About DLLsĪ dynamically linked library (DLL) is a set of compiled functions or procedures and their associated variables. Plugins are DLLs an understanding of DLLs is necessary to understand how plugins work. For example, there is an API to program the simulator’s Flight Management System. Other subsystems require more complex interaction and have specific APIs. For example, to set the elevation of the cloud bases, we simply set that variable in the sim. Some parts of the simulator are controlled simply by writing data to the simulator. (These APIs are discussed in more detail below.) Control various subsystems of the simulator.For example, a plugin can create popup windows with instruments or dialog boxes. For example, a plugin can change the aircraft’s position, or replace the simulator’s flight model entirely. Modify data in the simulator, changing its actions or behavior.For example, a plugin can continually read the values of the flight instruments and send them over the network. For example, a plugin can run constantly inside the simulator and log data to a file. Run code from inside the simulator, either continually (for example, once per flight cycle) or in response to events inside the simulator.
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But since plugins are not full programs, they have limitations that normal programs do not. Because plugins run “inside” the simulator, they can accomplish things that a standalone program might not be able to.
Plugins are different from conventional programs in that they are not complete programs in themselves, but rather program fragments that get added to X-Plane while it runs. Plugins allow you to extend the flight simulator’s capabilities or to gain access to the simulator’s data. Plugins are executable code that are run inside X-Plane. You may not need a plugin for what you are trying to accomplish, and a plugin may not be able to accomplish what you are trying to do.
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What a Plugin is and What Plugins Can Doīefore discussing how to write a plugin, we will describe to some extent what it can do. If you have not done modular programming using DLLs, we introduce the concepts and also provide step-by-step examples of writing a very basic plugin. If you are an experienced programmer, you may already be familiar with some of the material presented here. This article describes the basics of what a plugin is, how it works, and describes how we write one. Plugins are modular, allowing developers to extend the simulator without having to have the source code to the simulator. A plugin is executable code that runs inside X-Plane, extending what X-Plane does.
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