66 lines
1.6 KiB
Plaintext
66 lines
1.6 KiB
Plaintext
[gd_resource type="ShaderMaterial" load_steps=2 format=2]
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[sub_resource type="Shader" id=1]
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resource_local_to_scene = true
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code = "shader_type spatial;
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varying vec3 world_pos;
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uniform vec4 base_color : hint_color;
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uniform vec4 cloud_color : hint_color;
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//Van https://github.com/yiwenl/glsl-fbm/blob/master/3d.glsl
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float mod289f(float x){return x - floor(x * (1.0 / 289.0)) * 289.0;}
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vec4 mod289v4(vec4 x){return x - floor(x * (1.0 / 289.0)) * 289.0;}
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vec4 perm(vec4 x){return mod289v4(((x * 34.0) + 1.0) * x);}
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float noise1(vec3 p){
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vec3 a = floor(p);
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vec3 d = p - a;
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d = d * d * (3.0 - 2.0 * d);
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vec4 b = a.xxyy + vec4(0.0, 1.0, 0.0, 1.0);
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vec4 k1 = perm(b.xyxy);
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vec4 k2 = perm(k1.xyxy + b.zzww);
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vec4 c = k2 + a.zzzz;
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vec4 k3 = perm(c);
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vec4 k4 = perm(c + 1.0);
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vec4 o1 = fract(k3 * (1.0 / 41.0));
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vec4 o2 = fract(k4 * (1.0 / 41.0));
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vec4 o3 = o2 * d.z + o1 * (1.0 - d.z);
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vec2 o4 = o3.yw * d.x + o3.xz * (1.0 - d.x);
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return o4.y * d.y + o4.x * (1.0 - d.y);
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}
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float fbm1(vec3 x, float t) {
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float v = 0.0;
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float a = 0.5;
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vec3 shift = t*vec3(0.1);
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for (int i = 0; i < 5; ++i) {
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v += a * noise1(x*3.0);
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x = x * 2.0 + shift;
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a *= 0.5;
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}
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return v;
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}
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void vertex() {
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world_pos = VERTEX;
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}
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void fragment() {
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ALBEDO = mix(base_color.rgb, cloud_color.rgb, cloud_color.rgb*fbm1(world_pos, TIME));
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ALBEDO = base_color.rgb + cloud_color.rgb*fbm1(world_pos, TIME);
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}
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"
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[resource]
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shader = SubResource( 1 )
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shader_param/base_color = Color( 0.0745098, 0.215686, 0.419608, 1 )
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shader_param/cloud_color = Color( 0.580392, 0.580392, 0.580392, 1 )
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