基于Unity实现像素化风格的着色器

Shader "MyShaderTest/SimplePixelationShader"
{
    Properties 
    {
        _MainTex ("Base (RGB)", 2D) = "white" {}
        _PixelAmount ("Pixel Amount", float) = 50
    }

    SubShader
    {
        ZTest Always Cull Off ZWrite Off

        Pass
        {
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            #include "UnityCG.cginc"

            sampler2D _MainTex;
            half4 _MainTex_TexelSize;
            float _PixelAmount;

            struct v2f
            {
                float4 vertex : SV_POSITION;
                half2 uv : TEXCOORD0;
            };


            v2f vert(appdata_img v)
            {
                v2f o;
                o.vertex = UnityObjectToClipPos(v.vertex);
                o.uv = v.texcoord;

                #if UNITY_UV_STARTS_AT_TOP
                    if (_MainTex_TexelSize.y < 0.0)
                    o.uv.y = 1.0 - o.uv.y;
                #endif

                return o;
            }


            fixed4 frag(v2f i) : SV_Target
            {
                fixed uv_X = floor(i.uv.x * _PixelAmount) / _PixelAmount;
                fixed uv_Y = floor(i.uv.y * _PixelAmount) / _PixelAmount;

                i.uv = half2(uv_X,uv_Y);

                fixed4 color = tex2D(_MainTex,i.uv);

                return fixed4(color.rgb,1);
            }

            ENDCG
        }		
    }
    FallBack Off
}

这是比较简单的实现方式，比上回的还要方便，用法也是一样。