【吃鸡】毒圈展示

<1>2种圈，1个场景，1个UI

<2>场景毒圈

美术制作圆柱形网格，上下剔除，圆柱侧面面越多越好(内存渲染会多占用点)

shader实现：UV动画(写得不好)

Shader "wk/Particles/AdditiveGas" {
Properties {
	_TintColor ("Tint Color", Color) = (0.5,0.5,0.5,0.5)
	_MainTex ("Particle Texture", 2D) = "white" {}
	_FlashTex ("Flash Texture", 2D) = "white" {}
	_InvFade ("Soft Particles Factor", Range(0.01,3.0)) = 1.0
}

Category {
	Tags { "Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent" }
	Blend SrcAlpha One
	AlphaTest Greater .01
	ColorMask RGB
	Cull Off Lighting Off ZWrite Off Fog { Color (0,0,0,0) }
	BindChannels {
		Bind "Color", color
		Bind "Vertex", vertex
		Bind "TexCoord", texcoord
	}
	
	// ---- Fragment program cards
	SubShader {
		Pass {
		
			CGPROGRAM
			#pragma vertex vert
			#pragma fragment frag
			#pragma fragmentoption ARB_precision_hint_fastest
			#pragma multi_compile_particles

			#include "UnityCG.cginc"

			sampler2D _MainTex;
			sampler2D _FlashTex;			
			float4 _TintColor;
			
			struct appdata_t {
				float4 vertex : POSITION;
				float4 color : COLOR;
				float2 texcoord : TEXCOORD0;
			};

			struct v2f {
				float4 vertex : POSITION;
				float4 color : COLOR;
				float2 texcoord : TEXCOORD0;
//				#ifdef SOFTPARTICLES_ON
//				float4 projPos : TEXCOORD1;
//				#endif
			};
			
			float4 _MainTex_ST;

			v2f vert (appdata_t v)
			{
				v2f o;
				o.vertex = mul(UNITY_MATRIX_MVP, v.vertex);
//				#ifdef SOFTPARTICLES_ON
//				o.projPos = ComputeScreenPos (o.vertex);
//				COMPUTE_EYEDEPTH(o.projPos.z);
//				#endif
				o.color = v.color;
				o.texcoord = TRANSFORM_TEX(v.texcoord,_MainTex);
				return o;
			}

			sampler2D _CameraDepthTexture;
			float _InvFade;
			
			fixed4 frag (v2f i) : COLOR
			{
//				#ifdef SOFTPARTICLES_ON
//				float sceneZ = LinearEyeDepth (UNITY_SAMPLE_DEPTH(tex2Dproj(_CameraDepthTexture, UNITY_PROJ_COORD(i.projPos))));
//				float partZ = i.projPos.z;
//				float fade = saturate (_InvFade * (sceneZ-partZ));
//				i.color.a *= fade;
//				#endif			
				float2 uvs =  i.texcoord * 100+_Time.x;//mian
				float2 uv =  i.texcoord + _Time.x/2;//Flash
				float2 uv1 = float2(uv.x,uv.y);// float2(fract(uv.x),fract(uv.y));
				float2 uv2 =  float2(uvs.x,uvs.y);
				float4 col = tex2D(_FlashTex,  uv1 );
				col.a *= 4;
				col.g *= 4;
				return 4f  * _TintColor  * tex2D(_MainTex, uv2)  * col;
			}
			ENDCG 
		}
	} 	
	
	// ---- Dual texture cards
	SubShader {
		Pass {
			SetTexture [_MainTex] {
				constantColor [_TintColor]
				combine constant * primary
			}
			SetTexture [_MainTex] {
				combine texture * previous DOUBLE
			}
		}
	}
	
	// ---- Single texture cards (does not do color tint)
	SubShader {
		Pass {
			SetTexture [_MainTex] {
				combine texture * primary
			}
		}
	}
}
}

　　

<3>UI毒圈

UI有一个毒圈范围和一个安全区范围显示在地图上

试了一些办法，还是用Shader实现

计算好半径，设置Shader属性

Shader "UI/UI-Circle" 
{
	Properties
	{
		//[PerRendererData] _MainTex ("Sprite Texture", 2D) = "white" {}
		_Color ("Tint", Color) = (1,1,1,1)
		
		_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


	
		_CircleWidth("Cull Radius",Float) = 0.49

		_ColorMask ("Color Mask", Float) = 15
	}

	SubShader
	{
		Tags
		{ 
			"Queue"="Transparent" 
			"IgnoreProjector"="True" 
			"RenderType"="Transparent" 
			"PreviewType"="Plane"
			"CanUseSpriteAtlas"="True"
		}
		
		Stencil
		{
			Ref [_Stencil]
			Comp [_StencilComp]
			Pass [_StencilOp] 
			ReadMask [_StencilReadMask]
			WriteMask [_StencilWriteMask]
		}

		Cull Off
		Lighting Off
		ZWrite Off
		ZTest [unity_GUIZTestMode]
		Fog { Mode Off }
		Blend SrcAlpha OneMinusSrcAlpha
		ColorMask [_ColorMask]

		Pass
		{
		CGPROGRAM
			#pragma vertex vert
			#pragma fragment frag
			#include "UnityCG.cginc"
			
			struct appdata_t
			{
				float4 vertex   : POSITION;
				float4 color    : COLOR;
				float2 texcoord : TEXCOORD0;
			};

			struct v2f
			{
				float4 vertex   : SV_POSITION;
				fixed4 color    : COLOR;
				half2 texcoord  : TEXCOORD0;
			};
			
			fixed4 _Color;
			float _CircleWidth;

			v2f vert(appdata_t IN)
			{
				v2f OUT;
				OUT.vertex = mul(UNITY_MATRIX_MVP, IN.vertex);
				OUT.texcoord = IN.texcoord;
#ifdef UNITY_HALF_TEXEL_OFFSET
				OUT.vertex.xy += (_ScreenParams.zw-1.0)*float2(-1,1);
#endif
				OUT.color = IN.color * _Color;
				return OUT;
			}

			//sampler2D _MainTex;

			fixed4 frag(v2f IN) : SV_Target
			{
			    float2  uv = IN.texcoord;
                half4 color = IN.color;
				float len = length(float2(0.5,0.5)-uv);
				if(len<_CircleWidth || len>0.5){
				    color.a = 0;
				}
				clip (color.a - 0.01);
				return color;
			}
		ENDCG
		}
	}
}