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ThemolxandClaude Opus 5.5
e9c8d703a7
The viewer's Rotation tool wrote start rotation + (atan2 angle now - atan2 angle at press), so the value jumped a full revolution back whenever the pointer crossed atan2's ±180° seam (left of the anchor) and could never pass 360°. Sum the per-frame angle change, wrapped to (-180°, 180°], instead: the value keeps growing across revolutions in both directions (1x +0.0°, -1x -90.0°…), Shift snaps the accumulated value to 45°, other selected layers follow, and one drag is still one undo step. Non-finite angles turn by nothing. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>