Winding 1.2.0

Four limitations gone. Smoke sorted particle by particle, tilemaps that hold up zoomed out,
shadows from open surfaces, and text in the world's shaped scripts -- each shown wrong in 1.1.1
before it was fixed, none of it adding a dependency.

Added

• Alpha particles are sorted. A blend: 'alpha' emitter's live particles are put far to near on
  the GPU every frame -- keyed by log depth, a counting sort, an indirect draw -- so dense smoke no
  longer shows a far particle over a near one, and dead slots are not drawn at all. About 0.2 ms
  for an emitter of a thousand on Iris Xe.
• Tilemaps are mipmapped. Each tileset is copied with every tile alone in a cell, its edges
  stretched out, and mipped down to tiles two texels across, so a map zoomed far out is filtered
  instead of shimmering, and no tile takes in its neighbour.
• Open surfaces cast shadows from either side. A mesh with an edge only one triangle uses --
  a plane, a roof of one sheet -- is drawn whole into shadow maps; closed meshes keep their
  back faces, and with them freedom from acne. Found at load, about 40 ms for Sponza.
• Text in shaped scripts. Arabic, Hebrew, the Indic scripts, Thai and others are drawn a word
  at a time, shaped by the browser; Thai, Lao, Khmer and Burmese break between words though they
  have no spaces; a line that starts right-to-left runs right to left.

Fixed

• A burst-only emitter that burst again lost the particles of the last burst while they had
  seconds to live: its ring held one burst, and a grown ring started its next births over the
  oldest live particle.
• An emitter in the next scene drawn could take over another scene's particles, still alive,
  when the two emitters' nodes had the same number in their scenes.

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npm install winding-engine