Interesting examples

[bsavery]

Came across this from the blender-contribs list. Here's an example of something I've been looking at, if you could point me to the code here where I should start looking, that would be appreciated!

So imagine you have some network rendering solution, you hit render in blender, and it starts the rendering remotely or even in a separate process. As tiles/buckets of the render are done it would receive those over the network (asynchronously), and write to the renderresult. If you take a look at the RenderEngine plugin example this might make more sense : https://docs.blender.org/api/blender_python_api_current/bpy.types.RenderEngine.html

It seems like the correct thing would be to start the server which would receive rendered tiles in the render_scene method in the linked example. So I did that, just wasn't sure if there was some way we should be grabbing the correct event loop, it also seems like the blender ui freezes when end_result() is called.

Thoughts? Thanks for the example!

[akloster]

I think the idea is to spread out the begin_result/end_result across the task, so you would call begin_result with every chunk received, wait for the next chunk on the network, etc. Until all rectangles are finished and you call end_result.

I wouldn't know why end_result() freezes the UI. I Can't check this without further code and explanation.

[bsavery]

Well I'm assuming because blender draws the pixels to screen at the end_result

On Mon, Mar 27, 2017 at 11:14 PM Andreas Klostermann < notifications@github.com> wrote:

I think the idea is to spread out the begin_result/end_result across the task, so you would call begin_result with every chunk received, wait for the next chunk on the network, etc. Until all rectangles are finished and you call end_result.

I wouldn't know why end_result() freezes the UI. I Can't check this without further code and explanation.

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[hedgehog-labs]

Hey is this project dead? i just found it and really like the results....is there a way you can point me in the right direction to hear from a tcp server instead of a web server??? inside of blender... i tried to implement asyncio by myself...but the ui always freeze and crashes blender

[akloster]

hm, I think the code in the repository should work. It's not meant to be a full fledged extension/API/plugin yet, but rather a set of ideas and proof-of-concepts. But the loop implementation works. Unfortunately there is only very little interest from the Blender community in general. There is a plugin for blender-cloud which uses a similar asyncio hack, but in general, they don't seem to the benefits of asyncio in Blender in the first place. Additionally, I don't have the time or energy to pursue this further at this point.

In terms of TCP servers try this example from asyncio: http://asyncio.readthedocs.io/en/latest/tcp_echo.html