Shader "Chromakey/Mask" {


    Properties {


        _MainTex ("Base (RGB)", 2D) = "white" {}


        //_MaskCol ("Mask Color", Color)  = (1.0, 0.0, 0.0, 1.0)


    }


 


    SubShader {
		Tags {"Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent"}
		LOD 100
		
		ZWrite Off
		Blend SrcAlpha OneMinusSrcAlpha 
	
	

        CGINCLUDE


            #include "UnityCG.cginc"


            


            half3 NormalizeColor (half3 color) {


                //return color / max(dot(color, half3(1.0f/3.0f)), 0.0001);


                return color / dot(color, fixed3(0.5,0.5,0.01));


            }


            


            half4 MaskColor (half3 mCol, half3 cCol) {


                //half4 d = distance(NormalizeColor(mCol.rgb), NormalizeColor(cCol.rgb));

				
							
				return ((mCol.g - (mCol.r + mCol.b)) > 0.10 ) ? half4(mCol.rgb,0.0) : half4(mCol.rgb,1.0);
  


            }


        ENDCG


 


        Pass {

			Lighting Off
            //Cull Off ZWrite On Lighting Off Fog { Mode off } 
            //Blend SrcAlpha OneMinusSrcAlpha


            


            CGPROGRAM


                #pragma vertex vert_img


                #pragma fragment frag


                #pragma fragmentoption ARB_precision_hint_fastest


 


                uniform sampler2D _MainTex;


                uniform float4 _MaskCol;


 


                half4 frag (v2f_img i) : COLOR {


                    half4 col = tex2D(_MainTex, i.uv);


                    half4 mask = MaskColor(col.rgb, _MaskCol.rgb);


                    //return col * mask;


                    return mask;


                }


            ENDCG


        }


    }


    Fallback off


}