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
