Unityのshaderで動く雲っぽいやつ

いつもどうやってつくるんだったっけってなるので記録を残しておく

コード

qiita.glsl

Shader "Unlit/KUMO"
{
    Properties
    {
        _MainTex ("Texture", 2D) = "white" {}
    }
    SubShader
    {
        Tags { "RenderType"="Opaque" }
        LOD 100

        Pass
        {
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            // make fog work
            #pragma multi_compile_fog

            #include "UnityCG.cginc"

            struct appdata
            {
                float4 vertex : POSITION;
                float2 uv : TEXCOORD0;
            };

            struct v2f
            {
                float2 uv : TEXCOORD0;
                UNITY_FOG_COORDS(1)
                float4 vertex : SV_POSITION;
            };

            sampler2D _MainTex;
            float4 _MainTex_ST;

            float Circle(float2 p){
                p*= 10.0;

                return ((p.x*p.x+p.y*p.y)-10);
            }

            v2f vert (appdata v)
            {
                v2f o;
                o.vertex = UnityObjectToClipPos(v.vertex);
                o.uv = TRANSFORM_TEX(v.uv, _MainTex);
                UNITY_TRANSFER_FOG(o,o.vertex);
                return o;
            }

            float rand(float3 co)
{
return frac(sin(dot(co.xyz, float3(12.9898, 78.233, 56.787))) * 43758.5453);
}

            float rings(float2 p){
                return sin(length(p)*100);
            }

            float noise(float3 pos)
{
float3 ip = floor(pos);
float3 fp = smoothstep(0, 1, frac(pos));
float4 a = float4(
rand(ip + float3(0, 0, 0)),
rand(ip + float3(1, 0, 0)),
rand(ip + float3(0, 1, 0)),
rand(ip + float3(1, 1, 0)));
float4 b = float4(
rand(ip + float3(0, 0, 1)),
rand(ip + float3(1, 0, 1)),
rand(ip + float3(0, 1, 1)),
rand(ip + float3(1, 1, 1)));
a = lerp(a, b, fp.z);
a.xy = lerp(a.xy, a.zw, fp.y);
return lerp(a.x, a.y, fp.x);
}

            float perlin(float3 pos,float time){
            return 
(noise(pos) +
noise(pos * 2 ) +
noise(pos * 4) +
noise(pos * 8) +
noise(pos * 16-time) +
noise(pos * 32+time) ) / 6;
}


            fixed4 frag (v2f i) : SV_Target
            {

                float s = _Time*10;



               float2 m = i.uv+perlin (float3(_Music*10,_Music*10,0),s);
               float4 col = float4(0,0,1,1)+float4(perlin (float3(i.uv,0),s),perlin (float3(i.uv,0),s),perlin (float3(i.uv,0),s),1);

               return col;
                }



            ENDCG
        }
    }
}

パーリンノイズでいい感じにしてあげてあとは動かす！

終わり