【Shader】扭曲能量罩特效


Shader "Custom/ForceField"
{
Properties
{_Color("Color", Color) = (0,0,0,0)_NoiseTex("NoiseTexture", 2D) = "white" {}// 扭曲程度_DistortStrength("DistortStrength", Range(0,1)) = 0.2// 扭曲频率_DistortTimeFactor("DistortTimeFactor", Range(0,1)) = 0.2_RimStrength("RimStrength",Range(0, 10)) = 2_IntersectPower("IntersectPower", Range(0, 3)) = 2
}SubShader
{ZWrite OffCull OffBlend SrcAlpha OneMinusSrcAlphaTags{"RenderType" = "Transparent""Queue" = "Transparent"}GrabPass{"_GrabTempTex"}Pass
{CGPROGRAM
#pragma target 3.0
#pragma vertex vert
#pragma fragment frag#include "UnityCG.cginc"struct appdata
{float4 vertex : POSITION;float2 uv : TEXCOORD0;float3 normal : NORMAL;
};struct v2f
{float4 vertex : SV_POSITION;float2 uv : TEXCOORD0;float4 screenPos : TEXCOORD1;float4 grabPos : TEXCOORD2;float3 normal : NORMAL;float3 viewDir : TEXCOORD3;
};sampler2D _GrabTempTex;
float4 _GrabTempTex_ST;
sampler2D _NoiseTex;
float4 _NoiseTex_ST;
float _DistortStrength;
float _DistortTimeFactor;
float _RimStrength;
float _IntersectPower;sampler2D _CameraDepthTexture;v2f vert(appdata v)
{v2f o;o.vertex = UnityObjectToClipPos(v.vertex);o.grabPos = ComputeGrabScreenPos(o.vertex);o.uv = TRANSFORM_TEX(v.uv, _NoiseTex);o.screenPos = ComputeScreenPos(o.vertex);COMPUTE_EYEDEPTH(o.screenPos.z);o.normal = UnityObjectToWorldNormal(v.normal);o.viewDir = normalize(UnityWorldSpaceViewDir(mul(unity_ObjectToWorld, v.vertex)));return o;
}fixed4 _Color;fixed4 frag(v2f i) : SV_Target
{//获取已有的深度信息,此时的深度图里没有力场的信息//判断相交float sceneZ = LinearEyeDepth(SAMPLE_DEPTH_TEXTURE_PROJ(_CameraDepthTexture, UNITY_PROJ_COORD(i.screenPos)));float partZ = i.screenPos.z;float diff = sceneZ - partZ;float intersect = (1 - diff) * _IntersectPower;//圆环float3 viewDir = normalize(UnityWorldSpaceViewDir(mul(unity_ObjectToWorld, i.vertex)));float rim = 1 - abs(dot(i.normal, normalize(i.viewDir))) * _RimStrength;float glow = max(intersect, rim);//扭曲float4 offset = tex2D(_NoiseTex, i.uv - _Time.xy * _DistortTimeFactor);i.grabPos.xy -= offset.xy * _DistortStrength;fixed4 color = tex2Dproj(_GrabTempTex, i.grabPos);fixed4 col = _Color * glow + color;return col;}ENDCG
}
}
}

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