Runnable Tilemap / Sprite examples?

[fosskers]

The wolf sprite example defined like so:

(define-example sprite
  :title "Animated Sprites"
  (enter (make-instance 'simple-sprite :sprite-data (assets:asset :wolf) :name :sprite) scene)
  (enter (make-instance 'sidescroll-camera :zoom 10.0 :target (node :sprite scene)) scene)
  (enter (make-instance 'render-pass) scene))

unfortunately doesn't compile, due to assets not existing. The cat.png asset exists in data/, and I was wondering if :wolf (and also the :tilemap from tilemap.lisp) used to also be included somewhere.

For now I'll follow the Sprites page directly.

Thanks again.

[Shinmera]

? it sure does compile, what are you talking about.

[fosskers]

It doesn't seem to compile on my end, nor is there any filename with "wolf" in it in the repo. Is something perhaps unpushed?

I also tried (// 'trial 'wolf), but that didn't seem to work either. What am I overlooking here?

[fosskers]

Ah seems like in general, sprites need to be called via asset, not //, or else a condition is raised in handle when attempting to render. Seems like sprites can't be "placeheld"?

[compufox]

I think you’re missing trial-assets: https://github.com/Shirakumo/trial-assets

[fosskers]

That would be it, thanks!

And now I see that the examples are bundled and released separately here. My issue was that I had naively attempted to replicate the Wolf example in my own code, similar to the Quickstart.

I will add a note to the Examples page later about this.

[Shinmera]

The examples use their own package, which has its own nicknames and macros and everything. Why would you assume you can just copy-paste code willy-nilly into a different environment and have it work?

The assets used for the examples are also really unrelated to the actual code that they illustrate. The assets are separated into the trial-assets repo exactly so they don't get pulled in for every project.

[fosskers]

Why would you assume you can just copy-paste code willy-nilly into a different environment and have it work?

To clarify, I was attempting:

(enter (make-instance 'simple-sprite :sprite-data (assets:asset :wolf) :name :sprite) scene)

in my own setup-scene. I had assumed it would work because using cat.png had worked in the Quickstart guide, and I thought the Examples would function in the same way. That was wrong, because I was unaware that the examples were bundled separately by you here.

[Shinmera]

Trial's own asset function takes two args and comes from the trial package. This is an asset function that takes one argument and comes from a different package altogether.

[fosskers]

Thanks for the clarification, I understand the difference now.

While you're here, can you elaborate on why // isn't to be used for sprites, as in:

(make-instance 'animated-sprite :sprite-data (asset 'workbench 'sprite))

found on the Sprites page? Indeed // causes explosions (as did experimental attempts to call stage on sprites).

[Shinmera]

// returns a resource like a texture or a buffer. The sprite needs additional metadata to function, which is only present on the asset.