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A tool for creating visual novels for the Sega 32x. Work in progress.

License: Apache License 2.0

Batchfile 0.40% Makefile 1.16% C 14.60% Assembly 44.98% Python 35.58% Ren'Py 3.29%

32x visual-novel-engine compiler game-development

vn32x's Introduction

VN32X v0.2.0

This is a tool for creating graphic novels for the Sega 32X. Work in progress.

So far, it contains:

A C library for making visual novels;
Another C library to interface the VN library with the 32X hardware;
A tool to convert PNG images to a format compatible with the 32X;
A transpiler that translates a subset of the Ren'py scripting language to a C file (plus a few includes) that uses the VN library;
A Makefile that takes care of coordinating all of that.

In order to compile the library and the generated sources, you will need a C cross compiler for 32X; you can find one on http://sebastianmihai.com/main.php?t=106&n=Sega-32x-development-Eight-Queens

Manual

A manual can be found at: https://github.com/haroldo-ok/vn32x/blob/master/MANUAL.md

Implemented so far

Scripts for converting images to the proper format;
32K color mode;
Image rendering with cropping and optional translucency;
Antialised variable width font text rendering;
Word wrapping for the text;
Joypad input;
Word wrapping for the text boxes;
Menus;
Some image decompression caching to speed up image rendering;
Create an easy to use library to implement the graphical novels;
Implement a tool to automatically generate C source code from Ren'Py scripts.

In progress

An easy to use installer; see https://github.com/haroldo-ok/vn32x/releases/download/v0.2.0-alpha/vn32x-portable-0.2.0.7z for a 'portable' version;
A visual editor for the scripts; see https://github.com/haroldo-ok/BlocklyVN32X for a work-in-progress;

Not implemented, but planned

Better error handling;
Correcting bug where the parser freaks out on empty lines;
Support for variables;
Support for conditionals;
Support for a (limited) Python subset;
More than one character on screen;
Support for hicolor images;
Documentation and tutorials;
Digital audio playback.

vn32x's People

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vn32x's Issues

Allow changing the ROM description string

Currently, the ROM is always compiled with the description "Example startup code for 32X".

Create function `vnTextF()`

This function would be have a similar functionality to vnText(), except it would have syntax similar to printf()

32K colors / image resolution

Interesting project, I hope you bring it to the final stage.
About issues:
Is 32K color mode work in vn32x-portable-0.2.0 ? I assumed that the resolution of the pictures (320x202) that were attached in the SCRIPT folder is related to the capabilities of the 32X [320×204 "direct color" mode: 32,768 simultaneous colors on screen; each pixel is the color value (limits screen size)], but my 320x202-15bit-colors picture was reduced in colors anyway.

Guess I can't just use a raw ren'py script without first making some changes, since I was able to successfully generate the ROM from the simplest script, with one picture and one line of the text (more complex variations did not work out).

I'm not a programmer, so a tutorial/guide with examples from you would be very helpful, and not only for me, probably.

Implement support for music

Reference:

Interrupt driven DMA PWM audio: http://gendev.spritesmind.net/forum/viewtopic.php?t=1253
Advanced Audio Compression on the 32X: https://segaxtreme.net/threads/advanced-audio-compression-on-the-32x.17708/

Large input lag

The game has a large input lag when images and background are displayed at the same time.

True color images aren't being converted correctly

The images appear corrupted on screen if they come from a true color source.
The conversion should be done automatically.

Pad the ROMs to an adequate size

http://gendev.spritesmind.net/forum/viewtopic.php?f=4&t=2732#p32636

Implement support for sound effects

Allow displaying who is talking.

Currently, it always display "Test"; it would be nice to be able to know who's talking.

Compute correct ROM checksum on compilation.

Support for multicolored fonts.

As reported by Muzzy: http://gendev.spritesmind.net/forum/viewtopic.php?p=32857#p32857
Currently the fonts are always handled as grayscale, with the brightness serving as opacity.
This works well for fonts converted from TrueType, but may prevent users from using borders in custom fonts, for example.

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