[Unity] fps 로그창 GUI

OnGUI에서 매 프레임마다 띄워준다

Application.targetFrameRate 로 현재 목표 fps를 불러오거나 지정할 수 있다

public class FPSDisplay : MonoBehaviour
{
    public bool toggle = false;
    private GUIStyle style;
    private Rect rect;
    private float deltaTime = 0.0f;
    const float updateInterval = 0.5f;
    private int frames = 0;
    private float fps = 0.0f;
    private float timeLeft;
    private int curFrame;

    void Awake()
    {
        int w = Screen.width, h = Screen.height;
        style = new GUIStyle();
        
        rect = new Rect(10, 10, w, h * 2 / 100);
        style.alignment = TextAnchor.UpperLeft;
        style.fontSize = h * 2 / 50;
        style.normal.textColor = Color.green;
    }

    // fps 
    void Update()
    {
        timeLeft -= Time.deltaTime;
        frames++;

        // Update FPS display every updateInterval seconds
        if (timeLeft <= 0.0f)
        {
            fps = frames / updateInterval;
            frames = 0;
            timeLeft = updateInterval;
        }
    }

    void OnGUI()
    {
        if (!toggle)
            return;

        string text = string.Format("{0:0.} FPS", fps);
        GUI.Label(rect, text, style);
    }
}