From 03d629f0e1789ef7950219d7a264037b766f5af1 Mon Sep 17 00:00:00 2001
From: nothingTVatYT <rjakob13@googlemail.com>
Date: Mon, 27 Nov 2023 04:19:45 +0100
Subject: [PATCH] calculate follow selection on FOV and far plane

---
 Source/Editor/Viewport/Cameras/FPSCamera.cs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Source/Editor/Viewport/Cameras/FPSCamera.cs b/Source/Editor/Viewport/Cameras/FPSCamera.cs
index bf2e840ea..0bbcfd0e8 100644
--- a/Source/Editor/Viewport/Cameras/FPSCamera.cs
+++ b/Source/Editor/Viewport/Cameras/FPSCamera.cs
@@ -174,7 +174,10 @@ namespace FlaxEditor.Viewport.Cameras
             }
             else
             {
-                position = sphere.Center - Vector3.Forward * orientation * (sphere.Radius * 2.5f);
+                // calculate the min. distance so that the sphere fits roughly 70% in FOV
+                // clip to far plane as a disappearing big object might be confusing
+                var distance = Mathf.Min(1.4f * sphere.Radius / Mathf.Tan(Mathf.DegreesToRadians * Viewport.FieldOfView / 2), Viewport.FarPlane);
+                position = sphere.Center - Vector3.Forward * orientation * distance;
             }
             TargetPoint = sphere.Center;
             MoveViewport(position, orientation);