 } // namespace main_menu
diff --git a/src/game/states/options-menu.cpp b/src/game/states/options-menu.cpp
index 907b697..ffc59b6 100644
--- a/src/game/states/options-menu.cpp
+++ b/src/game/states/options-menu.cpp
@@ -70,51 +70,106 @@ void enter(game::context* ctx)
 	game::menu::align_text(ctx, true);
 	game::menu::update_text_tweens(ctx);
 	game::menu::add_text_to_ui(ctx);
+	game::menu::setup_animations(ctx);
 	
 	// Construct menu item callbacks
 	auto select_controls_callback = [ctx]()
 	{
-		application::state next_state;
-		next_state.name = "controls_menu";
-		next_state.enter = std::bind(game::state::controls_menu::enter, ctx);
-		next_state.exit = std::bind(game::state::controls_menu::exit, ctx);
-		ctx->app->change_state(next_state);
+		// Disable controls
+		game::menu::clear_controls(ctx);
+		
+		// Return to main menu
+		game::menu::fade_out
+		(
+			ctx,
+			[ctx]()
+			{
+				application::state next_state;
+				next_state.name = "controls_menu";
+				next_state.enter = std::bind(game::state::controls_menu::enter, ctx);
+				next_state.exit = std::bind(game::state::controls_menu::exit, ctx);
+				ctx->app->queue_state(next_state);
+			}
+		);
 	};
 	auto select_graphics_callback = [ctx]()
 	{
-		application::state next_state;
-		next_state.name = "graphics_menu";
-		next_state.enter = std::bind(game::state::graphics_menu::enter, ctx);
-		next_state.exit = std::bind(game::state::graphics_menu::exit, ctx);
-		ctx->app->change_state(next_state);
+		// Disable controls
+		game::menu::clear_controls(ctx);
+		
+		// Return to main menu
+		game::menu::fade_out
+		(
+			ctx,
+			[ctx]()
+			{
+				application::state next_state;
+				next_state.name = "graphics_menu";
+				next_state.enter = std::bind(game::state::graphics_menu::enter, ctx);
+				next_state.exit = std::bind(game::state::graphics_menu::exit, ctx);
+				ctx->app->queue_state(next_state);
+			}
+		);
 	};
 	auto select_sound_callback = [ctx]()
 	{
-		application::state next_state;
-		next_state.name = "sound_menu";
-		next_state.enter = std::bind(game::state::sound_menu::enter, ctx);
-		next_state.exit = std::bind(game::state::sound_menu::exit, ctx);
-		ctx->app->change_state(next_state);
+		// Disable controls
+		game::menu::clear_controls(ctx);
+		
+		// Return to main menu
+		game::menu::fade_out
+		(
+			ctx,
+			[ctx]()
+			{
+				application::state next_state;
+				next_state.name = "sound_menu";
+				next_state.enter = std::bind(game::state::sound_menu::enter, ctx);
+				next_state.exit = std::bind(game::state::sound_menu::exit, ctx);
+				ctx->app->queue_state(next_state);
+			}
+		);
 	};
 	auto select_language_callback = [ctx]()
 	{
-		application::state next_state;
-		next_state.name = "language_menu";
-		next_state.enter = std::bind(game::state::language_menu::enter, ctx);
-		next_state.exit = std::bind(game::state::language_menu::exit, ctx);
-		ctx->app->change_state(next_state);
+		// Disable controls
+		game::menu::clear_controls(ctx);
+		
+		// Return to main menu
+		game::menu::fade_out
+		(
+			ctx,
+			[ctx]()
+			{
+				application::state next_state;
+				next_state.name = "language_menu";
+				next_state.enter = std::bind(game::state::language_menu::enter, ctx);
+				next_state.exit = std::bind(game::state::language_menu::exit, ctx);
+				ctx->app->queue_state(next_state);
+			}
+		);
 	};
 	auto select_back_callback = [ctx]()
 	{
+		// Disable controls
+		game::menu::clear_controls(ctx);
+		
 		// Save config
 		game::save_config(ctx);
 		
 		// Return to main menu
-		application::state next_state;
-		next_state.name = "main_menu";
-		next_state.enter = std::bind(game::state::main_menu::enter, ctx);
-		next_state.exit = std::bind(game::state::main_menu::exit, ctx);
-		ctx->app->change_state(next_state);
+		game::menu::fade_out
+		(
+			ctx,
+			[ctx]()
+			{
+				application::state next_state;
+				next_state.name = "main_menu";
+				next_state.enter = std::bind(game::state::main_menu::enter, ctx, false);
+				next_state.exit = std::bind(game::state::main_menu::exit, ctx);
+				ctx->app->queue_state(next_state);
+			}
+		);
 	};
 	
 	// Build list of menu select callbacks
@@ -137,6 +192,9 @@ void enter(game::context* ctx)
 	timeline* timeline = ctx->timeline;
 	float t = timeline->get_position();
 	timeline->add_sequence({{t + game::menu::input_delay, std::bind(game::menu::setup_controls, ctx)}});
+	
+	// Fade in menu
+	game::menu::fade_in(ctx, nullptr);
 }
 
 void exit(game::context* ctx)
@@ -144,6 +202,7 @@ void exit(game::context* ctx)
 	// Destruct menu
 	game::menu::clear_controls(ctx);
 	game::menu::clear_callbacks(ctx);
+	game::menu::delete_animations(ctx);
 	game::menu::remove_text_from_ui(ctx);
 	game::menu::delete_text(ctx);
 	
diff --git a/src/game/states/sound-menu.cpp b/src/game/states/sound-menu.cpp
index b27f345..69c17f2 100644
--- a/src/game/states/sound-menu.cpp
+++ b/src/game/states/sound-menu.cpp
@@ -89,7 +89,7 @@ void enter(game::context* ctx)
 	game::menu::align_text(ctx);
 	game::menu::update_text_tweens(ctx);
 	game::menu::add_text_to_ui(ctx);
-	
+	game::menu::setup_animations(ctx);
 	
 	// Construct menu item callbacks
 	auto increase_volume_callback = [ctx](float* volume)
@@ -178,11 +178,21 @@ void enter(game::context* ctx)
 	};
 	auto select_back_callback = [ctx]()
 	{
-		application::state next_state;
-		next_state.name = "options_menu";
-		next_state.enter = std::bind(game::state::options_menu::enter, ctx);
-		next_state.exit = std::bind(game::state::options_menu::exit, ctx);
-		ctx->app->change_state(next_state);
+		// Disable controls
+		game::menu::clear_controls(ctx);
+		
+		game::menu::fade_out
+		(
+			ctx,
+			[ctx]()
+			{
+				application::state next_state;
+				next_state.name = "options_menu";
+				next_state.enter = std::bind(game::state::options_menu::enter, ctx);
+				next_state.exit = std::bind(game::state::options_menu::exit, ctx);
+				ctx->app->queue_state(next_state);
+			}
+		);
 	};
 	
 	// Build list of menu select callbacks
@@ -219,6 +229,9 @@ void enter(game::context* ctx)
 	timeline* timeline = ctx->timeline;
 	float t = timeline->get_position();
 	timeline->add_sequence({{t + game::menu::input_delay, std::bind(game::menu::setup_controls, ctx)}});
+	
+	// Fade in menu
+	game::menu::fade_in(ctx, nullptr);
 }
 
 void exit(game::context* ctx)
@@ -226,6 +239,7 @@ void exit(game::context* ctx)
 	// Destruct menu
 	game::menu::clear_controls(ctx);
 	game::menu::clear_callbacks(ctx);
+	game::menu::delete_animations(ctx);
 	game::menu::remove_text_from_ui(ctx);
 	game::menu::delete_text(ctx);
 	
diff --git a/src/game/states/splash.cpp b/src/game/states/splash.cpp
index 07acbcc..8019c34 100644
--- a/src/game/states/splash.cpp
+++ b/src/game/states/splash.cpp
@@ -49,7 +49,7 @@ void enter(game::context* ctx)
 	// Build splash fade in animation
 	ctx->splash_fade_in_animation = new animation<float>();
 	animation_channel<float>* splash_fade_in_opacity_channel = ctx->splash_fade_in_animation->add_channel(0);
-	ctx->splash_fade_in_animation->set_interpolator(ease<float>::in_quad);
+	ctx->splash_fade_in_animation->set_interpolator(ease<float>::out_cubic);
 	splash_fade_in_opacity_channel->insert_keyframe({0.0, 0.0f});
 	splash_fade_in_opacity_channel->insert_keyframe({splash_fade_in_duration, 1.0f});
 	splash_fade_in_opacity_channel->insert_keyframe({splash_fade_in_duration + splash_duration, 1.0f});
@@ -57,7 +57,7 @@ void enter(game::context* ctx)
 	// Build splash fade out animation
 	ctx->splash_fade_out_animation = new animation<float>();
 	animation_channel<float>* splash_fade_out_opacity_channel = ctx->splash_fade_out_animation->add_channel(0);
-	ctx->splash_fade_out_animation->set_interpolator(ease<float>::out_quad);
+	ctx->splash_fade_out_animation->set_interpolator(ease<float>::out_cubic);
 	splash_fade_out_opacity_channel->insert_keyframe({0.0, 1.0f});
 	splash_fade_out_opacity_channel->insert_keyframe({splash_fade_out_duration, 0.0f});
 	
@@ -95,7 +95,7 @@ void enter(game::context* ctx)
 		{
 			application::state next_state;
 			next_state.name = "main_menu";
-			next_state.enter = std::bind(game::state::main_menu::enter, ctx);
+			next_state.enter = std::bind(game::state::main_menu::enter, ctx, true);
 			next_state.exit = std::bind(game::state::main_menu::exit, ctx);
 			ctx->app->queue_state(next_state);
 		}
@@ -124,7 +124,7 @@ void enter(game::context* ctx)
 				// Change state
 				application::state next_state;
 				next_state.name = "main_menu";
-				next_state.enter = std::bind(game::state::main_menu::enter, ctx);
+				next_state.enter = std::bind(game::state::main_menu::enter, ctx, true);
 				next_state.exit = std::bind(game::state::main_menu::exit, ctx);
 				ctx->app->change_state(next_state);
 			}