Shared data for SLA gizmos have been removed from GLGizmoBase

This commit introduces no functional changes, only code-shuffling

8 files changed, 213 insertions, 200 deletions

diff --git a/src/slic3r/GUI/Gizmos/GLGizmoBase.cpp b/src/slic3r/GUI/Gizmos/GLGizmoBase.cpp
index fc644f5ca..2f988db12 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoBase.cpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoBase.cpp
@@ -5,10 +5,6 @@
 
 #include "slic3r/GUI/GUI_App.hpp"
 #include "slic3r/GUI/GLCanvas3D.hpp"
-#include "libslic3r/SLAPrint.hpp"
-#include "slic3r/GUI/MeshUtils.hpp"
-
-
 
 
 
@@ -138,7 +134,7 @@ void GLGizmoBase::Grabber::render_face(float half_size) const
 }
 
 
-GLGizmoBase::GLGizmoBase(GLCanvas3D& parent, const std::string& icon_filename, unsigned int sprite_id, CommonGizmosData* common_data_ptr)
+GLGizmoBase::GLGizmoBase(GLCanvas3D& parent, const std::string& icon_filename, unsigned int sprite_id)
     : m_parent(parent)
     , m_group_id(-1)
     , m_state(Off)
@@ -149,7 +145,6 @@ GLGizmoBase::GLGizmoBase(GLCanvas3D& parent, const std::string& icon_filename, u
     , m_dragging(false)
     , m_imgui(wxGetApp().imgui())
     , m_first_input_window_render(true)
-    , m_c(common_data_ptr)
 {
     ::memcpy((void*)m_base_color, (const void*)DEFAULT_BASE_COLOR, 4 * sizeof(float));
     ::memcpy((void*)m_drag_color, (const void*)DEFAULT_DRAG_COLOR, 4 * sizeof(float));
@@ -306,119 +301,5 @@ unsigned char picking_checksum_alpha_channel(unsigned char red, unsigned char gr
 }
 
 
-
-bool CommonGizmosData::update_from_backend(GLCanvas3D& canvas, ModelObject* model_object)
-{
-    recent_update = false;
-    bool object_changed = false;
-
-    if (m_model_object != model_object
-    || (model_object && m_model_object_id != model_object->id())) {
-        m_model_object = model_object;
-        m_print_object_idx = -1;
-        m_mesh_raycaster.reset();
-        m_object_clipper.reset();
-        m_supports_clipper.reset();
-        m_old_mesh = nullptr;
-        m_mesh = nullptr;
-        m_backend_mesh_transformed.clear();
-
-        object_changed = true;
-        recent_update = true;
-    }
-
-    if (m_model_object) {
-        int active_inst = canvas.get_selection().get_instance_idx();
-        if (m_active_instance != active_inst) {
-            m_active_instance = active_inst;
-            m_active_instance_bb_radius = m_model_object->instance_bounding_box(m_active_instance).radius();
-            recent_update = true;
-        }
-    }
-
-
-    if (! m_model_object || ! canvas.get_selection().is_from_single_instance())
-        return false;
-
-    int old_po_idx = m_print_object_idx;
-
-    // First we need a pointer to the respective SLAPrintObject. The index into objects vector is
-    // cached so we don't have todo it on each render. We only search for the po if needed:
-    if (m_print_object_idx < 0 || (int)canvas.sla_print()->objects().size() != m_print_objects_count) {
-        m_print_objects_count = canvas.sla_print()->objects().size();
-        m_print_object_idx = -1;
-        for (const SLAPrintObject* po : canvas.sla_print()->objects()) {
-            ++m_print_object_idx;
-            if (po->model_object()->id() == m_model_object->id())
-                break;
-        }
-    }
-
-    bool mesh_exchanged = false;
-    m_mesh = nullptr;
-    // Load either the model_object mesh, or one provided by the backend
-    // This mesh does not account for the possible Z up SLA offset.
-    // The backend mesh needs to be transformed and because a pointer to it is
-    // saved, a copy is stored as a member (FIXME)
-    if (m_print_object_idx >=0) {
-        const SLAPrintObject* po = canvas.sla_print()->objects()[m_print_object_idx];
-        if (po->is_step_done(slaposDrillHoles)) {
-            m_backend_mesh_transformed = po->get_mesh_to_print();
-            m_backend_mesh_transformed.transform(canvas.sla_print()->sla_trafo(*m_model_object).inverse());
-            m_mesh = &m_backend_mesh_transformed;
-            m_has_drilled_mesh = true;
-            mesh_exchanged = true;
-        }
-    }
-
-    if (! m_mesh) {
-        m_mesh = &m_model_object->volumes.front()->mesh();
-        m_backend_mesh_transformed.clear();
-        m_has_drilled_mesh = false;
-    }
-
-    m_model_object_id = m_model_object->id();
-
-    if (m_mesh != m_old_mesh) {
-        // Update clipping plane position.
-        float new_clp_pos = m_clipping_plane_distance;
-        if (object_changed) {
-            new_clp_pos = 0.f;
-            m_clipping_plane_was_moved = false;
-        } else {
-            // After we got a drilled mesh, move the cp to 25% (if not used already)
-            if (m_clipping_plane_distance == 0.f && mesh_exchanged && m_has_drilled_mesh) {
-                new_clp_pos = 0.25f;
-                m_clipping_plane_was_moved = false; // so it uses current camera direction
-            }
-        }
-        m_clipping_plane_distance = new_clp_pos;
-        m_clipping_plane_distance_stash = new_clp_pos;
-
-        m_schedule_aabb_calculation = true;
-        recent_update = true;
-        return true;
-    }
-    if (! recent_update)
-        recent_update = m_print_object_idx < 0 && old_po_idx >= 0;
-
-    return recent_update;
-}
-
-
-void CommonGizmosData::build_AABB_if_needed()
-{
-    if (! m_schedule_aabb_calculation)
-        return;
-
-    wxBusyCursor wait;
-    m_mesh_raycaster.reset(new MeshRaycaster(*m_mesh));
-    m_object_clipper.reset();
-    m_supports_clipper.reset();
-    m_old_mesh = m_mesh;
-    m_schedule_aabb_calculation = false;
-}
-
-
 } // namespace GUI
 } // namespace Slic3r
diff --git a/src/slic3r/GUI/Gizmos/GLGizmoBase.hpp b/src/slic3r/GUI/Gizmos/GLGizmoBase.hpp
index 695946e3d..5f159420f 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoBase.hpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoBase.hpp
@@ -30,7 +30,6 @@ static const float CONSTRAINED_COLOR[4] = { 0.5f, 0.5f, 0.5f, 1.0f };
 
 
 class ImGuiWrapper;
-class CommonGizmosData;
 class GLCanvas3D;
 class ClippingPlane;
 
@@ -101,13 +100,11 @@ protected:
     mutable std::vector<Grabber> m_grabbers;
     ImGuiWrapper* m_imgui;
     bool m_first_input_window_render;
-    CommonGizmosData* m_c = nullptr;
 
 public:
     GLGizmoBase(GLCanvas3D& parent,
                 const std::string& icon_filename,
-                unsigned int sprite_id,
-                CommonGizmosData* common_data = nullptr);
+                unsigned int sprite_id);
     virtual ~GLGizmoBase() {}
 
     bool init() { return on_init(); }
@@ -185,63 +182,6 @@ protected:
 // were not interpolated by alpha blending or multi sampling.
 extern unsigned char picking_checksum_alpha_channel(unsigned char red, unsigned char green, unsigned char blue);
 
-class MeshRaycaster;
-class MeshClipper;
-
-class CommonGizmosData {
-public:
-    const TriangleMesh* mesh() const {
-        return (! m_mesh ? nullptr : m_mesh); //(m_cavity_mesh ? m_cavity_mesh.get() : m_mesh));
-    }
-
-    bool update_from_backend(GLCanvas3D& canvas, ModelObject* model_object);
-
-    bool recent_update = false;
-
-    static constexpr float HoleStickOutLength = 1.f;
-
-
-
-    ModelObject* m_model_object = nullptr;
-    const TriangleMesh* m_mesh;
-    std::unique_ptr<MeshRaycaster> m_mesh_raycaster;
-    std::unique_ptr<MeshClipper> m_object_clipper;
-    std::unique_ptr<MeshClipper> m_supports_clipper;
-
-    //std::unique_ptr<TriangleMesh> m_cavity_mesh;
-    //std::unique_ptr<GLVolume> m_volume_with_cavity;
-
-    int m_active_instance = -1;
-    float m_active_instance_bb_radius = 0;
-    ObjectID m_model_object_id = 0;
-    int m_print_object_idx = -1;
-    int m_print_objects_count = -1;
-    int m_old_timestamp = -1;
-
-    float m_clipping_plane_distance = 0.f;
-    std::unique_ptr<ClippingPlane> m_clipping_plane;
-    bool m_clipping_plane_was_moved = false;
-
-    void stash_clipping_plane() {
-        m_clipping_plane_distance_stash = m_clipping_plane_distance;
-    }
-
-    void unstash_clipping_plane() {
-        m_clipping_plane_distance = m_clipping_plane_distance_stash;
-    }
-
-    bool has_drilled_mesh() const { return m_has_drilled_mesh; }
-
-    void build_AABB_if_needed();
-
-private:
-    const TriangleMesh* m_old_mesh;
-    TriangleMesh m_backend_mesh_transformed;
-    float m_clipping_plane_distance_stash = 0.f;
-    bool m_has_drilled_mesh = false;
-    bool m_schedule_aabb_calculation = false;
-};
-
 } // namespace GUI
 } // namespace Slic3r
 
diff --git a/src/slic3r/GUI/Gizmos/GLGizmoHollow.cpp b/src/slic3r/GUI/Gizmos/GLGizmoHollow.cpp
index 43f83d11b..b97a6f4bc 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoHollow.cpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoHollow.cpp
@@ -17,11 +17,10 @@
 namespace Slic3r {
 namespace GUI {
 
-GLGizmoHollow::GLGizmoHollow(GLCanvas3D& parent, const std::string& icon_filename, unsigned int sprite_id, CommonGizmosData* cd)
-    : GLGizmoBase(parent, icon_filename, sprite_id, cd)
+GLGizmoHollow::GLGizmoHollow(GLCanvas3D& parent, const std::string& icon_filename, unsigned int sprite_id)
+    : GLGizmoBase(parent, icon_filename, sprite_id)
     , m_quadric(nullptr)
 {
-    m_c->m_clipping_plane.reset(new ClippingPlane(Vec3d::Zero(), 0.));
     m_quadric = ::gluNewQuadric();
     if (m_quadric != nullptr)
         // using GLU_FILL does not work when the instance's transformation
@@ -1147,6 +1146,13 @@ void GLGizmoHollow::update_clipping_plane(bool keep_normal) const
 }
 
 
+void GLGizmoHollow::on_set_hover_id()
+{
+    if (int(m_c->m_model_object->sla_drain_holes.size()) <= m_hover_id)
+        m_hover_id = -1;
+}
+
+
 
 
 } // namespace GUI
diff --git a/src/slic3r/GUI/Gizmos/GLGizmoHollow.hpp b/src/slic3r/GUI/Gizmos/GLGizmoHollow.hpp
index f3650c94d..bc4549a0e 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoHollow.hpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoHollow.hpp
@@ -16,6 +16,7 @@ namespace GUI {
 class ClippingPlane;
 class MeshClipper;
 class MeshRaycaster;
+class CommonGizmosData;
 enum class SLAGizmoEventType : unsigned char;
 
 class GLGizmoHollow : public GLGizmoBase
@@ -28,7 +29,7 @@ private:
 
 
 public:
-    GLGizmoHollow(GLCanvas3D& parent, const std::string& icon_filename, unsigned int sprite_id, CommonGizmosData* cd);
+    GLGizmoHollow(GLCanvas3D& parent, const std::string& icon_filename, unsigned int sprite_id);
     ~GLGizmoHollow() override;
     void set_sla_support_data(ModelObject* model_object, const Selection& selection);
     bool gizmo_event(SLAGizmoEventType action, const Vec2d& mouse_position, bool shift_down, bool alt_down, bool control_down);
@@ -42,6 +43,7 @@ public:
 
     bool is_selection_rectangle_dragging() const { return m_selection_rectangle.is_dragging(); }
     void update_clipping_plane(bool keep_normal = false) const;
+    void set_common_data_ptr(CommonGizmosData* ptr) { m_c = ptr; }
 
 private:
     bool on_init() override;
@@ -72,6 +74,8 @@ private:
 
     sla::DrainHoles m_holes_stash;
 
+    CommonGizmosData* m_c = nullptr;
+
     //std::unique_ptr<ClippingPlane> m_clipping_plane;
     
     // This map holds all translated description texts, so they can be easily referenced during layout calculations
@@ -99,12 +103,7 @@ private:
 
 protected:
     void on_set_state() override;
-    void on_set_hover_id() override
-
-    {
-        if (int(m_c->m_model_object->sla_drain_holes.size()) <= m_hover_id)
-            m_hover_id = -1;
-    }
+    void on_set_hover_id() override;
     void on_start_dragging() override;
     void on_stop_dragging() override;
     void on_render_input_window(float x, float y, float bottom_limit) override;
diff --git a/src/slic3r/GUI/Gizmos/GLGizmoSlaSupports.cpp b/src/slic3r/GUI/Gizmos/GLGizmoSlaSupports.cpp
index 5236407d1..368dac037 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoSlaSupports.cpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoSlaSupports.cpp
@@ -22,12 +22,11 @@
 namespace Slic3r {
 namespace GUI {
 
-GLGizmoSlaSupports::GLGizmoSlaSupports(GLCanvas3D& parent, const std::string& icon_filename, unsigned int sprite_id, CommonGizmosData* cd)
-    : GLGizmoBase(parent, icon_filename, sprite_id, cd)
+GLGizmoSlaSupports::GLGizmoSlaSupports(GLCanvas3D& parent, const std::string& icon_filename, unsigned int sprite_id)
+    : GLGizmoBase(parent, icon_filename, sprite_id)
     , m_quadric(nullptr)
     , m_its(nullptr)
-{
-    m_c->m_clipping_plane.reset(new ClippingPlane(Vec3d::Zero(), 0.));
+{    
     m_quadric = ::gluNewQuadric();
     if (m_quadric != nullptr)
         // using GLU_FILL does not work when the instance's transformation
diff --git a/src/slic3r/GUI/Gizmos/GLGizmoSlaSupports.hpp b/src/slic3r/GUI/Gizmos/GLGizmoSlaSupports.hpp
index a2da5e506..deddabe5f 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoSlaSupports.hpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoSlaSupports.hpp
@@ -16,6 +16,7 @@ namespace GUI {
 class ClippingPlane;
 class MeshClipper;
 class MeshRaycaster;
+class CommonGizmosData;
 enum class SLAGizmoEventType : unsigned char;
 
 class GLGizmoSlaSupports : public GLGizmoBase
@@ -69,7 +70,7 @@ private:
     };
 
 public:
-    GLGizmoSlaSupports(GLCanvas3D& parent, const std::string& icon_filename, unsigned int sprite_id, CommonGizmosData* cd);
+    GLGizmoSlaSupports(GLCanvas3D& parent, const std::string& icon_filename, unsigned int sprite_id);
     ~GLGizmoSlaSupports() override;
     void set_sla_support_data(ModelObject* model_object, const Selection& selection);
     bool gizmo_event(SLAGizmoEventType action, const Vec2d& mouse_position, bool shift_down, bool alt_down, bool control_down);
@@ -81,6 +82,7 @@ public:
     bool has_backend_supports() const;
     void reslice_SLA_supports(bool postpone_error_messages = false) const;
     void update_clipping_plane(bool keep_normal = false) const;
+    void set_common_data_ptr(CommonGizmosData* ptr) { m_c = ptr; }
 
 private:
     bool on_init() override;
@@ -116,6 +118,8 @@ private:
     bool m_selection_empty = true;
     EState m_old_state = Off; // to be able to see that the gizmo has just been closed (see on_set_state)
 
+    CommonGizmosData* m_c = nullptr;
+
     //mutable std::unique_ptr<MeshClipper> m_object_clipper;
     //mutable std::unique_ptr<MeshClipper> m_supports_clipper;
 
diff --git a/src/slic3r/GUI/Gizmos/GLGizmosManager.cpp b/src/slic3r/GUI/Gizmos/GLGizmosManager.cpp
index 91735d986..8be642922 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmosManager.cpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmosManager.cpp
@@ -6,6 +6,8 @@
 #include "slic3r/GUI/GUI_ObjectManipulation.hpp"
 #include "slic3r/GUI/PresetBundle.hpp"
 #include "slic3r/Utils/UndoRedo.hpp"
+#include "libslic3r/SLAPrint.hpp"
+#include "slic3r/GUI/MeshUtils.hpp"
 
 #include <GL/glew.h>
 #include <wx/glcanvas.h>
@@ -83,16 +85,18 @@ bool GLGizmosManager::init()
             return false;
     }
 
-    m_common_gizmos_data.reset(new CommonGizmosData());
-
     // Order of gizmos in the vector must match order in EType!
     m_gizmos.emplace_back(new GLGizmoMove3D(m_parent, "move.svg", 0));
     m_gizmos.emplace_back(new GLGizmoScale3D(m_parent, "scale.svg", 1));
     m_gizmos.emplace_back(new GLGizmoRotate3D(m_parent, "rotate.svg", 2));
     m_gizmos.emplace_back(new GLGizmoFlatten(m_parent, "place.svg", 3));
     m_gizmos.emplace_back(new GLGizmoCut(m_parent, "cut.svg", 4));
-    m_gizmos.emplace_back(new GLGizmoHollow(m_parent, "hollow.svg", 5, m_common_gizmos_data.get()));
-    m_gizmos.emplace_back(new GLGizmoSlaSupports(m_parent, "sla_supports.svg", 6, m_common_gizmos_data.get()));
+    m_gizmos.emplace_back(new GLGizmoHollow(m_parent, "hollow.svg", 5));
+    m_gizmos.emplace_back(new GLGizmoSlaSupports(m_parent, "sla_supports.svg", 6));
+
+    m_common_gizmos_data.reset(new CommonGizmosData());
+    dynamic_cast<GLGizmoHollow*>(m_gizmos[Hollow].get())->set_common_data_ptr(m_common_gizmos_data.get());
+    dynamic_cast<GLGizmoSlaSupports*>(m_gizmos[SlaSupports].get())->set_common_data_ptr(m_common_gizmos_data.get());
 
     for (auto& gizmo : m_gizmos) {
         if (! gizmo->init()) {
@@ -1051,5 +1055,126 @@ bool GLGizmosManager::grabber_contains_mouse() const
     return (curr != nullptr) ? (curr->get_hover_id() != -1) : false;
 }
 
+
+
+CommonGizmosData::CommonGizmosData()
+{
+    m_clipping_plane.reset(new ClippingPlane(Vec3d::Zero(), 0.));
+}
+
+
+
+bool CommonGizmosData::update_from_backend(GLCanvas3D& canvas, ModelObject* model_object)
+{
+    recent_update = false;
+    bool object_changed = false;
+
+    if (m_model_object != model_object
+    || (model_object && m_model_object_id != model_object->id())) {
+        m_model_object = model_object;
+        m_print_object_idx = -1;
+        m_mesh_raycaster.reset();
+        m_object_clipper.reset();
+        m_supports_clipper.reset();
+        m_old_mesh = nullptr;
+        m_mesh = nullptr;
+        m_backend_mesh_transformed.clear();
+
+        object_changed = true;
+        recent_update = true;
+    }
+
+    if (m_model_object) {
+        int active_inst = canvas.get_selection().get_instance_idx();
+        if (m_active_instance != active_inst) {
+            m_active_instance = active_inst;
+            m_active_instance_bb_radius = m_model_object->instance_bounding_box(m_active_instance).radius();
+            recent_update = true;
+        }
+    }
+
+
+    if (! m_model_object || ! canvas.get_selection().is_from_single_instance())
+        return false;
+
+    int old_po_idx = m_print_object_idx;
+
+    // First we need a pointer to the respective SLAPrintObject. The index into objects vector is
+    // cached so we don't have todo it on each render. We only search for the po if needed:
+    if (m_print_object_idx < 0 || (int)canvas.sla_print()->objects().size() != m_print_objects_count) {
+        m_print_objects_count = canvas.sla_print()->objects().size();
+        m_print_object_idx = -1;
+        for (const SLAPrintObject* po : canvas.sla_print()->objects()) {
+            ++m_print_object_idx;
+            if (po->model_object()->id() == m_model_object->id())
+                break;
+        }
+    }
+
+    bool mesh_exchanged = false;
+    m_mesh = nullptr;
+    // Load either the model_object mesh, or one provided by the backend
+    // This mesh does not account for the possible Z up SLA offset.
+    // The backend mesh needs to be transformed and because a pointer to it is
+    // saved, a copy is stored as a member (FIXME)
+    if (m_print_object_idx >=0) {
+        const SLAPrintObject* po = canvas.sla_print()->objects()[m_print_object_idx];
+        if (po->is_step_done(slaposDrillHoles)) {
+            m_backend_mesh_transformed = po->get_mesh_to_print();
+            m_backend_mesh_transformed.transform(canvas.sla_print()->sla_trafo(*m_model_object).inverse());
+            m_mesh = &m_backend_mesh_transformed;
+            m_has_drilled_mesh = true;
+            mesh_exchanged = true;
+        }
+    }
+
+    if (! m_mesh) {
+        m_mesh = &m_model_object->volumes.front()->mesh();
+        m_backend_mesh_transformed.clear();
+        m_has_drilled_mesh = false;
+    }
+
+    m_model_object_id = m_model_object->id();
+
+    if (m_mesh != m_old_mesh) {
+        // Update clipping plane position.
+        float new_clp_pos = m_clipping_plane_distance;
+        if (object_changed) {
+            new_clp_pos = 0.f;
+            m_clipping_plane_was_moved = false;
+        } else {
+            // After we got a drilled mesh, move the cp to 25% (if not used already)
+            if (m_clipping_plane_distance == 0.f && mesh_exchanged && m_has_drilled_mesh) {
+                new_clp_pos = 0.25f;
+                m_clipping_plane_was_moved = false; // so it uses current camera direction
+            }
+        }
+        m_clipping_plane_distance = new_clp_pos;
+        m_clipping_plane_distance_stash = new_clp_pos;
+
+        m_schedule_aabb_calculation = true;
+        recent_update = true;
+        return true;
+    }
+    if (! recent_update)
+        recent_update = m_print_object_idx < 0 && old_po_idx >= 0;
+
+    return recent_update;
+}
+
+
+void CommonGizmosData::build_AABB_if_needed()
+{
+    if (! m_schedule_aabb_calculation)
+        return;
+
+    wxBusyCursor wait;
+    m_mesh_raycaster.reset(new MeshRaycaster(*m_mesh));
+    m_object_clipper.reset();
+    m_supports_clipper.reset();
+    m_old_mesh = m_mesh;
+    m_schedule_aabb_calculation = false;
+}
+
 } // namespace GUI
 } // namespace Slic3r
diff --git a/src/slic3r/GUI/Gizmos/GLGizmosManager.hpp b/src/slic3r/GUI/Gizmos/GLGizmosManager.hpp
index 2110e7b69..a479b645b 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmosManager.hpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmosManager.hpp
@@ -227,6 +227,65 @@ private:
     bool grabber_contains_mouse() const;
 };
 
+
+
+class MeshRaycaster;
+class MeshClipper;
+
+// This class is only for sharing SLA related data between SLA gizmos
+// and its synchronization with backend data. It should not be misused
+// for anything else.
+class CommonGizmosData {
+public:
+    CommonGizmosData();
+    const TriangleMesh* mesh() const {
+        return (! m_mesh ? nullptr : m_mesh); //(m_cavity_mesh ? m_cavity_mesh.get() : m_mesh));
+    }
+
+    bool update_from_backend(GLCanvas3D& canvas, ModelObject* model_object);
+    bool recent_update = false;
+    static constexpr float HoleStickOutLength = 1.f;
+
+    ModelObject* m_model_object = nullptr;
+    const TriangleMesh* m_mesh;
+    std::unique_ptr<MeshRaycaster> m_mesh_raycaster;
+    std::unique_ptr<MeshClipper> m_object_clipper;
+    std::unique_ptr<MeshClipper> m_supports_clipper;
+
+    //std::unique_ptr<TriangleMesh> m_cavity_mesh;
+    //std::unique_ptr<GLVolume> m_volume_with_cavity;
+
+    int m_active_instance = -1;
+    float m_active_instance_bb_radius = 0;
+    ObjectID m_model_object_id = 0;
+    int m_print_object_idx = -1;
+    int m_print_objects_count = -1;
+    int m_old_timestamp = -1;
+
+    float m_clipping_plane_distance = 0.f;
+    std::unique_ptr<ClippingPlane> m_clipping_plane;
+    bool m_clipping_plane_was_moved = false;
+
+    void stash_clipping_plane() {
+        m_clipping_plane_distance_stash = m_clipping_plane_distance;
+    }
+
+    void unstash_clipping_plane() {
+        m_clipping_plane_distance = m_clipping_plane_distance_stash;
+    }
+
+    bool has_drilled_mesh() const { return m_has_drilled_mesh; }
+
+    void build_AABB_if_needed();
+
+private:
+    const TriangleMesh* m_old_mesh;
+    TriangleMesh m_backend_mesh_transformed;
+    float m_clipping_plane_distance_stash = 0.f;
+    bool m_has_drilled_mesh = false;
+    bool m_schedule_aabb_calculation = false;
+};
+
 } // namespace GUI
 } // namespace Slic3r