new space shooter demo

ortho camera sort fix, closes #2063

demos/2d/space_shooter/asteroid.gd

@@ -0,0 +1,49 @@
+
+extends Area2D
+
+# member variables here, example:
+# var a=2
+# var b="textvar"
+
+const SPEED=-200
+const Y_RANDOM=10
+
+var points=1
+
+
+var speed_y=0.0
+
+func _process(delta):
+
+	translate( Vector2(SPEED,speed_y) * delta )
+
+func _ready():
+	# Initialization here	
+	speed_y=rand_range(-Y_RANDOM,Y_RANDOM)
+	pass
+
+var destroyed=false
+
+func destroy():
+	if (destroyed):
+		return	
+	destroyed=true
+	get_node("anim").play("explode")
+	set_process(false)
+	get_node("sfx").play("sound_explode")
+	#accum points
+	get_node("/root/game_state").points+=1
+	
+func is_enemy():
+	return not destroyed	
+	
+
+func _on_visibility_enter_screen():
+	set_process(true)
+	#make it spin!
+	get_node("anim").play("spin")
+	
+
+func _on_visibility_exit_screen():
+	queue_free()
+	pass # replace with function body

demos/2d/space_shooter/enemy1.gd

@@ -0,0 +1,37 @@
+
+extends Area2D
+
+# member variables here, example:
+# var a=2
+# var b="textvar"
+
+const SPEED=-200
+
+func _process(delta):
+	get_parent().translate(Vector2(SPEED*delta,0))
+
+	
+var destroyed=false
+
+func is_enemy():
+	return not destroyed
+
+
+func destroy():
+	if (destroyed):
+		return	
+	destroyed=true
+	get_node("anim").play("explode")
+	set_process(false)	
+	get_node("sfx").play("sound_explode")
+	#accum points
+	get_node("/root/game_state").points+=5
+
+func _on_visibility_enter_screen():
+	set_process(true)
+	get_node("anim").play("zigzag")	
+	get_node("anim").seek(randf()*2.0) #make it start from any pos
+
+func _on_visibility_exit_screen():
+	queue_free()
+	

demos/2d/space_shooter/enemy2.gd

@@ -0,0 +1,56 @@
+
+extends Area2D
+
+# member variables here, example:
+# var a=2
+# var b="textvar"
+const SPEED=-220
+const SHOOT_INTERVAL=1
+var shoot_timeout=0
+
+func _process(delta):
+	translate( Vector2(SPEED*delta,0) )
+	shoot_timeout-=delta
+	
+	if (shoot_timeout<0):
+	
+		shoot_timeout=SHOOT_INTERVAL
+		
+		#instance a shot
+		var shot = preload("res://enemy_shot.scn").instance()
+		#set pos as "shoot_from" Position2D node
+		shot.set_pos( get_node("shoot_from").get_global_pos() )
+		#add it to parent, so it has world coordinates
+		get_parent().add_child(shot)
+		
+var destroyed=false
+
+func is_enemy():
+	return not destroyed
+
+func destroy():
+	if (destroyed):
+		return	
+	destroyed=true
+	get_node("anim").play("explode")
+	set_process(false)	
+	get_node("sfx").play("sound_explode")
+	#accum points
+	get_node("/root/game_state").points+=10
+
+func _ready():
+	set_fixed_process(true)
+	# Initialization here
+	pass
+
+
+
+
+func _on_visibility_enter_screen():
+	set_process(true)
+	pass # replace with function body
+
+
+func _on_visibility_exit_screen():
+	queue_free()
+	pass # replace with function body

demos/2d/space_shooter/enemy_shot.gd

@@ -0,0 +1,32 @@
+
+extends Area2D
+
+# member variables here, example:
+# var a=2
+# var b="textvar"
+
+const SPEED = -800
+
+func _process(delta):
+	translate(Vector2(delta*SPEED,0))
+
+func _ready():
+	# Initialization here
+	set_process(true)
+
+
+var hit=false
+
+func is_enemy():
+	return true
+
+func _hit_something():
+	if (hit):
+		return
+	hit=true
+	set_process(false)
+	get_node("anim").play("splash")
+
+func _on_visibility_exit_screen():
+	queue_free()
+	

demos/2d/space_shooter/engine.cfg

@@ -0,0 +1,21 @@
+[application]
+
+name="Simple Shooter"
+main_scene="res://main_menu.scn"
+
+[autoload]
+
+game_state="res://game_state.gd"
+
+[display]
+
+width=1024
+height=600
+
+[input]
+
+move_up=[key(Up)]
+move_down=[key(Down)]
+move_left=[key(Left)]
+move_right=[key(Right)]
+shoot=[key(Space)]

demos/2d/space_shooter/game_state.gd

@@ -0,0 +1,24 @@
+extends Node
+
+
+var points = 0
+var max_points = 0
+
+
+func _ready():
+	var f = File.new()
+	#load high score
+	if (f.open("user://highscore",File.READ)==OK):
+		
+		max_points=f.get_var()
+
+
+
+func game_over():
+	if (points>max_points):
+		max_points=points
+		#save high score
+		var f = File.new()
+		f.open("user://highscore",File.WRITE)
+		f.store_var(max_points)
+		

demos/2d/space_shooter/main_menu.gd

@@ -0,0 +1,20 @@
+
+extends Control
+
+# member variables here, example:
+# var a=2
+# var b="textvar"
+
+func _ready():
+
+	get_node("score").set_text( "HIGH SCORE: "+str( get_node("/root/game_state").max_points ) )
+	# Initialization here
+	pass
+
+
+
+
+func _on_play_pressed():
+	get_node("/root/game_state").points=0
+	get_tree().change_scene("res://level.scn")
+	pass # replace with function body

demos/2d/space_shooter/rail.gd

@@ -0,0 +1,26 @@
+
+extends Node2D
+
+
+const SPEED=200
+# member variables here, example:
+# var a=2
+# var b="textvar"
+
+func stop():
+	set_process(false)
+
+var offset=0
+
+
+func _process(delta):
+	
+	offset+=delta*SPEED
+	set_pos(Vector2(offset,0))
+
+func _ready():
+	set_process(true)
+	# Initialization here
+	
+
+

demos/2d/space_shooter/ship.gd

@@ -0,0 +1,88 @@
+
+extends Area2D
+
+# member variables here, example:
+# var a=2
+# var b="textvar"
+
+const SPEED = 200
+
+var screen_size
+
+var prev_shooting=false
+
+func _process(delta):
+
+	var motion = Vector2()
+	if Input.is_action_pressed("move_up"):
+		motion+=Vector2(0,-1)
+	if Input.is_action_pressed("move_down"):
+		motion+=Vector2(0,1)
+	if Input.is_action_pressed("move_left"):
+		motion+=Vector2(-1,0)
+	if Input.is_action_pressed("move_right"):
+		motion+=Vector2(1,0)
+	var shooting = Input.is_action_pressed("shoot")
+		
+	var pos = get_pos()
+	
+	pos+=motion*delta*SPEED
+	if (pos.x<0):
+		pos.x=0
+	if (pos.x>screen_size.x):
+		pos.x=screen_size.x
+	if (pos.y<0):
+		pos.y=0
+	if (pos.y>screen_size.y):
+		pos.y=screen_size.y
+
+	set_pos(pos)
+	
+	if (shooting and not prev_shooting):
+		# just pressed
+		var shot = preload("res://shot.scn").instance()
+		#use the position3d as reference
+		shot.set_pos( get_node("shootfrom").get_global_pos() )
+		#put it two parents above, so it is not moved by us
+		get_node("../..").add_child(shot)
+		#play sound
+		get_node("sfx").play("shoot")
+		
+	
+	prev_shooting = shooting
+
+	#update points counter
+	get_node("../hud/score_points").set_text( str(get_node("/root/game_state").points) )
+
+func _ready():
+	# Initialization here
+	screen_size = get_viewport().get_rect().size
+	set_process(true)
+	pass
+
+var killed=false
+
+func _hit_something():
+	if (killed):
+		return
+	killed=true
+	get_node("anim").play("explode")
+	get_node("sfx").play("sound_explode")
+	get_node("../hud/game_over").show()
+	get_node("/root/game_state").game_over()
+	get_parent().stop()
+	set_process(false)
+
+
+func _on_ship_body_enter( body ):
+	_hit_something()
+
+
+func _on_ship_area_enter( area ):
+	if (area.has_method("is_enemy") and area.is_enemy()):
+		_hit_something()
+
+
+func _on_back_to_menu_pressed():
+	get_tree().change_scene("res://main_menu.scn")
+	pass # replace with function body

demos/2d/space_shooter/shot.gd

@@ -0,0 +1,47 @@
+
+extends Area2D
+
+# member variables here, example:
+# var a=2
+# var b="textvar"
+
+const SPEED = 800
+
+func _process(delta):
+	translate(Vector2(delta*SPEED,0))
+
+func _ready():
+	# Initialization here
+	set_process(true)
+	pass
+
+var hit=false
+
+func _hit_something():
+	if (hit):
+		return
+	hit=true
+	set_process(false)
+	get_node("anim").play("splash")
+
+func _on_visibility_exit_screen():
+	queue_free()
+	pass # replace with function body
+
+
+
+func _on_shot_area_enter( area ):
+	#hit an enemy or asteroid
+	if (area.has_method("destroy")):
+		#duck typing at it's best
+		area.destroy()
+		_hit_something()
+	
+	
+	pass 
+
+
+func _on_shot_body_enter( body ):
+	#hit the tilemap
+	_hit_something()
+	pass # replace with function body