Shader "_Test/Transparent With Depth Mask"
{
    Properties
    {
        _MainTex ("Main Texture", 2D) = "white" {}
        _DepthMask ("Depth Mask", 2D) = "white" {}
    }

    SubShader
    {
        Tags { "Queue" = "Transparent-1" }
        ZWrite Off

        Pass
        {
            Blend SrcAlpha OneMinusSrcAlpha    // alpha blending

            CGPROGRAM

            #pragma exclude_renderers flash gles ps3 xbox360
            #pragma fragmentoption ARB_precision_hint_fastest
            #pragma vertex vert
            #pragma fragment frag

            #include "UnityCG.cginc"


            // uniforms

            uniform sampler2D _MainTex;
            uniform float4 _MainTex_ST;


            // structs

            struct vertexInput
            {
                float4 vertex : POSITION;        // position in object coordinates
                float4 texcoord : TEXCOORD0;    // 0th set of texture coordinates (UV)
            };

            struct fragmentInput
            {
                float4 pos : SV_POSITION;
                half2 uv : TEXCOORD0;
            };


            // functions

            fragmentInput vert(vertexInput i)
            {
                fragmentInput o;

                o.pos = mul(UNITY_MATRIX_MVP, i.vertex);
                o.uv = TRANSFORM_TEX(i.texcoord, _MainTex);

                return o;
            }

            half4 frag(fragmentInput i) : COLOR
            {
                return tex2D(_MainTex, i.uv);
            }

            ENDCG

        } // end pass


        Pass
        {
            //Blend SrcAlpha OneMinusSrcAlpha    // alpha blending
            Blend Zero One

            ZWrite On

            CGPROGRAM

            #pragma exclude_renderers flash gles ps3 xbox360
            #pragma fragmentoption ARB_precision_hint_fastest
            #pragma vertex vert
            #pragma fragment frag

            #include "UnityCG.cginc"


            // uniforms

            uniform sampler2D _DepthMask;
            uniform float4 _DepthMask_ST;


            // structs

            struct vertexInput
            {
                float4 vertex : POSITION;        // position in object coordinates
                float4 texcoord : TEXCOORD0;    // 0th set of texture coordinates (UV)
            };

            struct fragmentInput
            {
                float4 pos : SV_POSITION;
                half2 uv : TEXCOORD1;
            };

            struct fragmentOutput
            {
                half4 color : COLOR;
                float depth : DEPTH;
            };


            // functions

            fragmentInput vert(vertexInput i)
            {
                fragmentInput o;

                o.pos = mul(UNITY_MATRIX_MVP, i.vertex);
                o.uv = TRANSFORM_TEX(i.texcoord, _DepthMask);

                return o;
            }

            fragmentOutput frag(fragmentInput i) : COLOR
            {
                fragmentOutput o;
                //o.color = half4(0.5, 0.5, 0.5, 0.0);
                o.color = half4(0.0);
                if (i.uv.x > 0.0)
                    o.depth = 0.0;
                else
                    o.depth = 1.0;
                return o;
            }

            ENDCG

        } // end pass

    }  // end SubShader



    FallBack "Diffuse"
}