Godot 2.1 Useful notes

	GODOT
	#1. loading resources
	var res = load("res://robi.png") # resource is loaded when line is executed
	get_node("sprite").set_texture(res)
	func _ready():
	var res = preload("res://robi.png") # resource is loaded at compile time
	get_node("sprite").set_texture(res)
	#use preload when path is constant. it’s more optimal
	#use load when path is dynamic
	const Corner = preload("corner.gd") #load class to use it
	func _on_shoot():
	var bullet = preload("res://bullet.scn").instance()
	add_child(bullet)
	#spawn object to stage. load scene and call instance() method
	#2. paths
	path user:// that is always writable.
	path res:// point to project resources
	#3. root viewport
	get_tree().get_root() # access via scenemainloop #Viewport class
	get_node("/root") # access via absolute path #Viewport class
	#3a. root scene
	get_tree() #top of tree, #SceneTree class
	#4. change scene
	func _my_level_was_completed():
	get_tree().change_scene("res://levels/level2.scn")
	#get_tree().change_scene_to(scene_instance)
	#5. curr scene
	get_tree().get_current_scene()
	#6. collisions
	convex - выпуклый (fast)
	concave - вогнутый
	#7. positions
	Spatial -> Transform -> Local ~ get_global_transform().basis (3 X Vector3) + 1XVector3 is origin
	Transform -> Translation ~ get_global_transform().origin (converted)
	#8. area collision listeners
	func _on_Area2D_body_enter( body ):
	if body.is_in_group("enemies"):
	queue_free()
	func _on_coin_body_enter(body):
	if (not taken and body extends preload("res://player.gd")):
	taken = true
	func _on_Area2D_body_enter( body ):
	if body.get_name() == "player":
	queue_free()
	get_node("/root/world").collect_diamond()
	#9. extend script from base script
	extends "res://enemies/enemy.gd" #in the beginning of file
	#10. enable cantacts in rigid body
	extends RigidBody2D
	func _ready():
	set_contact_monitor( true )
	set_max_contacts_reported( 5 )
	connect("body_enter",self,"collion_now")
	#or add area, and collision shape to area, handle body_enter event on area then
	#11. animations
	one shot - plays one time
	mix node - play 2 animation in same time
	blend node - smoothly goes from one animation to another
	time scale - slowdown/insrease speed of animation
	transition - switch between animations
	time seek - play animation from new position (useful when need to play anim from first frame)
	# anim_tree.timeseek_node_seek("jump_seek", 0) #params in code only
	#12. add class definition
	const Pool = preload("res://com/brandonlamb/pool/pool.gd")
	var pool = Pool.new(BULLET_POOL_SIZE, BULLET_POOL_PREFIX, GreenBullet)
	#in pool.gd
	#define constructor
	func _init(size_, prefix_, scene_):
	#13. _ready fix
	func _notification(what):
	if (what == NOTIFICATION_INSTANCED):
	#all internal initialization, you can use get_node here to get internal nodes and object will be to some degree usable even if not added yet to scene tree
	#it's called after object construction, at this point object is not even inside scene tree
	#also it's called only once
	#add_hero()
	pass
	elif(what == NOTIFICATION_READY):
	#only parts that are dependent on outside world (on theparents etc/also called when reparented)
	#usually it's quite ok to update external references if object is reparented so it usually works ok without any further thinking
	#load_track(track_file)
	#add_first_bars()
	pass
	#14. randi()
	randi()%11+1 returns an int from 1 to 10
	randf()*11+1 returns a float from 1 to 10
	rand_range(1,11) returns a float from 1 to 10
	randi()%2 = { 0, 1 } range
	#15. cos ( a in radians ) !!!
	#16 number functions
	print(floor(2.3)) #2
	print(floor(2.9)) #2
	print(ceil(2.3)) #3
	print(ceil(2.9)) #3
	print(round(2.3)) #2
	print(round(2.9)) #3
	#16. tmp folder /Users/boom/.godot/tmp/
	#17. dir
	var dir = Directory.new()
	if !dir.dir_exists("user://Saves"):
	dir.open("user://")
	dir.make_dir("user://Saves")
	#18. dynamic texture
	var tex = ImageTexture.new()
	var img = Image()
	img.load("image.png")
	tex.create_from_image(img)
	#19. integrate array
	for pos in postions:
	#use it
	if not pos in positions:
	positions.append(pos)
	#20. compile engine
	cd godot-2.1
	scons platform=osx bits=64 tools=yes
	cp -r misc/dist/osx_tools.app ./Godot.app
	mkdir -p Godot.app/Contents/MacOS
	cp bin/godot.osx.tools.64 Godot.app/Contents/MacOS/Godot
	chmod +x Godot.app/Contents/MacOS/Godot
	#21
	show file in system file browser
	#var dir = Globals.globalize_path(stream.get_path())
	#dir = dir.substr(0, dir.find_last('/'))
	#OS.shell_open("file://" + dir)
	#22
	#print from back
	for i in range(notes.size()-1, -1, -1):
	print("index:", i, "value:", notes[i])
	#23
	#bubble sort
	var notes = [7,2,5,1]
	print("notes:", notes)
	for i in range(notes.size()-1, -1, -1):
	print("i:", i)
	for j in range(1,i+1,1):
	print("J:", j)
	if notes[j-1] > notes[j]:
	var temp = notes[j-1]
	notes[j-1] = notes[j]
	notes[j] = temp
	print("sorted notes:", notes)
	#24
	keyboard and touch display
	if (ie.type == InputEvent.KEY):
	if (Input.is_action_just_pressed("ui_left")):
	vehiclePos[0] = !vehiclePos[0];
	if (Input.is_action_just_pressed("ui_right")):
	vehiclePos[1] = !vehiclePos[1];
	if (ie.type == InputEvent.SCREEN_TOUCH && ie.pressed):
	if (ie.x < viewportSize.width/2):
	vehiclePos[0] = !vehiclePos[0];
	if (ie.x > viewportSize.width/2):
	vehiclePos[1] = !vehiclePos[1];
	#25
	String p_path
	p_path.c_str()
	#26. scons with verbose info
	scons p=iphone tools=no bits=64 target=debug arch=arm64 verbose=yes
	#27. scons multi process
	scons platform=x11 tools=no target=debug bits=64 -j 7
	#28 scons platform=x11 dev=yes
	#29 maybe linux bugfix
	What Godot version are you using? If compiling yourself, use `use_static_cpp=yes` when using such a recent GCC version to stay compatible with older system

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