DX-Ball 1.07 / REA / N0zoM1z0 / EN
Recover a sound-pan function, then check its bytes
ENGLISH SUMMARY
Recover a sound-pan function, then check its bytes
Follow x86 instructions, caller references, and constants to reconstruct the game's position-to-pan calculation in C.
The question
How does a brick's screen position determine its sound's stereo pan?
The workflow
- Inspect pseudocode and assembly to recover a missing input.
- Follow the caller and read constants to reconstruct the C expression.
- Compare original-x86 results and replay a pinned compiler for byte matching.
Findings & output
The case documents 3,205 original-x86 comparison cases and a compiler replay matching all 63 function bytes.
Evidence scope
Validation covers this sound-pan function, not an entire reconstructed game. It depends on a matching target and pinned toolchain.
中文摘要
恢复一个音效声像函数，逐字节核对
从不完整的伪代码回到 x86 指令，追踪输入与常量，把横坐标到左右声道的计算写成 C，再与原版对比。
调查的问题
砖块的屏幕横坐标如何影响音效的左右声道位置？
怎么做的
- 检查目标函数的伪代码与汇编，找回缺失参数。
- 追调用方与内存常量，恢复 C 表达式。
- 对照原始 x86 返回值，再核对固定编译器生成的字节。
发现与产出
案例给出 3,205 组原始 x86 差分测试，以及完整 63 字节函数的编译匹配。
证据范围
验证范围是这个音效函数，不是整款游戏的完整重建。需要匹配的原始目标和固定工具链。
Original sources / 原始来源
Checked / 核对 2026-10-12 · Public code / 有公开代码