diff --git a/README.md b/README.md
index 6305f7a..666327e 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,5 @@
+[![Codacy Badge](https://app.codacy.com/project/badge/Grade/ec1d9f614fdf4d5b8effa6b7b72b3d5e)](https://www.codacy.com/gh/antkeeper/antkeeper-source/dashboard?utm_source=github.com&utm_medium=referral&utm_content=antkeeper/antkeeper-source&utm_campaign=Badge_Grade)
+
 # Antkeeper Source
 
 Antkeeper is a 3D ant colony simulation game currently in development for Windows, Mac, and Linux. This repository contains all of the source code to Antkeeper.
diff --git a/src/engine/app/display-events.hpp b/src/engine/app/display-events.hpp
index 612ba8c..e299040 100644
--- a/src/engine/app/display-events.hpp
+++ b/src/engine/app/display-events.hpp
@@ -32,7 +32,7 @@ class display;
 struct display_connected_event
 {
 	/// Pointer to the display that has been connected.
-	const display* display;
+	const display* display{nullptr};
 };
 
 /**
@@ -41,7 +41,7 @@ struct display_connected_event
 struct display_disconnected_event
 {
 	/// Pointer to the display that has been disconnected.
-	const display* display;
+	const display* display{nullptr};
 };
 
 /**
@@ -50,10 +50,10 @@ struct display_disconnected_event
 struct display_orientation_changed_event
 {
 	/// Pointer to the display that has had it's orientation changed.
-	const display* display;
+	const display* display{nullptr};
 	
 	/// Orientation of the display.
-	display_orientation orientation;
+	display_orientation orientation{0};
 };
 
 } // namespace app
diff --git a/src/engine/app/display.hpp b/src/engine/app/display.hpp
index 8cb1a2a..c6d0e0e 100644
--- a/src/engine/app/display.hpp
+++ b/src/engine/app/display.hpp
@@ -172,14 +172,14 @@ private:
 	friend class window_manager;
 	friend class sdl_window_manager;
 	
-	int index;
+	int index{0};
 	std::string name;
-	geom::primitive::rectangle<int> bounds;
-	geom::primitive::rectangle<int> usable_bounds;
-	int refresh_rate;
-	float dpi;
-	display_orientation orientation;
-	bool connected;
+	geom::primitive::rectangle<int> bounds{0};
+	geom::primitive::rectangle<int> usable_bounds{0};
+	int refresh_rate{0};
+	float dpi{0.0f};
+	display_orientation orientation{0};
+	bool connected{false};
 	
 	event::publisher<display_connected_event> connected_publisher;
 	event::publisher<display_disconnected_event> disconnected_publisher;
diff --git a/src/engine/app/window-events.hpp b/src/engine/app/window-events.hpp
index be5af71..8074663 100644
--- a/src/engine/app/window-events.hpp
+++ b/src/engine/app/window-events.hpp
@@ -32,7 +32,7 @@ class window;
 struct window_closed_event
 {
 	/// Pointer to the window that has been requested to close.
-	window* window;
+	window* window{nullptr};
 };
 
 /**
@@ -41,10 +41,10 @@ struct window_closed_event
 struct window_focus_changed_event
 {
 	/// Pointer to the window that has gained or lost focus.
-	window* window;
+	window* window{nullptr};
 	
 	/// `true` if the window is in focus, `false` otherwise.
-	bool in_focus;
+	bool in_focus{false};
 };
 
 /**
@@ -53,10 +53,10 @@ struct window_focus_changed_event
 struct window_moved_event
 {
 	/// Pointer to the window that has been moved.
-	window* window;
+	window* window{nullptr};
 	
 	/// Position of the window, in display units.
-	math::vector<int, 2> position;
+	math::vector<int, 2> position{0, 0};
 };
 
 /**
@@ -65,7 +65,7 @@ struct window_moved_event
 struct window_maximized_event
 {
 	/// Pointer to the window that has been maximized.
-	window* window;
+	window* window{nullptr};
 };
 
 /**
@@ -74,7 +74,7 @@ struct window_maximized_event
 struct window_minimized_event
 {
 	/// Pointer to the window that has been minimized.
-	window* window;
+	window* window{nullptr};
 };
 
 /**
@@ -92,10 +92,10 @@ struct window_restored_event
 struct window_resized_event
 {
 	/// Pointer to the window that has been resized.
-	window* window;
+	window* window{nullptr};
 	
 	/// Window size, in display units.
-	math::vector<int, 2> size;
+	math::vector<int, 2> size{0, 0};
 };
 
 } // namespace app
diff --git a/src/engine/app/window.hpp b/src/engine/app/window.hpp
index da5c49f..4075616 100644
--- a/src/engine/app/window.hpp
+++ b/src/engine/app/window.hpp
@@ -36,16 +36,6 @@ class window_manager;
 class window
 {
 public:
-	/**
-	 * Constructs a window.
-	 */
-	window() = default;
-	
-	/**
-	 * Destructs a window.
-	 */
-	virtual ~window() = default;
-	
 	/**
 	 * Changes the title of the window.
 	 *
@@ -227,16 +217,16 @@ protected:
 	friend class window_manager;
 	
 	std::string title;
-	math::vector<int, 2> windowed_position;
-	math::vector<int, 2> position;
-	math::vector<int, 2> windowed_size;
-	math::vector<int, 2> size;
-	math::vector<int, 2> minimum_size;
-	math::vector<int, 2> maximum_size;
-	math::vector<int, 2> viewport_size;
-	bool maximized;
-	bool fullscreen;
-	bool v_sync;
+	math::vector<int, 2> windowed_position{0, 0};
+	math::vector<int, 2> position{0, 0};
+	math::vector<int, 2> windowed_size{0, 0};
+	math::vector<int, 2> size{0, 0};
+	math::vector<int, 2> minimum_size{0, 0};
+	math::vector<int, 2> maximum_size{0, 0};
+	math::vector<int, 2> viewport_size{0, 0};
+	bool maximized{false};
+	bool fullscreen{false};
+	bool v_sync{false};
 	
 	event::publisher<window_closed_event> closed_publisher;
 	event::publisher<window_focus_changed_event> focus_changed_publisher;
diff --git a/src/engine/gl/framebuffer.cpp b/src/engine/gl/framebuffer.cpp
index cf5fe56..98fb3f5 100644
--- a/src/engine/gl/framebuffer.cpp
+++ b/src/engine/gl/framebuffer.cpp
@@ -31,21 +31,13 @@ static constexpr GLenum attachment_lut[] =
 };
 
 framebuffer::framebuffer(int width, int height):
-	gl_framebuffer_id(0),
-	dimensions({width, height}),
-	color_attachment(nullptr),
-	depth_attachment(nullptr),
-	stencil_attachment(nullptr)
+	dimensions{width, height}
 {
 	glGenFramebuffers(1, &gl_framebuffer_id);
 }
 
 framebuffer::framebuffer():
-	gl_framebuffer_id(0),
-	dimensions({0, 0}),
-	color_attachment(nullptr),
-	depth_attachment(nullptr),
-	stencil_attachment(nullptr)
+	framebuffer(0, 0)
 {}
 
 framebuffer::~framebuffer()
diff --git a/src/engine/gl/framebuffer.hpp b/src/engine/gl/framebuffer.hpp
index 39ee243..691ce23 100644
--- a/src/engine/gl/framebuffer.hpp
+++ b/src/engine/gl/framebuffer.hpp
@@ -75,11 +75,11 @@ public:
 private:
 	friend class rasterizer;
 	
-	unsigned int gl_framebuffer_id;
-	std::array<int, 2> dimensions;
-	texture_2d* color_attachment;
-	texture_2d* depth_attachment;
-	texture_2d* stencil_attachment;
+	unsigned int gl_framebuffer_id{0};
+	std::array<int, 2> dimensions{0, 0};
+	texture_2d* color_attachment{nullptr};
+	texture_2d* depth_attachment{nullptr};
+	texture_2d* stencil_attachment{nullptr};
 };
 
 inline const std::array<int, 2>& framebuffer::get_dimensions() const
diff --git a/src/engine/gl/rasterizer.hpp b/src/engine/gl/rasterizer.hpp
index 6372a3d..547e767 100644
--- a/src/engine/gl/rasterizer.hpp
+++ b/src/engine/gl/rasterizer.hpp
@@ -129,9 +129,9 @@ public:
 
 private:
 	std::unique_ptr<framebuffer> default_framebuffer;
-	const framebuffer* bound_framebuffer;
-	const vertex_array* bound_vao;
-	const shader_program* bound_shader_program;
+	const framebuffer* bound_framebuffer{nullptr};
+	const vertex_array* bound_vao{nullptr};
+	const shader_program* bound_shader_program{nullptr};
 };
 
 } // namespace gl
diff --git a/src/engine/gl/shader-object.hpp b/src/engine/gl/shader-object.hpp
index 8144861..044c82b 100644
--- a/src/engine/gl/shader-object.hpp
+++ b/src/engine/gl/shader-object.hpp
@@ -99,7 +99,7 @@ private:
 	friend class shader_program;
 	
 	unsigned int gl_shader_id{0};
-	shader_stage m_stage;
+	shader_stage m_stage{0};
 	bool m_compiled{false};
 	std::string info_log;
 };
diff --git a/src/engine/gl/shader-variable.hpp b/src/engine/gl/shader-variable.hpp
index 5158a2d..e5dde56 100644
--- a/src/engine/gl/shader-variable.hpp
+++ b/src/engine/gl/shader-variable.hpp
@@ -39,11 +39,6 @@ class texture_cube;
 class shader_variable
 {
 public:
-	/**
-	 * Destructs a shader variable.
-	 */
-	virtual ~shader_variable() = default;
-	
 	/**
 	 * Returns the shader variable data type.
 	 */
@@ -187,7 +182,7 @@ protected:
 	explicit shader_variable(std::size_t size) noexcept;
 	
 private:
-	const std::size_t m_size;
+	const std::size_t m_size{0};
 };
 
 } // namespace gl
diff --git a/src/engine/gl/texture-cube.hpp b/src/engine/gl/texture-cube.hpp
index a95191c..5fc4d80 100644
--- a/src/engine/gl/texture-cube.hpp
+++ b/src/engine/gl/texture-cube.hpp
@@ -41,8 +41,8 @@ public:
 	/// Returns the linear size of a cube face, in pixels.
 	int get_face_size() const;
 	
-	unsigned int gl_texture_id;
-	int face_size;
+	unsigned int gl_texture_id{0};
+	int face_size{0};
 };
 
 inline int texture_cube::get_face_size() const
diff --git a/src/engine/gl/texture.hpp b/src/engine/gl/texture.hpp
index 9bc8f03..38f4bc9 100644
--- a/src/engine/gl/texture.hpp
+++ b/src/engine/gl/texture.hpp
@@ -153,15 +153,15 @@ private:
 	friend class gl_shader_texture_3d;
 	friend class gl_shader_texture_cube;
 	
-	unsigned int gl_texture_target;
-	unsigned int gl_texture_id;
-	std::array<std::uint16_t, 3> dimensions;
-	gl::pixel_type pixel_type;
-	gl::pixel_format pixel_format;
-	gl::color_space color_space;
+	unsigned int gl_texture_target{0};
+	unsigned int gl_texture_id{0};
+	std::array<std::uint16_t, 3> dimensions{0, 0, 0};
+	gl::pixel_type pixel_type{0};
+	gl::pixel_format pixel_format{0};
+	gl::color_space color_space{0};
 	std::array<texture_wrapping, 3> wrapping;
 	std::tuple<texture_min_filter, texture_mag_filter> filters;
-	float max_anisotropy;
+	float max_anisotropy{0.0f};
 };
 
 inline const std::array<std::uint16_t, 3>& texture::get_dimensions() const
diff --git a/src/engine/gl/vertex-attribute.hpp b/src/engine/gl/vertex-attribute.hpp
index 5c9673b..41db4bf 100644
--- a/src/engine/gl/vertex-attribute.hpp
+++ b/src/engine/gl/vertex-attribute.hpp
@@ -49,19 +49,19 @@ enum class vertex_attribute_type: std::uint8_t
 struct vertex_attribute
 {
 	/// Pointer to the vertex buffer containing vertex attribute data.
-	const vertex_buffer* buffer;
+	const vertex_buffer* buffer{nullptr};
 	
 	/// Offset to the first component of the first instance of this attribute in the vertex buffer, in bytes.
-	std::size_t offset;
+	std::size_t offset{0};
 	
 	/// Number of bytes between consecutive instances of this attribute in the vertex buffer. A value of `0` indicates attribute instances are tightly packed.
-	std::size_t stride;
+	std::size_t stride{0};
 	
 	/// Data type of each component in the attribute.
-	vertex_attribute_type type;
+	vertex_attribute_type type{0};
 	
 	/// Number of components per attribute instance. Supported values are `1`, `2`, `3`, and `4`.
-	std::uint8_t components;
+	std::uint8_t components{0};
 };
 
 } // namespace gl
diff --git a/src/engine/input/action-events.hpp b/src/engine/input/action-events.hpp
index a9860c9..8c2da93 100644
--- a/src/engine/input/action-events.hpp
+++ b/src/engine/input/action-events.hpp
@@ -30,7 +30,7 @@ class action;
 struct action_activated_event
 {
 	/// Control that was activated.
-	action* action;
+	action* action{nullptr};
 };
 
 /**
@@ -39,10 +39,10 @@ struct action_activated_event
 struct action_active_event
 {
 	/// Active action.
-	action* action;
+	action* action{nullptr};
 	
 	/// Control input value.
-	float input_value;
+	float input_value{0.0f};
 };
 
 /**
@@ -51,7 +51,7 @@ struct action_active_event
 struct action_deactivated_event
 {
 	/// Control that was deactivated.
-	action* action;
+	action* action{nullptr};
 };
 
 } // namespace input
diff --git a/src/engine/input/action-map.cpp b/src/engine/input/action-map.cpp
index 728df9e..329b6b2 100644
--- a/src/engine/input/action-map.cpp
+++ b/src/engine/input/action-map.cpp
@@ -25,11 +25,6 @@
 
 namespace input {
 
-action_map::action_map():
-	event_queue(nullptr),
-	enabled(false)
-{}
-
 void action_map::enable()
 {
 	if (!enabled)
diff --git a/src/engine/input/action-map.hpp b/src/engine/input/action-map.hpp
index 3e3b35f..b7cd9db 100644
--- a/src/engine/input/action-map.hpp
+++ b/src/engine/input/action-map.hpp
@@ -40,11 +40,6 @@ namespace input {
 class action_map
 {
 public:
-	/**
-	 * Constructs an action map.
-	 */
-	action_map();
-	
 	/**
 	 * Enables the mapping of input events to actions.
 	 */
@@ -154,8 +149,8 @@ private:
 	void handle_mouse_moved(const mouse_moved_event& event);
 	void handle_mouse_scrolled(const mouse_scrolled_event& event);
 	
-	event::queue* event_queue;
-	bool enabled;
+	event::queue* event_queue{nullptr};
+	bool enabled{false};
 	std::vector<std::shared_ptr<::event::subscription>> subscriptions;
 	std::vector<std::tuple<action*, gamepad_axis_mapping>> gamepad_axis_mappings;
 	std::vector<std::tuple<action*, gamepad_button_mapping>> gamepad_button_mappings;
diff --git a/src/engine/input/action.hpp b/src/engine/input/action.hpp
index bd6d836..83174f1 100644
--- a/src/engine/input/action.hpp
+++ b/src/engine/input/action.hpp
@@ -93,7 +93,7 @@ public:
 
 private:
 	threshold_function_type threshold_function;
-	bool active;
+	bool active{false};
 	
 	action_activated_event activated_event;
 	action_active_event active_event;
diff --git a/src/engine/input/device-events.hpp b/src/engine/input/device-events.hpp
index 15c2a1e..3c02988 100644
--- a/src/engine/input/device-events.hpp
+++ b/src/engine/input/device-events.hpp
@@ -30,7 +30,7 @@ class device;
 struct device_connected_event
 {
 	/// Device that was connected.
-	device* device;
+	device* device{nullptr};
 };
 
 /**
@@ -39,7 +39,7 @@ struct device_connected_event
 struct device_disconnected_event
 {
 	/// Device that was disconnected.
-	device* device;
+	device* device{nullptr};
 };
 
 } // namespace input
diff --git a/src/engine/input/device-type.hpp b/src/engine/input/device-type.hpp
index b7bc41b..893b842 100644
--- a/src/engine/input/device-type.hpp
+++ b/src/engine/input/device-type.hpp
@@ -20,10 +20,12 @@
 #ifndef ANTKEEPER_INPUT_DEVICE_TYPE_HPP
 #define ANTKEEPER_INPUT_DEVICE_TYPE_HPP
 
+#include <cstdint>
+
 namespace input {
 
 /// Input device types.
-enum class device_type
+enum class device_type: std::uint8_t
 {
 	/// Gamepad input device.
 	gamepad,
diff --git a/src/engine/input/device.cpp b/src/engine/input/device.cpp
index 0a50648..90878c1 100644
--- a/src/engine/input/device.cpp
+++ b/src/engine/input/device.cpp
@@ -21,10 +21,6 @@
 
 namespace input {
 
-device::device():
-	connected(true)
-{}
-
 void device::connect()
 {
 	connected = true;
diff --git a/src/engine/input/device.hpp b/src/engine/input/device.hpp
index 9bd8ca1..2779e14 100644
--- a/src/engine/input/device.hpp
+++ b/src/engine/input/device.hpp
@@ -35,12 +35,6 @@ namespace input {
 class device
 {
 public:
-	/// Constructs an input device.
-	device();
-	
-	/// Destructs an input device.
-	virtual ~device() = default;
-	
 	/**
 	 * Simulates the device being connected.
 	 */
@@ -89,7 +83,7 @@ public:
 	
 private:
 	::uuid uuid;
-	bool connected;
+	bool connected{false};
 	
 	::event::publisher<device_connected_event> connected_publisher;
 	::event::publisher<device_disconnected_event> disconnected_publisher;
diff --git a/src/engine/input/gamepad-events.hpp b/src/engine/input/gamepad-events.hpp
index 84c3ce0..b56cc31 100644
--- a/src/engine/input/gamepad-events.hpp
+++ b/src/engine/input/gamepad-events.hpp
@@ -33,10 +33,10 @@ class gamepad;
 struct gamepad_button_pressed_event
 {
 	/// Gamepad that generated the event.
-	gamepad* gamepad;
+	gamepad* gamepad{nullptr};
 	
 	/// Gamepad button being pressed.
-	gamepad_button button;
+	gamepad_button button{0};
 };
 
 /**
@@ -45,10 +45,10 @@ struct gamepad_button_pressed_event
 struct gamepad_button_released_event
 {
 	/// Gamepad that generated the event.
-	gamepad* gamepad;
+	gamepad* gamepad{nullptr};
 	
 	/// Gamepad button being released.
-	gamepad_button button;
+	gamepad_button button{0};
 };
 
 /**
@@ -57,13 +57,13 @@ struct gamepad_button_released_event
 struct gamepad_axis_moved_event
 {
 	/// Gamepad that generated the event.
-	gamepad* gamepad;
+	gamepad* gamepad{nullptr};
 	
 	/// Gamepad axis being moved.
-	gamepad_axis axis;
+	gamepad_axis axis{0};
 	
 	/// Position of the gamepad axis, on `[-1, 1]`.
-	float position;
+	float position{0.0f};
 };
 
 } // namespace input
diff --git a/src/engine/input/gamepad.cpp b/src/engine/input/gamepad.cpp
index 7084c1b..619a8e3 100644
--- a/src/engine/input/gamepad.cpp
+++ b/src/engine/input/gamepad.cpp
@@ -25,11 +25,7 @@
 
 namespace input {
 
-gamepad::gamepad():
-	left_deadzone_cross(true),
-	right_deadzone_cross(true),
-	left_deadzone_roundness(0.0f),
-	right_deadzone_roundness(0.0f)
+gamepad::gamepad()
 {
 	for (int i = 0; i < 6; ++i)
 	{
diff --git a/src/engine/input/gamepad.hpp b/src/engine/input/gamepad.hpp
index 1b64670..a045664 100644
--- a/src/engine/input/gamepad.hpp
+++ b/src/engine/input/gamepad.hpp
@@ -25,11 +25,12 @@
 #include <engine/input/gamepad-axis.hpp>
 #include <engine/input/gamepad-button.hpp>
 #include <engine/event/publisher.hpp>
+#include <cstdint>
 
 namespace input {
 
 /// Gamepad axis activation response curves.
-enum class gamepad_response_curve
+enum class gamepad_response_curve: std::uint8_t
 {
 	/// Linear response curve.
 	linear,
@@ -52,9 +53,6 @@ public:
 	 */
 	gamepad();
 	
-	/// Destructs a gamepad input device.
-	virtual ~gamepad() = default;
-	
 	/**
 	 * Sets the activation threshold for a gamepad axis.
 	 *
@@ -141,7 +139,7 @@ public:
 	}
 	
 	/// Returns device_type::gamepad.
-	[[nodiscard]] inline virtual constexpr device_type get_device_type() const noexcept
+	[[nodiscard]] inline constexpr device_type get_device_type() const noexcept override
 	{
 		return device_type::gamepad;
 	}
@@ -155,10 +153,10 @@ private:
 	float axis_activation_min[6];
 	float axis_activation_max[6];
 	gamepad_response_curve axis_response_curves[6];
-	bool left_deadzone_cross;
-	bool right_deadzone_cross;
-	float left_deadzone_roundness;
-	float right_deadzone_roundness;
+	bool left_deadzone_cross{true};
+	bool right_deadzone_cross{true};
+	float left_deadzone_roundness{0.0f};
+	float right_deadzone_roundness{0.0f};
 	
 	::event::publisher<gamepad_button_pressed_event> button_pressed_publisher;
 	::event::publisher<gamepad_button_released_event> button_released_publisher;
diff --git a/src/engine/input/keyboard-events.hpp b/src/engine/input/keyboard-events.hpp
index bddafc8..5bd39a2 100644
--- a/src/engine/input/keyboard-events.hpp
+++ b/src/engine/input/keyboard-events.hpp
@@ -34,16 +34,16 @@ class keyboard;
 struct key_pressed_event
 {
 	/// Keyboard that generated the event.
-	keyboard* keyboard;
+	keyboard* keyboard{nullptr};
 	
 	/// Scancode of the key being pressed.
-	scancode scancode;
+	scancode scancode{0};
 	
 	/// Bit mask containing the active modifier keys.
-	std::uint16_t modifiers;
+	std::uint16_t modifiers{0};
 	
 	/// `true` if the key press was generated by a key repeat, `false` otherwise.
-	bool repeat;
+	bool repeat{false};
 };
 
 /**
@@ -52,13 +52,13 @@ struct key_pressed_event
 struct key_released_event
 {
 	/// Keyboard that generated the event.
-	keyboard* keyboard;
+	keyboard* keyboard{nullptr};
 	
 	/// Scancode of the key being released.
-	scancode scancode;
+	scancode scancode{0};
 	
 	/// Bit mask containing the active modifier keys.
-	std::uint16_t modifiers;
+	std::uint16_t modifiers{0};
 };
 
 } // namespace input
diff --git a/src/engine/input/keyboard.hpp b/src/engine/input/keyboard.hpp
index cbf28ff..c33bf8c 100644
--- a/src/engine/input/keyboard.hpp
+++ b/src/engine/input/keyboard.hpp
@@ -34,14 +34,6 @@ namespace input {
 class keyboard: public device
 {
 public:
-	/**
-	 * Constructs a keyboard input device.
-	 */
-	keyboard() = default;
-	
-	/// Destructs a keyboard input device.
-	virtual ~keyboard() = default;
-	
 	/**
 	 * Simulates a key press.
 	 *
@@ -72,7 +64,7 @@ public:
 	}
 	
 	/// Returns device_type::keyboard.
-	[[nodiscard]] inline virtual constexpr device_type get_device_type() const noexcept
+	[[nodiscard]] inline constexpr device_type get_device_type() const noexcept override
 	{
 		return device_type::keyboard;
 	}
diff --git a/src/engine/input/mapping.cpp b/src/engine/input/mapping.cpp
index 03302dd..d3f635b 100644
--- a/src/engine/input/mapping.cpp
+++ b/src/engine/input/mapping.cpp
@@ -26,38 +26,38 @@
 namespace input {
 
 gamepad_axis_mapping::gamepad_axis_mapping(input::gamepad* gamepad, gamepad_axis axis, bool direction):
-	gamepad(gamepad),
-	axis(axis),
-	direction(direction)
+	gamepad{gamepad},
+	axis{axis},
+	direction{direction}
 {}
 
 gamepad_button_mapping::gamepad_button_mapping(input::gamepad* gamepad, gamepad_button button):
-	gamepad(gamepad),
-	button(button)
+	gamepad{gamepad},
+	button{button}
 {}
 
 key_mapping::key_mapping(input::keyboard* keyboard, input::scancode scancode, std::uint16_t modifiers, bool repeat):
-	keyboard(keyboard),
-	scancode(scancode),
-	repeat(repeat),
-	modifiers(modifiers)
+	keyboard{keyboard},
+	scancode{scancode},
+	repeat{repeat},
+	modifiers{modifiers}
 {}
 
 mouse_button_mapping::mouse_button_mapping(input::mouse* mouse, mouse_button button):
-	mouse(mouse),
-	button(button)
+	mouse{mouse},
+	button{button}
 {}
 
 mouse_motion_mapping::mouse_motion_mapping(input::mouse* mouse, mouse_motion_axis axis, bool direction):
-	mouse(mouse),
-	axis(axis),
-	direction(direction)
+	mouse{mouse},
+	axis{axis},
+	direction{direction}
 {}
 
 mouse_scroll_mapping::mouse_scroll_mapping(input::mouse* mouse, mouse_scroll_axis axis, bool direction):
-	mouse(mouse),
-	axis(axis),
-	direction(direction)
+	mouse{mouse},
+	axis{axis},
+	direction{direction}
 {}
 
 } // namespace input
diff --git a/src/engine/input/mapping.hpp b/src/engine/input/mapping.hpp
index 03df301..4541a9b 100644
--- a/src/engine/input/mapping.hpp
+++ b/src/engine/input/mapping.hpp
@@ -72,23 +72,20 @@ public:
 	gamepad_axis_mapping() = default;
 	/// @}
 	
-	/// Destructs a gamepad axis mapping.
-	virtual ~gamepad_axis_mapping() = default;
-	
 	/// Returns mapping_type::gamepad_axis.
-	[[nodiscard]] inline virtual constexpr mapping_type get_mapping_type() const noexcept
+	[[nodiscard]] inline constexpr mapping_type get_mapping_type() const noexcept override
 	{
 		return mapping_type::gamepad_axis;
 	}
 	
 	/// Pointer to the mapped gamepad, or `nullptr` if input from any gamepad is accepted.
-	input::gamepad* gamepad;
+	input::gamepad* gamepad{nullptr};
 	
 	/// Mapped gamepad axis.
-	gamepad_axis axis;
+	gamepad_axis axis{0};
 	
 	/// Sign bit of the mapped direction.
-	bool direction;
+	bool direction{false};
 };
 
 /**
@@ -108,20 +105,17 @@ public:
 	gamepad_button_mapping() = default;
 	/// @}
 	
-	/// Destructs a gamepad button mapping.
-	virtual ~gamepad_button_mapping() = default;
-	
 	/// Returns mapping_type::gamepad_button.
-	[[nodiscard]] inline virtual constexpr mapping_type get_mapping_type() const noexcept
+	[[nodiscard]] inline constexpr mapping_type get_mapping_type() const noexcept override
 	{
 		return mapping_type::gamepad_button;
 	}
 	
 	/// Pointer to the mapped gamepad, or `nullptr` if input from any gamepad is accepted.
-	input::gamepad* gamepad;
+	input::gamepad* gamepad{nullptr};
 	
 	/// Mapped gamepad button.
-	gamepad_button button;
+	gamepad_button button{0};
 };
 
 /**
@@ -143,26 +137,23 @@ public:
 	key_mapping() = default;
 	/// @}
 	
-	/// Destructs a keyboard key mapping.
-	virtual ~key_mapping() = default;
-	
 	/// Returns mapping_type::key.
-	[[nodiscard]] inline virtual constexpr mapping_type get_mapping_type() const noexcept
+	[[nodiscard]] inline constexpr mapping_type get_mapping_type() const noexcept override
 	{
 		return mapping_type::key;
 	}
 	
 	/// Pointer to the mapped keyboard, or `nullptr` if input from any keyboard is accepted.
-	input::keyboard* keyboard;
+	input::keyboard* keyboard{nullptr};
 	
 	/// Scancode of the mapped key.
-	scancode scancode;
+	scancode scancode{0};
 	
 	/// Modifier keys bitbask.
-	std::uint16_t modifiers;
+	std::uint16_t modifiers{0};
 	
 	/// `false` if the mapping ignores key repeats, `true` otherwise.
-	bool repeat;
+	bool repeat{false};
 };
 
 /**
@@ -182,20 +173,17 @@ public:
 	mouse_button_mapping() = default;
 	/// @}
 	
-	/// Destructs a mouse button mapping.
-	virtual ~mouse_button_mapping() = default;
-	
 	/// Returns mapping_type::mouse_button.
-	[[nodiscard]] inline virtual constexpr mapping_type get_mapping_type() const noexcept
+	[[nodiscard]] inline constexpr mapping_type get_mapping_type() const noexcept override
 	{
 		return mapping_type::mouse_button;
 	}
 	
 	/// Pointer to the mapped mouse, or `nullptr` if input from any mouse is accepted.
-	input::mouse* mouse;
+	input::mouse* mouse{nullptr};
 	
 	/// Mapped mouse button.
-	mouse_button button;
+	mouse_button button{0};
 };
 
 /**
@@ -216,23 +204,20 @@ public:
 	mouse_motion_mapping() = default;
 	/// @}
 	
-	/// Destructs a mouse motion mapping.
-	virtual ~mouse_motion_mapping() = default;
-	
 	/// Returns mapping_type::mouse_motion.
-	[[nodiscard]] inline virtual constexpr mapping_type get_mapping_type() const noexcept
+	[[nodiscard]] inline constexpr mapping_type get_mapping_type() const noexcept override
 	{
 		return mapping_type::mouse_motion;
 	}
 	
 	/// Pointer to the mapped mouse, or `nullptr` if input from any mouse is accepted.
-	input::mouse* mouse;
+	input::mouse* mouse{nullptr};
 	
 	/// Mapped mouse motion axis.
-	mouse_motion_axis axis;
+	mouse_motion_axis axis{0};
 	
 	/// Sign bit of the mapped direction.
-	bool direction;
+	bool direction{false};
 };
 
 /**
@@ -254,23 +239,20 @@ public:
 	mouse_scroll_mapping() = default;
 	/// @}
 	
-	/// Destructs a mouse scroll mapping.
-	virtual ~mouse_scroll_mapping() = default;
-	
 	/// Returns mapping_type::mouse_scroll.
-	[[nodiscard]] inline virtual constexpr mapping_type get_mapping_type() const noexcept
+	[[nodiscard]] inline constexpr mapping_type get_mapping_type() const noexcept override
 	{
 		return mapping_type::mouse_scroll;
 	}
 	
 	/// Pointer to the mapped mouse, or `nullptr` if input from any mouse is accepted.
-	input::mouse* mouse;
+	input::mouse* mouse{nullptr};
 	
 	/// Mapped mouse scroll axis.
-	mouse_scroll_axis axis;
+	mouse_scroll_axis axis{0};
 	
 	/// Sign bit of the mapped direction.
-	bool direction;
+	bool direction{false};
 };
 
 } // namespace input
diff --git a/src/engine/input/mouse-events.hpp b/src/engine/input/mouse-events.hpp
index 7d29271..a0aecad 100644
--- a/src/engine/input/mouse-events.hpp
+++ b/src/engine/input/mouse-events.hpp
@@ -36,13 +36,13 @@ class mouse;
 struct mouse_moved_event
 {
 	/// Mouse that generated the event.
-	mouse* mouse;
+	mouse* mouse{nullptr};
 	
 	/// Mouse position, in pixels, relative to the window.
-	math::vector<std::int32_t, 2> position;
+	math::vector<std::int32_t, 2> position{0, 0};
 	
 	/// Relative movement of the mouse, in pixels.
-	math::vector<std::int32_t, 2> difference;
+	math::vector<std::int32_t, 2> difference{0, 0};
 };
 
 /**
@@ -51,13 +51,13 @@ struct mouse_moved_event
 struct mouse_button_pressed_event
 {
 	/// Mouse that generated the event.
-	mouse* mouse;
+	mouse* mouse{nullptr};
 	
 	/// Mouse position, in pixels, relative to the window, when the button was pressed.
-	math::vector<std::int32_t, 2> position;
+	math::vector<std::int32_t, 2> position{0, 0};
 	
 	/// Mouse button being pressed.
-	mouse_button button;
+	mouse_button button{0};
 };
 
 /**
@@ -66,13 +66,13 @@ struct mouse_button_pressed_event
 struct mouse_button_released_event
 {
 	/// Mouse that generated the event.
-	mouse* mouse;
+	mouse* mouse{nullptr};
 	
 	/// Mouse position, in pixels, relative to the window, when the button was released.
-	math::vector<std::int32_t, 2> position;
+	math::vector<std::int32_t, 2> position{0, 0};
 	
 	/// Mouse button being released.
-	mouse_button button;
+	mouse_button button{0};
 };
 
 /**
@@ -81,13 +81,13 @@ struct mouse_button_released_event
 struct mouse_scrolled_event
 {
 	/// Mouse that generated the event.
-	mouse* mouse;
+	mouse* mouse{nullptr};
 	
 	/// Mouse position, in pixels, relative to the window, when the mouse was scrolled.
-	math::vector<std::int32_t, 2> position;
+	math::vector<std::int32_t, 2> position{0, 0};
 	
 	/// Scroll velocity.
-	math::vector<float, 2> velocity;
+	math::vector<float, 2> velocity{0.0f, 0.0f};
 };
 
 } // namespace input
diff --git a/src/engine/input/mouse.hpp b/src/engine/input/mouse.hpp
index 9371cb8..cbeffdb 100644
--- a/src/engine/input/mouse.hpp
+++ b/src/engine/input/mouse.hpp
@@ -35,14 +35,6 @@ namespace input {
 class mouse: public device
 {
 public:
-	/**
-	 * Constructs a mouse input device.
-	 */
-	mouse() = default;
-	
-	/// Destructs a mouse input device.
-	virtual ~mouse() = default;
-	
 	/**
 	 * Simulates a mouse button press.
 	 *
@@ -103,13 +95,13 @@ public:
 	}
 	
 	/// Returns device_type::mouse.
-	[[nodiscard]] inline virtual constexpr device_type get_device_type() const noexcept
+	[[nodiscard]] inline constexpr device_type get_device_type() const noexcept override
 	{
 		return device_type::mouse;
 	}
 	
 private:
-	math::vector<std::int32_t, 2> position;
+	math::vector<std::int32_t, 2> position{0, 0};
 	
 	::event::publisher<mouse_button_pressed_event> button_pressed_publisher;
 	::event::publisher<mouse_button_released_event> button_released_publisher;
diff --git a/src/engine/utility/hash/fnv1a.hpp b/src/engine/utility/hash/fnv1a.hpp
index ddebc2c..b2e1245 100644
--- a/src/engine/utility/hash/fnv1a.hpp
+++ b/src/engine/utility/hash/fnv1a.hpp
@@ -164,7 +164,7 @@ struct fnv1a32_t
 	}
 	
 	/// 32-bit FNV-1a hash value.
-	value_type value;
+	value_type value{0};
 };
 static_assert(sizeof(fnv1a32_t) == sizeof(std::uint32_t));
 
@@ -220,7 +220,7 @@ struct fnv1a64_t
 	}
 	
 	/// 64-bit FNV-1a hash value.
-	value_type value;
+	value_type value{0};
 };
 static_assert(sizeof(fnv1a64_t) == sizeof(std::uint64_t));
 
diff --git a/src/engine/utility/uuid.hpp b/src/engine/utility/uuid.hpp
index af7ba50..06d1a0d 100644
--- a/src/engine/utility/uuid.hpp
+++ b/src/engine/utility/uuid.hpp
@@ -34,7 +34,7 @@ struct uuid
 	[[nodiscard]] std::string string() const;
 	
 	/// UUID data.
-	std::array<std::byte, 16> data;
+	std::array<std::byte, 16> data{};
 };
 
 /**