garden_client/Assets/Resource/Shader/UIMask.shader

Shader "DashGame/UIMask"
{
	Properties
	{
		_MainTex("Texture", 2D) = "white" {}
	}

		SubShader
	{
		Tags
	{
		"Queue" = "Transparent"
		"IgnoreProjector" = "True"
		"RenderType" = "Transparent"
		"PreviewType" = "Plane"
		"CanUseSpriteAtlas" = "True"
	}

		Cull Off
		Lighting Off
		ZWrite Off
		ZTest[unity_GUIZTestMode]
		Blend SrcAlpha OneMinusSrcAlpha

		Pass
	{
		CGPROGRAM

#pragma vertex vert
#pragma fragment frag

#include "UnityUI.cginc"
#include "UnityCG.cginc"

	struct appdata
	{
		float2 uv : TEXCOORD0;
		float4 color : COLOR;
		float4 vertex : POSITION;
	};

	struct v2f
	{
		float2 uv : TEXCOORD0;
		float4 color : COLOR;
		float4 vertex : SV_POSITION;
		float4 screenPos : TEXCOORD1;
	};

	sampler2D _MainTex;
	float4 _MainTex_ST;
	float _RadiusX;
	float _RadiusY;
	float2 _Center;

	v2f vert(appdata v)
	{
		v2f o;

		o.vertex = UnityObjectToClipPos(v.vertex);
		o.screenPos = ComputeScreenPos(o.vertex);
		o.uv = TRANSFORM_TEX(v.uv, _MainTex);
		o.color = v.color;

		return o;
	}

	fixed4 frag(v2f i) : SV_Target
	{
		fixed4 col = tex2D(_MainTex, i.uv)*i.color;

		float x = i.screenPos.x - _Center.x;
		float y = i.screenPos.y - _Center.y;

		if (abs(x) < _RadiusX && abs(y) < _RadiusY)
		{
			col.a = 0;
		}

		return col;
	}
		ENDCG
	}
	}
}