From 9950662ddf012e6a95ba3ef56f8a50b5c04a631e 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 91210b0786..03b75e748f 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();