Ability to sample textures in modifiers

[msvbg]

Describe the solution you'd like Add the ability to sample a texture in Hanabi modifiers.

Describe why you want that solution. Is this related to a problem? There are a variety of ways this could be applied, like spawning particles in interesting patterns using pre-made textures (like Noita does), or crudely approximating 2D collisions on the GPU by intersecting particles with a world texture.

[djeedai]

@msvbg would you mind expanding on "like Noita does"? I'm always curious to learn about particle effect techniques, but I'm not familiar about any tech talk or presentation about Noita.

On the feature itself yes this is planned.

[msvbg]

I believe I got it from this place: https://noita.fandom.com/wiki/Modding:_Image_Emitters.

https://github.com/user-attachments/assets/ef2cf55c-ad0a-4dde-aa20-f488fec6547b

[djeedai]

Added some initial support. This is fairly limited but it should be easy enough to build on it to add more features.

[msvbg]

Interesting, I'll have a look at this later!