Migrating Custom Tools from Cornerstone Legacy to Cornerstone3D: Challenges and Guidance

[ohif]

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@Dario_Espina: Good morning, I’m migrating a Cornestone Legacy web app to Cornerstone3D and I’m having troubles trying to use the old custom tools we implemented, is there an easy way to accomplish this?

![Syed_Pasha_[Ramsoft]] @Syed_Pasha_[Ramsoft]: https://www.cornerstonejs.org/docs/category/migration-guides

Migration Guides | Cornerstone.js

did you go through this?

@Dario_Espina: Yes, our app is rendering with the new Cornerstone3D v1, but our issue is with the tools, there’s something that Cornerstone doesn’t like and I cannot register to a toolgroup

![Syed_Pasha_[Ramsoft]] @Syed_Pasha_[Ramsoft]: hm interesting. we had once such setup where we were using older tools with newer cornerstone but that was way back. can you post the error you’re getting?

@Dario_Espina: sure

![Alireza_Sedghi] @Alireza_Sedghi: what custom tools? there is a good chance you need to rewrite it

![Syed_Pasha_[Ramsoft]] @Syed_Pasha_[Ramsoft]: did the tool structure change from legacy to cornerstone3d?

![Alireza_Sedghi] @Alireza_Sedghi: yes absolutely
here https://www.cornerstonejs.org/docs/migration-guides/legacy-to-3d

Legacy to 1.0 | Cornerstone.js

![Syed_Pasha_[Ramsoft]] @Syed_Pasha_[Ramsoft]: this is not specific to a custom tool isn’t it?

![Alireza_Sedghi] @Alireza_Sedghi: I’m not sure, it’s been some time
maybe if @Dario_Espina explain his custom tool there is a good chance the migration is simple

[Syed_Pasha_[Ramsoft]]: https://avatars.slack-edge.com/2024-12-17/8189486451876_4828af2e4cd49b510839_24.png
[Alireza_Sedghi]: https://avatars.slack-edge.com/2022-10-28/4314964600016_9c4c71a093ecc134ddfb_24.jpg