/en/tags/sdf/Recent content in Sdf on Feynman's BlogHugoen-USTue, 25 Aug 2026 12:00:00 +0800/en/posts/threejs-glsl-math/Tue, 25 Aug 2026 12:00:00 +0800/en/posts/threejs-glsl-math/<blockquote class="blockquote-regular"> <p>Last lesson covered GLSL basics and ShaderMaterial data channels. This lesson dives deep into math functions — mix / step / smoothstep for gradients and boundaries, sin / cos for waves, dot / cross for lighting and Fresnel, fract / mod for repeating patterns. These functions form the core toolchain from &ldquo;a UV coordinate&rdquo; to &ldquo;a final image&rdquo;.</p> </blockquote> <h2 id="01-learning-objectives">01 Learning Objectives</h2> <p>This lesson focuses on practical applications of GLSL math functions:</p>