Shuffle stuff around

- Use the new and improved hierarchy I figured out when making Prospero chat
- Re-add NSIS scripts, again from Prospero
- Update most build and utility scripts with their most recent versions

15 files changed, 877 insertions, 0 deletions

diff --git a/src/game/client/entity/CMakeLists.txt b/src/game/client/entity/CMakeLists.txt
new file mode 100644
index 0000000..4da10d6
--- /dev/null
+++ b/src/game/client/entity/CMakeLists.txt
@@ -0,0 +1,15 @@
+target_sources(vclient PRIVATE
+    "${CMAKE_CURRENT_LIST_DIR}/camera.cc"
+    "${CMAKE_CURRENT_LIST_DIR}/camera.hh"
+    "${CMAKE_CURRENT_LIST_DIR}/factory.cc"
+    "${CMAKE_CURRENT_LIST_DIR}/factory.hh"
+    "${CMAKE_CURRENT_LIST_DIR}/interpolation.cc"
+    "${CMAKE_CURRENT_LIST_DIR}/interpolation.hh"
+    "${CMAKE_CURRENT_LIST_DIR}/listener.cc"
+    "${CMAKE_CURRENT_LIST_DIR}/listener.hh"
+    "${CMAKE_CURRENT_LIST_DIR}/player_look.cc"
+    "${CMAKE_CURRENT_LIST_DIR}/player_look.hh"
+    "${CMAKE_CURRENT_LIST_DIR}/player_move.cc"
+    "${CMAKE_CURRENT_LIST_DIR}/player_move.hh"
+    "${CMAKE_CURRENT_LIST_DIR}/sound_emitter.cc"
+    "${CMAKE_CURRENT_LIST_DIR}/sound_emitter.hh")
diff --git a/src/game/client/entity/camera.cc b/src/game/client/entity/camera.cc
new file mode 100644
index 0000000..3badd9d
--- /dev/null
+++ b/src/game/client/entity/camera.cc
@@ -0,0 +1,114 @@
+#include "client/pch.hh"
+
+#include "client/entity/camera.hh"
+
+#include "core/config/number.hh"
+
+#include "core/io/config_map.hh"
+
+#include "core/math/angles.hh"
+
+#include "shared/entity/head.hh"
+#include "shared/entity/transform.hh"
+#include "shared/entity/velocity.hh"
+
+#include "shared/world/dimension.hh"
+
+#include "client/entity/player_move.hh"
+
+#include "client/gui/settings.hh"
+
+#include "client/const.hh"
+#include "client/globals.hh"
+#include "client/session.hh"
+#include "client/toggles.hh"
+
+config::Float entity::camera::roll_angle(2.0f, 0.0f, 4.0f);
+config::Float entity::camera::vertical_fov(90.0f, 45.0f, 110.0f);
+config::Unsigned entity::camera::view_distance(16U, 4U, 32U);
+
+glm::fvec3 entity::camera::angles;
+glm::fvec3 entity::camera::direction;
+glm::fmat4x4 entity::camera::matrix;
+chunk_pos entity::camera::position_chunk;
+glm::fvec3 entity::camera::position_local;
+
+static void reset_camera(void)
+{
+    entity::camera::angles = glm::fvec3(0.0f, 0.0f, 0.0f);
+    entity::camera::direction = DIR_FORWARD<float>;
+    entity::camera::matrix = glm::identity<glm::fmat4x4>();
+    entity::camera::position_chunk = chunk_pos(0, 0, 0);
+    entity::camera::position_local = glm::fvec3(0.0f, 0.0f, 0.0f);
+}
+
+// Gracefully contributed by PQCraft himself in 2024
+// making PlatinumSrc and Voxelius kind of related to each other
+static glm::fmat4x4 platinumsrc_viewmatrix(const glm::fvec3& position, const glm::fvec3& angles)
+{
+    glm::fvec3 forward, up;
+    math::vectors(angles, &forward, nullptr, &up);
+
+    auto result = glm::identity<glm::fmat4x4>();
+    result[0][0] = forward.y * up.z - forward.z * up.y;
+    result[1][0] = forward.z * up.x - forward.x * up.z;
+    result[2][0] = forward.x * up.y - forward.y * up.x;
+    result[3][0] = -result[0][0] * position.x - result[1][0] * position.y - result[2][0] * position.z;
+    result[0][1] = up.x;
+    result[1][1] = up.y;
+    result[2][1] = up.z;
+    result[3][1] = -up.x * position.x - up.y * position.y - up.z * position.z;
+    result[0][2] = -forward.x;
+    result[1][2] = -forward.y;
+    result[2][2] = -forward.z;
+    result[3][2] = forward.x * position.x + forward.y * position.y + forward.z * position.z;
+    return result;
+}
+
+void entity::camera::init(void)
+{
+    globals::client_config.add_value("camera.roll_angle", entity::camera::roll_angle);
+    globals::client_config.add_value("camera.vertical_fov", entity::camera::vertical_fov);
+    globals::client_config.add_value("camera.view_distance", entity::camera::view_distance);
+
+    settings::add_slider(1, entity::camera::vertical_fov, settings_location::GENERAL, "camera.vertical_fov", true, "%.0f");
+    settings::add_slider(0, entity::camera::view_distance, settings_location::VIDEO, "camera.view_distance", false);
+    settings::add_slider(10, entity::camera::roll_angle, settings_location::VIDEO, "camera.roll_angle", true, "%.01f");
+
+    reset_camera();
+}
+
+void entity::camera::update(void)
+{
+    if(!session::is_ingame()) {
+        reset_camera();
+        return;
+    }
+
+    const auto& head = globals::dimension->entities.get<entity::client::HeadIntr>(globals::player);
+    const auto& transform = globals::dimension->entities.get<entity::client::TransformIntr>(globals::player);
+    const auto& velocity = globals::dimension->entities.get<entity::Velocity>(globals::player);
+
+    entity::camera::angles = transform.angles + head.angles;
+    entity::camera::position_chunk = transform.chunk;
+    entity::camera::position_local = transform.local + head.offset;
+
+    glm::fvec3 right_vector, up_vector;
+    math::vectors(entity::camera::angles, &entity::camera::direction, &right_vector, &up_vector);
+
+    auto client_angles = entity::camera::angles;
+
+    if(!toggles::get(TOGGLE_PM_FLIGHT)) {
+        // Apply the quake-like view rolling
+        client_angles[2] = math::radians(-entity::camera::roll_angle.get_value()
+            * glm::dot(velocity.value / PMOVE_MAX_SPEED_GROUND, right_vector));
+    }
+
+    const auto z_near = 0.01f;
+    const auto z_far = 1.25f * static_cast<float>(CHUNK_SIZE * entity::camera::view_distance.get_value());
+
+    auto proj = glm::perspective(math::radians(entity::camera::vertical_fov.get_value()), globals::aspect, z_near, z_far);
+    auto view = platinumsrc_viewmatrix(entity::camera::position_local, client_angles);
+
+    entity::camera::matrix = proj * view;
+}
diff --git a/src/game/client/entity/camera.hh b/src/game/client/entity/camera.hh
new file mode 100644
index 0000000..67baf72
--- /dev/null
+++ b/src/game/client/entity/camera.hh
@@ -0,0 +1,31 @@
+#pragma once
+
+#include "shared/types.hh"
+
+namespace config
+{
+class Float;
+class Unsigned;
+} // namespace config
+
+namespace entity::camera
+{
+extern config::Float roll_angle;
+extern config::Float vertical_fov;
+extern config::Unsigned view_distance;
+} // namespace entity::camera
+
+namespace entity::camera
+{
+extern glm::fvec3 angles;
+extern glm::fvec3 direction;
+extern glm::fmat4x4 matrix;
+extern chunk_pos position_chunk;
+extern glm::fvec3 position_local;
+} // namespace entity::camera
+
+namespace entity::camera
+{
+void init(void);
+void update(void);
+} // namespace entity::camera
diff --git a/src/game/client/entity/factory.cc b/src/game/client/entity/factory.cc
new file mode 100644
index 0000000..f6f6079
--- /dev/null
+++ b/src/game/client/entity/factory.cc
@@ -0,0 +1,30 @@
+#include "client/pch.hh"
+
+#include "client/entity/factory.hh"
+
+#include "shared/entity/factory.hh"
+#include "shared/entity/head.hh"
+#include "shared/entity/transform.hh"
+
+#include "shared/world/dimension.hh"
+
+#include "client/entity/sound_emitter.hh"
+
+#include "client/globals.hh"
+
+void entity::client::create_player(world::Dimension* dimension, entt::entity entity)
+{
+    entity::shared::create_player(dimension, entity);
+
+    const auto& head = dimension->entities.get<entity::Head>(entity);
+    dimension->entities.emplace_or_replace<entity::client::HeadIntr>(entity, head);
+    dimension->entities.emplace_or_replace<entity::client::HeadPrev>(entity, head);
+
+    const auto& transform = dimension->entities.get<entity::Transform>(entity);
+    dimension->entities.emplace_or_replace<entity::client::TransformIntr>(entity, transform);
+    dimension->entities.emplace_or_replace<entity::client::TransformPrev>(entity, transform);
+
+    if(globals::sound_ctx) {
+        dimension->entities.emplace_or_replace<entity::SoundEmitter>(entity);
+    }
+}
diff --git a/src/game/client/entity/factory.hh b/src/game/client/entity/factory.hh
new file mode 100644
index 0000000..63e6e44
--- /dev/null
+++ b/src/game/client/entity/factory.hh
@@ -0,0 +1,11 @@
+#pragma once
+
+namespace world
+{
+class Dimension;
+} // namespace world
+
+namespace entity::client
+{
+void create_player(world::Dimension* dimension, entt::entity entity);
+} // namespace entity::client
diff --git a/src/game/client/entity/interpolation.cc b/src/game/client/entity/interpolation.cc
new file mode 100644
index 0000000..a9a3349
--- /dev/null
+++ b/src/game/client/entity/interpolation.cc
@@ -0,0 +1,64 @@
+#include "client/pch.hh"
+
+#include "client/entity/interpolation.hh"
+
+#include "core/math/constexpr.hh"
+
+#include "shared/entity/head.hh"
+#include "shared/entity/transform.hh"
+
+#include "shared/world/dimension.hh"
+
+#include "shared/coord.hh"
+
+#include "client/globals.hh"
+
+static void transform_interpolate(float alpha)
+{
+    auto group = globals::dimension->entities.group<entity::client::TransformIntr>(
+        entt::get<entity::Transform, entity::client::TransformPrev>);
+
+    for(auto [entity, interp, current, previous] : group.each()) {
+        interp.angles[0] = glm::mix(previous.angles[0], current.angles[0], alpha);
+        interp.angles[1] = glm::mix(previous.angles[1], current.angles[1], alpha);
+        interp.angles[2] = glm::mix(previous.angles[2], current.angles[2], alpha);
+
+        // Figure out previous chunk-local floating-point coordinates transformed
+        // to the current WorldCoord's chunk domain coordinates; we're interpolating
+        // against these instead of using previous.position.local to prevent jittering
+        auto previous_shift = coord::to_relative(current.chunk, current.local, previous.chunk, previous.local);
+        auto previous_local = current.local + previous_shift;
+
+        interp.chunk.x = current.chunk.x;
+        interp.chunk.y = current.chunk.y;
+        interp.chunk.z = current.chunk.z;
+
+        interp.local.x = glm::mix(previous_local.x, current.local.x, alpha);
+        interp.local.y = glm::mix(previous_local.y, current.local.y, alpha);
+        interp.local.z = glm::mix(previous_local.z, current.local.z, alpha);
+    }
+}
+
+static void head_interpolate(float alpha)
+{
+    auto group = globals::dimension->entities.group<entity::client::HeadIntr>(entt::get<entity::Head, entity::client::HeadPrev>);
+
+    for(auto [entity, interp, current, previous] : group.each()) {
+        interp.angles[0] = glm::mix(previous.angles[0], current.angles[0], alpha);
+        interp.angles[1] = glm::mix(previous.angles[1], current.angles[1], alpha);
+        interp.angles[2] = glm::mix(previous.angles[2], current.angles[2], alpha);
+
+        interp.offset.x = glm::mix(previous.offset.x, current.offset.x, alpha);
+        interp.offset.y = glm::mix(previous.offset.y, current.offset.y, alpha);
+        interp.offset.z = glm::mix(previous.offset.z, current.offset.z, alpha);
+    }
+}
+
+void entity::interpolation::update(void)
+{
+    if(globals::dimension) {
+        auto alpha = static_cast<float>(globals::fixed_accumulator) / static_cast<float>(globals::fixed_frametime_us);
+        transform_interpolate(alpha);
+        head_interpolate(alpha);
+    }
+}
\ No newline at end of file
diff --git a/src/game/client/entity/interpolation.hh b/src/game/client/entity/interpolation.hh
new file mode 100644
index 0000000..6935fe8
--- /dev/null
+++ b/src/game/client/entity/interpolation.hh
@@ -0,0 +1,6 @@
+#pragma once
+
+namespace entity::interpolation
+{
+void update(void);
+} // namespace entity::interpolation
diff --git a/src/game/client/entity/listener.cc b/src/game/client/entity/listener.cc
new file mode 100644
index 0000000..a79e8a5
--- /dev/null
+++ b/src/game/client/entity/listener.cc
@@ -0,0 +1,42 @@
+#include "client/pch.hh"
+
+#include "client/entity/listener.hh"
+
+#include "core/config/number.hh"
+
+#include "core/math/constexpr.hh"
+
+#include "shared/entity/velocity.hh"
+
+#include "shared/world/dimension.hh"
+
+#include "client/entity/camera.hh"
+
+#include "client/sound/sound.hh"
+
+#include "client/const.hh"
+#include "client/globals.hh"
+#include "client/session.hh"
+
+void entity::listener::update(void)
+{
+    if(session::is_ingame()) {
+        const auto& velocity = globals::dimension->entities.get<entity::Velocity>(globals::player).value;
+        const auto& position = entity::camera::position_local;
+
+        alListener3f(AL_POSITION, position.x, position.y, position.z);
+        alListener3f(AL_VELOCITY, velocity.x, velocity.y, velocity.z);
+
+        float orientation[6];
+        orientation[0] = entity::camera::direction.x;
+        orientation[1] = entity::camera::direction.y;
+        orientation[2] = entity::camera::direction.z;
+        orientation[3] = DIR_UP<float>.x;
+        orientation[4] = DIR_UP<float>.y;
+        orientation[5] = DIR_UP<float>.z;
+
+        alListenerfv(AL_ORIENTATION, orientation);
+    }
+
+    alListenerf(AL_GAIN, glm::clamp(sound::volume_master.get_value() * 0.01f, 0.0f, 1.0f));
+}
diff --git a/src/game/client/entity/listener.hh b/src/game/client/entity/listener.hh
new file mode 100644
index 0000000..594cde1
--- /dev/null
+++ b/src/game/client/entity/listener.hh
@@ -0,0 +1,6 @@
+#pragma once
+
+namespace entity::listener
+{
+void update(void);
+} // namespace entity::listener
diff --git a/src/game/client/entity/player_look.cc b/src/game/client/entity/player_look.cc
new file mode 100644
index 0000000..0752e78
--- /dev/null
+++ b/src/game/client/entity/player_look.cc
@@ -0,0 +1,155 @@
+#include "client/pch.hh"
+
+#include "client/entity/player_look.hh"
+
+#include "core/config/boolean.hh"
+#include "core/config/number.hh"
+
+#include "core/io/config_map.hh"
+
+#include "core/math/angles.hh"
+
+#include "shared/entity/head.hh"
+
+#include "shared/world/dimension.hh"
+
+#include "client/config/gamepad_axis.hh"
+#include "client/config/gamepad_button.hh"
+#include "client/config/keybind.hh"
+
+#include "client/gui/settings.hh"
+
+#include "client/io/gamepad.hh"
+#include "client/io/glfw.hh"
+
+#include "client/const.hh"
+#include "client/globals.hh"
+#include "client/session.hh"
+
+constexpr static float PITCH_MIN = -1.0f * math::radians(90.0f);
+constexpr static float PITCH_MAX = +1.0f * math::radians(90.0f);
+
+// Mouse options
+static config::Boolean mouse_raw_input(true);
+static config::Unsigned mouse_sensitivity(25U, 1U, 100U);
+
+// Gamepad options
+static config::Float gamepad_fastlook_factor(1.5f, 1.0f, 5.0f);
+static config::Unsigned gamepad_accel_pitch(15U, 1U, 100U);
+static config::Unsigned gamepad_accel_yaw(25U, 1U, 100U);
+
+// Gamepad axes
+static config::GamepadAxis axis_pitch(GLFW_GAMEPAD_AXIS_LEFT_Y, false);
+static config::GamepadAxis axis_yaw(GLFW_GAMEPAD_AXIS_LEFT_X, false);
+
+// Gamepad buttons
+static config::GamepadButton button_fastlook(GLFW_GAMEPAD_BUTTON_LEFT_THUMB);
+
+static bool fastlook_enabled;
+static glm::fvec2 last_cursor;
+
+static void add_angles(float pitch, float yaw)
+{
+    if(session::is_ingame()) {
+        auto& head = globals::dimension->entities.get<entity::Head>(globals::player);
+
+        head.angles[0] += pitch;
+        head.angles[1] += yaw;
+        head.angles[0] = glm::clamp(head.angles[0], PITCH_MIN, PITCH_MAX);
+        head.angles = math::wrap_180(head.angles);
+
+        // Client-side head angles are not interpolated;
+        // Re-assigning the previous state after the current
+        // state has been already modified is certainly a way
+        // to circumvent the interpolation applied to anything with a head
+        globals::dimension->entities.emplace_or_replace<entity::client::HeadPrev>(globals::player, head);
+    }
+}
+
+static void on_glfw_cursor_pos(const io::GlfwCursorPosEvent& event)
+{
+    if(io::gamepad::available && io::gamepad::active.get_value()) {
+        // The player is assumed to be using
+        // a gamepad instead of mouse and keyboard
+        last_cursor = event.pos;
+        return;
+    }
+
+    if(globals::gui_screen || !session::is_ingame()) {
+        // UI is visible or we're not in-game
+        last_cursor = event.pos;
+        return;
+    }
+
+    auto dx = -0.01f * static_cast<float>(mouse_sensitivity.get_value()) * math::radians(event.pos.x - last_cursor.x);
+    auto dy = -0.01f * static_cast<float>(mouse_sensitivity.get_value()) * math::radians(event.pos.y - last_cursor.y);
+    add_angles(dy, dx);
+
+    last_cursor = event.pos;
+}
+
+static void on_gamepad_button(const io::GamepadButtonEvent& event)
+{
+    if(button_fastlook.equals(event.button)) {
+        fastlook_enabled = event.action == GLFW_PRESS;
+    }
+}
+
+void entity::player_look::init(void)
+{
+    globals::client_config.add_value("player_look.mouse.raw_input", mouse_raw_input);
+    globals::client_config.add_value("player_look.mouse.sensitivity", mouse_sensitivity);
+    globals::client_config.add_value("player_look.gamepad.fastlook_factor", gamepad_fastlook_factor);
+    globals::client_config.add_value("player_look.gamepad.accel_pitch", gamepad_accel_pitch);
+    globals::client_config.add_value("player_look.gamepad.accel_yaw", gamepad_accel_yaw);
+    globals::client_config.add_value("player_look.gp_axis.pitch", axis_pitch);
+    globals::client_config.add_value("player_look.gp_axis.yaw", axis_yaw);
+    globals::client_config.add_value("player_look.gp_button.fastlook", button_fastlook);
+
+    settings::add_slider(0, mouse_sensitivity, settings_location::MOUSE, "player_look.mouse.sensitivity", true);
+    settings::add_checkbox(1, mouse_raw_input, settings_location::MOUSE, "player_look.mouse.raw_input", true);
+
+    settings::add_slider(0, gamepad_accel_pitch, settings_location::GAMEPAD_GAMEPLAY, "player_look.gamepad.accel_pitch", false);
+    settings::add_slider(1, gamepad_accel_yaw, settings_location::GAMEPAD_GAMEPLAY, "player_look.gamepad.accel_yaw", false);
+    settings::add_gamepad_axis(2, axis_pitch, settings_location::GAMEPAD_GAMEPLAY, "player_look.gp_axis.pitch");
+    settings::add_gamepad_axis(3, axis_yaw, settings_location::GAMEPAD_GAMEPLAY, "player_look.gp_axis.yaw");
+    settings::add_slider(4, gamepad_fastlook_factor, settings_location::GAMEPAD_GAMEPLAY, "player_look.gamepad.fastlook_factor", true,
+        "%.02f");
+    settings::add_gamepad_button(5, button_fastlook, settings_location::GAMEPAD_GAMEPLAY, "player_look.gp_button.fastlook");
+
+    fastlook_enabled = false;
+    last_cursor.x = 0.5f * static_cast<float>(globals::width);
+    last_cursor.y = 0.5f * static_cast<float>(globals::height);
+
+    globals::dispatcher.sink<io::GlfwCursorPosEvent>().connect<&on_glfw_cursor_pos>();
+    globals::dispatcher.sink<io::GamepadButtonEvent>().connect<&on_gamepad_button>();
+}
+
+void entity::player_look::update_late(void)
+{
+    if(io::gamepad::available && io::gamepad::active.get_value() && !globals::gui_screen) {
+        auto pitch_value = axis_pitch.get_value(io::gamepad::state, io::gamepad::deadzone.get_value());
+        auto yaw_value = axis_yaw.get_value(io::gamepad::state, io::gamepad::deadzone.get_value());
+
+        if(fastlook_enabled) {
+            // Fastlook allows the camera to
+            // rotate quicker when a button is held down
+            pitch_value *= gamepad_fastlook_factor.get_value();
+            yaw_value *= gamepad_fastlook_factor.get_value();
+        }
+
+        pitch_value *= 0.001f * static_cast<float>(gamepad_accel_pitch.get_value());
+        yaw_value *= 0.001f * static_cast<float>(gamepad_accel_yaw.get_value());
+
+        add_angles(pitch_value, yaw_value);
+    }
+
+    if(!globals::gui_screen && session::is_ingame()) {
+        glfwSetInputMode(globals::window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
+        glfwSetInputMode(globals::window, GLFW_RAW_MOUSE_MOTION, mouse_raw_input.get_value());
+    }
+    else {
+        glfwSetInputMode(globals::window, GLFW_CURSOR, GLFW_CURSOR_NORMAL);
+        glfwSetInputMode(globals::window, GLFW_RAW_MOUSE_MOTION, false);
+    }
+}
diff --git a/src/game/client/entity/player_look.hh b/src/game/client/entity/player_look.hh
new file mode 100644
index 0000000..0ae18db
--- /dev/null
+++ b/src/game/client/entity/player_look.hh
@@ -0,0 +1,7 @@
+#pragma once
+
+namespace entity::player_look
+{
+void init(void);
+void update_late(void);
+} // namespace entity::player_look
diff --git a/src/game/client/entity/player_move.cc b/src/game/client/entity/player_move.cc
new file mode 100644
index 0000000..4087b04
--- /dev/null
+++ b/src/game/client/entity/player_move.cc
@@ -0,0 +1,298 @@
+#include "client/pch.hh"
+
+#include "client/entity/player_move.hh"
+
+#include "core/config/boolean.hh"
+#include "core/config/number.hh"
+
+#include "core/io/config_map.hh"
+
+#include "core/math/angles.hh"
+#include "core/math/constexpr.hh"
+
+#include "shared/entity/grounded.hh"
+#include "shared/entity/head.hh"
+#include "shared/entity/transform.hh"
+#include "shared/entity/velocity.hh"
+
+#include "shared/world/dimension.hh"
+
+#include "client/config/gamepad_axis.hh"
+#include "client/config/gamepad_button.hh"
+#include "client/config/keybind.hh"
+
+#include "client/gui/gui_screen.hh"
+#include "client/gui/settings.hh"
+#include "client/gui/status_lines.hh"
+
+#include "client/io/gamepad.hh"
+
+#include "client/sound/sound.hh"
+
+#include "client/world/voxel_sounds.hh"
+
+#include "client/const.hh"
+#include "client/globals.hh"
+#include "client/session.hh"
+#include "client/toggles.hh"
+
+constexpr static std::uint64_t PMOVE_JUMP_COOLDOWN = 500000; // 0.5 seconds
+
+constexpr static float PMOVE_FOOTSTEP_SIZE = 2.0f;
+
+// Movement keys
+static config::KeyBind key_move_forward(GLFW_KEY_W);
+static config::KeyBind key_move_back(GLFW_KEY_S);
+static config::KeyBind key_move_left(GLFW_KEY_A);
+static config::KeyBind key_move_right(GLFW_KEY_D);
+static config::KeyBind key_move_down(GLFW_KEY_LEFT_SHIFT);
+static config::KeyBind key_move_up(GLFW_KEY_SPACE);
+
+// Movement gamepad axes
+static config::GamepadAxis axis_move_forward(GLFW_GAMEPAD_AXIS_RIGHT_X, false);
+static config::GamepadAxis axis_move_sideways(GLFW_GAMEPAD_AXIS_RIGHT_Y, false);
+
+// Movement gamepad buttons
+static config::GamepadButton button_move_down(GLFW_GAMEPAD_BUTTON_DPAD_DOWN);
+static config::GamepadButton button_move_up(GLFW_GAMEPAD_BUTTON_DPAD_UP);
+
+// General movement options
+static config::Boolean enable_speedometer(true);
+
+static glm::fvec3 movement_direction;
+
+static std::uint64_t next_jump_us;
+static float speedometer_value;
+static float footsteps_distance;
+
+static std::mt19937_64 pitch_random;
+static std::uniform_real_distribution<float> pitch_distrib;
+
+// Quake III's PM_Accelerate-ish function used for
+// conventional (gravity-affected non-flight) movement
+static glm::fvec3 pm_accelerate(const glm::fvec3& wishdir, const glm::fvec3& velocity, float wishspeed, float accel)
+{
+    auto current_speed = glm::dot(velocity, wishdir);
+    auto add_speed = wishspeed - current_speed;
+
+    if(add_speed <= 0.0f) {
+        // Not accelerating
+        return velocity;
+    }
+
+    auto accel_speed = glm::min(add_speed, accel * globals::fixed_frametime * wishspeed);
+
+    auto result = glm::fvec3(velocity);
+    result.x += accel_speed * wishdir.x;
+    result.z += accel_speed * wishdir.z;
+    return result;
+}
+
+// Conventional movement - velocity update when not on the ground
+static glm::fvec3 pm_air_move(const glm::fvec3& wishdir, const glm::fvec3& velocity)
+{
+    return pm_accelerate(wishdir, velocity, PMOVE_ACCELERATION_AIR, PMOVE_MAX_SPEED_AIR);
+}
+
+// Conventional movement - velocity uodate when on the ground
+static glm::fvec3 pm_ground_move(const glm::fvec3& wishdir, const glm::fvec3& velocity)
+{
+    if(auto speed = glm::length(velocity)) {
+        auto speed_drop = speed * PMOVE_FRICTION_GROUND * globals::fixed_frametime;
+        auto speed_factor = glm::max(speed - speed_drop, 0.0f) / speed;
+        return pm_accelerate(wishdir, velocity * speed_factor, PMOVE_ACCELERATION_GROUND, PMOVE_MAX_SPEED_GROUND);
+    }
+
+    return pm_accelerate(wishdir, velocity, PMOVE_ACCELERATION_GROUND, PMOVE_MAX_SPEED_GROUND);
+}
+
+// A simpler minecraft-like acceleration model
+// used whenever the TOGGLE_PM_FLIGHT is enabled
+static glm::fvec3 pm_flight_move(const glm::fvec3& wishdir)
+{
+    // FIXME: make it smoother
+    return wishdir * PMOVE_MAX_SPEED_AIR;
+}
+
+void entity::player_move::init(void)
+{
+    movement_direction = ZERO_VEC3<float>;
+
+    next_jump_us = 0x0000000000000000U;
+    speedometer_value = 0.0f;
+    footsteps_distance = 0.0f;
+
+    // UNDONE: make this a separate subsystem
+    pitch_random.seed(std::random_device()());
+    pitch_distrib = std::uniform_real_distribution<float>(0.9f, 1.1f);
+
+    globals::client_config.add_value("player_move.key.forward", key_move_forward);
+    globals::client_config.add_value("player_move.key.back", key_move_back);
+    globals::client_config.add_value("player_move.key.left", key_move_left);
+    globals::client_config.add_value("player_move.key.right", key_move_right);
+    globals::client_config.add_value("player_move.key.down", key_move_down);
+    globals::client_config.add_value("player_move.key.up", key_move_up);
+    globals::client_config.add_value("player_move.gp_axis.move_forward", axis_move_forward);
+    globals::client_config.add_value("player_move.gp_axis.move_sideways", axis_move_sideways);
+    globals::client_config.add_value("player_move.gp_button.move_down", button_move_down);
+    globals::client_config.add_value("player_move.gp_button.move_up", button_move_up);
+    globals::client_config.add_value("player_move.enable_speedometer", enable_speedometer);
+
+    settings::add_keybind(1, key_move_forward, settings_location::KEYBOARD_MOVEMENT, "player_move.key.forward");
+    settings::add_keybind(2, key_move_back, settings_location::KEYBOARD_MOVEMENT, "player_move.key.back");
+    settings::add_keybind(3, key_move_left, settings_location::KEYBOARD_MOVEMENT, "player_move.key.left");
+    settings::add_keybind(4, key_move_right, settings_location::KEYBOARD_MOVEMENT, "player_move.key.right");
+    settings::add_keybind(5, key_move_down, settings_location::KEYBOARD_MOVEMENT, "player_move.key.down");
+    settings::add_keybind(6, key_move_up, settings_location::KEYBOARD_MOVEMENT, "player_move.key.up");
+
+    settings::add_gamepad_axis(0, axis_move_forward, settings_location::GAMEPAD_MOVEMENT, "player_move.gp_axis.move_forward");
+    settings::add_gamepad_axis(1, axis_move_sideways, settings_location::GAMEPAD_MOVEMENT, "player_move.gp_axis.move_sideways");
+    settings::add_gamepad_button(2, button_move_down, settings_location::GAMEPAD_MOVEMENT, "player_move.gp_button.move_down");
+    settings::add_gamepad_button(3, button_move_up, settings_location::GAMEPAD_MOVEMENT, "player_move.gp_button.move_up");
+
+    settings::add_checkbox(2, enable_speedometer, settings_location::VIDEO_GUI, "player_move.enable_speedometer", true);
+}
+
+void entity::player_move::fixed_update(void)
+{
+    const auto& head = globals::dimension->entities.get<entity::Head>(globals::player);
+    auto& transform = globals::dimension->entities.get<entity::Transform>(globals::player);
+    auto& velocity = globals::dimension->entities.get<entity::Velocity>(globals::player);
+
+    // Interpolation - preserve current component states
+    globals::dimension->entities.emplace_or_replace<entity::client::TransformPrev>(globals::player, transform);
+
+    glm::fvec3 forward, right;
+    math::vectors(glm::fvec3(0.0f, head.angles[1], 0.0f), &forward, &right, nullptr);
+
+    glm::fvec3 wishdir = ZERO_VEC3<float>;
+    glm::fvec3 movevars = glm::fvec3(movement_direction.x, 0.0f, movement_direction.z);
+    wishdir.x = glm::dot(movevars, right);
+    wishdir.z = glm::dot(movevars, forward);
+
+    if(toggles::get(TOGGLE_PM_FLIGHT)) {
+        velocity.value = pm_flight_move(glm::fvec3(wishdir.x, movement_direction.y, wishdir.z));
+        return;
+    }
+
+    auto grounded = globals::dimension->entities.try_get<entity::Grounded>(globals::player);
+    auto velocity_horizontal = glm::fvec3(velocity.value.x, 0.0f, velocity.value.z);
+
+    if(grounded) {
+        auto new_velocity = pm_ground_move(wishdir, velocity_horizontal);
+        velocity.value.x = new_velocity.x;
+        velocity.value.z = new_velocity.z;
+
+        auto new_speed = glm::length(new_velocity);
+
+        if(new_speed > 0.01f) {
+            footsteps_distance += globals::fixed_frametime * new_speed;
+        }
+        else {
+            footsteps_distance = 0.0f;
+        }
+
+        if(footsteps_distance >= PMOVE_FOOTSTEP_SIZE) {
+            if(auto effect = world::voxel_sounds::get_footsteps(grounded->surface)) {
+                sound::play_player(effect, false, pitch_distrib(pitch_random));
+            }
+
+            footsteps_distance = 0.0f;
+        }
+    }
+    else {
+        auto new_velocity = pm_air_move(wishdir, velocity_horizontal);
+        velocity.value.x = new_velocity.x;
+        velocity.value.z = new_velocity.z;
+    }
+
+    if(movement_direction.y == 0.0f) {
+        // Allow players to queue bunny-jumps by quickly
+        // releasing and pressing the jump key again without a cooldown
+        next_jump_us = 0x0000000000000000U;
+        return;
+    }
+
+    if(grounded && (movement_direction.y > 0.0f) && (globals::curtime >= next_jump_us)) {
+        velocity.value.y = -PMOVE_JUMP_FORCE * globals::dimension->get_gravity();
+
+        auto new_speed = glm::length(glm::fvec2(velocity.value.x, velocity.value.z));
+        auto new_speed_text = std::format("{:.02f} M/S", new_speed);
+        auto speed_change = new_speed - speedometer_value;
+
+        speedometer_value = new_speed;
+
+        next_jump_us = globals::curtime + PMOVE_JUMP_COOLDOWN;
+
+        if(enable_speedometer.get_value()) {
+            if(glm::abs(speed_change) < 0.01f) {
+                // No considerable speed increase within
+                // the precision we use to draw the speedometer
+                gui::status_lines::set(gui::STATUS_DEBUG, new_speed_text, ImVec4(0.7f, 0.7f, 0.7f, 1.0f), 1.0f);
+            }
+            else if(speed_change < 0.0f) {
+                // Speed change is negative, we are actively
+                // slowing down; use the red color for the status line
+                gui::status_lines::set(gui::STATUS_DEBUG, new_speed_text, ImVec4(1.0f, 0.0f, 0.0f, 1.0f), 1.0f);
+            }
+            else {
+                // Speed change is positive, we are actively
+                // speeding up; use the green color for the status line
+                gui::status_lines::set(gui::STATUS_DEBUG, new_speed_text, ImVec4(0.0f, 1.0f, 0.0f, 1.0f), 1.0f);
+            }
+        }
+
+        if(auto effect = world::voxel_sounds::get_footsteps(grounded->surface)) {
+            sound::play_player(effect, false, 1.0f);
+        }
+    }
+}
+
+void entity::player_move::update_late(void)
+{
+    movement_direction = ZERO_VEC3<float>;
+
+    if(globals::gui_screen || !session::is_ingame()) {
+        // We're either disconnected or have the
+        // UI opened up; anyways we shouldn't move
+        return;
+    }
+
+    if(io::gamepad::available && io::gamepad::active.get_value()) {
+        if(button_move_down.is_pressed(io::gamepad::state)) {
+            movement_direction += DIR_DOWN<float>;
+        }
+
+        if(button_move_up.is_pressed(io::gamepad::state)) {
+            movement_direction += DIR_UP<float>;
+        }
+
+        movement_direction.x += axis_move_sideways.get_value(io::gamepad::state, io::gamepad::deadzone.get_value());
+        movement_direction.z -= axis_move_forward.get_value(io::gamepad::state, io::gamepad::deadzone.get_value());
+    }
+    else {
+        if(GLFW_PRESS == glfwGetKey(globals::window, key_move_forward.get_key())) {
+            movement_direction += DIR_FORWARD<float>;
+        }
+
+        if(GLFW_PRESS == glfwGetKey(globals::window, key_move_back.get_key())) {
+            movement_direction += DIR_BACK<float>;
+        }
+
+        if(GLFW_PRESS == glfwGetKey(globals::window, key_move_left.get_key())) {
+            movement_direction += DIR_LEFT<float>;
+        }
+
+        if(GLFW_PRESS == glfwGetKey(globals::window, key_move_right.get_key())) {
+            movement_direction += DIR_RIGHT<float>;
+        }
+
+        if(GLFW_PRESS == glfwGetKey(globals::window, key_move_down.get_key())) {
+            movement_direction += DIR_DOWN<float>;
+        }
+
+        if(GLFW_PRESS == glfwGetKey(globals::window, key_move_up.get_key())) {
+            movement_direction += DIR_UP<float>;
+        }
+    }
+}
diff --git a/src/game/client/entity/player_move.hh b/src/game/client/entity/player_move.hh
new file mode 100644
index 0000000..8c033cc
--- /dev/null
+++ b/src/game/client/entity/player_move.hh
@@ -0,0 +1,15 @@
+#pragma once
+
+constexpr static float PMOVE_MAX_SPEED_AIR = 16.0f;
+constexpr static float PMOVE_MAX_SPEED_GROUND = 8.0f;
+constexpr static float PMOVE_ACCELERATION_AIR = 3.0f;
+constexpr static float PMOVE_ACCELERATION_GROUND = 6.0f;
+constexpr static float PMOVE_FRICTION_GROUND = 10.0f;
+constexpr static float PMOVE_JUMP_FORCE = 0.275f;
+
+namespace entity::player_move
+{
+void init(void);
+void fixed_update(void);
+void update_late(void);
+} // namespace entity::player_move
diff --git a/src/game/client/entity/sound_emitter.cc b/src/game/client/entity/sound_emitter.cc
new file mode 100644
index 0000000..57909ec
--- /dev/null
+++ b/src/game/client/entity/sound_emitter.cc
@@ -0,0 +1,63 @@
+#include "client/pch.hh"
+
+#include "client/entity/sound_emitter.hh"
+
+#include "core/config/number.hh"
+
+#include "core/math/constexpr.hh"
+
+#include "shared/entity/transform.hh"
+#include "shared/entity/velocity.hh"
+
+#include "shared/world/dimension.hh"
+
+#include "shared/coord.hh"
+
+#include "client/entity/camera.hh"
+
+#include "client/sound/sound.hh"
+
+#include "client/globals.hh"
+
+entity::SoundEmitter::SoundEmitter(void)
+{
+    alGenSources(1, &source);
+    sound = nullptr;
+}
+
+entity::SoundEmitter::~SoundEmitter(void)
+{
+    alSourceStop(source);
+    alDeleteSources(1, &source);
+}
+
+void entity::SoundEmitter::update(void)
+{
+    if(globals::dimension) {
+        const auto view = globals::dimension->entities.view<entity::SoundEmitter>();
+
+        const auto& pivot = entity::camera::position_chunk;
+        const auto gain = glm::clamp(sound::volume_effects.get_value() * 0.01f, 0.0f, 1.0f);
+
+        for(const auto [entity, emitter] : view.each()) {
+            alSourcef(emitter.source, AL_GAIN, gain);
+
+            if(const auto transform = globals::dimension->entities.try_get<entity::client::TransformIntr>(entity)) {
+                auto position = coord::to_relative(pivot, transform->chunk, transform->local);
+                alSource3f(emitter.source, AL_POSITION, position.x, position.y, position.z);
+            }
+
+            if(const auto velocity = globals::dimension->entities.try_get<entity::Velocity>(entity)) {
+                alSource3f(emitter.source, AL_VELOCITY, velocity->value.x, velocity->value.y, velocity->value.z);
+            }
+
+            ALint source_state;
+            alGetSourcei(emitter.source, AL_SOURCE_STATE, &source_state);
+
+            if(source_state == AL_STOPPED) {
+                alSourceRewind(emitter.source);
+                emitter.sound = nullptr;
+            }
+        }
+    }
+}
diff --git a/src/game/client/entity/sound_emitter.hh b/src/game/client/entity/sound_emitter.hh
new file mode 100644
index 0000000..72a3f74
--- /dev/null
+++ b/src/game/client/entity/sound_emitter.hh
@@ -0,0 +1,20 @@
+#pragma once
+
+#include "core/resource/resource.hh"
+
+struct SoundEffect;
+
+namespace entity
+{
+struct SoundEmitter final {
+    resource_ptr<SoundEffect> sound;
+    ALuint source;
+
+public:
+    explicit SoundEmitter(void);
+    virtual ~SoundEmitter(void);
+
+public:
+    static void update(void);
+};
+} // namespace entity