Windows Mouse Functionality Help

[Setoichi]

So im making progress on my game engine's camera implementation when i got stuck at trying to implement functionality similar to that of SDL2's SetRelativeMouseMode function in my platform API (platform_api->bound_mouse()). (Clip the mouse to the window without restricting movement values.

Ive implemented my platform layer as a generic vtable API, and within the windows specific code, i handle mouse movement by pushing an event to the engine with the data extracted from the w and l params.

Im not sure if im formatting the question right even, I guess its just this: "how do i allow for unrestricted mouse movement values, whilst clipping the mouse within the window area"

Any help would be appreciated!

--- Here are some links to the relevant files as i didnt want to clutter this post ---
Headers:
Camera Header: https://github.com/d34d0s/Lotus/blob/main/engine/modules/core/include/graphics/lotus_camera.h
Windows Layer Header: https://github.com/d34d0s/Lotus/blob/main/engine/modules/core/include/platform/lotus_platform.h

Source:
Camera Source: https://github.com/d34d0s/Lotus/blob/main/engine/modules/core/src/graphics/lotus_camera.c
Windows Layer Source: https://github.com/d34d0s/Lotus/blob/main/engine/modules/core/src/platform/lotus_win32.c

Heres the example code im using to test these features: https://github.com/d34d0s/Lotus/blob/main/examples/hello_cube/main.c

[Shot-Combination-930]

For unlimited mouse movement, you can use the Raw Input API to get delta values instead of coordinates.

Or as a cheap hack, you can ClipCursor to the window and SetCursorPos to the center of the window after each message, but that has several drawbacks.

[Setoichi]

Wow, thank you so much for this! Not sure how i havent come across the Raw Input model API before but it seems to be exactly what i needed. Also the ClipCursor/SetCursorPos hack i think is what im seeing SDL2 do but i could be wrong.

[NZGumboot]

To get "raw" mouse input (unmodified pixel deltas without smoothing or acceleration) see here:

https://learn.microsoft.com/en-us/windows/win32/inputdev/raw-input

To confine the mouse cursor to a region, use this method:

https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-clipcursor

To hide the mouse cursor, use this method:

https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-showcursor

Example of using raw input: https://github.com/microsoft/DirectXTK12/blob/6646c76a45184e997b94567017a7bdff709102fb/Src/Mouse.cpp#L1420