Wall slide

metroidvania/Scenes/Player/Player.gd

@@ -11,9 +11,17 @@ export (int) var max_speed = 64
 export (float) var friction = 0.25
 export (int) var gravity = 200
 export (int) var jump_force = 128
+export (int) var wall_slide_speed = 48
+export (int) var max_wall_slide_speed = 128
 export (int) var max_slope = 46
 export (int) var bullet_speed = 250
 
+enum {
+	MOVE,
+	WALL_SLIDE
+}
+
+var state = MOVE
 var invincible = false setget set_invincible
 var motion = Vector2.ZERO
 var snap_vector = Vector2.ZERO
@@ -37,15 +45,33 @@ func _ready():
 
 func _physics_process(delta):
 	just_jumped = false
-	var input_vector = get_input_vector()
-	apply_horizontal_force(input_vector, delta)
-	apply_friction(input_vector)
-	update_snap_vector()
-	jump_check()
-	apply_gravity(delta)
-	update_animations(input_vector)
-	move()
+	
+	match state:
+		MOVE:
+			var input_vector = get_input_vector()
+			apply_horizontal_force(input_vector, delta)
+			apply_friction(input_vector)
+			update_snap_vector()
+			jump_check()
+			apply_gravity(delta)
+			update_animations(input_vector)
+			move()
+			
+			wall_slide_check()
 
+		WALL_SLIDE:
+			animation.play("WallSlide")
+			
+			var wall_axis = get_wall_axis()
+			if wall_axis != 0:
+				sprite.scale.x = wall_axis
+				
+			wall_slide_jump_check(wall_axis)
+			wall_slide_drop_check(delta)
+			wall_slide_fast_slide_check(delta)
+			move()
+			wall_detach_check(wall_axis)
+		
 	if Input.is_action_pressed("fire") and fireBulletTimer.time_left == 0:
 		fire_bullet()
 
@@ -144,11 +170,45 @@ func move():
 	if is_on_floor() and get_floor_velocity().length() == 0 and abs(motion.x) < 1:
 		position.x = last_position.x
 
+func wall_slide_check():
+	if !is_on_floor() and is_on_wall():
+		state = WALL_SLIDE
+		double_jump = true
+		
+func get_wall_axis():
+	var is_right_wall = test_move(transform, Vector2.RIGHT)
+	var is_left_wall = test_move(transform, Vector2.LEFT)
+	return int(is_left_wall) - int(is_right_wall)
+
+func wall_slide_jump_check(wall_axis):
+	if Input.is_action_just_pressed("ui_select"):
+		motion.x = wall_axis * max_speed
+		motion.y = -jump_force/1.25
+		state = MOVE
+		
+func wall_slide_drop_check(delta):
+	if Input.is_action_just_pressed("ui_right"):
+		motion.x = acceleration * delta
+		state = MOVE
+		
+	if Input.is_action_just_pressed("ui_left"):
+		motion.x = -acceleration * delta
+		state = MOVE
+
+func wall_slide_fast_slide_check(delta):
+	var max_slide_speed = wall_slide_speed
+	if Input.is_action_just_pressed("ui_down"):
+		max_slide_speed = max_wall_slide_speed
+	motion.y = min(motion.y + gravity * delta, max_wall_slide_speed)
+
+func wall_detach_check(wall_axis):
+	if wall_axis == 0 or is_on_floor():
+		state = MOVE
+
 func _on_Hurtbox_hit(damage):
 	if not invincible:
 		PlayerStats.health -= damage
 		blinkAnimator.play("Blink")
 
-
 func _on_died():
 	queue_free()