unity中全息投影带贴图shader

Shader "Custom/Hologram" {
Properties{
_Color("Color", Color) = (1,1,1,1)
_ColorScale("Scale", Float) = 1
_ScaningAmount("Scaning Amount", Float) = 10
_ScaningSpeed("Scaning Speed", Float) = 1
_SplashLevel("Splash Level", Range(0, 1)) = 0
_SplashFrequency("Splash Frequency", Float) = 1
_MainTex("Base (RGB)", 2D) = "white" { }
_Illum("Illumin (A)", 2D) = "white" { }
}
SubShader{
Tags{ "RenderType" = "Transparent" "Queue" = "Transparent" "IgnoreProjector" = "True" "ForceNoShadowCasting" = "True" }
LOD 300
CGPROGRAM
#pragma surface surf Lambert

sampler2D _MainTex;
sampler2D _Illum;

struct Input {
float2 uv_MainTex;
float2 uv_Illum;
};

void surf(Input IN, inout SurfaceOutput o) {
fixed4 tex = tex2D(_MainTex, IN.uv_MainTex);
fixed4 c = tex * _Color;
o.Albedo = c.rgb;
o.Emission = c.rgb * tex2D(_Illum, IN.uv_Illum).a;
o.Alpha = c.a;
}
ENDCG

CGINCLUDE
#include "UnityCG.cginc"

fixed4 _Color;
float _ColorScale;
float _ScaningAmount;
float _ScaningSpeed;
fixed _SplashLevel;
float _SplashFrequency;

struct v2f {
float4 pos : SV_POSITION;
float4 srcPos : TEXCOORD0;
float3 worldNormal : TEXCOORD1;
float3 worldViewDir : TEXCOORD2;
};

v2f vert(appdata_base v) {
v2f o;
o.pos = UnityObjectToClipPos(v.vertex);
o.srcPos = ComputeScreenPos(o.pos);
o.worldNormal = UnityObjectToWorldNormal(v.normal);
o.worldViewDir = UnityWorldSpaceViewDir(v.vertex);
return o;
}

fixed4 frag(v2f i) : SV_TARGET{
fixed3 worldNormal = normalize(i.worldNormal);
fixed3 worldViewDir = normalize(i.worldViewDir);

// 视线和法线越平行，看到的全息投影越亮
fixed3 hologram = _Color.rgb * abs(dot(worldNormal, worldViewDir)) * _ColorScale;

// 计算扫描线的亮暗
float t = _Time.y;
fixed tDecimal = t - floor(t);
float splashFrequency = tDecimal * _SplashFrequency;

half y = (i.srcPos.y * _ScaningAmount) / i.srcPos.w + tDecimal * _ScaningSpeed;
half scaninglineY = floor(y);
half scaningScale = lerp(0, 1, abs((y - scaninglineY) - 0.5) * 2);

fixed4 finalColor = fixed4(hologram, _Color.a * scaningScale * lerp(1 - _SplashLevel, 1, splashFrequency - floor(splashFrequency)));
return finalColor;
}

ENDCG

Pass {
ZWrite Off
Blend SrcAlpha OneMinusSrcAlpha
Cull Front

CGPROGRAM

#pragma vertex vert
#pragma fragment frag

ENDCG
}

Pass {
ZWrite Off
Blend SrcAlpha One
Cull Back

CGPROGRAM

#pragma vertex vert
#pragma fragment frag

ENDCG
}
}
}