Official website for Sunchild Debut Online (SDO), an experimental graphical MUD built in public. Devlogs, updates, and playtests.

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2026-02-27 creating sec_grid and sec_level

I’m working on the grid security levels. There are 7 levels of security, displayed in different colors. You can’t go in sec-zones higher than your current sec-level. Implemented both server-side and client-side. Optimizing the shader right now.

We need this because the grid will be filled with the programming blocks that drive the ship’s behavior, and that the agents will interact with (see esolang for more about this). Since everything is player-craftable, we want security levels to protect the vital parts of the OS: critical zone are only accessible to higher ranking agents, PC or NPC.

Messages sent between the sec-zones inherits their security level from their origin, so they can’t be messed with by lower level blocks, in low-sec zones.

The map is infinite, and the security zones are constant. Lore-wise, they’re determined by the hardware. Implementation wise, we’re using a custom seeded random generation algorithm, both on the server and in the shader that displays the grid. The intended gameplay is territorial “dispute” between the three factions.

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This website is the landing page of our upcoming video game SUNCHILD DEBUT ONLINE. Development is public and updated weekly, as part of the creation process.

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