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unitycoder/noisefx.shader

Created May 12, 2023 18:58
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  1. unitycoder created this gist May 12, 2023.
    72 changes: 72 additions & 0 deletions noisefx.shader
    View file
    Original file line number Diff line number Diff line change
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    Shader "Unlit/NoiseFX"
    {
    Properties
    {
    _MainTex("Texture", 2D) = "white" {}
    _NoiseTex("Noise Texture", 2D) = "white" {}
    _Tint("Tint Color", Color) = (1,1,1,1)
    }
    SubShader
    {
    Tags { "RenderType" = "Opaque" }
    //Blend SrcAlpha OneMinusSrcAlpha // Traditional transparency
    //Blend One OneMinusSrcAlpha // Premultiplied transparency
    Blend One One // Additive
    //Blend OneMinusDstColor One // Soft additive
    //Blend DstColor Zero // Multiplicative
    //Blend DstColor SrcColor // 2x multiplicative
    LOD 100

    Pass
    {
    CGPROGRAM
    #pragma vertex vert
    #pragma fragment frag

    #include "UnityCG.cginc"

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

    struct v2f
    {
    float2 uv : TEXCOORD0;
    float4 vertex : SV_POSITION;
    };

    sampler2D _MainTex;
    sampler2D _NoiseTex;
    float4 _MainTex_ST;
    float4 _Tint;

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

    fixed4 frag(v2f i) : SV_Target
    {
    float2 scroll = float2(0,frac(_Time.x));
    fixed2 noise = tex2D(_NoiseTex, i.uv - scroll).rg;
    //noise = smoothstep(noise.r, 0, 0.25);
    noise = smoothstep(0, 0.5, noise.r);

    //fixed4 col = tex2D(_MainTex, i.uv + noise * 0.1)*3;
    fixed4 col = tex2D(_MainTex, i.uv)*3;
    col.a *= noise.r+col.r;
    col.rgb = _Tint.rgb * col.a;

    col*=_Tint;

    return col;
    }
    ENDCG
    }
    }
    }