From 06d483ee462f6b1a7a3f39805c81ac0b6f0dfcca Mon Sep 17 00:00:00 2001
From: "lane.wei" <lane.wei@bambulab.com>
Date: Sat, 11 Jan 2025 16:34:12 +0800
Subject: [PATCH] ENH: using shared area for fillbeds when obj is small

when obj is small, it uses the full build volume to compute the empty cell
we need to use the shared one
jira: STUDIO-9583

Change-Id: I4cc183df38e054a7b94579637a49168c2fb77992
(cherry picked from commit fea423cdad4ee1a24c077cfeed99962e89953d5b)
---
 src/libslic3r/PrintConfig.cpp |  2 +-
 src/libslic3r/PrintConfig.hpp |  1 +
 src/slic3r/GUI/PartPlate.cpp  | 26 ++++++++++++++++++++++++++
 src/slic3r/GUI/PartPlate.hpp  | 15 +--------------
 src/slic3r/GUI/Plater.cpp     |  2 +-
 5 files changed, 30 insertions(+), 16 deletions(-)

diff --git a/src/libslic3r/PrintConfig.cpp b/src/libslic3r/PrintConfig.cpp
index 54e4815a6..842e27eac 100644
--- a/src/libslic3r/PrintConfig.cpp
+++ b/src/libslic3r/PrintConfig.cpp
@@ -7590,7 +7590,7 @@ static Points to_points(const std::vector<Vec2d> &dpts)
     return pts;
 }
 
-static Polygon get_shared_poly(const std::vector<Pointfs>& extruder_polys)
+Polygon get_shared_poly(const std::vector<Pointfs>& extruder_polys)
 {
     Polygon result;
     for (int index = 0; index < extruder_polys.size(); index++)
diff --git a/src/libslic3r/PrintConfig.hpp b/src/libslic3r/PrintConfig.hpp
index 664b58232..2e2d36d56 100644
--- a/src/libslic3r/PrintConfig.hpp
+++ b/src/libslic3r/PrintConfig.hpp
@@ -1529,6 +1529,7 @@ private:
     static PrintAndCLIConfigDef s_def;
 };
 
+Polygon get_shared_poly(const std::vector<Pointfs>& extruder_polys);
 Points get_bed_shape(const DynamicPrintConfig &cfg, bool use_share = true);
 Points get_bed_shape(const PrintConfig &cfg, bool use_share = false);
 Points get_bed_shape(const SLAPrinterConfig &cfg);
diff --git a/src/slic3r/GUI/PartPlate.cpp b/src/slic3r/GUI/PartPlate.cpp
index 2d1898f69..a13934d4a 100644
--- a/src/slic3r/GUI/PartPlate.cpp
+++ b/src/slic3r/GUI/PartPlate.cpp
@@ -2479,6 +2479,32 @@ const BoundingBox PartPlate::get_bounding_box_crd()
 	return plate_shape.bounding_box();
 }
 
+BoundingBoxf3 PartPlate::get_build_volume(bool use_share)
+{
+    auto  eps=Slic3r::BuildVolume::SceneEpsilon;
+	Vec3d up_point;
+	Vec3d low_point;
+	if (use_share && !m_extruder_areas.empty()) {
+		Polygon bed_poly = get_shared_poly(m_extruder_areas);
+		BoundingBox bbox = bed_poly.bounding_box();
+
+		up_point = Vec3d(unscale_(bbox.max.x()) + eps,  unscale_(bbox.max.y()) + eps, m_origin.z() + m_height + eps);
+		low_point = Vec3d(unscale_(bbox.min.x()) - eps, unscale_(bbox.min.y()) - eps, m_origin.z() - eps);
+	}
+	else {
+		up_point = Vec3d(m_origin.x() + m_width + eps, m_origin.y() + m_depth + eps, m_origin.z() + m_height + eps);
+		low_point = Vec3d(m_origin.x() - eps, m_origin.y() - eps, m_origin.z() - eps);
+		if (m_raw_shape.size() > 0) {
+			up_point.x() += m_raw_shape[0].x();
+			up_point.y() += m_raw_shape[0].y();
+			low_point.x() += m_raw_shape[0].x();
+			low_point.y() += m_raw_shape[0].y();
+		}
+	}
+    BoundingBoxf3 plate_box(low_point, up_point);
+    return plate_box;
+}
+
 bool PartPlate::contains(const Vec3d& point) const
 {
 	return m_bounding_box.contains(point);
diff --git a/src/slic3r/GUI/PartPlate.hpp b/src/slic3r/GUI/PartPlate.hpp
index 7f6162b03..b8c490adb 100644
--- a/src/slic3r/GUI/PartPlate.hpp
+++ b/src/slic3r/GUI/PartPlate.hpp
@@ -383,20 +383,7 @@ public:
     const BoundingBoxf3& get_bounding_box(bool extended = false) { return extended ? m_extended_bounding_box : m_bounding_box; }
     const BoundingBox get_bounding_box_crd();
     BoundingBoxf3 get_plate_box() {return get_build_volume();}
-    BoundingBoxf3 get_build_volume()
-    {
-        auto  eps=Slic3r::BuildVolume::SceneEpsilon;
-        Vec3d up_point = Vec3d(m_origin.x() + m_width + eps, m_origin.y() + m_depth + eps, m_origin.z() + m_height + eps);
-        Vec3d low_point  = Vec3d(m_origin.x() - eps, m_origin.y() - eps, m_origin.z() - eps);
-        if (m_raw_shape.size() > 0) {
-            up_point.x() += m_raw_shape[0].x();
-            up_point.y() += m_raw_shape[0].y();
-            low_point.x() += m_raw_shape[0].x();
-            low_point.y() += m_raw_shape[0].y();
-        }
-        BoundingBoxf3 plate_box(low_point, up_point);
-        return plate_box;
-    }
+    BoundingBoxf3 get_build_volume(bool use_share = false);
 
     const std::vector<BoundingBoxf3>& get_exclude_areas() { return m_exclude_bounding_box; }
 
diff --git a/src/slic3r/GUI/Plater.cpp b/src/slic3r/GUI/Plater.cpp
index 50bc133fb..4fafe0868 100644
--- a/src/slic3r/GUI/Plater.cpp
+++ b/src/slic3r/GUI/Plater.cpp
@@ -15052,7 +15052,7 @@ void Plater::clone_selection()
 std::vector<Vec2f> Plater::get_empty_cells(const Vec2f step)
 {
     PartPlate* plate = wxGetApp().plater()->get_partplate_list().get_curr_plate();
-    BoundingBoxf3 build_volume = plate->get_build_volume();
+    BoundingBoxf3 build_volume = plate->get_build_volume(true);
     Vec2d vmin(build_volume.min.x(), build_volume.min.y()), vmax(build_volume.max.x(), build_volume.max.y());
     BoundingBoxf bbox(vmin, vmax);
     std::vector<Vec2f> cells;