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samhyunandClaude Opus 5.5
e39e563408
The board's dot grid puts each mark on the device pixel nearest its page position, measured from the view's top-left. At a zoom of 1.0625 a step of 24 is 25.5 pixels, so every second mark falls halfway between two pixels, and a view a whole number of pixels on could put it on the other one: `round` sends halves away from zero, so a mark left of the view's origin went left and one right of it went right, and the origin `(px + offset) / scale` reached the half with another rounding error. A pan moved those marks by a pixel (up to 123 levels off). Positions are now rounded to 1/65536 px and then half up. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>