From fb97d172f42ae3682c03a743e28ab8297e674e81 Mon Sep 17 00:00:00 2001
From: Fabio Iotti <info@fabioiotti.com>
Date: Sat, 10 Aug 2024 08:54:21 +0200
Subject: [PATCH] Nebula background

---
 main.tscn                     |  5 ++++-
 scenes/nebula/nebula.gdshader | 14 ++++++++++++++
 scenes/nebula/nebula.tscn     | 24 ++++++++++++++++++++++++
 3 files changed, 42 insertions(+), 1 deletion(-)
 create mode 100644 scenes/nebula/nebula.gdshader
 create mode 100644 scenes/nebula/nebula.tscn

diff --git a/main.tscn b/main.tscn
index bf068b3..a922d8c 100644
--- a/main.tscn
+++ b/main.tscn
@@ -1,4 +1,4 @@
-[gd_scene load_steps=11 format=3 uid="uid://cdaf4bh0jaa45"]
+[gd_scene load_steps=12 format=3 uid="uid://cdaf4bh0jaa45"]
 
 [ext_resource type="PackedScene" uid="uid://dq00mi6jwsa1f" path="res://scenes/planet/planet.tscn" id="1_0p552"]
 [ext_resource type="Script" path="res://scripts/game_logic.gd" id="1_kb05v"]
@@ -8,6 +8,7 @@
 [ext_resource type="Script" path="res://scenes/player/local_player.gd" id="4_7rlmh"]
 [ext_resource type="Texture2D" uid="uid://dx1wjviioa8u5" path="res://icons/chip.svg" id="4_pgo63"]
 [ext_resource type="Script" path="res://ui.gd" id="7_khbdl"]
+[ext_resource type="PackedScene" uid="uid://dtlatmtuggp6x" path="res://scenes/nebula/nebula.tscn" id="7_sv4lv"]
 [ext_resource type="PackedScene" uid="uid://cpffyaoh8x5bp" path="res://scenes/ships_fleet/ships_fleet.tscn" id="9_be18b"]
 [ext_resource type="PackedScene" uid="uid://ckfk1xgxfk1c3" path="res://scenes/trail/trail.tscn" id="10_b5ql7"]
 
@@ -37,6 +38,8 @@ script = ExtResource("2_plgh6")
 color = Color(0.835294, 0.160784, 0, 1)
 icon = ExtResource("4_pgo63")
 
+[node name="Nebula" parent="." instance=ExtResource("7_sv4lv")]
+
 [node name="Game" type="Node2D" parent="."]
 
 [node name="Planets" type="Node2D" parent="Game"]
diff --git a/scenes/nebula/nebula.gdshader b/scenes/nebula/nebula.gdshader
new file mode 100644
index 0000000..94c1be8
--- /dev/null
+++ b/scenes/nebula/nebula.gdshader
@@ -0,0 +1,14 @@
+shader_type canvas_item;
+
+uniform sampler2D noise: repeat_enable;
+
+float rand(vec2 co){
+    return fract(sin(dot(co, vec2(12.9898, 78.233))) * 43758.5453);
+}
+
+void fragment() {
+	vec3 nebula = vec3(texture(noise, FRAGCOORD.xy * .0005).r, texture(noise, FRAGCOORD.xy * .0005 + 0.1).r, texture(noise, FRAGCOORD.xy * .0005 + 0.2).r) * 0.05;
+	vec3 star = (rand(FRAGCOORD.xy * .01) < 0.1 && rand(FRAGCOORD.xy * .02) < .01) ? vec3(rand(FRAGCOORD.xy * .03)) : vec3(0.);
+
+	COLOR = vec4(nebula + star, 1.);
+}
diff --git a/scenes/nebula/nebula.tscn b/scenes/nebula/nebula.tscn
new file mode 100644
index 0000000..b48c073
--- /dev/null
+++ b/scenes/nebula/nebula.tscn
@@ -0,0 +1,24 @@
+[gd_scene load_steps=5 format=3 uid="uid://dtlatmtuggp6x"]
+
+[ext_resource type="Shader" path="res://scenes/nebula/nebula.gdshader" id="1_nqp0c"]
+
+[sub_resource type="FastNoiseLite" id="FastNoiseLite_8c2xm"]
+
+[sub_resource type="NoiseTexture2D" id="NoiseTexture2D_cukca"]
+width = 256
+height = 256
+seamless = true
+noise = SubResource("FastNoiseLite_8c2xm")
+
+[sub_resource type="ShaderMaterial" id="ShaderMaterial_y72ex"]
+shader = ExtResource("1_nqp0c")
+shader_parameter/noise = SubResource("NoiseTexture2D_cukca")
+
+[node name="Nebula" type="ColorRect"]
+material = SubResource("ShaderMaterial_y72ex")
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+mouse_filter = 2