Ray Intersection

Ray–Surface Intersection An interactive geometry primer A ray tracer renders images by casting rays from a camera through every pixel and finding where each ray hits a surface. This tool explores the core mathematical question: how do you compute that intersection? Choose a geometry — sphere, cylinder, or torus — and explore it across three lenses: 📐 Theory Derive the intersection polynomial step by step 🎮 Intuition Aim a ray interactively and watch the roots move 💻 Code Edit live GLSL — see the shader render in real time