Draw Circle with changing radius efficiently | Bevy | Page 1

bleak cloud Jun 15, 2023, 8:27 PM

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The bevy examples show circles filled in. I don't see an example for how to draw with Stroke.
I tried bevy lyons example and there the shape component doesn't inherit from default components so I can't query on the shape builder to change the radius.

I tried removing and spawning a new lyon shape bundle (with new radius) frequently, this led to performance issues & feels wrong to me - I feel like there should be an idiomatic way of querying a radius and adjusting the radius of a circle.

Maybe I need to use a specific mesh or texture?

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🤔 I could use an image and do its transform scaling but that seems un-idiomatic

spark vault Jun 15, 2023, 8:42 PM

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I think (not sur) lyon is generating a mesh, so unless you recreate the mesh or modify it (which maybe lyon has stuff for but it wouldn't surprise me it does not), I think scaling would be your best bet

dark tapir Jun 16, 2023, 1:53 AM

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If you don't care about having a mesh you can use my library or steal the shader from it:
https://crates.io/crates/bevy_vector_shapes

#Draw Circle with changing radius efficiently