Restructure the page so the first 4 viewports of scroll drive a
Three.js scene composited on top of the Antananarivo parachute video.
What's there:
- Three.js (ESM, r158 via importmap) renders a low-poly cargo airliner
built from primitives: cylinder fuselage, cone nose, sphere cockpit
(dark glass + emissive), box wings/tail/fin, cylinder engines with
torus intakes, gold trim band, navy fin with gold logo box. No
external model file.
- Hemisphere + directional + ambient lights tuned for golden-hour fill.
- 14 cloud spheres scattered around the plane, slowly rotating.
- GSAP + ScrollTrigger drive a single progress value scrubbed against
scroll position. Inside the rAF loop, the camera arcs from rear-left
(-0.6 rad) to front-right (+1.1 rad), radius dipping mid-flight, and
the plane rolls slightly with scroll.
- Three act labels (Paris CDG / Vol cargo / Antananarivo) cross-fade at
20%/40%-60%/72% scroll positions via a chained gsap timeline.
- Gold CTA button stays opacity:0 + pointer-events:none until the last
~10% of scroll, then fades and scales in. Hover transform rebuilt
without the old mouse-parallax tilt (fights the scroll animation).
- Scroll hint pill (chevron + "Faites défiler") at the bottom of the
first viewport, fades out on first scroll event.
- prefers-reduced-motion shortcut: scroll stage hidden, CTA visible,
no animation. Page reverts to a static screen with the video bg.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
