调用Native Plugin

使用C/C++生成的库，调用方法如下

// Native Plugin 中声明的函数
float FooPluginFunction () { return 5.0F; } 

调用插件

using UnityEngine;
using UnityEngine;
using System.Runtime.InteropServices;

class SomeScript : MonoBehaviour {

   #if UNITY_IPHONE

   // On iOS plugins are statically linked into
   // the executable, so we have to use __Internal as the
   // library name.
   [DllImport ("__Internal")]

   #else

   // Other platforms load plugins dynamically, so pass the name
   // of the plugin's dynamic library.
   [DllImport ("PluginName")]

   #endif

   private static extern float FooPluginFunction ();

   void Awake () {
      // Calls the FooPluginFunction inside the plugin
      // And prints 5 to the console
      print (FooPluginFunction ());
   }
}

https://docs.unity3d.com/560/Documentation/Manual/NativePlugins.html