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fix(input): mouse_dx/dy report no motion on the first frame or across a cursor-mode change

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The delta was this frame's position minus the last, and the last started at 0,0, so the
first frame reported the cursor's whole distance from the corner as motion. A cursor-mode
change did the same, switching between a locked cursor's virtual reticle and the real
cursor. Maroon Lake's camera adds mouse_dy to its pitch and came up pointing at the ground.

examples/library/input_mouse_rebase.ludic covers both cases, plus ordinary motion and
re-setting the mode already in force.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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Orkun ÇAKILKAYA 2026-09-14 15:35:26 +03:00
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bump: patch
type: fix
**`Input.mouse_dx` / `mouse_dy` no longer jump on the first frame or when the cursor mode changes.**
The delta was the position minus the previous frame's, and the previous position started at 0,0,
so the first frame reported the cursor's whole distance from the corner as motion, and switching
between a locked cursor's virtual reticle and the real cursor did the same. A camera that adds
`mouse_dy` to its pitch came up pointing at the ground with nobody touching the mouse. Both frames
now report no motion; every other frame is unchanged, windowed or headless, on macOS and Windows.