adding 2d platform example

examples/PlatformTemplate/scripts/areatrigger.gd

@@ -0,0 +1,20 @@
+extends Area2D
+
+@export var effect = "alert"
+signal areatrigger(effect, Object)
+
+func _on_area_entered(area):
+	print("area entered")
+
+
+func _on_area_exited(area):
+	print("area exited")
+
+
+func _on_body_entered(body):
+	print("body entered")
+	areatrigger.emit(effect, body)
+
+
+func _on_body_exited(body):
+	print("body exited")

examples/PlatformTemplate/scripts/gamecontroller.gd

@@ -0,0 +1,32 @@
+extends Node2D
+
+# call downward, signal upward
+@onready var block = $Node2D
+var boxInstance = preload("res://scenes/rigidbody.tscn")
+
+# Called when the node enters the scene tree for the first time.
+func _ready():
+	pass # Replace with function body.
+
+
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+func _process(delta):
+	pass
+
+
+func _on_trigger_one_areatrigger(effect, body):
+	match effect:
+		"unlock":
+			if !body.is_in_group("boxes"):
+				if is_instance_valid(block):
+					block.queue_free() 
+		"boxdrop":
+			# make some boxes
+			# ensure boxes do not trigger trap!
+			if!body.is_in_group("boxes"):
+				for n in 3:
+					var mybox = boxInstance.instantiate()
+					mybox.add_to_group("boxes")
+					mybox.position = Vector2(465,23)
+					add_child(mybox)
+

examples/PlatformTemplate/scripts/playermovement.gd

@@ -0,0 +1,97 @@
+extends CharacterBody2D
+
+
+const SPEED = 200.0
+const JUMP_VELOCITY = -300.0
+const PUSH_FORCE = 80.0
+const BLAST_SPEED = 750
+
+var pushLeftEnabled = false
+var pushRightEnabled = false
+var pushTarget
+var faceLeft = false
+
+# Get the gravity from the project settings to be synced with RigidBody nodes.
+var gravity = ProjectSettings.get_setting("physics/2d/default_gravity")
+@onready var animated_sprite = $AnimatedSprite2D
+@onready var rightRay = $RightRaycast
+@onready var leftRay = $LeftRaycast
+@onready var label = $Label
+@onready var markerRight = $MarkerRight
+@onready var markerLeft = $MarkerLeft
+
+var bullet = preload("res://scenes/bullet.tscn")
+
+func _physics_process(delta):
+	# Add the gravity.
+	if not is_on_floor():
+		velocity.y += gravity * delta
+
+	# Handle jump.
+	if Input.is_action_just_pressed("jump") and is_on_floor():
+		velocity.y = JUMP_VELOCITY
+
+	# Get the input direction and handle the movement/deceleration.
+	# As good practice, you should replace UI actions with custom gameplay actions.
+	var direction = Input.get_axis("runleft", "runright")
+	
+	if Input.is_action_just_pressed("push") && pushRightEnabled && faceLeft == false:
+		label.text="shove"
+		pushTarget.apply_central_impulse(Vector2(1,0) * PUSH_FORCE * 20)
+		pushRightEnabled = false
+		
+	if Input.is_action_just_pressed("push") && pushLeftEnabled :
+		label.text="shove"
+		pushTarget.apply_central_impulse(Vector2(-1,0) * PUSH_FORCE * 20)
+		pushLeftEnabled = false
+	
+	if Input.is_action_just_pressed("blast"):
+		var mybullet = bullet.instantiate()
+		mybullet.setSpeed(-BLAST_SPEED if faceLeft else BLAST_SPEED)
+		owner.add_child(mybullet)
+		mybullet.transform = markerLeft.global_transform if faceLeft else markerRight.global_transform
+
+	if direction:
+		velocity.x = direction * SPEED
+		faceLeft = true if direction<0 else false
+		animated_sprite.flip_h = true if direction < 0 else false
+	else:
+		# slow the character to a stop
+		velocity.x = move_toward(velocity.x, 0, SPEED)
+	if is_on_floor():
+		if direction==0:
+			label.text="idle"
+			animated_sprite.play("idle")
+		else:
+			label.text="run"
+			animated_sprite.play("run")
+	else:
+		label.text="jump"
+		animated_sprite.play("jump")
+		
+
+	move_and_slide()
+	# Detect colliders in the ray
+	if rightRay.is_colliding():
+		var collider = rightRay.get_collider()
+		if collider is Node:
+			if collider.is_in_group("boxes"):
+				pushRightEnabled = true
+				pushTarget = collider
+	else:
+		pushRightEnabled = false
+	if leftRay.is_colliding():
+		var collider = leftRay.get_collider()
+		if collider is Node:
+			if collider.is_in_group("boxes"):
+				pushLeftEnabled = true
+				pushTarget = collider
+	else:
+		pushLeftEnabled = false
+
+	# This represents the player's inertia
+	# after calling move_and_slide()
+	for i in get_slide_collision_count():
+		var c = get_slide_collision(i)
+		if c.get_collider() is RigidBody2D:
+			c.get_collider().apply_central_impulse(-c.get_normal() * PUSH_FORCE)