Initial commit

src/components/PlayerPhysicsController.cs

@@ -0,0 +1,56 @@
+using Godot;
+using System;
+using System.Diagnostics;
+
+public partial class PlayerPhysicsController : CharacterBody2D {
+    [Export]
+    public float FloatingMovePenalty { get; set; } = 0.1f;
+    [Export]
+    public float FloatingJumpPenalty { get; set; } = 0.1f;
+    [Export]
+    public float JumpStrengthDecay { get; set; } = 2;
+    [Export]
+    public float MovementDecay { get; set; } = 2;
+    [Export]
+    public float MovementScale { get; set; } = 10;
+    [Export]
+    public float JumpScale { get; set; } = 12;
+
+    [Export]
+    public Label DebugTextLabel { get; set; }
+
+    [Export]
+    public float Gravity { get; set; } = 9.8f;
+
+    private float _timeInFlight = 0;
+
+    public override void _PhysicsProcess(double delta) {
+        var xAxis = Input.GetAxis("move_left", "move_right") * MovementScale;
+        var yAxis = Input.GetAxis("look_up", "look_down");
+        var jumpStrength = -Input.GetActionStrength("jump") * JumpScale;
+
+        var grounded = this.IsOnFloor();
+        if (!grounded) {
+            xAxis *= FloatingMovePenalty;
+            jumpStrength *= FloatingJumpPenalty;
+        }
+
+        if (grounded && jumpStrength < 0)
+            _timeInFlight = 0;
+        
+        jumpStrength *= Mathf.Exp(-JumpStrengthDecay * _timeInFlight);
+        xAxis *= Mathf.Exp(-MovementDecay * Mathf.Abs(Velocity.X));
+
+
+        var moveVector = new Vector2(xAxis, Gravity + jumpStrength);
+        DebugTextLabel.Text = $"grounded: {grounded}\nmv: {moveVector}\njumpStrength: {jumpStrength}\ntimeInFlight: {_timeInFlight}"; 
+        Velocity += moveVector; 
+        MoveAndSlide();
+
+        if (!grounded)
+            _timeInFlight += (float)delta;
+        base._Process(delta);
+
+    }
+
+}