mirror of https://github.com/pret/pokecrystal.git
124 lines
6.6 KiB
Markdown
124 lines
6.6 KiB
Markdown
# FAQ
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## Questions
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- [What is pokecrystal11.gbc?](#what-is-pokecrystal11gbc)
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- [What is pokecrystal_au.gbc?](#what-is-pokecrystal_augbc)
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- [I can't build the ROM, `make` just prints an error!](#i-cant-build-the-rom-make-just-prints-an-error)
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- [`gcc`: command not found](#gcc-command-not-found)
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- ["ERROR: `UNION` already defined"](#error-union-already-defined)
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- ["ERROR: Macro not defined"](#error-macro-not-defined)
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- ["Expression must be 8-bit"](#expression-must-be-8-bit)
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- ["Segmentation fault" from `rgbgfx`](#segmentation-fault-from-rgbgfx)
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- ["Section is too big" or "Unable to place section in bank"](#section-is-too-big-or-unable-to-place-section-in-bank)
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- ["Invalid file or object file version"](#invalid-file-or-object-file-version)
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- ["Syntax error"](#syntax-error)
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- [How do I edit maps?](#how-do-i-edit-maps)
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- [How do I edit the colors of an image?](#how-do-i-edit-the-colors-of-an-image)
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- [How do I write new features?](#how-do-i-write-new-features)
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- [How do I share code on Discord?](#how-do-i-share-code-on-discord)
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- [I need more help!](#i-need-more-help)
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## What is pokecrystal11.gbc?
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Version 1.1 of Pokémon Crystal, which fixed some issues with the initial international release. `make crystal11` defines `_CRYSTAL11` so the assembly builds the changed version.
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## What is pokecrystal_au.gbc?
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The Australian release of Pokémon Crystal, which is based on the international 1.1 release but censors gambling references from the Game Corners. `make crystal_au` defines `_CRYSTAL11` and `_CRYSTAL_AU` so the assembly builds the changed version.
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## I can't build the ROM, `make` just prints an error!
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Reread [INSTALL.md](INSTALL.md) carefully, and make sure you're following all its steps.
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### `gcc`: command not found
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You need to install `gcc`. If you're using Cygwin, re-run its setup, and at "Select Packages", choose to install `gcc-core`.
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### "ERROR: `UNION` already defined"
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Download [**rgbds 0.4.1**][rgbds] or newer. Older versions will not work.
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### "ERROR: Macro not defined"
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Download [**rgbds 0.4.1**][rgbds] or newer. Older versions will not work.
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### "Expression must be 8-bit"
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Download [**rgbds 0.4.1**][rgbds] or newer. Older versions will not work.
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### "Segmentation fault" from `rgbgfx`
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If you are using 64-bit Windows, download [**64-bit Cygwin**][cygwin] and [**64-bit rgbds**][rgbds].
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### "Section is too big" or "Unable to place section in bank"
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If you have not changed any of the asm, make sure you have the latest version of pokecrystal and the correct version of rgbds (see [INSTALL.md](INSTALL.md)).
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If you added or changed any code, it has to fit in the **memory banks**. The 2MB ROM is divided into 128 banks of 4KB ($4000 bytes) each, numbered $00 to $7F. The linkerscript [layout.link](layout.link) lists which `SECTION`s go in which banks. Try moving some code into a new section.
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### "Invalid file or object file version"
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Run `make clean` to remove all the old `o` files, then re-run `make`.
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### "Syntax error"
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If you have not changed any of the asm, make sure you have the latest version of pokecrystal and the correct version of rgbds (see [INSTALL.md](INSTALL.md)).
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If you added or changed any code, you've made a mistake while writing some of it. Re-read the modifications you've made to the file it complains about and try to compare them with other code.
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## How do I edit maps?
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For `asm` scripts, read [docs/map_event_scripts.md](https://pret.github.io/pokecrystal/map_event_scripts). For `blk` layouts, use [Polished Map][polished-map].
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## How do I edit the colors of an image?
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Most `.png` images are paletted PNGs. You can edit these with any program that supports creating PNGs with palette information. These palettes should consist of exactly 4 colors. Additionally, for Pokémon images, the first color should be white, and the last black. Tools such as Paint and [GIMP](gimp) will do the right job, while other tools such as [paint.net](paintdotnet) or Photoshop might mess it up and output palettes of 255 colors even though only using 4. You may try using tools like [GraphicsGale](graphicsgale) or [IrfanView](irfanview) to fix this, or sometimes resaving the image in Paint seems to help.
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Some image `.png` files are grayscale. This indicates that even though these images do have proper colors in-game, they're shared with something else, and as such changing them will affect other things as well. Don't try opening the `.2bpp` files, these only contain the image data as well, not the palettes.
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It really depends on what image you're trying to change the colors of, where these colors are specified. Try looking for related files or `.pal` files.
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## How do I write new features?
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There are a number of special-purpose scripting languages, as described in [docs](https://pret.github.io/pokecrystal/). For more general features, you'll need to code directly in [assembly language][asm]. Some of the [tutorials][tutorials] for specific features may also be helpful.
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## How do I share code on Discord?
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If you're looking for help on Discord, you'll probably need to share your code. How to do this:
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- Post *short* pieces of code in Discord messages, surrounded with three <code>\`\`\`backticks\`\`\`</code> to make a [code block][markdown].
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- Post longer pieces of code by linking to [GitHub Gist][gist], [Pastebin][pastebin], [Hastebin][hastebin], or other such sites.
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- Share your entire pokecrystal project at once by hosting it on GitHub as a fork of this repository. Read the [GitHub Help][forkhelp] for details.
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If your code is on GitHub, you can [link to specific lines][snippethelp]. Put "`#L42`" at the end of a URL to link to line 42, or "`#L10-L20`" to link to lines 10-20. For example: [https://github.com/pret/pokecrystal/blob/master/main.asm#L21-L26](https://github.com/pret/pokecrystal/blob/master/main.asm#L21-L26)
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## I need more help!
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Try asking on Discord or IRC (see [README.md](README.md)).
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[cygwin]: https://cygwin.com/install.html
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[rgbds]: https://github.com/gbdev/rgbds/releases
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[polished-map]: https://github.com/Rangi42/polished-map
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[gimp]: https://www.gimp.org/
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[paintdotnet]: https://www.getpaint.net/
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[graphicsgale]: https://graphicsgale.com/us/
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[irfanview]: https://www.irfanview.com/
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[asm]: https://github.com/pret/pokecrystal/wiki/Assembly-programming
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[tutorials]: https://github.com/pret/pokecrystal/wiki/Tutorials
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[markdown]: https://support.discordapp.com/hc/en-us/articles/210298617
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[gist]: https://gist.github.com/
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[pastebin]: https://pastebin.com/
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[hastebin]: https://hastebin.com/
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[forkhelp]: https://help.github.com/en/github/getting-started-with-github/fork-a-repo
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[snippethelp]: https://help.github.com/en/github/managing-your-work-on-github/creating-a-permanent-link-to-a-code-snippet
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