StencilMaskID.shader

// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'

// MIT License
//
// Copyright (c) 2017 Noisecrime
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.


Shader "Stencils/Masks/StencilID"
{
    Properties
    {
        _Color("Main Color", Color) = (1,1,1,1)

        _StencilReferenceID("Stencil ID Reference Reference", Float) = 1
        [Enum(UnityEngine.Rendering.CompareFunction)]       _StencilComp("Stencil Comparison", Float)   = 8
        [Enum(UnityEngine.Rendering.StencilOp)]             _StencilOp("Stencil Operation", Float)      = 2
        _StencilWriteMask("Stencil Write Mask", Float)              = 255
        _StencilReadMask("Stencil Read Mask", Float)                = 255

        [Enum(UnityEngine.Rendering.Shader_ColorWriteMask)] _ColorMask("Color Mask", Float) = 0
        [MaterialToggle]                                    _ZWrite("ZWrite", Float) = 0
    }

    SubShader
    {
        Tags
        {
            "RenderType"        = "StencilMaskOpaque" 
            "Queue"             = "Geometry-100" 
            "IgnoreProjector"   = "True"
        }
    

        Pass
        {
            ZWrite [_ZWrite]
            ColorMask[_ColorMask]

            Stencil
            {
                Ref[_StencilReferenceID]
                Comp[_StencilComp]  // always
                Pass[_StencilOp]    // replace
                ReadMask[_StencilReadMask]
                WriteMask[_StencilWriteMask]
            }

            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag

            fixed4      _Color;

            struct appdata
            {
                float4 vertex : POSITION;
            };

            struct v2f
            {
                float4 pos : SV_POSITION;
            };

            v2f vert(appdata v)
            {
                v2f o;
                o.pos = UnityObjectToClipPos(v.vertex);
                return o;
            }

            half4 frag(v2f i) : COLOR
            {
                return _Color;
            }
            ENDCG
        }
    }
}


/*
Pass {
Cull Front
ZTest Less

CGPROGRAM
#pragma vertex vert
#pragma fragment frag
ENDCG
}

Pass {
Cull Back
ZTest Greater

CGPROGRAM
#pragma vertex vert
#pragma fragment frag
ENDCG
}

*/