Unity Editor Scene Camera FPS Improver

NGSceneCameraWindow.cs

// /!\ Save this script in an Editor folder /!\
// Open the window at Tools/NG Scene Camera to enable & configure the speeds.
// Use the Scroll Wheel to change speed on the fly.
// Press Ctrl to use the sub-speed.
// Use Ctrl + Scroll Wheel to change the sub-speed.
// Tested with : Unity 2019.1

using System;
using System.Collections.Generic;
using System.Reflection;
using UnityEditor;
using UnityEngine;

namespace NGToolsEditor
{
	[InitializeOnLoad]
	public class NGSceneCameraWindow : EditorWindow
	{
		public const string	Title = "NG Scene Camera";

		private static FieldInfo	s_FlySpeed;

		private int						currentSpeed;
		private List<float>				speed;
		private int						currentSubSpeed;
		private List<float>				subSpeed;

		private GUIStyle	rightToLeftLabel;
		private Vector2		scrollPosition;

		static	NGSceneCameraWindow()
		{
			Type	SceneViewMotion = typeof(Editor).Assembly.GetType("UnityEditor.SceneViewMotion");

			if (SceneViewMotion != null)
			{
#if UNITY_2019_1_OR_NEWER
				NGSceneCameraWindow.s_FlySpeed = SceneViewMotion.GetField("s_FlySpeedTarget", BindingFlags.NonPublic | BindingFlags.Static);
#else
				NGSceneCameraWindow.s_FlySpeed = SceneViewMotion.GetField("s_FlySpeed", BindingFlags.NonPublic | BindingFlags.Static);
#endif
			}
		}

		[MenuItem("Tools/" + NGSceneCameraWindow.Title)]
		public static void	Open()
		{
			EditorWindow.GetWindow<NGSceneCameraWindow>(NGSceneCameraWindow.Title);
		}

		protected virtual void	OnEnable()
		{
			if (NGSceneCameraWindow.s_FlySpeed != null)
			{
				int	n = EditorPrefs.GetInt(NGSceneCameraWindow.Title + ".speed", -1);
				if (n > 0)
				{
					this.speed = new List<float>(n);

					for (int i = 0; i < n; i++)
						this.speed.Add(EditorPrefs.GetFloat(NGSceneCameraWindow.Title + ".speed." + i));
				}

				if (this.speed == null || this.speed.Count == 0)
					this.speed = new List<float>() { 5F, 10F, 20F, 40F, 100F };

				this.currentSpeed = Mathf.Clamp(this.currentSpeed, 0, this.speed.Count - 1);

				n = EditorPrefs.GetInt(NGSceneCameraWindow.Title + ".subSpeed", -1);
				if (n > 0)
				{
					this.subSpeed = new List<float>(n);

					for (int i = 0; i < n; i++)
						this.subSpeed.Add(EditorPrefs.GetFloat(NGSceneCameraWindow.Title + ".subSpeed." + i));
				}

				if (this.subSpeed == null || this.subSpeed.Count == 0)
					this.subSpeed = new List<float>() { .1F, .5F, 1F, 3F };

				this.currentSubSpeed = Mathf.Clamp(this.currentSubSpeed, 0, this.subSpeed.Count - 1);

#if UNITY_2019_1_OR_NEWER
				SceneView.duringSceneGui += this.OnSceneDelegate;
#else
				SceneView.onSceneGUIDelegate += this.OnSceneDelegate;
#endif
			}
		}

		protected virtual void	OnDestroy()
		{
			if (NGSceneCameraWindow.s_FlySpeed != null)
			{
#if UNITY_2019_1_OR_NEWER
				SceneView.duringSceneGui -= this.OnSceneDelegate;
#else
				SceneView.onSceneGUIDelegate -= this.OnSceneDelegate;
#endif

				EditorPrefs.SetInt(NGSceneCameraWindow.Title + ".speed", this.speed.Count);
				for (int i = 0; i < this.speed.Count; i++)
					EditorPrefs.SetFloat(NGSceneCameraWindow.Title + ".speed." + i, this.speed[i]);

				EditorPrefs.SetInt(NGSceneCameraWindow.Title + ".subSpeed", this.subSpeed.Count);
				for (int i = 0; i < this.subSpeed.Count; i++)
					EditorPrefs.SetFloat(NGSceneCameraWindow.Title + ".subSpeed." + i, this.subSpeed[i]);
			}
		}

		protected virtual void	OnGUI()
		{
			this.scrollPosition = EditorGUILayout.BeginScrollView(this.scrollPosition);
			{
				this.DrawSpeedList("Speed", this.speed);
				this.DrawSpeedList("Sub Speed", this.subSpeed);
			}
			EditorGUILayout.EndScrollView();
		}

		private void	DrawSpeedList(string label, List<float> list)
		{
			for (int i = 0; i < list.Count; i++)
			{
				EditorGUILayout.BeginHorizontal();
				{
					list[i] = EditorGUILayout.FloatField(label + " " + (i + 1), list[i]);

					if (list.Count > 1 && GUILayout.Button("X", GUILayout.Width(30F)) == true)
					{
						list.RemoveAt(i);
						return;
					}
				}
				EditorGUILayout.EndHorizontal();
			}

			EditorGUILayout.BeginHorizontal();
			{
				GUILayout.FlexibleSpace();

				if (GUILayout.Button("Add " + label, GUILayout.Width(100F)) == true)
					list.Add(0F);
			}
			EditorGUILayout.EndHorizontal();
		}

		private void	OnSceneDelegate(SceneView sceneView)
		{
			if (this.rightToLeftLabel == null)
			{
				this.rightToLeftLabel = new GUIStyle(GUI.skin.label);
				this.rightToLeftLabel.alignment = TextAnchor.MiddleRight;
			}

			Handles.BeginGUI();
			{
				Rect	r = sceneView.position;

				r.x = r.width - 150F + 50F; // Hide text field.
				r.y = 120F;
				r.width = 150F;
				r.height = 20F;

				if (Event.current.type == EventType.Repaint && Event.current.control == false && Tools.viewTool == ViewTool.FPS)
				{
					Rect	r2 = r;
					r2.xMax -= 55F;
					r2.yMin += 4F;
					r2.yMax -= 6F;
					EditorGUI.DrawRect(r2, Color.cyan);
				}

				this.currentSpeed = (int)EditorGUI.Slider(r, this.currentSpeed, 0, this.speed.Count - 1);
				r.x -= r.width;
				GUI.Label(r, this.speed[this.currentSpeed].ToString(), this.rightToLeftLabel);
				r.x += r.width;

				r.y += r.height;

				if (Event.current.type == EventType.Repaint && Event.current.control == true && Tools.viewTool == ViewTool.FPS)
				{
					Rect	r2 = r;
					r2.xMax -= 55F;
					r2.yMin += 4F;
					r2.yMax -= 6F;
					EditorGUI.DrawRect(r2, Color.cyan);
				}

				this.currentSubSpeed = EditorGUI.IntSlider(r, this.currentSubSpeed, 0, this.subSpeed.Count - 1);

				r.x -= r.width;
				GUI.Label(r, this.subSpeed[this.currentSubSpeed].ToString(), this.rightToLeftLabel);
			}
			Handles.EndGUI();

			if (Tools.viewTool == ViewTool.FPS)
			{
				if (Event.current.type == EventType.KeyDown)
				{
					if (Event.current.keyCode == KeyCode.LeftControl ||
						Event.current.keyCode == KeyCode.RightControl)
					{
						Event.current.Use();
					}
				}
				else if (Event.current.type == EventType.ScrollWheel)
				{
					if (Event.current.control == false)
						this.currentSpeed = Mathf.Clamp(this.currentSpeed + (Event.current.delta.y < 0F ? 1 : -1), 0, this.speed.Count - 1);
					else
						this.currentSubSpeed = Mathf.Clamp(this.currentSubSpeed + (Event.current.delta.y < 0F ? 1 : -1), 0, this.subSpeed.Count - 1);
					
					Event.current.Use();
				}

				if (Event.current.control == false)
					NGSceneCameraWindow.s_FlySpeed.SetValue(null, this.speed[this.currentSpeed]);
				else
					NGSceneCameraWindow.s_FlySpeed.SetValue(null, this.subSpeed[this.currentSubSpeed]);
			}
		}
	}
}

Amazing script!
CTRL button as modifier is not the best one to use. By default CTRL+A selects all and CTRL+D duplicates ;) (strafing in scene view)
I was missing this functionality badly when jumping back and forth between UE4 and Unity.
Thanks!

Amazing script!
CTRL button as modifier is not the best one to use. By default CTRL+A selects all and CTRL+D duplicates ;) (strafing in scene view)
I was missing this functionality badly when jumping back and forth between UE4 and Unity.
Thanks!

Wow, I never noticed someone posted here, my bad!

What other control would you prefer?