However, a time limit can be easily cheated by the user: They simply set back their computer’s system clock and date. As long as you stick to the “refuse to work” idea, it is also very simple to implement. This is a very easy way of limiting a demo version. After that, the program will either refuse to work or have some limitations, like e.g. Usually – there might be exceptions – a demo version of a plugin comes in one of the following flavors: Time limitedĭemo version works (fully functional) for a certain amount of time. The plugin is simply in “demo mode” until a valid license is found. It gives users the chance to play around with it and get to love it (hence, creating the unresistable urge to buy the full version).Ī “demo version” might very well be the same binary as the version for the customers. Putting out a demo version of your plugin is always a good idea. You should have your license system thought-through, also sales-wise, before you actually implement it. the network adapter’s MAC address? Are you planning on a demo version of your plugin? How will that demo version look like, how is the protection going to be? How restrictive will your license policy be? Which information should be used for license key generation? Are you only going to limit usage of a plugin license to the user’s CINEMA 4D serial, or are you going to use more information, like e.g. Here are some thoughts about that… So many questions The “Licensing Plugins” articles will concentrate mainly on the technical implementation of a license system, however one should also pay close attention to how licensing is presented to the user and how it should work. Part III – Implementing the license validation.This is a series of five articles: Contents of the series The author of this article is not be held responsible for any damage that might occur due to an implementation based on this article. It is neither guaranteed to be free of errors, nor to be complete. Important note: This article just presents some common approaches and solutions for licensing CINEMA 4D plugins. This first article explains how licensing basically works, discusses aspects of different license systems, and points out some things about crackers.

At one point or another during the work on your plugin you will have to spend some thought a proper license system. Writing a plugin that extends the functionality of CINEMA 4D is often only the first step towards a finished product.

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