I’m testing the free version of NGUI and going through the tutorials. What I don’t understand is that the sprite atlases are not PNG format, they are prefabs (.prefab). And they also are made up of a font character atlas plus an atlas of button (and checkbox, slider, etc.) images combined. Through what process can separate atlases be combined?
Also when I look at the atlas (e.g. The SciFi Atlases) in the Inspector preview area a certain section of the atlas is bordered by a green box. What does that signify?
An atlas is a combination of several individual images. The NGui atlas gets handled by NGui. It is not recommended to edit it by hand because it also contains several other informations besides the pure image information.
You can create a NGui atlas with the NGui tools. And you can add to the atlas by simply adding single textures. I would suggest to have a look at the available tutorials. It`s a bit too much to explain it here.
Thanks. I was following the written tutorials and just now I see that there is a video tutorial that deals with it. I know what an atlas is but I was confused because I expect an atlas to also have a companion JSON or XML text file that contains the names, positions, and sizes of all the sprites (images) in the atlas. And I don’t see such a thing (except for the fonts). Anyway I’ll watch those videos.