Maximum Tune 3 .igb models

[avwrtn]

I've been aware from a long time now that the Alchemy .igb models are considered impossible to access, however in recent years the Project Diva community seem to have learned a thing or two about Alchemy and those games. I want to ask if anybody can help get an understanding for the Maximum Tune 3 arcade games and maybe be able to find a reliable way to export those .igb into modern formats. Before anybody tells me to just look at the HD games, I understand that the HD games in this series have been figured out, but I'm only interested in preservation and documentation of MT3.

My coding knowledge is very minimal, so I'll say what I do know.
Alchemy from the Project Diva forums can open a small amount of .igb files from MT3 such as courses, leftover test models and some menu 3D elements. However, it cannot open most of those same models from the later MT3DX-3DX+.
It appears all the data needed for the game engines such as, the 3D geometry, textures and materials, are all included in the files.

One interesting thing that could be looked at is the wheel models. For some reason MT3 uses very high polygon wheel models which are only seen in the menus when you would unlock them. I would love to document these and compare the quality to modern games.

Here's the link to the PD forum post about Alchemy: https://projectdiva.net/community/threa ... dule.1883/
And example models: https://drive.google.com/file/d/1k636vK ... sp=sharing

[Durik256]

.igb models MT3. the wheel models.

[avwrtn]

I didn't expect that to happen quickly, well done!
Where can I find that app? Is it yours? It almost looks like a Noesis tool.

[avwrtn]

.igb models MT3. the wheel models.

Hey, is there any chance you could share that mesh finder app please? I cannot seem to find it anywhere. No other hex to obj apps has that auto generate face feature. Manually creating thousands of ploygons is going to be a lot of pain.

[shakotay2]

No other hex to obj apps has that auto generate face feature.

What are you talking about? hex2obj was one the first if not the first to have it.
.

wheel-igb.jpg

[avwrtn]

My mistake, I tried hex2obj but I couldn't find 0.24e so I got the 0.24d exe and didn't realise it's meant to be a full zip. And even then zippyshare is geo-restricted for me like the tutorial says. My bad.

[shakotay2]

The files had to be split up to 3 (three) zips, starting from here:

(because of 250 kB size restriction of appended files)

[Durik256]

looks like a Noesis tool.

yes its noesis, and yes this my (tool)plugin with noewin. created just for convenience, for yourself.

"autoTriangles" you can do it in noesis:

Code: Select all

bs.seek(1761231)
rapi.rpgBindPositionBuffer(bs.readBytes(35100*12), noesis.RPGEODATA_FLOAT, 12)
rapi.rpgCommitTriangles(None, noesis.RPGEODATA_USHORT, 35100, noesis.RPGEO_TRIANGLE)

or just use python (drop file on this script) it will create an *.obj:

Code: Select all

import sys
import struct

input = sys.argv[1]

with open(input, 'rb') as rb, open(input.replace('.igb', '.obj'), 'w') as wb:
    rb.seek(1761231)
    vert = struct.unpack('%if'%(35100*3), rb.read(35100*12))
    
    for x in range(0, len(vert), 3):
        wb.write('v %f %f %f \n'%vert[x:x+3])
        
    for x in range(1, 35100, 3):
        wb.write('f %i %i %i \n'%(x, x + 1, x + 2))

or c++:

Code: Select all

#define _CRT_SECURE_NO_DEPRECATE
#include <iostream>

int main(int argc, char* argv[])
{
    if (argc > 1) 
    {
        FILE* rb = fopen(argv[1], "rb");
        FILE* obj = fopen("wheel.obj", "w");
        
        float* vert = new float[35100 * 12];

        fseek(rb, 1761231, 0);
        fread(vert, 4, 35100 * 3, rb);

        for(int i = 0; i < 35100 * 3; i+=3)
            fprintf(obj, "v %f %f %f \n", vert[i], vert[i+1], vert[i+2]);

        for (int i = 1; i < 35100; i += 3)
            fprintf(obj, "f %i %i %i \n", i, i + 1, i + 2);
    
    fclose(rb );
    fclose(obj);
    }
    std::cout << "Done!\n";
}

c++_example.exe
or C#:

Code: Select all

using System.IO;

namespace example
{
    internal class Program
    {
        static void Main(string[] args)
        {
            if (args.Length > 0)
            {
                float[] vert = new float[35100 * 12];

                using (var InStream = File.Open(args[0], FileMode.Open))
                {
                    using (var reader = new BinaryReader(InStream))
                    {
                        InStream.Seek(1761231, SeekOrigin.Begin);
                        for (int i = 0; i < 35100 * 12; i++)
                            vert[i] = reader.ReadSingle();
                    }
                }

                using (var OutStream = new StreamWriter(args[0].Replace(".igb", ".obj")))
                {
                    for (int i = 0; i < 35100 * 3; i += 3)
                        OutStream.WriteLine($"v {vert[i]} {vert[i + 1]} {vert[i + 2]}".Replace(',', '.'));

                    for (int i = 1; i < 35100; i += 3)
                        OutStream.WriteLine($"f {i} {i + 1} {i + 2}");
                }
            }
        }
    }
}

c#_example.exe

wheel_python_script.png

well, or use hex2obj