# Page Not Found

The URL `chapter21` does not exist. This page may have been moved, renamed, or deleted.

## Suggested Pages

You may be looking for one of the following:
- [Chapter 21 - Indirect drawing (animated models) and compute shaders](https://ahbejarano.gitbook.io/lwjglgamedev/chapter-21.md)
- [Chapter 01 - First steps](https://ahbejarano.gitbook.io/lwjglgamedev/chapter-01.md)
- [Chapter 10 - GUI (Imgui)](https://ahbejarano.gitbook.io/lwjglgamedev/chapter-10.md)
- [Chapter 11 - Lights](https://ahbejarano.gitbook.io/lwjglgamedev/chapter-11.md)
- [Chapter 12 - Sky Box](https://ahbejarano.gitbook.io/lwjglgamedev/chapter-12.md)

## How to find the correct page

If the exact page cannot be found, you can still retrieve the information using the documentation query interface.

### Option 1 — Ask a question (recommended)

Perform an HTTP GET request on the documentation index with the `ask` parameter:

```
GET https://ahbejarano.gitbook.io/lwjglgamedev/chapter-21.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

### Option 2 — Browse the documentation index

Full index: https://ahbejarano.gitbook.io/lwjglgamedev/sitemap.md

Use this to discover valid page paths or navigate the documentation structure.

### Option 3 — Retrieve the full documentation corpus

Full export: https://ahbejarano.gitbook.io/lwjglgamedev/llms-full.txt

Use this to access all content at once and perform your own parsing or retrieval. It will be more expensive.

## Tips for requesting documentation

Prefer `.md` URLs for structured content, append `.md` to URLs (e.g., `/lwjglgamedev/chapter-21.md`).

You may also use `Accept: text/markdown` header for content negotiation.