![]() To choose an item in a sub menu simply click on the small circle next to that item and it will become selected, like Mercury is in the screenshot above. Some add-ons may have additional options, such as the Solar System add-on, to find these open the 'Layer Manager' and click the triangle next to the add-on's name, a sub menu will appear like this one: You can then safely click the cross at the top right of the 'Layer Manager' to close it. The 'Layer Manager' shows a list of all add-ons installed plus any imagery data sets included by NASA, find the add-on you are looking for in the list and click in the square box next to its name, it will become ticked, this means the add-on is activated: Other add-ons need activating from the ' Layer Manager', to open the 'Layer Manager' click the icon in World Winds toolbar: Once installed run World Wind and the add-on will automatically be loaded, some add-ons will add an icon to your World Wind toolbar, which when clicked on activates that add-on, for example the Darwin add-on has an icon which looks like this: Note - make sure World Wind is closed before installing new add-ons. Most of the add-ons listed on this page come as a self installing executable file, simply download them, doubleclick them and follow any on-screen instructions as you would any other application you download off the internet. ![]() Once the plug-in is installed there are a few more steps needed to make World Wind use it, first load World Wind, then open the Plug-Ins menu and click Load/Unload. Some plug-ins will come with a self installing exe, others as a compressed file such as a zip, the self installing ones should be fairly simple to install just double click the downloaded file and follow the prompts, compressed files should be extracted to the Plugins directory usually found in 'Program Files\NASA\World Wind 1.3'. So what are they? Well they are pieces of code written in C#, VB or J# which are loaded and compiled by World Wind at startup, basically allowing plug-in developers to add features to World Wind without changing the program's source code. Plug-ins are different to add-ons, although they can be considered to be a type of add-on, they can be far more powerful and therefore are not quite so simple to install, you should only install a plug-in if you completely trust the source. This page will introduce you to a few of the many add-ons available and give you basic instructions on how to use them. Introduction What are add-ons and why do I need them?Īdd-ons are basically new features for World Wind which are not produced by NASA, why do you need them? Well the simple answer is they are cool, you can use them to view other planets, see the routes taken by famous explorers, zoom into areas not covered by NASA data, and much more. 1.1 What are add-ons and why do I need them?.The site includes a number of useful resources and demonstrations for the Web World Wind Javascript API. The site includes a number of useful resources and demonstrations. This site includes the full source plus daily builds and the API documentation. ![]() The NASA World Wind SDK can be freely downloaded from the WorldWind site. ![]()
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