圖片.png

圖片.png

// 遮罩shader

Shader "Custom/CircleMask" {
    Properties{
        _MainTex("MainTex", 2D) = "white" {}
    _MaskTex("MaskTex", 2D) = "white" {}
    [HideInInspector]_Cutoff("Alpha cutoff", Range(0,1)) = 0.5

        //MASK SUPPORT ADD
        _StencilComp("Stencil Comparison", Float) = 8
        _Stencil("Stencil ID", Float) = 0
        _StencilOp("Stencil Operation", Float) = 0
        _StencilWriteMask("Stencil Write Mask", Float) = 255
        _StencilReadMask("Stencil Read Mask", Float) = 255
        _ColorMask("Color Mask", Float) = 15
        //MASK SUPPORT END
    }
        SubShader{
        Tags{
        "IgnoreProjector" = "True"
        "Queue" = "Transparent"
        "RenderType" = "Transparent"
    }
        //MASK SUPPORT ADD
        Stencil
    {
        Ref[_Stencil]
        Comp[_StencilComp]
        Pass[_StencilOp]
        ReadMask[_StencilReadMask]
        WriteMask[_StencilWriteMask]
    }
        ColorMask[_ColorMask]
        //MASK SUPPORT END
        Pass{
        Name "FORWARD"
        Tags{
        "LightMode" = "ForwardBase"
    }
        Blend SrcAlpha OneMinusSrcAlpha
        ZWrite Off

        CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#define UNITY_PASS_FORWARDBASE
#include "UnityCG.cginc"
#pragma multi_compile_fwdbase
#pragma only_renderers d3d9 d3d11 glcore gles
#pragma target 3.0
        uniform sampler2D _MainTex; uniform float4 _MainTex_ST;
    uniform sampler2D _MaskTex; uniform float4 _MaskTex_ST;
    struct VertexInput {
        float4 vertex : POSITION;
        float2 texcoord0 : TEXCOORD0;
    };
    struct VertexOutput {
        float4 pos : SV_POSITION;
        float2 uv0 : TEXCOORD0;
    };
    VertexOutput vert(VertexInput v) {
        VertexOutput o = (VertexOutput)0;
        o.uv0 = v.texcoord0;
        o.pos = UnityObjectToClipPos(v.vertex);
        return o;
    }
    float4 frag(VertexOutput i) : COLOR{
        ////// Lighting:
        float4 _MainTex_var = tex2D(_MainTex,TRANSFORM_TEX(i.uv0, _MainTex));
        float3 finalColor = _MainTex_var.rgb;
        float4 _MaskTex_var = tex2D(_MaskTex,TRANSFORM_TEX(i.uv0, _MaskTex));
        return fixed4(finalColor,_MaskTex_var.a);
    }
        ENDCG
    }
    }
        FallBack "Diffuse"
}