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`ScaleUpdateDetails.rotation` is `atan2(now) - atan2(start)`, not normalised: two fingers side by side rotated by 4° report -356°, which wins the multi-finger gesture race as a rotation. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Fixes #2275.
ScaleUpdateDetails.rotationisatan2(now) - atan2(start), not normalised. Two fingers side by side rotated by 4° report -356°, which wins the multi-finger gesture race as a rotation.Normalised to [-180°, 180°) where it is read. No behaviour change below ±180°.
Test:
test/gestures/rotation_normalisation_test.dart— on mastercamera.rotationends at -356° for a 4° gesture, 0 with the fix. Full suite passes (141).🤖 Generated with Claude Code