Retro VFX! (also airboarder works now) (#780)

* Super Retro VFX!

* Updated Screen Jump default

* also airboarder works now

---------

Co-authored-by: minenice55 <star.elementa@gmail.com>

Assets/X-PostProcessing/Effects/PixelizeCircle/Shader/PixelizeCircle.shader

@@ -0,0 +1,75 @@
+//----------------------------------------------------------------------------------------------------------
+// X-PostProcessing Library
+// https://github.com/QianMo/X-PostProcessing-Library
+// Copyright (C) 2020 QianMo. All rights reserved.
+// Licensed under the MIT License 
+// You may not use this file except in compliance with the License.You may obtain a copy of the License at
+// http://opensource.org/licenses/MIT
+//----------------------------------------------------------------------------------------------------------
+
+Shader "Hidden/X-PostProcessing/PixelizeCircle"
+{
+	SubShader
+	{
+		Cull Off ZWrite Off ZTest Always
+		
+		Pass
+		{
+			HLSLPROGRAM
+			
+			#pragma vertex VertDefault
+			#pragma fragment Frag
+			
+			#include "../../../Shaders/StdLib.hlsl"
+			#include "../../../Shaders/XPostProcessing.hlsl"
+			
+			
+			
+			half4 _Params;
+			half2 _Params2;
+			half4 _BackgroundColor;
+
+			#define _PixelIntervalX _Params2.x
+			#define _PixelIntervalY _Params2.y
+
+
+			float4 CirclePixelize(float2 uv)
+			{
+				float pixelScale = 1.0 / _Params.x;
+
+				float ratio = _ScreenParams.y / _ScreenParams.x;
+				uv.x = uv.x / ratio;
+
+				//x和y坐标分别除以缩放系数，在用floor向下取整，再乘以缩放系数，得到分段UV
+				float2 coord = half2(_PixelIntervalX *  floor(uv.x / (pixelScale * _PixelIntervalX)), (_PixelIntervalY)* floor(uv.y / (pixelScale * _PixelIntervalY)));
+
+				//求解圆心坐标
+				float2 circleCenter = coord * pixelScale + pixelScale * 0.5;
+
+				//计算当前uv值隔圆心的距离，并乘以缩放系数
+				float dist = length(uv - circleCenter) * _Params.x;
+				//圆心坐标乘以缩放系数
+				circleCenter.x *= ratio;
+
+				//采样
+				float4 screenColor = SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, circleCenter);
+
+				//对于距离大于半径的像素，替换为背景色
+				if (dist > _Params.z)  screenColor = _BackgroundColor;
+
+				return screenColor;
+			}
+		
+			
+			
+			float4 Frag(VaryingsDefault i): SV_Target
+			{
+
+				return CirclePixelize(i.texcoord);
+			}
+			
+			ENDHLSL
+			
+		}
+	}
+}