NegaLinear.shader

Shader "Custom/NegaLinear" {
		Properties{
		_MainTex ("Texture", 2D) = "white" {}
		_NegaOffs("NegaOffs",Range(-1,1))=1
	}
    SubShader {
        Pass {
            CGPROGRAM

            #include "UnityCG.cginc"

            #pragma vertex vert_img
            #pragma fragment frag
            sampler2D _MainTex;
            float _NegaOffs;


            fixed4 frag(v2f_img i) : COLOR{
            	fixed4 c = tex2D(_MainTex,i.uv);
            	float3 tex = float3(_NegaOffs,_NegaOffs,_NegaOffs)*(c.rgb-float3(0.5,0.5,0.5))+float3(0.5,0.5,0.5);
           	c.rgb = tex;
           	return c;
   
           	}
            ENDCG
        }
    }
}