擾動(dòng)
直接對(duì)uv進(jìn)行變換就可以了，記得首先把六邊形格子地圖的Tilling調(diào)高點(diǎn) 先預(yù)先調(diào)成合適大小的六邊形，然后repeat鋪滿整個(gè)護(hù)盾

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// Tiles and offsets the value of input UV by the inputs Tiling and Offset respectively.
// This is commonly used for detail maps and scrolling textures over Time.
void Unity_TilingAndOffset_float(float2 UV, float2 Tiling, float2 Offset, out float2 Out)
{
Out = UV * Tiling + Offset;
}
直接在vertex著色器中對(duì)appdata傳進(jìn)來(lái)的uv進(jìn)行變動(dòng)，兩者 offset的變動(dòng)頻率不同

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v2f vert (appdata v)
{
v2f o;
o.vertex = UnityObjectToClipPos(v.vertex);
half2 uv = TRANSFORM_TEX(v.uv, _MainTex);
Unity_TilingAndOffset_float(uv, half2(1, 1), half2(0, -_Time.y), o.uv);
Unity_TilingAndOffset_float(uv, half2(1, 1), half2(0, -_Time.y * 2), o.uvGlow);

float3 worldPos = mul(unity_ObjectToWorld, v.vertex).xyz; o.worldViewDir = normalize(UnityWorldSpaceViewDir(worldPos));o.worldNormal = UnityObjectToWorldNormal(v.normal);return o;}

護(hù)盾邊緣光
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struct appdata
{
float4 vertex : POSITION;
float2 uv : TEXCOORD0;
float3 normal : NORMAL;
};

struct v2f{float2 uv : TEXCOORD0;float2 uvGlow : TEXCOORD1;float4 vertex : SV_POSITION;half3 worldNormal : TEXCOORD2;half3 worldViewDir : TEXCOORD3;};

vertex著色器
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v2f vert (appdata v)
{
v2f o;
o.vertex = UnityObjectToClipPos(v.vertex);
…
float3 worldPos = mul(unity_ObjectToWorld, v.vertex).xyz;

o.worldViewDir = normalize(UnityWorldSpaceViewDir(worldPos));o.worldNormal = UnityObjectToWorldNormal(v.normal);...return o;}

fragment著色器
先獲取世界坐標(biāo)系下的法線向量和世界坐標(biāo)系下攝像機(jī)到頂點(diǎn)的向量，1-點(diǎn)乘得到的值然后結(jié)合到最后的顏色輸出計(jì)算中，法線向量與攝像機(jī)到頂點(diǎn)的向量的所成夾角可視為從中心點(diǎn)向邊緣擴(kuò)散，角度越來(lái)越大，到邊緣區(qū)角度呈局部最大值

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half4 frag (v2f i) : SV_Target
{
…
half rim = pow(1 - abs(dot(normalize(i.worldNormal), normalize(i.worldViewDir))), _RimNum);

// 邊緣高光col = lerp(col, _LightColor, rim);...return col;}

全部代碼
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Shader “Unlit/ShieldForceField”
{
Properties
{
_MainTex (“Texture”, 2D) = “white” {}
[NoScaleOffset] _LightTex (“LightTex”, 2D) = “white” {}
_Hologram (“Hologram”, 2D) = “white” {}
[HDR] _LightColor (“LightColor”, Color) = (1, 1, 1, 1)
// 邊緣光幅度
_RimNum(“Rim” , Range(0 , 5)) = 1
}
SubShader
{
Tags
{
“RenderType” = “Transparent”
“Queue” = “Transparent”
“IgnoreProjector” = “True”
“ForceNoShadowCasting” = “True”
}

Blend SrcAlpha OneMinusSrcAlphaPass{CGPROGRAM#pragma vertex vert#pragma fragment frag#include "UnityCG.cginc"#include "../../../../../Assets/ShaderGraphic.cginc"sampler2D _MainTex, _LightTex, _Hologram;float4 _MainTex_ST;half4 _LightColor;float _RimNum;struct appdata{float4 vertex : POSITION;float2 uv : TEXCOORD0;float3 normal : NORMAL;};struct v2f{float2 uv : TEXCOORD0;float2 uvGlow : TEXCOORD1;float4 vertex : SV_POSITION;half3 worldNormal : TEXCOORD2;half3 worldViewDir : TEXCOORD3;};v2f vert (appdata v){v2f o;o.vertex = UnityObjectToClipPos(v.vertex);half2 uv = TRANSFORM_TEX(v.uv, _MainTex);Unity_TilingAndOffset_float(uv, half2(1, 1), half2(0, -_Time.y), o.uv);Unity_TilingAndOffset_float(uv, half2(1, 1), half2(0, -_Time.y * 2), o.uvGlow);float3 worldPos = mul(unity_ObjectToWorld, v.vertex).xyz; o.worldViewDir = normalize(UnityWorldSpaceViewDir(worldPos));o.worldNormal = UnityObjectToWorldNormal(v.normal);return o;}half4 frag (v2f i) : SV_Target{half4 col = tex2D(_MainTex, i.uv);half4 light = tex2D(_LightTex, i.uv);// light.rgb = light.r * _LightColor.rgb;light.rgb = _LightColor.rgb;col.rgb += light.rgb * _LightColor.a;half4 holoColor = tex2D(_Hologram, i.uvGlow);col += holoColor * 0.3;col.a = 0.5;half rim = pow(1 - abs(dot(normalize(i.worldNormal), normalize(i.worldViewDir))), _RimNum);// 邊緣高光col = lerp(col, _LightColor, rim);return col;}ENDCG} }

}

最后大功告成了，后續(xù)可能會(huì)繼續(xù)改進(jìn)一下（加上相交時(shí)會(huì)留下邊緣光）
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