From bf3772d68ab6f15bf9170ba363e5264d8623631c Mon Sep 17 00:00:00 2001
From: enricoturri1966 <enricoturri@seznam.cz>
Date: Thu, 9 Nov 2023 09:55:37 +0100
Subject: [PATCH] #11617 - Fixed calculation of camera's tight frustrum around
 box (SPE-2023)

---
 src/slic3r/GUI/Camera.cpp | 11 ++---------
 1 file changed, 2 insertions(+), 9 deletions(-)

diff --git a/src/slic3r/GUI/Camera.cpp b/src/slic3r/GUI/Camera.cpp
index 789b0f1564..62ce8ea3ac 100644
--- a/src/slic3r/GUI/Camera.cpp
+++ b/src/slic3r/GUI/Camera.cpp
@@ -373,6 +373,8 @@ std::pair<double, double> Camera::calc_tight_frustrum_zs_around(const BoundingBo
     std::pair<double, double> ret;
     auto& [near_z, far_z] = ret;
 
+    set_distance(DefaultDistance);
+
     // box in eye space
     const BoundingBoxf3 eye_box = box.transformed(m_view_matrix);
     near_z = -eye_box.max.z();
@@ -396,15 +398,6 @@ std::pair<double, double> Camera::calc_tight_frustrum_zs_around(const BoundingBo
         near_z += delta;
         far_z += delta;
     }
-// The following is commented out because it causes flickering of the 3D scene GUI
-// when the bounding box of the scene gets large enough
-// We need to introduce some smarter code to move the camera back and forth in such case
-//    else if (near_z > 2.0 * FrustrumMinNearZ && m_distance > DefaultDistance) {
-//        float delta = m_distance - DefaultDistance;
-//        set_distance(DefaultDistance);
-//        near_z -= delta;
-//        far_z -= delta;
-//    }
 
     return ret;
 }