alecjacobson
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alpha-wrap
A CGAL-free, MIT-licensed reimplementation of the Alpha Wrapping algorithm that takes a defective triangle soup and produces a watertight, manifold, outward-oriented mesh with controllable level of detail and tightness.
AI 仓库情报摘要
FR-AI / ANALYSIS为什么值得关注
它是少数几个将主流游戏移植到这款冷门日系主机的项目之一，使用真正的 DOOM 引擎（通过 PrBoom 和 GBADoom），搭配定制的硬件后端，甚至支持 Loopy 内置的热敏打印机。
适合谁使用
- 复古游戏爱好者和收藏家
- 对异种硬件移植感兴趣的主机开发爱好者
- 寻找独特运行平台的 DOOM 移植版收藏者
- 从事 SH-1 系统逆向工程或硬件破解的研究人员
典型使用场景
- 在真实的 Casio Loopy 上体验 DOOM 前六个分享关卡
- 借助游戏引擎测试 Loopy 的 VDP、音效芯片和打印机功能
- 学习如何将复杂 C 代码移植到资源受限的大端 SH-1 系统
- 在复古计算活动中展示 Loopy 的硬件能力
项目优势
- 使用真正的 DOOM 引擎（id Software 源码经 PrBoom 和 GBADoom 继承而来），而非重新实现
- 支持音乐（通过 uPD937 MIDI 合成器）和 PCM 音效（需额外硬件），并内置截图打印功能
- 提供多种编译选项（串口日志、开发跳关、禁用音乐/音效）以适应 ROM 空间限制
- 附带完整的构建系统和可选音效的 RP2040 固件
使用前须知
- 性能极低：真机上约 8–15 FPS，更像技术演示而非可玩游戏
- 需要特定的 SH-1 大端 GCC 工具链以及 Floopy Drive 烧录卡才能在真机上运行
- 音效需要额外外部硬件（RP2040、DAC、接线）及对应固件，否则游戏仅有音乐
README 快速开始
LoopyDOOM
A sloppy unfinished port of DOOM to the Casio Loopy — a 1995 Japanese console built around a Hitachi SH-1 at 16 MHz, big-endian, with about 512 KB of RAM and a built-in thermal sticker printer. Requires the Floopy Drive flashcart if you want to run this on actual hardware.
This is the real engine, not a reimplementation: id's DOOM by way of PrBoom and GBADoom, with a new hardware backend for the Loopy's VDP, timers, gamepad, and sound chip.
Disclaimer: This is very unpolished. Really more of a tech demo than a finished product
Featured in https://www.youtube.com/watch?v=nDe06uY5C40
Status
| Maps | E1M1 – E1M6 (as much as I could fit in 4MB of ROM) |
| Video | 8bpp VDP bitmap layer, double-buffered |
| Music | uPD937 synth over SCI1 MIDI, all six maps |
| Sound effects | PCM, played by the cartridge's RP2040 — needs the companion firmware and a DAC |
| Screenshot printing | Options menu → prints the current frame on the console's thermal printer (if it doesn't jam, of course!!) |
| Performance | roughly 8-15 fps on hardware; runs way faster in LoopyMSE |
Lineage
id Software's DOOM → PrBoom → GBADoom (doomhack) → LoopyDOOM.
The portable engine and much of the tree come from GBADoom. The Loopy hardware backend lives
under platform/, the boot and link glue under boot/ and casloopy.ld, and the build-time
WAD, music, and SFX bakers under tools/. HUD and menu graphics use Kippykip's
GBADoom-custom lumps.
Requirements
- An SH-1 big-endian
sh-elfGCC toolchain (--target=sh-elf --with-cpu=m1 --with-endian=big). A Dreamcast SH-4 toolchain will not work: it is little-endian and rejects-m1. The SH-1 has no divide instruction, so GCC emits__sdivsi3/__mulsi3calls that must resolve from an-m1 -mblibgcc. doom1.wad— the DOOM shareware IWAD.gbadoom.wad— Kippykip's GBADoom lumps, forSTGANUM0–9(narrow HUD digits; the wideSTTNUMfont overruns the small status bar) and forM_ARUN/M_GAMMA(options-menu items GBADoom added). Without the latter two, the OPTIONS menu crashes inW_GetNumForName.- Python 3, for the bakers.
Neither WAD is distributed here. See NOTICE.
Build
LOOPY_TOOLCHAIN
项目描述
An unofficial DOOM port for the Casio Loopy based on GBADoom
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