Something y'all are probably not used to - but I figured I'd share it anyway, as this is an 'off topic' journey I've been on this past month! Kieren Boal's 3D Engine journey; for fun, of course! (CPU rendered, without the aid of any libraries or anything; pure CPU code rendered 3D!) So far, the code is 536 lines long, supports per-vertex colors, diffuse shaders, and .obj rendering. Supports backface culling, .obj loading, difuse per-vertex colors, painters algorithm and a few other various things to make it run. The things below are in order of milestones I've made going through making this engine. Gyazo links for animated GIFs of the things if you wish to watch. 3D cube: Literally vertex rendering. https://gyazo.com/92b834a0fbc86d9d26b2c3c6a0a74fd3 Obj rendering: No backface culling, draws the WHOLE mesh, regardless of anything, random colors per vertex Per-vertex culling: https://prnt.sc/1upkruh More obj rendering, but also culls the vertexs that are not directly facing the camera, saves a few (wireframe) polygons being rendered! https://gyazo.com/8d9a0a12cfc6eadcb47435101741e920 Advanced vertex rendered: Per-vertex random color removed, optimized the vertex drawing algorithm https://gyazo.com/d94de6881e7f6b42de46d2da2358119d HD support: Similar to above, but HD support, for 1080p rendering. ~45fps https://gyazo.com/310cfba6c22ca7fa72d3ebcd2df69620 Full polly (buggy) rendering: Supports full vertex polygon rendering, but these random-*** lines keep appearing. Bug in the polygon filling algorithm. https://gyazo.com/1fdc1eeda84dbb2434daff35a2ffae9c Per-vertex colors rendering: Same bugs as before, random-*** lines as part of the pollyfill. Also notice the buggy backfaces drawing over eachother https://gyazo.com/8a696fbb7913fcf5b55f671c7691659d Per-vertex colors, with the buggy lines fixed: Buggy polyfil lines fixed; backface culling not yet fixed. https://gyazo.com/d775fadf2cedf3d5a2a0e1b4603831c8 Importing of 'Quad' models: Quads have a 4/3 ratio rather than a 3/3 ratio... so every 2nd tri is missing https://gyazo.com/f576c87ad27b0a9e6ec5d8fa88413931 https://gyazo.com/f65540570a6f0d44d2c5f2145d471cd0 Fixed 'Quad' models: HD, fully quad model, no issues! https://gyazo.com/20d065bfabaf056a0e33ac62c86fc899 Even spongebob https://gyazo.com/14252d7fc92e432cd364ec7a9fb3f285 Lastly, fully HD, quad models, clipping and painters algorithm to avoid backface draws: https://gyazo.com/8b708c2272444069a4dd2fc3e8b74cc6 Thus concludes my current adventure into learning 3D stuff - its been a hell of a journey, and full of lots of pain; but has been a great learning experience! Cheers.
