https://ahmedyabbas.github.io/tags/opengl/ Recent content in OpenGL on Ahmed Yasser - Portfolio https://ahmedyabbas.github.io/%3Clink%20or%20path%20of%20image%20for%20opengraph,%20twitter-cards%3E https://ahmedyabbas.github.io/%3Clink%20or%20path%20of%20image%20for%20opengraph,%20twitter-cards%3E Hugo -- 0.140.2 en-us Thu, 06 Jul 2023 00:00:00 +0000 https://ahmedyabbas.github.io/projects/timefall/ Thu, 06 Jul 2023 00:00:00 +0000 https://ahmedyabbas.github.io/projects/timefall/ <h1 id="timefall-flagship">Timefall (flagship)</h1> <p>Timefall is a game engine built from scratch in C++, originally inspired by <a href="https://www.youtube.com/playlist?list=PLlrATfBNZ98dC-V-N3m0Go4deliWHPFwT">The Cherno&rsquo;s Game Engine Series</a> and developed well beyond it since. The goal: a Windows-first engine with AAA-grade rendering quality, an editor workflow comparable to commercial tools, and a C#-scripted gameplay layer.</p> <h2 id="renderer">Renderer</h2> <p>A forward 3D PBR pipeline: metallic-roughness Cook-Torrance lighting (GGX/Smith/Schlick), energy compensation, geometric specular anti-aliasing, and normal mapping. Image-based lighting from HDR environment maps with prefiltered specular and diffuse irradiance convolution. Shadows for all three light types — cascaded shadow maps (up to 4 cascades) for directional lights, plus spot and point (cubemap) shadows, each with hard and PCSS soft-shadow modes. A full HDR pipeline with multiple tonemap operators (Reinhard, ACES, AgX, and more), alongside a 2D batch renderer running in parallel.</p>