some juice work on the first person weapon

systems/head/HeadSystem.cs

@@ -6,6 +6,18 @@ namespace Movementtests.systems;
 
 public partial class HeadSystem : Node3D
 {
+    public record CameraParameters(
+        double Delta,
+        Vector2 LookDir,
+        Vector3 PlayerInput,
+        Vector3 PlayerVelocity,
+        Vector3 WallContactPoint,
+        float SensitivitMultiplier,
+        bool WithCameraJitter, 
+        bool WithCameraBobbing, 
+        float BobbingMultiplier, 
+        float FovMultiplier);
+    
     private Camera3D _camera;
     private Marker3D _cameraAnchor;
     private AnimationPlayer _animationPlayer;
@@ -13,25 +25,53 @@ public partial class HeadSystem : Node3D
     [Export(PropertyHint.Range, "0,10,0.1,or_greater")]
     public float LookSensitivity { get; set; } = 1f;
 	
+    [ExportGroup("Camera incline")]
     [Export(PropertyHint.Range, "0.1,50,0.1,or_greater")]
     public double CameraInclineAcceleration { get; set; } = 10f;
-	
     [Export(PropertyHint.Range, "0,10,0.1,or_greater")]
     public float WallRunCameraIncline { get; set; } = 5f;
-	
     [Export(PropertyHint.Range, "0,10,0.1,or_greater")]
     public float GroundedCameraIncline { get; set; } = 5f;
     
+    [ExportGroup("Sliding")]
     [Export(PropertyHint.Range, "0,2,0.1,or_greater")]
     public float SlidingCameraHeightOffset { get; set; } = 1.0f;
-    
     [Export(PropertyHint.Range, "0,1,0.01,or_greater")]
     public float SlidingJitterFrequency { get; set; } = 0.01f;
-    
     [Export(PropertyHint.Range, "0,1,0.01,or_greater")]
     public float SlidingJitterAmplitude { get; set; } = 0.1f;
     
     private FastNoiseLite _slidingNoise = new FastNoiseLite();
+
+    [ExportGroup("Bobbing")]
+    
+    private float _bobbingAccumulator;  // Constantly increases when player moves in X or/and Z axis
+    [Export(PropertyHint.Range, "0,10,0.01,or_greater")]
+    public float BobbingFrequency { set; get; } = 2.4f;
+    [Export(PropertyHint.Range, "0,0.4,0.01,or_greater")]
+    public float BobbingAmplitude { set; get; } = 0.08f;
+    
+    [ExportGroup("FOV")]
+    [Export(PropertyHint.Range, "0,180,0.1,degrees")]
+    public float BaseFov         { get; set; } = 75.0f;
+    [Export(PropertyHint.Range, "0,10,0.01,or_greater")]
+    public float FovChangeFactor { get; set; } = 1.2f;
+    [Export(PropertyHint.Range, "0,10,0.01,or_greater")]
+    public float FovChangeSpeed  { get; set; } = 6.25f;
+    [Export(PropertyHint.Range, "0,100,1,or_greater")]
+    public float FovMaxedOutSpeed { get; set; } = 20f;
+    
+    [ExportGroup("First Person rig")]
+    private Node3D _fpRig;
+    private Vector3 _fpRigInitialPosition;
+    [Export(PropertyHint.Range, "0,10,0.1,or_greater")]
+    public float WeaponSway { get; set; } = 5f;
+    [Export(PropertyHint.Range, "0,10,0.1,or_greater")]
+    public float WeaponLookRotation { get; set; } = 1f;
+    [Export(PropertyHint.Range, "0,200,1,or_greater")]
+    public float WeaponMoveRotation { get; set; } = 80f;
+    [Export(PropertyHint.Range, "0,20,0.1,or_greater")]
+    public float WeaponAdjustmentSpeed { get; set; } = 10f;
     
     public void Init()
     {
@@ -39,7 +79,10 @@ public partial class HeadSystem : Node3D
         _camera = GetNode<Camera3D>("CameraSmooth/Camera3D");
         _cameraAnchor = GetNode<Marker3D>("CameraAnchor");
         _animationPlayer = GetNode<AnimationPlayer>("AnimationPlayer");
-
+        
+        _fpRig = GetNode<Node3D>("FPRig");
+        _fpRigInitialPosition = _fpRig.GlobalPosition;
+        
         _slidingNoise.NoiseType = FastNoiseLite.NoiseTypeEnum.Perlin;
         _slidingNoise.SetFrequency(SlidingJitterFrequency);
     }
@@ -49,8 +92,19 @@ public partial class HeadSystem : Node3D
         _animationPlayer.Play("mantle");
     }
 
-    public void LookAround(double delta, Vector2 lookDir, Vector3 playerInput, Vector3 playerVelocity, Vector3? wallContactPoint = null, float sensitivitMultiplier = 1f, bool isSliding = false)
+    public void LookAround(CameraParameters inputs)
     {
+        var (delta, 
+            lookDir, 
+            playerInput, 
+            playerVelocity, 
+            wallContactPoint, 
+            sensitivitMultiplier, 
+            withCameraJitter, 
+            withCameraBobbing, 
+            bobbingMultiplier,
+            fovMultiplier) = inputs;
+        
         // Horizontal movement of head
         float angleForHorizontalRotation = lookDir.X * LookSensitivity * sensitivitMultiplier;
         RotateY(angleForHorizontalRotation);
@@ -61,11 +115,11 @@ public partial class HeadSystem : Node3D
         currentCameraRotation.X = Mathf.Clamp(currentCameraRotation.X, Mathf.DegToRad(-90f), Mathf.DegToRad(90f));
         
         // Camera incline on Wall and more
-        var isWallRunning = wallContactPoint.HasValue && wallContactPoint.Value.Length() > Mathf.Epsilon;
+        var isWallRunning = wallContactPoint.Length() > Mathf.Epsilon;
         float cameraIncline;
         if (isWallRunning)
         {
-            var directionToWall = (wallContactPoint.Value - GlobalPosition).Normalized();
+            var directionToWall = (wallContactPoint - GlobalPosition).Normalized();
             var cameraInclineFactor = ComputeCameraInclineFactor(directionToWall);
             cameraIncline = Mathf.DegToRad(WallRunCameraIncline * cameraInclineFactor);
         }
@@ -77,7 +131,7 @@ public partial class HeadSystem : Node3D
         currentCameraRotation.Z = (float) Mathf.Lerp(currentCameraRotation.Z, cameraIncline, delta * CameraInclineAcceleration);
         _cameraAnchor.Rotation = currentCameraRotation;
 
-        if (isSliding)
+        if (withCameraJitter)
         {
             _cameraAnchor.Position = Vector3.Down*SlidingCameraHeightOffset;
             float noise1D = _slidingNoise.GetNoise1D(Time.GetTicksMsec());
@@ -89,7 +143,45 @@ public partial class HeadSystem : Node3D
             _cameraAnchor.Position = Vector3.Zero;
         }
         
+        Vector3 newPositionForCamera = Vector3.Zero;
+        Vector3 newPositionForRig = Vector3.Zero;
+        if (withCameraBobbing)
+        {
+            _bobbingAccumulator += (float) delta * playerVelocity.Length();
+            
+            // As the _bobbingAccumulator increases we're changing values for sin and cos functions.
+            // Because both of them are just waves, we will be slide up with y and then slide down with y 
+            // creating bobbing effect. The same works for cos. As the _bobbingAccumulator increases the cos decreases and then increases
+            newPositionForCamera.Y = Mathf.Sin(_bobbingAccumulator * BobbingFrequency) * BobbingAmplitude * bobbingMultiplier;
+            newPositionForCamera.X = Mathf.Cos(_bobbingAccumulator * BobbingFrequency / 2.0f) * BobbingAmplitude * bobbingMultiplier;
+            
+            // Offset bobbing for weapon rig
+            newPositionForRig.Y = Mathf.Cos(_bobbingAccumulator * BobbingFrequency) * BobbingAmplitude * bobbingMultiplier * 0.2f;
+            newPositionForRig.X = Mathf.Sin(_bobbingAccumulator * BobbingFrequency / 2.0f) * BobbingAmplitude * bobbingMultiplier * 0.2f;
+        }
+        _cameraAnchor.Position += newPositionForCamera;
+        
         _camera.GlobalTransform = _cameraAnchor.GetGlobalTransformInterpolated();
+        
+        // First person rig adjustments
+        _fpRig.GlobalTransform = _cameraAnchor.GetGlobalTransformInterpolated();
+        // Apply bobbing
+        _fpRig.Position += newPositionForRig;
+
+        var newRigRotation = _fpRig.Rotation;
+        var camTilt = Mathf.Lerp(_fpRig.Rotation.Z, cameraIncline*WeaponMoveRotation, delta*WeaponAdjustmentSpeed);
+        newRigRotation.Z = (float) camTilt;
+
+        // var lookInputLerped = lookDir.Lerp(Vector2.Zero, (float) delta * WeaponAdjustmentSpeed);
+        newRigRotation.X = Mathf.Lerp(newRigRotation.X, -lookDir.Y*WeaponSway, (float) delta*WeaponAdjustmentSpeed);
+        newRigRotation.Y = Mathf.Lerp(newRigRotation.Y, -lookDir.X*WeaponSway, (float) delta*WeaponAdjustmentSpeed);
+        
+        _fpRig.Rotation = newRigRotation;
+
+        // Camera adjustments
+        float velocityClamped = Mathf.Clamp(playerVelocity.Length(), 0.5f, FovMaxedOutSpeed);
+        float targetFov = BaseFov + FovChangeFactor * velocityClamped * fovMultiplier;
+        _camera.Fov = Mathf.Lerp(_camera.Fov, targetFov, (float) delta * FovChangeSpeed);
     }
 
     public float ComputeCameraInclineFactor(Vector3 direction)

systems/head/head_system.tscn

@@ -1,6 +1,7 @@
-[gd_scene load_steps=5 format=3 uid="uid://0ysqmqphq6mq"]
+[gd_scene load_steps=6 format=3 uid="uid://0ysqmqphq6mq"]
 
 [ext_resource type="Script" uid="uid://dtkdrnsmlwm67" path="res://systems/head/HeadSystem.cs" id="1_8abgy"]
+[ext_resource type="ArrayMesh" uid="uid://ckr26s4e3fj1m" path="res://assets/swords/resources/fp_sword23.tres" id="2_c5qep"]
 
 [sub_resource type="Animation" id="Animation_urko7"]
 length = 0.001
@@ -62,6 +63,15 @@ _data = {
 [node name="HeadSystem" type="Node3D"]
 script = ExtResource("1_8abgy")
 
+[node name="FPRig" type="Node3D" parent="."]
+
+[node name="Sword" type="Node3D" parent="FPRig"]
+
+[node name="SwordMesh" type="MeshInstance3D" parent="FPRig/Sword"]
+transform = Transform3D(0.43494374, 0.027831191, -0.9000275, 0.1806065, 0.9765146, 0.117475554, 0.8821594, -0.2136461, 0.41970232, 0.53640664, -0.82246387, -1.9288678)
+cast_shadow = 0
+mesh = ExtResource("2_c5qep")
+
 [node name="CameraSmooth" type="Node3D" parent="."]
 
 [node name="Camera3D" type="Camera3D" parent="CameraSmooth"]

systems/weapon/WeaponSystem.cs

@@ -60,6 +60,7 @@ public partial class WeaponSystem : RigidBody3D
 
         _startTransform = Transform;
         Freeze = true;
+        Visible = false;
 
         BodyEntered += OnThrownWeaponReachesGround;
 

systems/weapon/weapon.tscn

@@ -3,7 +3,7 @@
 [ext_resource type="Script" uid="uid://iii3wfto4t5b" path="res://systems/weapon/WeaponSystem.cs" id="1_csqwk"]
 [ext_resource type="PackedScene" uid="uid://dbe5f0p6lvqtr" path="res://systems/tween_queue/tween_queue_system.tscn" id="2_x1nha"]
 [ext_resource type="Script" uid="uid://couw105c3bde4" path="res://addons/godot_state_charts/state_chart.gd" id="3_5owyf"]
-[ext_resource type="CylinderMesh" uid="uid://b7vt0nk2htpo4" path="res://systems/weapon/weapon.tres" id="3_svc06"]
+[ext_resource type="ArrayMesh" uid="uid://cho5fixitrbds" path="res://assets/swords/resources/sword23.tres" id="3_svc06"]
 [ext_resource type="Script" uid="uid://jk2jm1g6q853" path="res://addons/godot_state_charts/compound_state.gd" id="4_svc06"]
 [ext_resource type="Script" uid="uid://cytafq8i1y8qm" path="res://addons/godot_state_charts/atomic_state.gd" id="5_m0v1h"]
 [ext_resource type="Script" uid="uid://cf1nsco3w0mf6" path="res://addons/godot_state_charts/transition.gd" id="6_jpdh0"]
@@ -51,7 +51,7 @@ transform = Transform3D(1, 0, 0, 0, -4.37114e-08, 1, 0, -1, -4.37114e-08, 0, 0,
 shape = SubResource("CylinderShape3D_avini")
 
 [node name="Weapon" type="MeshInstance3D" parent="."]
-transform = Transform3D(1, 0, 0, 0, -4.37114e-08, 1, 0, -1, -4.37114e-08, 0, 0, 0)
+transform = Transform3D(1, 0, 0, 0, -4.37114e-08, 1, 0, -1, -4.37114e-08, 0, 0, 0.8673003)
 mesh = ExtResource("3_svc06")
 
 [node name="StateChart" type="Node" parent="."]