MX Simulator

Changes:

• Fixed crash when deleting decals.

Huge thanks to sethypeety for making a reproducible test case for this bug!

Windows users: https://mxsimulator.com/snapshots/mx-2025-03-26-1681.exe
Linux users: https://mxsimulator.com/snapshots/mxbin-2025-03-26-1681

Replace mx.exe or mxbin with one of the above files. The default location for mx.exe should be "C:\Program Files (x86)\MX Simulator". Please note that the ".exe" extension is hidden in Windows so the file will just show as an application named "mx". I'd keep a backup of the originals since these aren't well tested.

Good to FINALLY have a fix for this, what exactly was causing the crash? Did it even have anything to do with the tread marks?

sethypeety wrote: ↑Fri Mar 28, 2025 1:24 am Good to FINALLY have a fix for this, what exactly was causing the crash? Did it even have anything to do with the tread marks?

The bug was actually triggered when you move the first/lowest decal to a new sector and then delete it.

The game keeps a map of which decals are in which grid sector for the terrain so it can easily draw the decals for a particular sector without drawing the whole list. So when you move a decal, it has to remove it from the sectors occupied by the previous position and add it to the sectors for the new position.

Also, when you delete a decal, it has to renumber everything in the map to reflect that. So if decal 3 is deleted, decal 4 becomes 3, 5 becomes 4 etc.

The bug was that when it removed it from the map, it used the new position instead of the old position, which left references to the decal in the wrong sectors. When you move the first decal, there are references to index 0 that shouldn't be there. When you delete it, it renumbers everything in the map and since there are unexpected 0s in the map, they get renumbered to -1. Later on it tries to build a vertex buffer using that invalid index and crashes.

Are we ever going to get a meaningful update?

Zooted wrote: ↑Mon Apr 07, 2025 7:52 pm Are we ever going to get a meaningful update?

Sorry! I know it's been slow lately.

jlv wrote: ↑Wed Apr 09, 2025 2:48 am Sorry! I know it's been slow lately.

it's okay sweet pookie, we love you and thank you for all you have already done for this community! Excited for that lighting update too

Wait, how is fixing a bug often preventing track builders from building tracks not worthwhile?

sethypeety wrote: ↑Thu Apr 10, 2025 5:07 pm Wait, how is fixing a bug often preventing track builders from building tracks not worthwhile?

Is it not possible to use a different snapshot as a workaround?

Zooted wrote: ↑Thu Apr 10, 2025 7:56 pm Is it not possible to use a different snapshot as a workaround?

You could, however if I'm not mistaken it's been a problem since the tread marks were added (which was multiple multiple ago) and if we got a title update before it got fixed you would have to build tracks on an outdated snapshot on an outdated version of the game. So while meaningless to most people it's good to fix these bugs rather than have us work around them.

jlv wrote: ↑Wed Apr 09, 2025 2:48 am

Zooted wrote: ↑Mon Apr 07, 2025 7:52 pm Are we ever going to get a meaningful update?

Sorry! I know it's been slow lately.

anychance we will get dynos again? I know its not that important but been around since 2015, so been a part of a few. Didn't know if you had plans of it or not

What do you think about the new Motocross The Game, JLV?

It looks impressive!

jlv wrote: ↑Sun Apr 20, 2025 2:41 amIt looks impressive!

Thank you master