Move game sources into src subdirectory

1 files changed, 283 insertions, 0 deletions

diff --git a/src/game/client/player_move.cc b/src/game/client/player_move.cc
new file mode 100644
index 0000000..d949d53
--- /dev/null
+++ b/src/game/client/player_move.cc
@@ -0,0 +1,283 @@
+#include "client/pch.hh"
+
+#include "client/player_move.hh"
+
+#include "core/angles.hh"
+#include "core/config.hh"
+#include "core/constexpr.hh"
+
+#include "shared/dimension.hh"
+#include "shared/grounded.hh"
+#include "shared/head.hh"
+#include "shared/transform.hh"
+#include "shared/velocity.hh"
+
+#include "client/const.hh"
+#include "client/gamepad.hh"
+#include "client/gamepad_axis.hh"
+#include "client/gamepad_button.hh"
+#include "client/globals.hh"
+#include "client/gui_screen.hh"
+#include "client/keybind.hh"
+#include "client/session.hh"
+#include "client/settings.hh"
+#include "client/sound.hh"
+#include "client/status_lines.hh"
+#include "client/toggles.hh"
+#include "client/voxel_sounds.hh"
+
+constexpr static std::uint64_t PMOVE_JUMP_COOLDOWN = 500000; // 0.5 seconds
+
+constexpr static float PMOVE_FOOTSTEP_SIZE = 2.0f;
+
+// Movement keys
+static ConfigKeyBind key_move_forward(GLFW_KEY_W);
+static ConfigKeyBind key_move_back(GLFW_KEY_S);
+static ConfigKeyBind key_move_left(GLFW_KEY_A);
+static ConfigKeyBind key_move_right(GLFW_KEY_D);
+static ConfigKeyBind key_move_down(GLFW_KEY_LEFT_SHIFT);
+static ConfigKeyBind key_move_up(GLFW_KEY_SPACE);
+
+// Movement gamepad axes
+static ConfigGamepadAxis axis_move_forward(GLFW_GAMEPAD_AXIS_RIGHT_X, false);
+static ConfigGamepadAxis axis_move_sideways(GLFW_GAMEPAD_AXIS_RIGHT_Y, false);
+
+// Movement gamepad buttons
+static ConfigGamepadButton button_move_down(GLFW_GAMEPAD_BUTTON_DPAD_DOWN);
+static ConfigGamepadButton button_move_up(GLFW_GAMEPAD_BUTTON_DPAD_UP);
+
+// General movement options
+static ConfigBoolean 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 = vx::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 = vx::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 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 player_move::fixed_update(void)
+{
+    const auto& head = globals::dimension->entities.get<HeadComponent>(globals::player);
+    auto& transform = globals::dimension->entities.get<TransformComponent>(globals::player);
+    auto& velocity = globals::dimension->entities.get<VelocityComponent>(globals::player);
+
+    // Interpolation - preserve current component states
+    globals::dimension->entities.emplace_or_replace<TransformComponentPrev>(globals::player, transform);
+
+    glm::fvec3 forward, right;
+    cxangles::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<GroundedComponent>(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 = 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(vx::abs(speed_change) < 0.01f) {
+                // No considerable speed increase within
+                // the precision we use to draw the speedometer
+                status_lines::set(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
+                status_lines::set(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
+                status_lines::set(STATUS_DEBUG, new_speed_text, ImVec4(0.0f, 1.0f, 0.0f, 1.0f), 1.0f);
+            }
+        }
+
+        if(auto effect = voxel_sounds::get_footsteps(grounded->surface)) {
+            sound::play_player(effect, false, 1.0f);
+        }
+    }
+}
+
+void 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(gamepad::available && gamepad::active.get_value()) {
+        if(button_move_down.is_pressed(gamepad::state)) {
+            movement_direction += DIR_DOWN<float>;
+        }
+
+        if(button_move_up.is_pressed(gamepad::state)) {
+            movement_direction += DIR_UP<float>;
+        }
+
+        movement_direction.x += axis_move_sideways.get_value(gamepad::state, gamepad::deadzone.get_value());
+        movement_direction.z -= axis_move_forward.get_value(gamepad::state, 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>;
+        }
+    }
+}