From fdbe35b6199ec3c43ae096ae3f5e965a72144d83 Mon Sep 17 00:00:00 2001
From: Arthur <arthur.tang@bambulab.com>
Date: Wed, 5 Jul 2023 20:29:51 +0800
Subject: [PATCH] ENH: add placeholder first_layer_center_no_wipe_tower

This placeholder can be used for smooth timelapse of i3 type printers.

Change-Id: I953a437a7733835d850812565ff5f31b83292912
---
 src/libslic3r/GCode.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/libslic3r/GCode.cpp b/src/libslic3r/GCode.cpp
index a05fa2344..e7238a58d 100644
--- a/src/libslic3r/GCode.cpp
+++ b/src/libslic3r/GCode.cpp
@@ -1790,6 +1790,14 @@ void GCode::_do_export(Print& print, GCodeOutputStream &file, ThumbnailsGenerato
         m_placeholder_parser.set("first_layer_print_min", new ConfigOptionFloats({bbox.min.x() - plate_offset.x(), bbox.min.y() - plate_offset.y()}));
         m_placeholder_parser.set("first_layer_print_max", new ConfigOptionFloats({bbox.max.x() - plate_offset.x(), bbox.max.y() - plate_offset.y()}));
         m_placeholder_parser.set("first_layer_print_size", new ConfigOptionFloats({ bbox.size().x(), bbox.size().y() }));
+        // get center without wipe tower
+        BoundingBoxf bbox_wo_wt;// bounding box without wipe tower
+        for (auto& objPtr : print.objects()) {
+            BBoxData data;
+            bbox_wo_wt.merge(unscaled(objPtr->get_first_layer_bbox(data.area, data.layer_height, data.name)));
+        }
+        auto center = bbox_wo_wt.center();
+        m_placeholder_parser.set("first_layer_center_no_wipe_tower", new ConfigOptionFloats(center.x(),center.y()));
     }
 
     {