BookFlip — primitive for transitions (glsl)

For AI agents: find the right skill in one call — curl -s "https://skills.varg.ai/api/search?q=<what the person wants>" returns the matching use case and the best skills with install commands, as markdown (Russian works too). Full index: https://skills.varg.ai/llms.txt. Every page has a markdown twin: add .md to its path. Before generating anything, show the person the options on the use-case page.

The first shot turns over like a book page, right to left, and lands on the next

Prompt that renders it frame-exact

Add the "BookFlip" transition from GL Transitions (by hong, MIT; https://gl-transitions.com/editor/BookFlip, GLSL source https://github.com/gl-transitions/gl-transitions/blob/master/transitions/BookFlip.glsl) between pages of a lookbook, a menu or a step-by-step: 1 s, ease-in-out. The page folds at the spine in the middle of the frame. Remotion: npm install gl-transitions @gl-transitions/remotion @remotion/transitions, then a <TransitionSeries.Transition> with presentation={glTransition({ name: "BookFlip" })} and timing={linearTiming({ durationInFrames: 30, easing: Easing.inOut(Easing.cubic) })} (30 frames at 30 fps). HyperFrames: draw the GLSL on a full-frame WebGL canvas over the cut, with the outgoing and incoming frames as the from/to textures, and compute progress from the composition time, clamp((t − cutStart) / 1, 0, 1) through the easing; never from requestAnimationFrame or a timer, so every frame renders the same. ffmpeg's xfade can't run GLSL. It has no parameters; give it 1.2 s or more so the fold reads on a phone.

Used in

More transitions