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Page curl

Free packv3.0.0-32DDeform

A page turn for any 2D sprite: the corner lifts, rolls over a cylinder and settles back, shaded so the roll reads as a curve. One entry on the sprite turns it on, and the GPU does all the work.

This is a Free pack. Every phaser.io account can use it in their games.

Released October 14, 2026 · updated October 20, 2026

Page curl: a screenshot of its demo
A note about these graphics

Expansion packs don't come with graphics. This screenshot is one way of drawing what the pack does, made for its demo: none of the sprites, tiles or backgrounds in it are in the pack.

That's by design. A pack is a game's logic, mechanics and effects, and it works with whatever art you give it. Some packs draw effects, backdrops or 3D scenes of their own, but none carries a game's sprites.

So the look is yours. Make the art on phaser.io, bring your own, or let your agent draw it in code: the same pack can look like anything.

What it does

Spawn a sprite with deform: { kind: 'curl', amount, speed } and its bottom-right corner rolls over a cylinder whose radius is amount, the fold advancing up the diagonal and back on the deform clock. The roll is lit, the overturned flap is shaded and the flat part ahead takes a contact shadow, so the page seems to have thickness without extra art.

It is vertex code in the renderer's sprite shader, one instanced draw like every deformer, with nothing to do on the CPU. A speed makes the page turn and return on its own; a speed of zero leaves phase to your code, for a page that follows a drag or a story beat.

Features

  • A page turn on any sprite — one deform entry at spawn; the sprite keeps its frame, size and layer.
  • Shaded like paper — a lit roll, a darker overturned flap and a contact shadow ahead of the fold.
  • Its own clock or yours — speed animates the turn; speed: 0 with phase scrubs it by hand.
  • Live changes — set h.deform.amount and h.deform.phase while it runs.

Good for

  • Books and storybooks — pages that turn on their own or as the reader drags.
  • Card games — a card peeling up from a stack.
  • Posters and notices — a corner coming away from a wall.
  • Page-flip transitions — a menu or a map turned away to reveal the next.

Make it yours

amount is the cylinder's radius in world units, at least 4. speed sets the clock's rate and phase its start; with speed at zero, phase alone sets the turn, fully over at π. Mirror the sprite with sx: -1 to curl the other side. Two different uses: a poster in a side-on scene whose corner peels and settles in a slow loop at speed: 0.22; and a book whose pages have speed: 0 while the game moves phase from 0 to π as the player drags.

A quick look

A curling page, changed while it runs:

game.spawn({ id: 'page', frame, width: 100, height: 140, deform: { kind: 'curl', amount: 18, speed: 0.22 } });
h.deform.amount = 30;   // a fatter roll
h.deform.phase = Math.PI;   // fully turned when speed is 0

Works with

  • render-auto — the renderer is the runtime for deformers; there is no separate deform pack to compose.
  • effects-2d — glows, outlines and dissolves keep bending with the deform beneath them.
  • video — a sprite showing a video curls like any other.

Good to know

  • It is 2D only, and the curling corner is always the bottom-right.
  • There is no back-face art: the overturned flap shows the same picture, and its thickness is shading.
  • A deformed sprite is drawn as a 24 by 64 grid of cells rather than one quad, so it costs more vertices.
  • For a card turning over its whole width rather than at a corner, the engine's built-in flip deform fits better.

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