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The 3D mouse's pan and zoom speeds were fixed guesses, and each sample was applied as it came, so the speed on screen depended on how often the driver sends samples -- different for every platform and device. Motion now goes through SpaceMouseMotion::map(), which scales each sample by the time since the previous one, and applies the user's settings from a new "Mouvement" section of Configuration > Souris 3D: pan and zoom speed, a dead zone, inverting each axis, and zooming by push/pull (as before) or by twisting the cap. The defaults keep the previous behaviour. Zoom is now exponential in the deflection, so the factor stays positive however hard the cap is pulled (1 + z/1000 went negative past z = -1000) and an equal push and pull cancel out. Sub- pixel pan is carried over between samples instead of being rounded away. The backend now reports all six axes. tst_spacemousemotion covers the mapping without a device and is built whether or not QET_ENABLE_SPACEMOUSE is on. The new behaviour was also checked end to end with tools/spnav-shim (qelectrotech-docker): twist with a dead zone of 10 ignores push/pull and small drift, and a twist of 60 gives the same frame as a push of 50 with the defaults. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>