From 1f0011173350c29715bbe58516cd4f9d77d7eb86 Mon Sep 17 00:00:00 2001
From: Sabriel-Koh <52443698+Sabriel-Koh@users.noreply.github.com>
Date: Tue, 10 Feb 2026 22:31:51 +0800
Subject: [PATCH] Fix: box selection selecting wrong object in orthogonal view
 (#12230)

# Description
When using box selection with the orthogonal view, unexpected objects end up getting selected.
Fixed by setting the selection camera to use the same view as the display camera.

Fixes #5895

# Screenshots/Recordings/Graphs
Bugged:

https://github.com/user-attachments/assets/e98fcbb1-0f01-43dd-a3d5-cb0af97e226e

Fixed:

https://github.com/user-attachments/assets/f84e801c-d595-4394-b42f-ed8758413980

## Tests
Tested the selection in both perspective and orthogonal.
---
 src/slic3r/GUI/GLCanvas3D.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/slic3r/GUI/GLCanvas3D.cpp b/src/slic3r/GUI/GLCanvas3D.cpp
index 91210b0786b..03b75e748f5 100644
--- a/src/slic3r/GUI/GLCanvas3D.cpp
+++ b/src/slic3r/GUI/GLCanvas3D.cpp
@@ -7308,6 +7308,7 @@ void GLCanvas3D::_rectangular_selection_picking_pass()
                 rect_near_top = rect_near_bottom + ratio_y;
 
             framebuffer_camera.look_at(camera->get_position(), camera->get_target(), camera->get_dir_up());
+            framebuffer_camera.set_type(camera->get_type());
             framebuffer_camera.apply_projection(rect_near_left, rect_near_right, rect_near_bottom, rect_near_top, camera->get_near_z(), camera->get_far_z());
             framebuffer_camera.set_viewport(0, 0, width, height);
             framebuffer_camera.apply_viewport();