文章目录

环境
SoftParticleCommon.cg
Alpha blend
Additive blend
UniformSetSoftParticleThreshold.cs
CustomGraphicsSettings.cs
- 查看 SetGlobalKW
SoftParticleToggle.cs
遇到的坑 _InvFade 默认值修改未 10.0 来避坑

Talk is Cheap, Show me your CODE!

环境

Unity : 2018.2.11f1
Pipeline : BRP

SoftParticleCommon.cg

#ifndef __SOFT_PARTICLE_COMMON_H__
#define __SOFT_PARTICLE_COMMON_H__// jave.lin 2021/02/28#include "UnityCG.cginc"#if defined(_SOFT_PARTICLE_ON)#if defined(_SOFT_PARTICLE_DEPTH_MAP_DEF_ON)
sampler2D _CameraDepthTexture;
#endif// https://github.com/TwoTailsGames/Unity-Built-in-Shaders/blob/master/DefaultResourcesExtra/Particle%20AddMultiply.shader
half _InvFade; // _InvFade ("Soft Particles Factor", Range(0.01,3.0)) = 1.0#define SOFT_PARTICLE_V2F(idx) float4 projPos : TEXCOORD##idx;#define SOFT_PARTICLE_VERT(o) \
o.projPos = ComputeScreenPos(o.vertex); \
COMPUTE_EYEDEPTH(o.projPos.z);#define COMPUTE_EYEDEPTH1(o, objVertex) o = -UnityObjectToViewPos( objVertex ).z#define SOFT_PARTICLE_VERT1(o, vertex) \
o.projPos = ComputeScreenPos(vertex); \
COMPUTE_EYEDEPTH(o.projPos.z);#define SOFT_PARTICLE_VERT2(o, vertex, objVertex) \
o.projPos = ComputeScreenPos(vertex); \
COMPUTE_EYEDEPTH1(o.projPos.z, objVertex);#define SOFT_PARTICLE_FRAG_FADE(i, out_v) \
fixed offSP = step(10.0, _InvFade); \
out_v = saturate(_InvFade * (LinearEyeDepth (SAMPLE_DEPTH_TEXTURE_PROJ(_CameraDepthTexture, UNITY_PROJ_COORD(i.projPos))) - i.projPos.z)); \
out_v = lerp(out_v, 1.0, offSP);#else#define SOFT_PARTICLE_V2F(idx)
#define SOFT_PARTICLE_VERT(o)
#define SOFT_PARTICLE_VERT1(o, vertex)
#define SOFT_PARTICLE_FRAG_FADE(i, out_v)  out_v = 1.0;#endif#endif

意思有两句 fixed offSP = step(10.0, _InvFade); 和 out_v = lerp(out_v, 1.0, offSP); 是为了避免由些特效同学再制作 UI 特效的时候没效果 UI 特效的 BUG

这里我就不使用变体了，计算量不算大，直接 step, lerp 来伪分支即可

Alpha blend

soft particle fade 主要用于 alpha 通道即可

Shader "cgwell/Alpha Blended"
{Properties {_TintColor ("Tint Color", Color) = (0.5,0.5,0.5,0.5)_MainTex ("Particle Texture", 2D) = "white" {}[HideInInspector]_Center ("Center",Vector) = (0,0,0,1)[HideInInspector]_Scale ("Scale",Vector) = (1,1,1,1)[HideInInspector]_Normal ("Normal",Vector) = (0,0,1,0)_InvFade("Soft Particles Factor", Range(0.01,10.0)) = 10.0 //1.0}Category {Tags { "Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent" }Blend SrcAlpha OneMinusSrcAlphaCull Off Lighting Off ZWrite Off Fog { Mode Off}SubShader {Pass {CGPROGRAM#pragma vertex vert#pragma fragment frag#pragma fragmentoption ARB_precision_hint_fastest#pragma multi_compile _ _SOFT_PARTICLE_ON//#define _SOFT_PARTICLE_ON#define _SOFT_PARTICLE_DEPTH_MAP_DEF_ON#include "UnityCG.cginc"#include "../../../Shaders/Includes/CG/SoftParticleCommon.cginc"sampler2D _MainTex;fixed4 _TintColor;struct appdata_t {float4 vertex : POSITION;fixed4 color : COLOR;float2 texcoord : TEXCOORD0;};struct v2f {float4 vertex : SV_POSITION;fixed4 color : COLOR;float2 texcoord : TEXCOORD0;SOFT_PARTICLE_V2F(1)};float4 _MainTex_ST;float4 _Center;float4 _Scale;float4 _Normal;uniform float4x4 _Camera2World;v2f vert (appdata_t v){v2f o;o.vertex = UnityObjectToClipPos(v.vertex);o.color = v.color;o.texcoord = TRANSFORM_TEX(v.texcoord,_MainTex);SOFT_PARTICLE_VERT(o)return o;}fixed4 frag (v2f i) : SV_Target{float fade;SOFT_PARTICLE_FRAG_FADE(i, fade)fixed4 col = saturate(2.0f * i.color * _TintColor * tex2D(_MainTex, i.texcoord));col.a *= fade;return col;}ENDCG }}}
}

Additive blend

主要是减少亮度，也就是 RGB 整体降低

Shader "cgwell/Dissolution_Add" {Properties {_TintColor ("Diffuse Color", Color) = (0.6985294,0.6985294,0.6985294,1)_MainTex ("Diffuse Texture", 2D) = "white" {}_N_mask ("N_mask", Float ) = 0.3_MaskTexture ("Mask Texture", 2D) = "white" {}_C_BYcolor ("C_BYcolor", Color) = (1,0,0,1)_N_BY_QD ("N_BY_QD", Float ) = 3_N_BY_KD ("N_BY_KD", Float ) = 0.01[HideInInspector]_Cutoff ("Alpha cutoff", Range(0,1)) = 0.5_InvFade("Soft Particles Factor", Range(0.01,3.0)) = 10.0 //1.0}SubShader {Tags {"IgnoreProjector"="True""Queue"="Transparent""RenderType"="Transparent"}Pass {Name "FORWARD"Tags {"LightMode"="ForwardBase"}Blend One OneZWrite OffCull OffCGPROGRAM#pragma vertex vert#pragma fragment frag//#define UNITY_PASS_FORWARDBASE#include "UnityCG.cginc"#include "../../../Shaders/Includes/CG/SoftParticleCommon.cginc"#pragma multi_compile _ _SOFT_PARTICLE_ON//#define _SOFT_PARTICLE_ON#define _SOFT_PARTICLE_DEPTH_MAP_DEF_ON#pragma target 3.0uniform sampler2D _MaskTexture; uniform float4 _MaskTexture_ST;uniform sampler2D _MainTex; uniform float4 _MainTex_ST;uniform float4 _TintColor;uniform float _N_mask;uniform float _N_BY_KD;uniform float4 _C_BYcolor;uniform float _N_BY_QD;struct VertexInput {float4 vertex : POSITION;float2 texcoord0 : TEXCOORD0;float4 vertexColor : COLOR;};struct VertexOutput {float4 pos : SV_POSITION;float2 uv0 : TEXCOORD0;float4 vertexColor : COLOR;SOFT_PARTICLE_V2F(1)};VertexOutput vert (VertexInput v) {VertexOutput o = (VertexOutput)0;o.uv0 = v.texcoord0;o.vertexColor = v.vertexColor;o.pos = UnityObjectToClipPos(v.vertex );SOFT_PARTICLE_VERT1(o, o.pos)return o;}float4 frag(VertexOutput i) : COLOR {float4 _MainTex_var = tex2D(_MainTex,TRANSFORM_TEX(i.uv0, _MainTex));float vertColMulMask = (i.vertexColor.a * _N_mask);float maskTexture_r = tex2D(_MaskTexture,TRANSFORM_TEX(i.uv0, _MaskTexture)).r;float isMaskRGreaterThanVertColMulMask = step(vertColMulMask,maskTexture_r);float isMaskRNotGreaterThanVertColMulMask = step(maskTexture_r,vertColMulMask);float vertColMulMaskIsGreaterThan_MaskRPlus_N_BY_KD = step((maskTexture_r+_N_BY_KD),vertColMulMask);float node_1274 = (isMaskRNotGreaterThanVertColMulMask-vertColMulMaskIsGreaterThan_MaskRPlus_N_BY_KD);float node_6450 = (isMaskRNotGreaterThanVertColMulMask+node_1274);float3 node_7666 = ((node_1274*_C_BYcolor.rgb)*_N_BY_QD);float3 emissive = (_TintColor.a*(((_TintColor.rgb*_MainTex_var.rgb)*node_6450)+node_7666));float3 finalColor = emissive + (_TintColor.a*node_7666);float node_6644 = (_TintColor.a*(_MainTex_var.a*node_6450));fixed4 col = saturate(fixed4(finalColor,node_6644));float fade;SOFT_PARTICLE_FRAG_FADE(i, fade)col *= fade;return col;}ENDCG}}
}

因为这些特效之前使用了比较多特效材质的 shader 都是每有这个 _InvFade("Soft Particles Factor", Range(0.01,3.0)) = 0.1 //1.0 属性的，并且优化之前我忘记将默认值线调整到一个看着比较好统一值

然后 _InvFade 都默认是 1.0 了，效果不是很好，如果需要对几千个特效的材质统一处理默认值未 0.1，那么这么多个材质，手动去调整肯定要死人，所以就写个工具批量处理一下即可

UniformSetSoftParticleThreshold.cs

// jave.lin : 2022/03/01using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using UnityEditor;
using UnityEngine;public class UniformSetSoftParticleThreshold : EditorWindow
{private static int _InvFade = Shader.PropertyToID("_InvFade");[MenuItem("Tools/统一调整所有SoftParticleThreshold...")]public static void _Show(){var win = EditorWindow.GetWindow<UniformSetSoftParticleThreshold>();win.Show();}private float uniformValue = 0.1f;private bool adjusting = false;private int doingIDX = -1;private int len = -1;private bool error = false;private int handlePerFrame = 5;private List<string> assetPaths;private Stopwatch sw;private void OnEnable(){if (assetPaths == null){assetPaths = new List<string>();}}private void OnGUI(){uniformValue = EditorGUILayout.FloatField("Uniform SoftParticle Threshold", uniformValue);const int min = 1, max = 20;handlePerFrame = EditorGUILayout.IntSlider("Hanlde Per Frame", handlePerFrame, min, max);var srcEnabled = GUI.enabled;if (adjusting){GUI.enabled = false;}if (GUILayout.Button("Adjust")){var filterPaths = new string[]{"Assets/LuaFramework/Effect","Assets/LuaFramework/EffectNew"};if (assetPaths == null) assetPaths = new List<string>();else assetPaths.Clear();foreach (var filterPath in filterPaths){var guids = AssetDatabase.FindAssets("t:Material", new string[] { filterPath });foreach (var guid in guids){var assetPath = AssetDatabase.GUIDToAssetPath(guid);assetPaths.Add(assetPath);}}doingIDX = 0;len = assetPaths.Count;adjusting = true;sw = new Stopwatch();sw.Start();UnityEngine.Debug.Log("Uniform SoftParticle Threshold Start!");}GUI.enabled = srcEnabled;}private void Update(){if (adjusting && assetPaths != null && assetPaths.Count > 0){if (doingIDX == -1 && len == -1){adjusting = false;return;}if (doingIDX >= len){AssetDatabase.SaveAssets();AssetDatabase.Refresh();adjusting = false;sw.Stop();UnityEngine.Debug.Log(string.Format("Uniform SoftParticle Threshold Complete! handle:{0}, len:{1}, et:{2}",doingIDX, len, sw.Elapsed));return;}var cancel = EditorUtility.DisplayCancelableProgressBar("Uniform SoftParticle Threshold",string.Format("{0}/{1}", (doingIDX + 1), len),(float)(doingIDX + 1) / len);if (cancel){adjusting = false;sw.Stop();UnityEngine.Debug.Log(string.Format("Uniform SoftParticle Threshold Cancel! handle:{0}, len:{1}, et:{2}",doingIDX, len, sw.Elapsed));return;}var n = handlePerFrame;while (n-- > 0){if (doingIDX >= len)return;var assetPath = assetPaths[doingIDX++];try{var mat = AssetDatabase.LoadAssetAtPath<Material>(assetPath);if (mat.HasProperty(_InvFade)){mat.SetFloat(_InvFade, uniformValue);}}catch (System.Exception er){error = true;adjusting = false;sw.Stop();UnityEngine.Debug.Log(string.Format("Uniform SoftParticle Threshold error, idx : {0}, len : {1}\nassetPath : {2}\nerror : \n{3}",doingIDX, len, assetPath, er));}}}}
}

CustomGraphicsSettings.cs

using System;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Rendering;
using UnityEngine.SceneManagement;// jave.lin : 画质级别
public enum QualityLevel
{Low = 1,Middle = 2,High = 3,Ultra = 4,
}public class CustomGraphicsSettings
{public static void InitGraphicSetting(){SceneManager.activeSceneChanged -= Instance.OnActiveSceneChanged;SceneManager.activeSceneChanged += Instance.OnActiveSceneChanged;// 场景变更的回调，先调 activeSceneChanged， 再调 sceneLoaded； 比较反直觉。// SceneManager.sceneLoaded -= Instance.OnSceneLoaded;// SceneManager.sceneLoaded += Instance.OnSceneLoaded;SceneManager.sceneUnloaded -= Instance.OnSceneUnloaded;SceneManager.sceneUnloaded += Instance.OnSceneUnloaded;Instance.srcShadows = QualitySettings.shadows;Instance.srcAntiAliasing = QualitySettings.antiAliasing;var powerSaveMode = PlayerPrefs.GetInt(kPowerSaveModeKey, 0) == 1;PowerSaveMode = powerSaveMode;var graphicsQualityLevel = Instance.GetGraphicsQualityLevel();GraphicsQualityLevel = graphicsQualityLevel;Instance.DeviceAdapterQualityLevel = GraphicsQualityLevel;}public static bool PowerSaveMode{get{return Application.targetFrameRate < 40;}set{var cv = PlayerPrefs.GetInt(kPowerSaveModeKey, -1);var nv = value ? 1 : 0;if (cv != nv){PlayerPrefs.SetInt(kPowerSaveModeKey, nv);}var fps = value ? 30 : 60;Application.targetFrameRate = fps;}}public static QualityLevel GraphicsQualityLevel{get {return Instance.GetGraphicsQualityLevel();}set{if ((int)value != PlayerPrefs.GetInt(kGraphicsQualityLevelKey, -1)){PlayerPrefs.SetInt(kGraphicsQualityLevelKey, (int)value);Instance.SetGraphicsQualityLevel(value);if (null != onGraphicsQualityLevelChanged){onGraphicsQualityLevelChanged.Invoke(value);}}}}private static CustomGraphicsSettings Instance{get{if (null == instance){instance = new CustomGraphicsSettings();}return instance;}}public static Action<QualityLevel> onGraphicsQualityLevelChanged;private static CustomGraphicsSettings instance = null;public QualityLevel DeviceAdapterQualityLevel{get; private set;}public Dictionary<string, CustomLightMapData[]> LightMapRecord{get{return lightMapRecord;}set{lightMapRecord = value;}}private int srcAntiAliasing;private ShadowQuality srcShadows;private const string kPowerSaveModeKey = "graphics.setting.power.save.mode";private const string kGraphicsQualityLevelKey = "graphics.setting.quality.level";private QualityLevel AnalysicDeviceLevel(){if (SystemInfo.processorFrequency >= 2500 &&SystemInfo.processorCount >= 8 &&SystemInfo.systemMemorySize >= (6 * 1024) &&SystemInfo.graphicsMemorySize >= (2 * 1024) &&SystemInfo.graphicsShaderLevel >= 30 &&SystemInfo.graphicsMultiThreaded &&SystemInfo.supportsShadows &&SystemInfo.supportsInstancing &&SystemInfo.supports32bitsIndexBuffer){return QualityLevel.Ultra;}else if (SystemInfo.processorFrequency >= 2000 &&SystemInfo.processorCount >= 4 &&SystemInfo.systemMemorySize >= (4 * 1024) &&SystemInfo.graphicsMemorySize >= (1 * 1024) &&SystemInfo.graphicsShaderLevel >= 20){return QualityLevel.High;}else if (SystemInfo.processorFrequency >= 1500 &&SystemInfo.processorCount >= 2 &&SystemInfo.systemMemorySize >= (2 * 1024) &&SystemInfo.graphicsMemorySize >= (512) &&SystemInfo.graphicsShaderLevel >= 10){return QualityLevel.Middle;}else{return QualityLevel.Low;}}private QualityLevel GetGraphicsQualityLevel(){var val = PlayerPrefs.GetInt(kGraphicsQualityLevelKey, -1);if (val == -1){return AnalysicDeviceLevel();}else{return (QualityLevel)val;}}/// <summary>/// 设置图像等级/// </summary>/// <param name="level">[1， 4]，等级越高，图形效果越好</param>private void SetGraphicsQualityLevel(QualityLevel level){SetGraphicsTier(level);SetResolutionAndShaderLOD(level);SetAntiAliasing(level);SetLigthMapUsage(level);SetShadow(level);SetGlobalKW(level);}private void SetLigthMapUsage(QualityLevel level){if (level >= QualityLevel.High){var datas = CreateCurLightMapsData(SceneManager.GetActiveScene().name);var len = datas != null ? datas.Length : 0;var newLightMapDatas = new LightmapData[len];for (int i = 0; i < len; i++){newLightMapDatas[i] = datas[i].CreateLightMapData();}LightmapSettings.lightmaps = newLightMapDatas;}else{LightmapSettings.lightmaps = new LightmapData[] { };}}private void SetAntiAliasing(QualityLevel level){if (level >= QualityLevel.High){QualitySettings.antiAliasing = srcAntiAliasing;}else{QualitySettings.antiAliasing = 0;}}private void SetGraphicsTier(QualityLevel level){switch(level){case QualityLevel.Low:case QualityLevel.Middle:Graphics.activeTier = GraphicsTier.Tier1;break;case QualityLevel.High:Graphics.activeTier = GraphicsTier.Tier2;break;case QualityLevel.Ultra:Graphics.activeTier = GraphicsTier.Tier3;break;}}private void SetResolutionAndShaderLOD(QualityLevel level){switch (level){case QualityLevel.Low:QualitySettings.resolutionScalingFixedDPIFactor = 0.75f;Shader.globalMaximumLOD = 200;QualitySettings.masterTextureLimit = DeviceAdapterQualityLevel < QualityLevel.High ? 3 : 2;break;case QualityLevel.Middle:QualitySettings.resolutionScalingFixedDPIFactor = 0.85f;Shader.globalMaximumLOD = 400;QualitySettings.masterTextureLimit = DeviceAdapterQualityLevel < QualityLevel.High ? 2 : 1;break;case QualityLevel.High:QualitySettings.resolutionScalingFixedDPIFactor = 0.85f;Shader.globalMaximumLOD = 600;QualitySettings.masterTextureLimit = 0;break;case QualityLevel.Ultra:QualitySettings.resolutionScalingFixedDPIFactor = 1.00f;Shader.globalMaximumLOD = 800;QualitySettings.masterTextureLimit = 0;break;}}private void SetShadow(QualityLevel level){switch (level){case QualityLevel.Low:QualitySettings.shadows = ShadowQuality.Disable;break;case QualityLevel.Middle:QualitySettings.shadows = ShadowQuality.Disable;break;case QualityLevel.High:QualitySettings.shadows = srcShadows;QualitySettings.shadowResolution = ShadowResolution.Low;QualitySettings.shadowDistance = 70;break;case QualityLevel.Ultra:QualitySettings.shadows = srcShadows;QualitySettings.shadowResolution = ShadowResolution.High;QualitySettings.shadowDistance = 100;break;}}private void SetGlobalKW(QualityLevel level){switch (level){case QualityLevel.Low:case QualityLevel.Middle:Shader.DisableKeyword("_SOFT_PARTICLE_ON");break;case QualityLevel.High:case QualityLevel.Ultra:Shader.EnableKeyword("_SOFT_PARTICLE_ON");break;}}private Dictionary<string, CustomLightMapData[]> lightMapRecord = new Dictionary<string, CustomLightMapData[]>();private void OnActiveSceneChanged(Scene from, Scene to){CreateCurLightMapsData(to.name);var level = GetGraphicsQualityLevel();SetGraphicsQualityLevel(level);}private CustomLightMapData[] CreateCurLightMapsData(string sceneName){CustomLightMapData[] ret;var srcLightmaps = LightmapSettings.lightmaps;var srcLightmapsLen = srcLightmaps != null ? srcLightmaps.Length : 0;// create map datavar recreate = false;if (!lightMapRecord.TryGetValue(sceneName, out ret)){if (srcLightmapsLen > 0){recreate = true;}}else{recreate = ret.Length < srcLightmapsLen;}if (recreate){ret = new CustomLightMapData[srcLightmapsLen];for (int i = 0; i < srcLightmapsLen; i++){ret[i] = new CustomLightMapData();}lightMapRecord[sceneName] = ret;}// fill map dataif (ret != null){if (srcLightmapsLen > 0){for (int i = 0; i < srcLightmapsLen; i++){ret[i].CopyFrom(srcLightmaps[i]);}}}return ret;}private void OnSceneUnloaded(Scene scene){lightMapRecord.Remove(scene.name);}
}

查看 SetGlobalKW

    private void SetGlobalKW(QualityLevel level){switch (level){case QualityLevel.Low:case QualityLevel.Middle:Shader.DisableKeyword("_SOFT_PARTICLE_ON");break;case QualityLevel.High:case QualityLevel.Ultra:Shader.EnableKeyword("_SOFT_PARTICLE_ON");break;}}

SoftParticleToggle.cs

那么，特效同学在他们的特效开发场景中，看不到软粒子效果
那是因为 shader 变体每有开启，所以需要给他们一个组件来开启或关闭的功能，方便查看软粒子效果

// jave.lin : 2022/03/01using UnityEngine;[ExecuteInEditMode]
public class SoftParticleToggle : MonoBehaviour
{[Header("是否开启软粒子")]public bool softParticleEnabled = true;private bool lastSoftParticleEnabled = false;private Camera _camera;private void Start(){#if UNITY_EDITOR_camera = GetComponent<Camera>();_camera.depthTextureMode |= DepthTextureMode.Depth;#endif}private void Update(){#if UNITY_EDITORif (lastSoftParticleEnabled != softParticleEnabled){lastSoftParticleEnabled = softParticleEnabled;if (lastSoftParticleEnabled){Shader.EnableKeyword("_SOFT_PARTICLE_ON");}else{Shader.DisableKeyword("_SOFT_PARTICLE_ON");}EnabledSceneViewCamsDepth(lastSoftParticleEnabled);}#endif}private void EnabledSceneViewCamsDepth(bool enabledDepth){for (var i = 0; i < UnityEditor.SceneView.sceneViews.Count; i++){var scene = UnityEditor.SceneView.sceneViews[i] as UnityEditor.SceneView;if (scene == null) continue;EnabledCamDepth(scene.camera, enabledDepth);}}private void EnabledCamDepth(Camera camera, bool enabledDepth){if (enabledDepth)camera.depthTextureMode |= DepthTextureMode.Depth;elsecamera.depthTextureMode &= ~DepthTextureMode.Depth;Debug.Log("Camera.gameObject.name" + camera.name + ", depth : " + enabledDepth);}
}

遇到的坑 _InvFade 默认值修改未 10.0 来避坑

因为各个开启，_InvFade = 0.1 的话，会影响所有特效片段里不透明深度写入的深度图比较近

导致贴地表水的一些地裂，等特效的面片看不到效果了

所以后面又将 _InvFade 的默认值修改未 10.0 了

有了 BRP 的思路，再 URP 下实现也是很 easy 的

每天最便宜的圆珠笔一练

C 的排线已经乱套。。。 -_-~

乱画排线，排出一个锤子

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