Commit for Tutorial 03

project/scripts/input_states.gd

@@ -0,0 +1,32 @@
+### class for input handling. Returns 4 button states
+var input_name
+var prev_state
+var current_state
+var input
+
+
+var output_state
+var state_old
+
+### Get the input name and store it
+func _init(var input_name):
+	self.input_name = input_name
+
+### check the input and compare it with previous states
+func check():
+	input = Input.is_action_pressed(self.input_name)
+	prev_state = current_state
+	current_state = input
+
+	state_old = output_state
+
+	if not prev_state and not current_state:
+		output_state = 0 ### Released
+	if not prev_state and current_state:
+		output_state = 1 ### Just Pressed
+	if prev_state and current_state:
+		output_state = 2 ### Pressed
+	if prev_state and not current_state:
+		output_state = 3 ### Just Released
+
+	return output_state

project/scripts/player.gd

@@ -1,26 +1,50 @@
 
 extends RigidBody2D
 
+var input_states = preload("res://scripts/input_states.gd")
+
 export var player_speed = 200
+export var jumpforce = 2000
+export var acceleration = 5
+export var extra_gravity = 400
+
+var raycast_down = null
 
-var btn_right = Input.is_action_pressed("btn_right")
-var btn_left = Input.is_action_pressed("btn_left")
+var current_speed = Vector2(0,0)
 
+var btn_right = input_states.new("btn_right")
+var btn_left = input_states.new("btn_left")
+var btn_jump = input_states.new("btn_jump")
 
+func move(speed, acc, delta):
+	current_speed.x = lerp(current_speed.x , speed, acc * delta)
+	set_linear_velocity(Vector2(current_speed.x,get_linear_velocity().y))
+
+func is_on_ground():
+	if raycast_down.is_colliding():
+		return true
+	else:
+		return false
 
 func _ready():
+	raycast_down = get_node("RayCast2D")
+	raycast_down.add_exception(self)
+
 	# Initalization here
 	set_fixed_process(true)
+	set_applied_force(Vector2(0,extra_gravity))
 
 func _fixed_process(delta):
-	btn_right = Input.is_action_pressed("btn_right")
-	btn_left = Input.is_action_pressed("btn_left")
 
-	if btn_left:
-		set_linear_velocity(Vector2(-player_speed,get_linear_velocity().y))
-	elif btn_right:
-		set_linear_velocity(Vector2(player_speed,get_linear_velocity().y))
+	if btn_left.check() == 2:
+		move(-player_speed, acceleration, delta)
+	elif btn_right.check() == 2:
+		move(player_speed, acceleration, delta)
 	else:
-		set_linear_velocity(Vector2(0,get_linear_velocity().y))
-
+		move(0, acceleration, delta)
+
+	if is_on_ground():
+		if btn_jump.check() == 1:
+			set_axis_velocity(Vector2(0,-jumpforce))
+