Mapping and shadows

Scripts/Components/FSM/3DPlayer/ShadowModule.cs

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+using Godot;
+
+namespace Cirno.Scripts.Components.FSM._3DPlayer;
+
+public partial class ShadowModule : ModuleBase<PlayerState, CharacterBody3D>
+{
+    [Export] public NodePath ShadowPath;
+    [Export] public float MaxShadowScale = 1.2f;
+    [Export] public float MinShadowScale = 0.5f;
+    [Export] public float MaxShadowHeight = 5f;
+
+    private IStateMachine<PlayerState, CharacterBody3D> _machine;
+    private CharacterBody3D MainObject => _machine.MainObject;
+    
+    [Export] public Node3D Shadow { get; private set; }
+    
+    [Export(PropertyHint.Layers3DPhysics)] public uint CollisionMask { get; set; }
+    
+    public override void EnterState(PlayerState state)
+    {
+        
+    }
+
+    public override void ExitState(PlayerState state)
+    {
+       
+    }
+
+    public override void Init(IStateMachine<PlayerState, CharacterBody3D> machine)
+    {
+        _machine = machine;
+    }
+
+    public override void Process(double delta)
+    {
+        
+    }
+
+    public override void PhysicsProcess(double delta)
+    {
+        if (Shadow == null) return;
+
+        // Raycast down to get ground height
+        Vector3 origin = MainObject.GlobalTransform.Origin;
+        Vector3 from = origin + Vector3.Up * 0.5f;
+        Vector3 to = origin + Vector3.Down * 20f;
+
+        var spaceState = MainObject.GetWorld3D().DirectSpaceState;
+
+        var result = spaceState.IntersectRay(new PhysicsRayQueryParameters3D
+        {
+            From = from,
+            To = to,
+            CollideWithBodies = true,
+            CollisionMask = CollisionMask,
+            Exclude = [MainObject.GetRid()]
+        });
+        
+        if (result.Count > 0)
+        {
+            Vector3 groundPos = (Vector3)result["position"];
+            float height = origin.Y - groundPos.Y;
+
+            // Clamp and scale
+            float t = Mathf.Clamp(height / MaxShadowHeight, 0f, 1f);
+            float scale = Mathf.Lerp(MaxShadowScale, MinShadowScale, t);
+
+            Shadow.GlobalPosition = new Vector3(origin.X, groundPos.Y + 0.01f, origin.Z);
+            Shadow.Scale = new Vector3(scale, 1f, scale);
+        }
+        else
+        {
+            Shadow.Visible = false;
+        }
+    }
+}

Scripts/Components/FSM/3DPlayer/ShadowModule.cs.uid

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+uid://c8ar11sg0su2h