garden_client/Assets/Resource/Shader/Mask.shader

Shader "DashGame/Mask"
{
	Properties
	{
		[PerRendererData] _MainTex("Sprite Texture", 2D) = "white" {}
		_Color("Tint", Color) = (1,1,1,1)
		[MaterialToggle] PixelSnap("Pixel snap", Float) = 0
	}

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

		Cull Off
		Lighting Off
		ZWrite Off

		Pass
	{
		Blend SrcAlpha OneMinusSrcAlpha

		CGPROGRAM

#pragma vertex vert
#pragma fragment frag

#pragma multi_compile _ PIXELSNAP_ON
#pragma multi_compile _ ETC1_EXTERNAL_ALPHA

#include "UnityCG.cginc"

	struct appdata_t
	{
		float4 vertex   : POSITION;
		float4 color    : COLOR;
		float2 texcoord : TEXCOORD0;
	};

	struct v2f
	{
		fixed4 color : COLOR;
		float4 vertex   : SV_POSITION;
		float4 screenPos   : TEXCOORD1;
		float2 texcoord  : TEXCOORD0;
	};

	float _Angle;
	float _RadiusX;
	float _RadiusY;
	float2 _Center;
	fixed4 _Color;

	v2f vert(appdata_t IN)
	{
		v2f OUT;

		OUT.vertex = UnityObjectToClipPos(IN.vertex);
		OUT.screenPos = ComputeScreenPos(OUT.vertex);
		OUT.texcoord = IN.texcoord;
		OUT.color = IN.color * _Color;

		return OUT;
	}

	sampler2D _MainTex;

	fixed4 SampleSpriteTexture(float2 uv)
	{
		fixed4 color = tex2D(_MainTex, uv);

		return color;
	}

	fixed4 frag(v2f i) : SV_Target
	{
		fixed4 col = SampleSpriteTexture(i.texcoord) * i.color;

	//_Center = float2(0.5,0.5);
	_Angle = _RadiusY / 4;
	//_RadiusX = 0.2;
	//_RadiusY = 0.2;

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

	if (abs(x) < _RadiusX && abs(y) < _RadiusY)
	{
		float2 ulo = _Center + float2(-_RadiusX, _RadiusY);
		float2 uli = ulo + float2(_Angle, -_Angle / (_ScreenParams.y / _ScreenParams.x));

		float2 uro = _Center + float2(_RadiusX, _RadiusY);
		float2 uri = uro + float2(-_Angle, -_Angle / (_ScreenParams.y / _ScreenParams.x));

		float2 lro = _Center + float2(_RadiusX, -_RadiusY);
		float2 lri = lro + float2(-_Angle, _Angle / (_ScreenParams.y / _ScreenParams.x));

		float2 llo = _Center + float2(-_RadiusX, -_RadiusY);
		float2 lli = llo + float2(_Angle, _Angle / (_ScreenParams.y / _ScreenParams.x));

		float urox = uro.x - i.screenPos.x;
		float urix = i.screenPos.x - uri.x;
		float uroy = uro.y - i.screenPos.y;
		float uriy = i.screenPos.y - uri.y;

		float ulox = i.screenPos.x - ulo.x;
		float ulix = uli.x - i.screenPos.x;
		float uloy = ulo.y - i.screenPos.y;
		float uliy = i.screenPos.y - uli.y;

		float lrox = lro.x - i.screenPos.x;
		float lrix = i.screenPos.x - lri.x;
		float lroy = i.screenPos.y - lro.y;
		float lriy = lri.y - i.screenPos.y;

		float llox = i.screenPos.x - llo.x;
		float llix = lli.x - i.screenPos.x;
		float lloy = i.screenPos.y - llo.y;
		float lliy = lli.y - i.screenPos.y;

		if (ulox > 0 && ulix  > 0 && uloy > 0 && uliy > 0)
		{
			float2 vec = uli - i.screenPos;
			vec.y *= _ScreenParams.y / _ScreenParams.x;

			if (length(vec) < _Angle)
			{
				col.a = 0;
			}
		}
		else if (urox > 0 && urix  > 0 && uroy > 0 && uriy > 0)
		{
			float2 vec = uri - i.screenPos;
			vec.y *= _ScreenParams.y / _ScreenParams.x;

			if (length(vec) < _Angle)
			{
				col.a = 0;
			}
		}
		else if (lrox > 0 && lrix > 0 && lroy > 0 && lriy > 0)
		{
			float2 vec = lri - i.screenPos;
			vec.y *= _ScreenParams.y / _ScreenParams.x;

			if (length(vec) < _Angle)
			{
				col.a = 0;
			}
		}
		else if (llox > 0 && llix  > 0 && lloy > 0 && lliy > 0)
		{
			float2 vec = lli - i.screenPos;
			vec.y *= _ScreenParams.y / _ScreenParams.x;

			if (length(vec) < _Angle)
			{
				col.a = 0;
			}
		}
		else
		{
			col.a = 0;
		}
	}

	return col;
	}
		ENDCG
	}
	}
}