Reanimate: Haskell library for building declarative animations from SVG graphics

Re:Reanimate: Haskell library for building declarative anima... by lilyball on Wednesday December 21, 2022 @12:37AM (#34077076)

Is this the discussion you're referring to? https://github.com/reanimate/reanimate/discussions/210

It's actually pretty interesting to read. The author makes a not totally unreasonable argument as for why it uses unsafePerformIO.

Now what I'm really curious about is why the very first example on the site I clicked into the source code for, a simple 59-line example, is using unsafePerformIO. That actually worries me more because it suggests that as a user I might have to use unsafePerformIO. https://github.com/reanimate/reanimate/blob/d4d3898831edb4aa...

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Re:Reanimate: Haskell library for building declarative anima... by secdeal on Wednesday December 21, 2022 @07:29AM (#34079799)

> Now what I'm really curious about is why [...] a simple 59-line example, is using unsafePerformIO

It seems to me that they are using the physics engine Chipmunk2D for that Animation which has bindings with IO in their signature.

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Re:Reanimate: Haskell library for building declarative anima... by lilyball on Wednesday December 21, 2022 @04:08PM (#34086419)

The Reanimate site says that it ships with Chipmunk2D, and the example I linked shows both

  import Chiphunk.Low
  import Reanimate.Chiphunk

However I can't find any reference to Reanimate.Chiphunk anywhere, and if I search the repo for "chiphunk" I just see this example file, the readme, and a couple of YAML files. So I am very confused now.

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