なざわにき♂　用

Nega.shader

Shader "NazawaOssuOssu/Nega"
{
	Properties
	{
		_MainTex ("Texture", 2D) = "white" {}
		_Lerp("Lerp", RANGE(0, 1)) = 1
	}
	SubShader
	{
		Tags{"Queue"="Transparent"}

		Cull Off ZWrite Off
		Blend SrcAlpha OneMinusSrcAlpha

		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;
			};

			v2f vert (appdata v)
			{
				v2f o;
				o.vertex = UnityObjectToClipPos(v.vertex);
				o.uv = v.uv;
				return o;
			}
			
			sampler2D _MainTex;
			float _Lerp;

			float4 frag (v2f i) : SV_Target
			{
				float4 col = tex2D(_MainTex, i.uv);
				float4 nega = 1 - col;
				return float4(lerp(col.rgb, nega.rgb, _Lerp), col.a);
			}
			ENDCG
		}
	}
}