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#interaction

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2026-06-09 svg maps interaction

SVG from Zero to Senior · Part 15 — Interactive Maps with Pan & Zoom

The grand finale: drive the viewBox with the mouse to build pan and zoom-toward-cursor navigation — the engine behind every web map. Drag-to-pan math, the zoom-to-point formula, non-scaling strokes, and choropleth regions. With a live map.
2026-06-09 threejs 3d interaction

Three.js from Zero to Senior · Part 9 — Raycasting & Interaction

Turn a scene into a UI: how a Raycaster picks objects under the cursor, normalized device coordinates, hover and click handling, performance tips for picking, and dragging objects — with a live hover-and-select demo.