Unity C# 学习笔记

GeometryUtility

Unsafe | Native

• 开启Unsafe
  • Project Setting/Player
  • .asmdef
    • Unity.Burst
    • Unity.Mathematics
• 获取native指针
  • NativeArray.GetUnsafePtr()
  • NativeArray.GetUnsafeReadOnlyPtr()

    using Unity.Collections.LowLevel.Unsafe;
    
    struct SpheresSoA
    {
        [ReadOnly] public NativeArray<float> centerX;
    
        public unsafe int HitSpheres(ref Ray r, float tMin, float tMax, ref Hit outHit)
        {
            float4* ptrCenterX = (float4*) centerX.GetUnsafeReadOnlyPtr();
            float4 sCenterX = *ptrCenterX;
        }
    }

SerializedObject | ScriptObject | Reflection

• Type
  • typeof(class)
  • object.GetType()
• Asset Load
  • const string assetPath = “Assets/Settings/Universal Render Pipeline Asset.asset”;
  • var pipelineAsset = UnityEditor.AssetDatabase.LoadAssetAtPath(assetPath, typeof(RenderPipelineAsset)) as RenderPipelineAsset;
• SerializedObject
  • 支持Undo
  • 支持多个编辑
  • Property
    • FindProperty
    • SerializedProperty
      • Next
      • NextVisible
      • intValue
    • you can Shift+Right Click on property names in the Inspector to see their paths
    • Shift+右键获取属性路径
  • ApplyModifiedProperties
  • 序列化对象 SerializedObject
• ScriptableObject

Command Buffer

• Unity的CommandBuffer基础
• https://docs.unity3d.com/ScriptReference/Rendering.CommandBuffer.html
• Camera.AddCommandBuffer
• Light.AddCommandBuffer
• Graphics.ExecuteCommandBuffer
• BuiltinRenderTextureType
  • https://docs.unity3d.com/ScriptReference/Rendering.BuiltinRenderTextureType.html
  • Blit(BuiltinRenderTextureType.CurrentActive,id)
  • CurrentActive
  • Depth

Unity技巧

• 方法属性加Button
• Unity小窍门100条！！！(上)
• FormerlySerializedAs()
  • 重命名显示
• RuntimeInitializeOnLoadMethod
  • [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.AfterSceneLoad)]
    • 无需创建空物体就能执行代码
    • 在运行游戏（Play）就会立即执行该函数，而不需要继承MonoBehavior并挂接在物体身上。

Extension

// 拓展Vector3方法，关键使用this
public static Vector3 Round(this Vector3 v)
{
    xxxx
    return v;
}

Mono

• OnValidate() 属性变化时调用

UnityEvent

• 支持UI事件函数编辑
• using UnityEngine.Events;
• public UnityEvent onClick;

Custom Package

• package.json
  • name “com.xxx.core”
  • displayName “xxx”
  • version “0.0.1”
• 解决csproj生成问题，使用最新Vscode Editor Package1.2.5插件
• Asmdef
  • 模块化打包成dll

Build Player

• Compiling from command line
• https://stackoverflow.com/questions/45081576/how-can-i-compile-a-unity3d-game-project-from-command-line-into-webgl
• https://docs.unity3d.com/ScriptReference/BuildPipeline.BuildPlayer.html

  Unity.exe -quit -batchmode -projectPath "%cd%" -executeMethod "Builder.BuildAll"  -logfile "editor.log"

  public class Builder : MonoBehaviour {
  
      public static void BuildAll()
      {
          BuildPipeline.BuildPlayer(
              new[] {"Test.unity"}, 
              "Build/Win/App.exe", 
              BuildTarget.StandaloneWindows64,
              BuildOptions.None);
      }
  }

C# Native Command

• App Command Line
  • string[] args = System.Environment.GetCommandLineArgs();
  • How to start Unity application from command prompt with initial arguments?
• How to run external programs

var cmd_info = new ProcessStartInfo
{
    FileName = "notepad",   //cmd
    Arguments = "",         //args
    // Verb = "runas",      //管理员运行
    // WorkingDirectory = ".",  //cwd
};
Process process = Process.Start(cmd_info);
process.WaitForExit();
process.Close();

DLL

• Unity脚本打成DLL文件和unity使用自己生成的DLL文件
• Integrating Unity into Windows and UWP applications
• https://stackoverflow.com/questions/54335893/embed-unity3d-app-inside-wpf-without-having-it-take-up-the-whole-window