GL.IssuePluginEvent 发布插件事件

Description 描述

Send a user-defined event to a native code plugin.

发送一个用户定义的事件到一个本地代码插件。

Rendering in Unity can be multithreaded if the platform and number of available CPUs will allow for it. When multithreaded rendering is used, the rendering APIcommands happen on a thread which is completely separate from the one that runs the scripts. Consequently, it is not possible for your plugin to start rendering immediately, since it might interfere with what the render thread is doing at the time.

如果该平台可用的GPU允许Unity可以多线程渲染。当使用多线程时，渲染API命令一个线程从其中一个运行的脚本上完全独立。所以，你的插件可能不会立即渲染，因此它可能会影响什么渲染线程正在做的时间。 In order to do any rendering from the plugin, you should call GL.IssuePluginEvent from your script, which will cause your native plugin to be called from the render thread. For example, if you call GL.IssuePluginEvent from the camera's OnPostRender function, you'll get a plugin callback immediately after the camera has finished rendering.

为了从插件做任何渲染，应该从脚本调用GL.IssuePluginEvent，这将使您的本地插件可以被渲染线程调用。如果你从相机的OnPostRender函数调用GL.IssuePluginEvent，你将会在相机渲染完成后立即得到一个插件回调。

C#

protected IEnumerator CallPluginAtEndOfFrames()
{
    while (true)
    {
        // Wait until all frame rendering is done
        yield return new WaitForEndOfFrame();
#if UNITY_STANDALONE_WIN || UNITY_STANDALONE_OSX || UNITY_EDITOR
        GL.IssuePluginEvent();
#elif UNITY_IPHONE || UNITY_ANDROID
        UnityRenderEvent();
#endif
    }
}

Example 例子

An example of a low-level rendering plugin can be downloaded here. This simply draws a rotating triangle from C++ code after all regular rendering is done. The project works with Windows (Visual Studio 2008) and Mac OS X (Xcode 3.2) and uses Direct3D 9 on Windows and OpenGL on both platforms.The Direct3D 9 project also demonstrates how to handle "lost" devices.

在这里下载一个底层渲染的插件的例子。这只是一个在所有规则的渲染完成之后利用C++代码画出一个旋转的三角形的简单例子。该项目可以工作与Windows（Visual Sutdio 2008）和Mac OS X（Xcode 3.2），在Windows中使用了Direct3D 9，同时两个平台使用了OpenGL。使用Direct3D 9的项目同时还演示了如果处理设备丢失。

摘抄自

　　底层本地插件接口 Low-level Native Plugin Interface

　　GL.IssuePluginEvent 发布插件事件