replicating Glass Bubbles (Texscreen)

BackBufferCopy.tscn

[gd_scene load_steps=4 format=1]

[ext_resource path="res://bubble_shader.tres" type="Shader" id=1]
[ext_resource path="res://bubble.png" type="Texture" id=2]

[sub_resource type="CanvasItemMaterial" id=1]

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

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

transform/pos = Vector2( 482.908, 346.807 )
copy_mode = 1
rect = Rect2( -100, -100, 200, 200 )

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

material/material = SubResource( 1 )
transform/pos = Vector2( 1.6427, -2.90363 )
texture = ExtResource( 2 )

bubble_shader.tres

[gd_resource type="CanvasItemShader" format=1]

[resource]

_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
}



[gd_scene load_steps=3 format=1]

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

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

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 = 40.0
margin/bottom = 40.0
script/script = ExtResource( 1 )

[node name="TextureFrame" 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 = 40.0
margin/bottom = 40.0
texture = ExtResource( 2 )
stretch_mode = 0



extends Control

# class member variables go here, for example:
# var a = 2
# var b = "textvar"
var b

func _ready():
	b = preload( "BackBufferCopy.tscn" ).instance()
	add_child( b )
	set_process( true )
	pass


func _process(delta):
	b.set_pos( get_global_mouse_pos() )
[application]

name="lowrezjam_test_shader"
main_scene="res://Control.tscn"
icon="res://icon.png"

[display]

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


gen_mipmaps=false

[gd_scene load_steps=4 format=1]

[ext_resource path="res://bubble_shader.tres" type="Shader" id=1]
[ext_resource path="res://bubble.png" type="Texture" id=2]

[sub_resource type="CanvasItemMaterial" id=1]

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

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

transform/pos = Vector2( 482.908, 346.807 )
copy_mode = 1
rect = Rect2( -100, -100, 200, 200 )

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

material/material = SubResource( 1 )
transform/pos = Vector2( 1.6427, -2.90363 )
texture = ExtResource( 2 )



[gd_resource type="CanvasItemShader" format=1]

[resource]

_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
}

Control.tscn

[gd_scene load_steps=3 format=1]

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

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

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 = 40.0
margin/bottom = 40.0
script/script = ExtResource( 1 )

[node name="TextureFrame" 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 = 40.0
margin/bottom = 40.0
texture = ExtResource( 2 )
stretch_mode = 0

Controxl.gd

extends Control

# class member variables go here, for example:
# var a = 2
# var b = "textvar"
var b

func _ready():
	b = preload( "BackBufferCopy.tscn" ).instance()
	add_child( b )
	set_process( true )
	pass


func _process(delta):
	b.set_pos( get_global_mouse_pos() )

engine.cfg

[application]

name="lowrezjam_test_shader"
main_scene="res://Control.tscn"
icon="res://icon.png"

[display]

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

icon.png.flags

gen_mipmaps=false