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Fix inverted pen Y tilt on macOS and add tilt display to example

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- Negate tilt.y in Cocoa pen handling to correct inverted Y tilt axis
- Update drawing example to display X/Y tilt values for visualization
- see 0f128fd7c5/src/plugins/platforms/cocoa/qnsview_tablet.mm (L63)
- see https://source.chromium.org/chromium/chromium/src/+/main:components/input/web_input_event_builders_mac.mm;drc=0af5ffa1e4cc4cc4f818725f8fee93ec57855e4b;l=421
This commit is contained in:
Aki
2025-01-30 12:32:16 +08:00
committed by Sam Lantinga
parent 31364477f2
commit 943579a545
2 changed files with 11 additions and 1 deletions
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src/video/cocoa/SDL_cocoapen.m
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@@ -135,7 +135,7 @@ static void Cocoa_HandlePenPointEvent(SDL_CocoaWindowData *_data, NSEvent *event
SDL_SendPenAxis(timestamp, pen, window, SDL_PEN_AXIS_PRESSURE, [event pressure]);
SDL_SendPenAxis(timestamp, pen, window, SDL_PEN_AXIS_ROTATION, [event rotation]);
SDL_SendPenAxis(timestamp, pen, window, SDL_PEN_AXIS_XTILT, ((float) tilt.x) * 90.0f);
SDL_SendPenAxis(timestamp, pen, window, SDL_PEN_AXIS_YTILT, ((float) tilt.y) * 90.0f);
SDL_SendPenAxis(timestamp, pen, window, SDL_PEN_AXIS_YTILT, ((float) -tilt.y) * 90.0f);
SDL_SendPenAxis(timestamp, pen, window, SDL_PEN_AXIS_TANGENTIAL_PRESSURE, event.tangentialPressure);
}