feat: implement first-person controller

src/Features/Players/Godot/PlayerController.cs

@@ -1,10 +1,63 @@
-using Game.Features.Player.Domain;
+using System.Linq;
+using Game.Features.Players.Domain;
+using Game.Godot.Extensions;
+using Game.Godot.Mappings;
 using Godot;
-using System;
 
-namespace Game.Features.Player.Godot;
+namespace Game.Features.Players.Godot;
 
 public partial class PlayerController : Node3D
 {
     [Export] public CharacterBody3D Body;
+    [Export] public Camera3D Camera;
+
+    [Export] public float MoveSpeed = 4.0f;
+    [Export] public float JumpVelocity = 4.5f;
+    [Export] public float MouseSensitivity = 0.003f;
+    [Export] public float MaxLookAngleDegrees = 89.0f;
+
+    private PlayerMovement _movement;
+    private PlayerLook _look;
+
+    private static bool IsMouseCaptured() => Input.MouseMode == Input.MouseModeEnum.Captured;
+
+    public override void _Ready()
+    {
+        this.AssertRequiredExports();
+
+        float gravity = (float)ProjectSettings.GetSetting(ProjectSetting.Gravity.SettingPath());
+        _movement = new PlayerMovement(MoveSpeed, JumpVelocity, gravity);
+        _look = new PlayerLook(MouseSensitivity, MaxLookAngleDegrees);
+    }
+
+    public override void _UnhandledInput(InputEvent @event)
+    {
+        if (@event is not InputEventMouseMotion mouseMotion || !IsMouseCaptured()) return;
+
+        Body.RotateY(_look.CalculateYawDelta(mouseMotion.Relative.X));
+        _look.UpdatePitch(mouseMotion.Relative.Y);
+        Camera.Rotation = new Vector3(_look.Pitch, 0f, 0f);
+    }
+
+    public override void _PhysicsProcess(double delta)
+    {
+        Vector2 inputDirection = Input.GetVector(
+            InputAction.MoveLeft.ActionName(),
+            InputAction.MoveRight.ActionName(),
+            InputAction.MoveForward.ActionName(),
+            InputAction.MoveBack.ActionName()
+        );
+
+        MovementInput input = new(
+            Right: Body.Transform.Basis.X,
+            Back: Body.Transform.Basis.Z,
+            Direction: inputDirection,
+            IsOnFloor: Body.IsOnFloor(),
+            JumpPressed: Input.IsActionJustPressed(InputAction.Jump.ActionName()),
+            Delta: (float)delta
+        );
+
+        Body.Velocity = _movement.CalculateVelocity(Body.Velocity, input);
+        Body.MoveAndSlide();
+    }
 }