目錄結構

• 專案簡述
• 策劃文案
• 美術資源
• 程式邏輯
• 效能優化

---

專案簡述

1. 專案方向
2. 時間計劃
3. 人員配置
4. 具體內容執行 GO!

---

策劃文案（略過） “兵馬未動，糧草先行~”，優秀的策劃文件是專案良好的開端

---

美術資源

• Standard
• Model
• Shader
• Texture
• Lighting
• Animator/Controller
• Audioclip

                              Standard

Material使用

Model三角面

Texture尺寸

Particle限制

Animation幀頻

               Model

• Enabled執行時更改（makes a copy in memory）,Disable 節省記憶體

• Optimize Mesh 必須選擇

• Normals & Tangents 設定為非Import選項可以降低memory以及減少ipa/apk包體大小

                      Shader

• Check對應的Vertex/fragment
• Compile 彙編程式碼/GLSL程式碼
• Shader效能分析工具 - AMD GPU ShaderAnalyzer/PVRShaderEditor
• Shader compile when need
• Comiled Shader快取

                             Texture

• PSD，TIFF，JPG，TGA，PNG，GIF,BMP,IFF,PICT
• Scence/Mipmaps check紋理精度
• Enabled Runtime 可更改(Make a copy in memory),Disable save memory
• PVRTC格式Texture需要為正方形
• Mipmap空間換時間

                                   Light

• Mobile device推薦使用Baked or Mixed
• Rendeer Mode 儘量少用Important
• Window->Lighting
• Scale in light map
• Preserve UVs

                   Animator/Controller

• Apply Root Motion 動畫驅動位置
• State 切換 & Bleed Tree
• Window -> Animator

AudioClip

• 常用格式aif,wav,mp3,ogg
• Verbis-encoded(ogg)解壓變大10倍
• PCM高質量單低壓縮率
• ADPCM效能結餘PCM與Mp3之間
• Mp3格式在IOS裝置你有硬體解碼器

---

程式邏輯

• Logic架構
• Script應用
• Assert管理
• Dynamic update

Logic架構

• Modular Design
• "Plug and Play"
• independence and encapsulation(封裝)

Script應用

• Edit->Project Setting ->Script Execution
• MonoBehavior 執行機制
• C++到託管C#存在呼叫開銷
• Script Call Optimization 可忽略 Exception
• Script serialization (ScriptableObject)

Asset管理

• Asset Serialization (Text,Binary,Mixed)
• .meta file
• UI atlas arrange
• Prefab(模型檔案都變成prefab)
• Asset bundle

Dynamic Update

• Script updata(使用C#前提下Android使用dll反射，其他平臺暫不支援)
• 美術Assets(使用Asset bundle)
• 配置資料

---

效能優化

• Graphics
• Physics
• Scripts
• File size
• Tools

Graphics

• Bottlenecks on CPU or GPU
• GPU limitaiton  (verticle not more than 10w on mobile,several millions on PC)
• Vertex processiong on GPU.(skinned meshes,cloth simulation,particles etc.)

CPU optimization

• Combine objects(manually or batching)
• Use less materials
• Putting separate textures into a larger
• Use less muliple render(reflections,shadows,perpixel lights etc)

GPU optimaization

• Model Geometry
• • Don't use any more triangles than necessary
  • Static batching non-moving objects
  • Try to keep the numbers of UV mapping seams and hard edges(doubled-up vertices) as low as possible
• Lighting Performance
• • LightMap replace real time lighting
  • Shader instad of lighting
  • Use the least pixel lighting saves both CPU and the GPU
• High-performance shaders
• • Alpha Blend replace Alpha Test
  • Complex mathematical operations pow,exp,log,cos,sin,tan
  • Floating point operations Cg/HLSL(float ,half,fixed) GLSL ES(highp,mediump,lowp)
• Texture Compression and Mipmaps
• • Compression save memory and bandwidth
  • Always Mipmaps for textures used in a 3D scene
• LOD and Pre-Layer Cull
• • LOD forlarge object
  • Camera,layCullDistances for small object

 Physics

• Fixed Timestep
• Mesh colliders and wheel colliders
• Rigidbody
• Physics.RaycastAll in scripts  存在記憶體中

Scripts

• Optimized by Design
• Use IL2CPP
• Script Call Optimization
• Aviod allcating memory frequently
• Profiler is King

File Size

• Identify the assets size by Consonle->Open Editor Log
• Replach assets in Resources with AssetBundles
• Use .NET Subset if you can
• IOS  Stripping
• Specific operaiton

Tools

• Unity Profiler
• Memory Profiler   https://bitbucknet.org/Unity-Technologies/
• MAC OS -> Instruments Allocations,Time Profiler

Search 打法：在Manual 輸入 Optimiziing  優化的所有項都出現了