当作一个小的练习，也折腾了好久，主要想要的效果是：点击后在点位位置有波动效果，再加上折射的效果，以及整个贴图纹理的向内旋转。
还有很多问题有待解决，如放在URP中时会提示HDR的问题，点击的波动还没有自动平息的问题等，这个暂时在这留个备份。
用smootstep控制旋涡大小的效果
有折射的效果
Shader "DongOpus/csDoor_HitAmin"
{
//传送门：触动+折射 2023.03.10
Properties
{
[HDR]_Color ("Main Color", Color) = (0, 0.15, 0.115, 1)
_MainTex ("基础贴图", 2D) = "white" {}
_WaveMap ("Wave Map", 2D) = "bump" {}
_Cubemap ("Environment Cubemap", Cube) = "_Skybox" {}
_WaveXSpeed ("Wave Horizontal Speed", Range(-0.1, 0.1)) = 0.01
_WaveYSpeed ("Wave Vertical Speed", Range(-0.1, 0.1)) = 0.01
_Distortion ("折射率", Range(8, 500)) = 30
_SpecularCol("高光颜色",Color)=(1,1,1,1)
_Gloss("Gloss",Range(8,256))=32
_RampTex("RampTex",2D)="white"{}
//触动
[Header(_____Chudong_____)]
[Space(20)]
_CdRandius("触动范围",Range(0,1))=0.5
_CdHardness("触动软化",Range(0,1))=0.7
//水波纹
_WaveA("波动力度",Range(0,1))=0.1
_R("波动范围",float)=0.2
_F("波动数量",float)=0.3
}
SubShader
{
Tags { "RenderType"="Opaque" "Queue"="Transparent" }
LOD 100
GrabPass { "_RefractionTex" }
Pass
{
Tags { "LightMode"="ForwardBase" }
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#include "UnityCG.cginc"
#include "Lighting.cginc"
#include "AutoLight.cginc"
#pragma multi_compile_fwdbase
struct appdata
{
float4 vertex : POSITION;
float3 normal : NORMAL;
float4 tangent : TANGENT;
float4 texcoord : TEXCOORD0;
};
struct v2f
{
float4 pos : SV_POSITION;
float4 scrPos : TEXCOORD0;
float4 uv : TEXCOORD1;
float4 TtoW0 : TEXCOORD2;
float4 TtoW1 : TEXCOORD3;
float4 TtoW2 : TEXCOORD4;
float2 rampUV:TEXCOORD5;
// SHADOW_COORDS(5)
// float3 lightDir:TEXCOORD5;
};
fixed4 _Color;
sampler2D _MainTex;
float4 _MainTex_ST;
sampler2D _WaveMap;
float4 _WaveMap_ST;
samplerCUBE _Cubemap;
sampler2D _RampTex;
float4 _RampTex_ST;
fixed _WaveXSpeed;
fixed _WaveYSpeed;
float _Distortion;
float4 _SpecularCol;
float _Gloss;
sampler2D _RefractionTex;
float4 _RefractionTex_TexelSize;
//触动接口
float _Disp;
float3 _HitPos;
float _CdRandius,_CdHardness;
float _WaveA,_R,_F;
//直角坐标系 转 极坐标
float2 Polar(float2 UV)
{
float2 uv = UV-0.5;
float distance=length(uv);
distance *=2;
float angle=atan2(uv.x,uv.y);
float angle01=angle/3.14159/2+0.5;
return float2(angle01,distance);
}
//水波纹
float2 WaveUV(float2 uv,float a,float rang,float f,float2 hitPos){
float2 waveuv=uv;
float dis=distance(waveuv,saturate(hitPos));
float scale=0;
a*=saturate(1-dis/rang);
scale=a*sin(-dis*3.14*f+_Time.y*10);
waveuv=waveuv +waveuv*scale;
return waveuv;
}
v2f vert (appdata v)
{
v2f o;
o.pos = UnityObjectToClipPos(v.vertex);
o.scrPos = ComputeGrabScreenPos(o.pos);
o.uv.xy = TRANSFORM_TEX(v.texcoord, _MainTex);
o.uv.zw = TRANSFORM_TEX(v.texcoord, _WaveMap);
o.rampUV = TRANSFORM_TEX(v.texcoord, _RampTex);
float3 worldPos = mul(unity_ObjectToWorld, v.vertex).xyz;
fixed3 worldNormal = UnityObjectToWorldNormal(v.normal);
fixed3 worldTangent = UnityObjectToWorldDir(v.tangent.xyz);
fixed3 worldBinormal = cross(worldNormal, worldTangent) * v.tangent.w;
o.TtoW0 = float4(worldTangent.x, worldBinormal.x, worldNormal.x, worldPos.x);
o.TtoW1 = float4(worldTangent.y, worldBinormal.y, worldNormal.y, worldPos.y);
o.TtoW2 = float4(worldTangent.z, worldBinormal.z, worldNormal.z, worldPos.z);
return o;
}
fixed4 frag (v2f i) : SV_Target
{
float3 worldPos = float3(i.TtoW0.w, i.TtoW1.w, i.TtoW2.w);
fixed3 viewDir = normalize(UnityWorldSpaceViewDir(worldPos));
float2 speed = _Time.y * float2(_WaveXSpeed, _WaveYSpeed);
float3 lightDir=normalize(_WorldSpaceLightPos0.xyz);
float2 polar_UV=Polar(i.uv);
//水纹UV
float3 Out = 1 - saturate((distance(worldPos, _HitPos) - _CdRandius) / (1 - _CdHardness));
float2 waveUv= WaveUV(i.uv.xy,_WaveA,_R,_F,Out);
float2 uvAmin=float2(0.3,0.3)*_Time.y;
fixed4 col=tex2D(_MainTex,polar_UV*_MainTex_ST.xy+_MainTex_ST.zw+uvAmin+waveUv);
fixed4 ramp=tex2D(_RampTex,i.rampUV+waveUv);
float4 rampValu=1- smoothstep(0.1,0.8,ramp);
col*=rampValu*_Color;
//法线贴图
fixed3 bump1 = UnpackNormal(tex2D(_WaveMap, i.uv.zw + speed+waveUv)).rgb;
fixed3 bump2 = UnpackNormal(tex2D(_WaveMap, i.uv.zw - speed+waveUv)).rgb;
fixed3 bump = normalize(bump1 + bump2);
float2 offset = bump.xy * _Distortion * _RefractionTex_TexelSize.xy;
i.scrPos.xy = offset * i.scrPos.z + i.scrPos.xy;
fixed3 refrCol = tex2D( _RefractionTex, i.scrPos.xy/i.scrPos.w).rgb;
bump = normalize(half3(dot(i.TtoW0.xyz, bump), dot(i.TtoW1.xyz, bump), dot(i.TtoW2.xyz, bump)));
//高光
fixed3 halfDir=normalize(viewDir+lightDir);
fixed3 specular=_LightColor0.rgb*_SpecularCol.rgb*pow(max(0,dot(bump,halfDir)),_Gloss);
//菲涅尔
fixed fresnel = pow(1 - saturate(dot(viewDir, bump)), 4);
fixed3 finalColor = fresnel + refrCol * (1 - fresnel);
return fixed4(col+finalColor, 1);
}
ENDCG
}
}
}