Adding running and crouching

project.godot

@@ -98,6 +98,11 @@ run={
 "events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":4194325,"key_label":0,"unicode":0,"location":0,"echo":false,"script":null)
 ]
 }
+crouch={
+"deadzone": 0.2,
+"events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":4194326,"key_label":0,"unicode":0,"location":0,"echo":false,"script":null)
+]
+}
 
 [layer_names]
 

scenes/player/player.gd

@@ -2,24 +2,34 @@ class_name Player
 extends CharacterBody3D
 
 
+@export var acceleration: float = 10.0
+@export var crouch_height: float = 0.95
+@export var crouch_speed: float = 3.0
 @export var jump_velocity: float = 4.5
 @export var mouse_sensitivity_horizontal: float = 0.002
 @export var mouse_sensitivity_vertical: float = 0.002
 @export var walk_speed: float = 5.0
-@export var run_speed: float = 7.5
+@export var run_speed: float = 8
 
 @onready var camera: Camera3D = $Camera
-@onready var ray_cast: RayCast3D = $RayCast3D
-
+@onready var collision_shape_standing: CollisionShape3D = $CollisionShapeStanding
+@onready var collision_shape_crouching: CollisionShape3D = $CollisionShapeCrouching
+@onready var ray_cast_look: RayCast3D = $RayCastLook
+@onready var ray_cast_crouch: RayCast3D = $RayCastCrouch
 
+var current_speed: float = 0
+var is_crouching: bool = false
 var is_running: bool = false
 
 
 func _physics_process(delta: float) -> void:
+	is_crouching = Input.is_action_pressed("crouch")
+
 	apply_gravity(delta)
 	handle_jump()
 	handle_running()
 	handle_movement()
+	handle_crouching(delta)
 
 	move_and_slide()
 
@@ -32,6 +42,21 @@ func apply_gravity(delta: float) -> void:
 	if is_on_floor(): return
 	velocity += get_gravity() * delta
 
+## It's not generally recommended to modify the shape/size of a collision shape during runtime.
+##   For this reason, we have 2 collision shapes, with 1 disabled at all times
+##   along with the changing the height of the camera (using lerp for smoother movement)
+func handle_crouching(delta: float) -> void:
+	if is_crouching:
+		collision_shape_crouching.disabled = false
+		collision_shape_standing.disabled = true
+		camera.transform.origin.y = lerp(camera.transform.origin.y, crouch_height, acceleration * delta)
+	elif !ray_cast_crouch.is_colliding():
+		collision_shape_crouching.disabled = true
+		collision_shape_standing.disabled = false
+		camera.transform.origin.y = lerp(camera.transform.origin.y, 1.8, acceleration * delta)
+	else:
+		pass # Continue crouching until nothing overhead
+
 func handle_jump() -> void:
 	if not Input.is_action_just_pressed("jump"): return
 	if not is_on_floor(): return
@@ -41,20 +66,19 @@ func handle_mouse_look(event: InputEvent) -> void:
 	rotation.y = rotation.y - event.relative.x * mouse_sensitivity_horizontal
 	camera.rotation.x = camera.rotation.x - event.relative.y * mouse_sensitivity_vertical
 	camera.rotation.x = clamp(camera.rotation.x, deg_to_rad(-90), deg_to_rad(90))
-	ray_cast.rotation.x = camera.rotation.x
+	ray_cast_look.rotation.x = camera.rotation.x
 
 func handle_movement() -> void:
 	var input_dir: Vector2 = Input.get_vector("move_left", "move_right", "move_forward", "move_backward")
 	var direction: Vector3 = (transform.basis * Vector3(input_dir.x, 0, input_dir.y)).normalized()
 
-	var speed: float = run_speed if is_running else walk_speed
-
+	set_movement_speed()
 	if direction:
-		velocity.x = direction.x * speed
-		velocity.z = direction.z * speed
+		velocity.x = direction.x * current_speed
+		velocity.z = direction.z * current_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, current_speed)
+		velocity.z = move_toward(velocity.z, 0, current_speed)
 
 ## Determine if should be running. This needs to run prior to handle_movement().
 ##   Running is disabled when:[br]
@@ -67,3 +91,11 @@ func handle_running() -> void:
 		is_running = false
 	if velocity == Vector3.ZERO:
 		is_running = false
+
+func set_movement_speed() -> void:
+	if is_crouching:
+		current_speed = crouch_speed
+	elif is_running:
+		current_speed = run_speed
+	else:
+		current_speed = walk_speed

scenes/player/player.tscn

@@ -1,4 +1,4 @@
-[gd_scene load_steps=5 format=3 uid="uid://cggiju8k3bkoc"]
+[gd_scene load_steps=6 format=3 uid="uid://cggiju8k3bkoc"]
 
 [ext_resource type="Script" uid="uid://b6xiwiwwbdapd" path="res://scenes/player/player.gd" id="1_rp718"]
 [ext_resource type="Script" uid="uid://bruuttf8j7wet" path="res://scenes/player/ray_cast_3d.gd" id="2_dovo2"]
@@ -6,24 +6,38 @@
 [sub_resource type="CapsuleShape3D" id="CapsuleShape3D_dovo2"]
 height = 1.95
 
+[sub_resource type="CapsuleShape3D" id="CapsuleShape3D_gmlin"]
+radius = 0.2
+height = 0.6
+
 [sub_resource type="CapsuleMesh" id="CapsuleMesh_gmlin"]
 
 [node name="Player" type="CharacterBody3D"]
 script = ExtResource("1_rp718")
 
-[node name="CollisionShape" type="CollisionShape3D" parent="."]
+[node name="CollisionShapeStanding" type="CollisionShape3D" parent="."]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0.953133, 0)
 shape = SubResource("CapsuleShape3D_dovo2")
 
+[node name="CollisionShapeCrouching" type="CollisionShape3D" parent="."]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0.536112, 0)
+shape = SubResource("CapsuleShape3D_gmlin")
+disabled = true
+
 [node name="MeshInstance" type="MeshInstance3D" parent="."]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0.953133, 0)
 mesh = SubResource("CapsuleMesh_gmlin")
 
 [node name="Camera" type="Camera3D" parent="."]
-transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1.8, -0.005)
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1.8, 0)
 
-[node name="RayCast3D" type="RayCast3D" parent="."]
+[node name="RayCastLook" type="RayCast3D" parent="."]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1.8, 0)
 target_position = Vector3(0, 0, -5)
 debug_shape_custom_color = Color(1, 0, 0, 1)
 script = ExtResource("2_dovo2")
+
+[node name="RayCastCrouch" type="RayCast3D" parent="."]
+editor_description = "Y should be just slightly higher than the height of the standing collision shape"
+target_position = Vector3(0, 1.96, 0)
+debug_shape_custom_color = Color(1, 0, 0, 1)