Fix deceleration in CharacterBody 2D and 3D templates

The velocity can never be greater than SPEED because direction is
normalized. This means the move_toward calls are currently equivalent to
assigning the velocity components to 0.

Changing SPEED to SPEED * delta makes the friction effect way too small
(the character drifts too much) so we introduce a new deceleration
constant.

The cosmetics regarding zeros written as floating point are unrelated
to the fix itself.

modules/gdscript/editor/script_templates/CharacterBody2D/basic_movement.gd

@@ -4,6 +4,7 @@ extends _BASE_
 
 
 const SPEED = 300.0
+const DECELERATION = 1000.0
 const JUMP_VELOCITY = -400.0
 
 
@@ -22,6 +23,6 @@ func _physics_process(delta: float) -> void:
 	if direction:
 		velocity.x = direction * SPEED
 	else:
-		velocity.x = move_toward(velocity.x, 0, SPEED)
+		velocity.x = move_toward(velocity.x, 0.0, DECELERATION * delta)
 
 	move_and_slide()

modules/gdscript/editor/script_templates/CharacterBody3D/basic_movement.gd

@@ -4,6 +4,7 @@ extends _BASE_
 
 
 const SPEED = 5.0
+const DECELERATION = 12.0
 const JUMP_VELOCITY = 4.5
 
 
@@ -19,12 +20,12 @@ func _physics_process(delta: float) -> void:
 	# Get the input direction and handle the movement/deceleration.
 	# As good practice, you should replace UI actions with custom gameplay actions.
 	var input_dir := Input.get_vector("ui_left", "ui_right", "ui_up", "ui_down")
-	var direction := (transform.basis * Vector3(input_dir.x, 0, input_dir.y)).normalized()
+	var direction := (transform.basis * Vector3(input_dir.x, 0.0, input_dir.y)).normalized()
 	if direction:
 		velocity.x = direction.x * SPEED
 		velocity.z = direction.z * SPEED
 	else:
-		velocity.x = move_toward(velocity.x, 0, SPEED)
-		velocity.z = move_toward(velocity.z, 0, SPEED)
+		velocity.x = move_toward(velocity.x, 0.0, DECELERATION * delta)
+		velocity.z = move_toward(velocity.z, 0.0, DECELERATION * delta)
 
 	move_and_slide()

modules/mono/editor/script_templates/CharacterBody2D/basic_movement.cs

@@ -6,6 +6,7 @@
 public partial class _CLASS_ : _BASE_
 {
     public const float Speed = 300.0f;
+    public const float Deceleration = 1000.0f;
     public const float JumpVelocity = -400.0f;
 
     public override void _PhysicsProcess(double delta)
@@ -33,7 +34,7 @@ public override void _PhysicsProcess(double delta)
         }
         else
         {
-            velocity.X = Mathf.MoveToward(Velocity.X, 0, Speed);
+            velocity.X = Mathf.MoveToward(Velocity.X, 0.0f, Deceleration * (float)delta);
         }
 
         Velocity = velocity;

modules/mono/editor/script_templates/CharacterBody3D/basic_movement.cs

@@ -6,6 +6,7 @@
 public partial class _CLASS_ : _BASE_
 {
     public const float Speed = 5.0f;
+    public const float Deceleration = 12.0f;
     public const float JumpVelocity = 4.5f;
 
     public override void _PhysicsProcess(double delta)
@@ -27,16 +28,16 @@ public override void _PhysicsProcess(double delta)
         // Get the input direction and handle the movement/deceleration.
         // As good practice, you should replace UI actions with custom gameplay actions.
         Vector2 inputDir = Input.GetVector("ui_left", "ui_right", "ui_up", "ui_down");
-        Vector3 direction = (Transform.Basis * new Vector3(inputDir.X, 0, inputDir.Y)).Normalized();
+        Vector3 direction = (Transform.Basis * new Vector3(inputDir.X, 0.0f, inputDir.Y)).Normalized();
         if (direction != Vector3.Zero)
         {
             velocity.X = direction.X * Speed;
             velocity.Z = direction.Z * Speed;
         }
         else
         {
-            velocity.X = Mathf.MoveToward(Velocity.X, 0, Speed);
-            velocity.Z = Mathf.MoveToward(Velocity.Z, 0, Speed);
+            velocity.X = Mathf.MoveToward(Velocity.X, 0.0f, Deceleration * (float)delta);
+            velocity.Z = Mathf.MoveToward(Velocity.Z, 0.0f, Deceleration * (float)delta);
         }
 
         Velocity = velocity;