3d73b71a97
This adds support for running a set of nodes repeatedly. The number of iterations can be controlled dynamically as an input of the repeat zone. The repeat zone can be added in via the search or from the Add > Utilities menu. The main use case is to replace long repetitive node chains with a more flexible alternative. Technically, repeat zones can also be used for many other use cases. However, due to their serial nature, performance is very sub-optimal when they are used to solve problems that could be processed in parallel. Better solutions for such use cases will be worked on separately. Repeat zones are similar to simulation zones. The major difference is that they have no concept of time and are always evaluated entirely in the current frame, while in simulations only a single iteration is evaluated per frame. Stopping the repetition early using a dynamic condition is not yet supported. "Break" functionality can be implemented manually using Switch nodes in the loop for now. It's likely that this functionality will be built into the repeat zone in the future. For now, things are kept more simple. Remaining Todos after this first version: * Improve socket inspection and viewer node support. Currently, only the first iteration is taken into account for socket inspection and the viewer. * Make loop evaluation more lazy. Currently, the evaluation is eager, meaning that it evaluates some nodes even though their output may not be required. Pull Request: https://projects.blender.org/blender/blender/pulls/109164 |
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