add multi-color directory, for experimentation

project.godot

@@ -11,6 +11,7 @@ config_version=5
 [application]
 
 config/name="simple starfield"
+config/tags=PackedStringArray("experiment", "git_managed", "project_elysium")
 config/features=PackedStringArray("4.5", "Forward Plus")
 config/icon="res://icon.svg"
 

src/mono-color-starfield/starfield_texture.tscn

@@ -1,6 +1,6 @@
 [gd_scene load_steps=9 format=3 uid="uid://bcvjq6tdfp34q"]
 
-[ext_resource type="Shader" uid="uid://bm2uwshby7iak" path="res://src/starfield_texture.gdshader" id="1_40a2p"]
+[ext_resource type="Shader" uid="uid://bm2uwshby7iak" path="res://src/mono-color-starfield/starfield_texture.gdshader" id="1_40a2p"]
 
 [sub_resource type="Shader" id="Shader_40a2p"]
 code = "shader_type canvas_item;

src/multi-color-starfield/mc_fast_noise.tres

@@ -0,0 +1,5 @@
+[gd_resource type="FastNoiseLite" format=3 uid="uid://w4lmtnx0twag"]
+
+[resource]
+seed = 250
+frequency = 0.4687

src/multi-color-starfield/mc_starfield.gdshader

@@ -0,0 +1,30 @@
+shader_type canvas_item;
+
+uniform vec2 resolution = vec2(1270, 720);
+uniform sampler2D noise_texture: filter_nearest, repeat_enable;
+uniform float density: hint_range(1.0, 100.0, 0.1) = 20.0;
+uniform float speed_x: hint_range(-100.0, 100, 0.1) = 0.005;
+uniform float speed_y: hint_range(-100.0, 100, 0.1) = 0.0;
+uniform float layers: hint_range(1, 10, 1) = 5;
+uniform vec4 color_1: source_color;
+uniform vec4 color_2: source_color;
+uniform vec4 color_3: source_color;
+uniform vec4 color_4: source_color;
+
+float rand(vec2 uv) {
+	return fract(sin(dot(uv.xy, vec2(12.9898,78.233))) * 43758.5453123);
+}
+
+void fragment() {
+	vec2 uv = UV;
+	uv.x *= resolution.x / resolution.y;
+	vec2 speed = TIME * vec2(speed_x, speed_y);
+	float stars = 0.0;
+	for(float i = 0.0; i < layers; i++){
+		float shift = i * 0.3;
+		float brightness = 1.0 - i * 0.2;
+		stars += step(0.2, pow(texture(noise_texture, uv + shift + speed * (1.0 - i * 0.1)).r, density)) * brightness;
+	}
+	
+	COLOR = vec4(vec3(stars), 1.0);
+}

src/multi-color-starfield/mc_starfield.gdshader.uid

@@ -0,0 +1 @@
+uid://co0aqe5andoug

src/multi-color-starfield/mc_starfield_material.tres

@@ -0,0 +1,6 @@
+[gd_resource type="ShaderMaterial" load_steps=2 format=3 uid="uid://bgb22q7b2j1st"]
+
+[ext_resource type="Shader" uid="uid://co0aqe5andoug" path="res://src/multi-color-starfield/mc_starfield.gdshader" id="1_4pffc"]
+
+[resource]
+shader = ExtResource("1_4pffc")

src/multi-color-starfield/multi_color_starfield.tscn

@@ -0,0 +1,17 @@
+[gd_scene load_steps=2 format=3 uid="uid://c6f75hdvqpfaf"]
+
+[ext_resource type="Material" uid="uid://bgb22q7b2j1st" path="res://src/multi-color-starfield/mc_starfield_material.tres" id="1_yileu"]
+
+[node name="MultiColorStarfield" type="Control"]
+layout_mode = 3
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+
+[node name="ColorRect" type="ColorRect" parent="."]
+material = ExtResource("1_yileu")
+layout_mode = 0
+offset_right = 1270.0
+offset_bottom = 720.0

src/multi-color-starfield/new_noise_texture_2d.tres

@@ -0,0 +1,6 @@
+[gd_resource type="NoiseTexture2D" load_steps=2 format=3 uid="uid://dgorxcmpu6tma"]
+
+[ext_resource type="FastNoiseLite" uid="uid://w4lmtnx0twag" path="res://src/multi-color-starfield/mc_fast_noise.tres" id="1_vlauu"]
+
+[resource]
+noise = ExtResource("1_vlauu")