https://peertube.pbento.pt/videos/watch/af0195a9-a83b-492f-b103-0442c77a88bb In this episode of the Dear Universe devlog, we upgrade our C multiplayer engine with a non-blocking, Raylib-style socket API and a 2-byte length-prefix protocol to handle TCP packet fragmentation cleanly. Next, we implement a 2D Perlin noise generator from scratch, fine-tuning scale and roughness to build procedural terrain. Finally, we fix isometric rendering issues by switching from wireframes to solid cubes, using a depth-sorting formula ($X + Z - Y$) to prevent overlap bugs, and adding directional side shading to give the 2.5D mountains realistic depth. Perlin noise interactive example: https://sven-knoblauch.github.io/projects/perlinnoise2D/perlinnoise2D.html Java implementation of Perlin Noise: https://gist.github.com/alksily/7a85a1898e65c936f861ee93516e397d Perlin noise in c: https://gist.github.com/nowl/828013 00:00 - Intro & Raylib-Style Socket API Design 03:00 - Structuring Byte Payloads & Length Readers 07:45 - The Packet Fragmentation Problem (Buffer Limits & Static Allocation) 12:15 - Implementing 2-Byte Packet Header Framing 18:30 - Accumulating Streamed TCP Chunks in Non-Blocking Sockets 22:30 - State Machine Implementation for is_message_ready 33:55 - Network Byte Deserialization & Struct Unpacking 42:15 - Debugging Network Protocol Errors (Length Mismatches) 46:25 - Validating Server-to-Client Chunk Synchronization 48:30 - Researching 2D Perlin Noise for Isometric Heightmaps 52:45 - Porting & Writing 2D Perlin Noise in C 1:01:45 - Building Frequency, Octaves & Cubic Smoothing Functions 1:10:40 - Fixing Coordinate System Wraparound for Negative Offsets 1:16:50 - Debugging Socket Hangs & Render Loop Locks 1:22:25 - Tuning Perlin Noise: Frequency vs. Depth & Map Scales 1:30:15 - Solving Isometric Depth Sorting & Occlusion Bugs 1:39:40 - Diagonal Slicing Math (X + Z - Y) vs. Painter's Algorithm 1:46:10 - Wireframe vs. Solid Cube Rasterization 1:51:30 - Debugging Artifacts & Column Generation Math 1:55:00 - Adding Directional Lighting & Shading for 3D Depth 2:01:20 - Final Generated 2.5D Mountainous Terrain & Next Steps Do not forget to like and subscribe! Sat, 26 Sep 2026 16:35:08 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://peertube.pbento.pt https://peertube.pbento.pt/client/assets/images/icons/icon-512x512.png https://peertube.pbento.pt/videos/watch/af0195a9-a83b-492f-b103-0442c77a88bb All rights reserved, unless otherwise specified in the terms specified at https://peertube.pbento.pt/about and potential licenses granted by each content's rightholder.