A short script that takes an xpdata struct as an argument and attempts to read the fixed float vec3 format for sega saturn

read_verts.js

"use strict";

const fs = require("fs");
const fp = fs.readFileSync("hwram.bin");

const xpdata = {
  offset: 0x056424,
  vlist_offset: 0x60561cc,
  vlist_count: 0x000010,
  plist_offset: 0x605628c,
  plist_count: 0x000009,
  attr_offset: 0x6056394,
  vntbl: 0x60562d4
};

let ofs = 0x561cc;
for(let i = 0; i < 0x000010; i++) {

        let axis = ["x", "y", "z"];
        let vec = {};

        axis.forEach(key => {
                let num = fp.readInt16BE(ofs + 0);
                let dec = fp.readUInt16BE(ofs + 2) / 0xffff;

                let a = num.toString();
                let b = dec.toFixed(3).split(".").pop();
                ofs += 4;
                vec[key] = a + "." + b;
        });

        console.log(vec);

}