Files
feuerwerk/tests
adminandClaude Opus 5.5 aef1eba917
game-maker / gate (push) Successful in 2m55s
game-maker / suite (push) Successful in 9m21s
Stop thin lines between tiles of a nearest tilemap at odd zooms
At zoom levels that do not land quarter edges on whole screen pixels,
a tilemap whose texture uses Nearest showed one-pixel lines in the
wrong colour. The float uv of a pixel centre right at a quad edge
could round onto the first texel of the neighbouring quarter in the
sheet, which is usually a different tile. Terrain sheets showed it
most, because every tile is four quads there.

- Nearest now pulls the uvs 0.02 texel inside each quarter. That is
  far below half a texel, so every picked texel stays the same and
  pixel art keeps its size.
- Linear keeps its half-texel inset.
- The first draft used 0.01. The user raised it to 0.02 after
  checking the result in the browser.

Tests:
- ./check.sh: 156 files, 2299 tests, CHECK EXIT 0 (before 2298).
- New unit test: every nearest uv sits strictly inside its quarter,
  by less than 0.05 texel. Two older tests now expect the inset.
- Counter-check: with no inset for nearest the new test and the
  inset test fail.
- No e2e check. The user checked the result in the browser.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-09-24 07:26:46 +02:00
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