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3D Carousel: Rotate, Then Push
One rule places every card. rotateY() turns the card to its seat, which re-aims the card's own z axis outwards, and translateZ() then walks it along that new axis to the rim, so only --i changes. Swap the two and every card is pushed at the camera before it turns: the rotation swings one stack around the parent and you get a fan, not a ring. The radius is derived, not guessed. The cards are the sides of a regular polygon, each side one card plus one gap long, so r = (card + gap) / 2tan(180deg / n): pick the gap and the radius follows, which is why the count buttons set --n and nothing else. The spin is one keyframe on a registered --angle, so a drag can take the wheel and hand it straight back.
animationcssuicarouseljavascript3dinteractiontransformperspective