Add a mobile version

[mwestphal]

Context
F3D is a tool that let user visualize 3D models easily. Having a mobile android version would be benificial for the project.
A simple idea would be able to support opening a file attached to an email. iOS version could be considered as well.

Current status
@Meakk has created a prototype of an android app that rely on the libf3d: https://github.com/f3d-app/f3d-android

Some non-exhaustive related tasks

• Migrate to Kotlin
• Improve zoom and pan interaction (it jitters, there must be something wrong)
• Create CI to generate one .apk per architecture
• Add an hamburger menu to toggle some options (e.g. grid)

[drtrigon]

And provide the .apk files as a release (additionally or instead of putting it into google play).

[a251115100]

Expect this feature

[mwestphal]

devlopement is ongoing in #173

[mwestphal]

Moving to 2.2 unless you want to work on this @Meakk

[mwestphal]

@Meakk is this still planned ?

[Meakk]

No plan but I definitely want to do it.

[mwestphal]

@Meakk could you improve this issue description so that other could try to work on it ?

[zhiyuang]

Hi team, after I dive into the code, find that f3d rely on VTKOpenGLRenderer. Is it a obstacle to have a ios mobile version? I'm not that familiar with VTK, but I haven't found a VTKMetalRenderer or VTKVulkanRenderer.

[Meakk]

As far as I know, OpenGL is still supported on ios, even if it's deprecated.
We will switch to WebGPU at some point but it won't happen any time soon.

[zhiyuang]

Got it. Thanks Meakk

[mwestphal]

By the way @zhiyuang , do not hesitate to join our discord if you want to get involved :)

https://discord.f3d.app

[zhiyuang]

haha, actually I have joined before. thanks for reminding me 😄