Nevo Engine

Include

#include <EngineExports.hpp>
#include <input/InputManager.hpp>
#include <input/KeycodeMap.hpp>

auto& input = Public::Engine::getInstance().GetInputManager();

API	Purpose
`UpdateKeyStates()`	Refresh keyboard state. Engine-owned in normal games.
`OnWindowFocus(bool)`	Notify focus changes.
`IsKeyDown(int/Key::Code)`	Held this frame.
`IsKeyUp(int/Key::Code)`	Not held this frame.
`GetKeyDown(int/Key::Code)`	Pressed this frame.
`UpdateMouseDelta()`	Refresh mouse movement delta.
`IsMouseButtonDown(int)`	Mouse button held.
`IsMouseButtonUp(int)`	Mouse button not held.
`GetMouseState()`	Read mouse position, delta, and buttons.
`SetMousePosition(x, y)`	Move the cursor.
`LockCursor()`	Hide/lock cursor for free look.
`UnlockCursor()`	Release cursor.
`HideCursor()`	Hide cursor without locking.
`ShowCursor()`	Show cursor.
`IsCursorLocked()`	Query cursor lock.
`IsWindowFocused()`	Query focus.
`Update()`	Full input update. Engine-owned in normal games.

struct MouseState {
    int x = 0;
    int y = 0;
    int deltaX = 0;
    int deltaY = 0;
    bool buttons[8] = {false};
};

KeycodeMap.hpp defines Public::Input::Key::Code:

if (input.GetKeyDown(Public::Input::Key::Code::Space)) {
    Jump();
}

It also defines wrapper constants in Public::Input::Key:

using namespace Public::Input::Key;

if (input.IsKeyDown(W)) {
    MoveForward();
}

Available groups:

Check focus before responding to gameplay controls that should not run while the window is inactive:

if (!input.IsWindowFocused()) {
    return;
}

The sample Freecam system combines IsWindowFocused() with cursor lock to avoid accidental camera movement while interacting with other windows.