Ability to change Mouse Scale

[AL2009man]

This PR adds a Mouse Sensitivity scaling system that will let you switch between Mouse Scaling setups.

You can choose between these Mouse Scalers:

• Classic (default)
• Raw
• Modern

To achieve this system, the entire Camera System is now centralized to enable Angle-based camera system. this helps prepares #295.

Modern uses camera_turn = mouse_change * sensitivity * secret_internal_number
the "secret_internal_number" will be a internal multiplier for the Mouse camera input, we'll use 0.022 as it's the same multiplier used in various id Tech and Source Engine-powered games. Modern will be more familiar for those who play Apex Legends or Counter-Strike 2, while also being more friendly towards Steam Input's Mouse Pixels to Gyro/FlickStick Angles.

Raw is the same as Modern, but without secret_internal_number. the scaling will behave very simialr to Red Faction's very own mouse scaling, but without using it.

Classic remains the same, and it'll be the default.

[Copilot]

Pull request overview

Adds a configurable mouse sensitivity scaling mode (Legacy / Standard / Raw) and routes non-legacy modes through a centralized “raw pixels → camera angles” path while keeping Legacy behavior intact.

Changes:

• Add mouse_scale setting (persisted via Alpine settings load/save) with 3 modes: Legacy, Standard (0.022 deg/pixel), Raw (no 0.022 multiplier).
• Hook mouse delta acquisition to capture raw deltas in non-legacy modes and prevent RF’s native sensitivity pipeline from double-applying scaling.
• Add UI toggle in the stock Controls panel and a ms_scale console command to switch modes at runtime.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
game_patch/misc/ui.cpp	Injects a new Controls-panel “Mouse scale” toggle and wires up render/click handling.
game_patch/misc/camera.cpp	Applies centralized mouse-camera deltas (non-legacy modes) and performs linear-pitch correction at the camera injection point.
game_patch/misc/alpine_settings.h	Adds the mouse_scale config field to AlpineGameSettings.
game_patch/misc/alpine_settings.cpp	Loads/saves MouseScale from/to the settings file.
game_patch/input/mouse.h	Declares mouse patch entrypoint and mouse_get_camera() API for camera integration.
game_patch/input/mouse.cpp	Captures raw deltas in non-legacy modes, implements mouse_get_camera(), and adds ms_scale console command.

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[Copilot]

Pull request overview

Adds configurable mouse camera scaling modes (Classic/Raw/Modern) and centralizes mouse-to-camera angle computation to support an angle-based camera pipeline (prep work for #295).

Changes:

• Introduces mouse_scale setting (ini + console command) and a new Controls-panel UI toggle to cycle scale modes.
• Hooks mouse delta retrieval to capture raw deltas for centralized camera angle computation in Raw/Modern modes.
• Moves/extends linear pitch correction into the camera patch point and integrates the new mouse scaling path there.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
game_patch/misc/ui.cpp	Adds a Controls-panel “Mouse scale” toggle and mouse handling/render integration.
game_patch/misc/camera.cpp	Centralizes mouse camera delta application + linear pitch correction at a camera injection point.
game_patch/misc/alpine_settings.h	Adds mouse_scale field to persisted game settings.
game_patch/misc/alpine_settings.cpp	Loads/saves MouseScale from the settings file.
game_patch/input/mouse.h	Declares centralized mouse camera delta API used by camera code.
game_patch/input/mouse.cpp	Captures raw mouse deltas in Raw/Modern, adds ms_scale command, and implements mouse_get_camera.
game_patch/CMakeLists.txt	Ensures the new mouse header is included in the build sources list.

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[Copilot]

Pull request overview

This PR introduces a mouse-sensitivity scaling system with three modes (Classic/Raw/Modern) by centralizing camera angle computation and wiring the new setting through UI, console, and config serialization.

Changes:

• Add mouse_scale setting (0/1/2) with load/save support (MouseScale) and a console command (ms_scale).
• Hook mouse delta acquisition to capture raw deltas in non-Classic modes and compute camera angle deltas with an id Tech/Source-style formula.
• Inject a new Controls-panel UI toggle to cycle mouse scale modes.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
game_patch/misc/ui.cpp	Adds an injected Controls-panel button to cycle mouse scale modes and renders/handles it.
game_patch/misc/camera.cpp	Moves/installs the combined “mouse camera scaling + linear pitch correction” injection and registers cl_linearpitch.
game_patch/misc/alpine_settings.h	Adds AlpineGameSettings::mouse_scale (0=Classic, 1=Raw, 2=Modern).
game_patch/misc/alpine_settings.cpp	Loads/saves MouseScale under [InputSettings].
game_patch/input/mouse.h	Declares mouse_get_camera() for centralized camera angle deltas.
game_patch/input/mouse.cpp	Hooks mouse_get_delta to capture raw deltas, adds ms_scale, and implements mouse_get_camera().
game_patch/CMakeLists.txt	Adds the new input/mouse.h header to the build sources list.

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[GooberRF]

@AL2009man I should be able to review this tomorrow. Can you please update CHANGELOG.md to add this feature.