unity shader ---水箱水位线效果

应功能需求，要做一个透明水箱效果，并包含一个水位线，表示水位高度，找了一些资源整改了一下，接下来，上代码

效果：

shader：

Shader "Unlit/SpecialFX/Liquid"
{Properties//属性{_Tint("Tint", Color) = (1,1,1,1)_FillAmount("Fill Amount", Range(0,1)) = 0.0_WobbleX("WobbleX", Range(-1,1)) = 0.0_WobbleZ("WobbleZ", Range(-1,1)) = 0.0_TopColor("Top Color", Color) = (1,1,1,1)_FoamColor("Foam Line Color", Color) = (1,1,1,1)_Rim("Foam Line Width", Range(0,0.1)) = 0.0_RimColor("Rim Color", Color) = (1,1,1,1)_RimPower("Rim Power", Range(0,10)) = 0.0_CubeColor("CubeColor", color) = (1,1,1,1)_Width("Width", range(0,0.5)) = 0.1_Length("Length", range(0.5,1)) = 0.1_ScaleColor("ScaleColor", color) = (1,1,1,1)_ScaleWidth("ScaleLine Width", Range(0,0.1)) = 0.0_ScaleHight("ScaleLine Hight", range(0,1)) = 0.1}SubShader//着色器{Tags {"Queue" = "Transparent"  "DisableBatching" = "True" }Pass {Zwrite On//将像素的深度写入深度缓存中  Cull Off // 关闭阴影剔除AlphaToMask On // transparencyblend srcalpha oneminussrcalpha//渲染代码在CGPROGRAM和ENDCG之间CGPROGRAM#pragma vertex vert#pragma fragment frag			#pragma multi_compile_fog// make fog work#include "UnityCG.cginc"//引入Unity内置定义fixed4 _Tint;fixed4 _CubeColor;fixed4 _LineColor;fixed _Width;fixed _Length;float _FillAmount, _WobbleX, _WobbleZ;float4 _TopColor, _RimColor, _FoamColor, _ScaleColor;float _Rim, _RimPower, _ScaleWidth, _ScaleHight;struct v2f {float4 pos : SV_POSITION;float2 uv : TEXCOORD0;UNITY_FOG_COORDS(1)float3 viewDir : COLOR;float3 normal : COLOR2;float fillEdge : TEXCOORD2;float warningLine : TEXCOORD1;};struct appdata {float4 vertex : POSITION;float2 uv : TEXCOORD0;float3 normal : NORMAL;};float4 RotateAroundYInDegrees(float4 vertex, float degrees) {float alpha = degrees * UNITY_PI / 180;float sina, cosa;sincos(alpha, sina, cosa);float2x2 m = float2x2(cosa, sina, -sina, cosa);return float4(vertex.yz , mul(m, vertex.xz)).xzyw;}v2f vert(appdata v){v2f o;o.pos = UnityObjectToClipPos(v.vertex);o.uv = v.uv;UNITY_TRANSFER_FOG(o,o.pos);//获取世界坐标float3 worldPos = mul(unity_ObjectToWorld, v.vertex.xyz);// XY轴晃动float3 worldPosX = RotateAroundYInDegrees(float4(worldPos,0),360);// XZ轴晃动 float3 worldPosZ = float3 (worldPosX.y, worldPosX.z, worldPosX.x);// 结合旋转与worldPos，基于正弦波，脚本控制float3 worldPosAdjusted = worldPos + (worldPosX  * _WobbleX) + (worldPosZ* _WobbleZ);// 控制液体高度o.fillEdge = worldPosAdjusted.y + _FillAmount;o.warningLine = worldPos.y + _ScaleHight;o.viewDir = normalize(ObjSpaceViewDir(v.vertex));o.normal = v.normal;return o;}fixed4 frag(v2f i, fixed facing : VFACE) : SV_Target{fixed4 col = _Tint;//边框线  有待优化 理应不应使用if块if (((i.uv.x < _Width || i.uv.x > 1 - _Width) && (i.uv.y < 1 - _Length || i.uv.y > _Length)) || ((i.uv.y < _Width || i.uv.y > 1 - _Width) && (i.uv.x < 1 - _Length || i.uv.x > _Length))){col += _CubeColor;}//液位线float4 lineHight = step(i.warningLine,0.5) - step(i.warningLine, (0.5 -_ScaleWidth));float4 lineColored = lineHight * (_ScaleColor*0.9 );//烟雾效果UNITY_APPLY_FOG(i.fogCoord, col);//边缘高光float dotProduct = 1 - pow(dot(i.normal, i.viewDir), _RimPower);float4 RimResult = smoothstep(0.5, 1.0, dotProduct);RimResult *= _RimColor;// 液体表面float4 foam = step(i.fillEdge, 0.5) - step(i.fillEdge, (0.5 - _Rim));float4 foamColored = foam * (_FoamColor * 0.9);// 液体内部float4 result = step(i.fillEdge, 0.5) - foam;float4 resultColored = result * col;// 液体融合float4 finalResult =  foamColored + col+ lineColored;finalResult.rgb += RimResult;// color of backfaces/ topfloat4 topColor = _TopColor * (foam + result);//VFACE returns positive for front facing, negative for backfacingreturn facing > 0 ? finalResult : topColor;}ENDCG}}
}

c#：

using UnityEngine;namespace DataVisualization
{public class Wobble : MonoBehaviour{Renderer rend;Vector3 lastPos;Vector3 velocity;Vector3 lastRot;Vector3 angularVelocity;public float MaxWobble = 0.03f;public float WobbleSpeed = 1f;public float Recovery = 1f;float wobbleAmountY;float wobbleAmountZ;float wobbleAmountToAddY;float wobbleAmountToAddZ;float pulse;float time = 0.5f;// Use this for initializationvoid Start(){rend = GetComponent<Renderer>();}private void Update(){time += Time.deltaTime;// decrease wobble over timewobbleAmountToAddY = Mathf.Lerp(wobbleAmountToAddY, 0, Time.deltaTime * (Recovery));wobbleAmountToAddZ = Mathf.Lerp(wobbleAmountToAddZ, 0, Time.deltaTime * (Recovery));// make a sine wave of the decreasing wobblepulse = 2 * Mathf.PI * WobbleSpeed;wobbleAmountY = wobbleAmountToAddY * Mathf.Sin(pulse * time);wobbleAmountZ = wobbleAmountToAddZ * Mathf.Sin(pulse * time) * 0.1f;// send it to the shaderrend.material.SetFloat("_WobbleX", wobbleAmountY);rend.material.SetFloat("_WobbleZ", wobbleAmountZ);// velocityangularVelocity = transform.rotation.eulerAngles - lastRot;if (Input.GetMouseButton(1)){// add clamped velocity to wobblewobbleAmountToAddY += Mathf.Clamp((Input.GetAxis("Mouse X") + (angularVelocity.z * 0.2f)) * MaxWobble, -MaxWobble, MaxWobble);wobbleAmountToAddZ += Mathf.Clamp((Input.GetAxis("Mouse Y") + (angularVelocity.x * 0.2f)) * MaxWobble, -MaxWobble, MaxWobble);}// keep last positionlastRot = transform.rotation.eulerAngles;}}
}