Glass Bubbles (Texscreen)

bubbles.gd

extends Control

# Member variables
const MAX_BUBBLES = 10


func _ready():
	for i in range(MAX_BUBBLES):
		var bubble = preload("res://lens.tscn").instance()
		add_child(bubble)

bubbles.tscn

[gd_scene load_steps=3 format=1]

[ext_resource path="res://bubbles.gd" type="Script" id=1]
[ext_resource path="res://burano.png" type="Texture" id=2]

[node name="texscreen_demo" type="Control"]

anchor/right = 1
anchor/bottom = 1
focus/ignore_mouse = false
focus/stop_mouse = true
size_flags/horizontal = 2
size_flags/vertical = 2
margin/left = 0.0
margin/top = 0.0
margin/right = 0.0
margin/bottom = 0.0
script/script = ExtResource( 1 )

[node name="burano" type="TextureFrame" parent="."]

focus/ignore_mouse = true
focus/stop_mouse = true
size_flags/horizontal = 2
size_flags/vertical = 2
margin/left = 0.0
margin/top = 0.0
margin/right = 800.0
margin/bottom = 600.0
texture = ExtResource( 2 )
stretch_mode = 0

engine.cfg

[application]

name="Glass Bubbles (Texscreen)"
main_scene="res://bubbles.tscn"
icon="res://icon.png"

[display]

width=800
height=600
stretch_mode="2d"
stretch_aspect="keep"

lens.gd

extends BackBufferCopy

# Member variables
const MOTION_SPEED = 150

var vsize
var dir


func _process(delta):
	var pos = get_pos() + dir*delta*MOTION_SPEED
	
	if (pos.x < 0):
		dir.x = abs(dir.x)
	elif (pos.x > vsize.x):
		dir.x = -abs(dir.x)
	
	if (pos.y < 0):
		dir.y = abs(dir.y)
	elif (pos.y > vsize.y):
		dir.y = -abs(dir.y)
	
	set_pos(pos)


func _ready():
	vsize = get_viewport_rect().size
	var pos = vsize*Vector2(randf(), randf())
	set_pos(pos)
	dir = Vector2(randf()*2.0 - 1, randf()*2.0 - 1).normalized()
	set_process(true)

lens.tscn

[gd_scene load_steps=5 format=1]

[ext_resource path="res://lens.gd" type="Script" id=1]
[ext_resource path="res://bubble.png" type="Texture" id=2]

[sub_resource type="CanvasItemShader" id=1]

_code = {
"fragment": "vec4 normal = tex(TEXTURE,UV);
vec2 offset = normal.xy * 2.0 - vec2(1.0);
COLOR.rgb=texscreen(SCREEN_UV+offset*0.03);
COLOR.a=normal.a;
COLOR.rgb*=vec3(1.0,0.8,0.7);
",
"fragment_ofs": 0,
"light": "",
"light_ofs": 0,
"vertex": "",
"vertex_ofs": 0
}

[sub_resource type="CanvasItemMaterial" id=2]

shader/shader = SubResource( 1 )
shader/shading_mode = 0

[node name="glass" type="BackBufferCopy"]

transform/pos = Vector2( 482.908, 346.807 )
transform/scale = Vector2( 1.31289, 1.34009 )
copy_mode = 1
rect = Rect2( -100, -100, 200, 200 )
script/script = ExtResource( 1 )

[node name="lens" type="Sprite" parent="."]

material/material = SubResource( 2 )
transform/pos = Vector2( 1.6427, -2.90363 )
texture = ExtResource( 2 )