Source/Architecture/ID/Main
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Main Data-Base
The Main structure is the runtime equivalent of a .blend file: it stores all IDs representing the whole data of the current file.
It also stores runtime-only data, like the full version of all linked IDs, and some short-life helping information like relationships between data-blocks.
It is defined, along with its core API, in BKE_main.h
.
ID storage in Main
One list by id type, ordered by name, with linked IDs after local ones.