http://jvega.xyz/tags/c/Recent content in C on Jorge VegaHugoenSat, 01 Dec 2018 10:59:56 +0100http://jvega.xyz/posts/cuddlycalculator/Thu, 29 Mar 2018 20:10:05 +0200http://jvega.xyz/posts/cuddlycalculator/<p>A fully custom graphing calculator built entirely in C, designed to run on low-resolution embedded displays (128×64 pixels). The project includes a custom graphics engine, a mathematical expression parser, and a desktop LCD simulator for development and testing.</p> <h2 id="components">Components</h2> <h3 id="graphics-library">Graphics Library</h3> <p>A pixel-based rendering engine built from scratch, featuring:</p> <ul> <li><strong>Pixel surface</strong> abstraction for framebuffer manipulation</li> <li><strong>Software renderer</strong> with font rendering, UI elements (scroll text, scroll lists, buttons), and texture support</li> <li><strong>Scene system</strong> with input handling and update loops</li> <li><strong>Math primitives</strong> — 2D/3D vectors, 3×3 matrices, and rectangles</li> <li>Two display backends: <strong>SDL2</strong> (graphical window) and <strong>ncurses</strong> (terminal)</li> </ul> <h3 id="math-interpreter">Math Interpreter</h3> <p>A recursive-descent expression parser that evaluates mathematical expressions with:</p>