AABB trees for SLA gizmos are not calculated when the object is selec…

…ted, but only after one of the gizmos is opened

src/slic3r/GUI/Gizmos/GLGizmoBase.cpp

@@ -371,13 +371,7 @@ bool CommonGizmosData::update_from_backend(GLCanvas3D& canvas, ModelObject* mode
     m_model_object_id = m_model_object->id();
 
     if (m_mesh != m_old_mesh) {
-        wxBusyCursor wait;
-        m_mesh_raycaster.reset(new MeshRaycaster(*m_mesh));
-        m_object_clipper.reset();
-        m_supports_clipper.reset();
-        m_old_mesh = m_mesh;
-        m_clipping_plane_distance = 0.f;
-        m_clipping_plane_distance_stash = 0.f;
+        m_schedule_aabb_calculation = true;
         recent_update = true;
         return true;
     }
@@ -388,6 +382,21 @@ bool CommonGizmosData::update_from_backend(GLCanvas3D& canvas, ModelObject* mode
 }
 
 
+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_clipping_plane_distance = 0.f;
+    m_clipping_plane_distance_stash = 0.f;
+    m_schedule_aabb_calculation = false;
+}
+
 
 } // namespace GUI
 } // namespace Slic3r

src/slic3r/GUI/Gizmos/GLGizmoBase.hpp

@@ -231,11 +231,14 @@ class CommonGizmosData {
 
     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

src/slic3r/GUI/Gizmos/GLGizmoHollow.cpp

@@ -57,6 +57,10 @@ bool GLGizmoHollow::on_init()
 void GLGizmoHollow::set_sla_support_data(ModelObject*, const Selection&)
 {
     if (m_c->recent_update) {
+        if (m_state == On)
+            m_c->build_AABB_if_needed();
+
+        update_clipping_plane();
 
         if (m_c->m_model_object) {
             reload_cache();
@@ -983,6 +987,8 @@ void GLGizmoHollow::on_set_state()
         m_c->unstash_clipping_plane();
         update_clipping_plane(m_c->m_clipping_plane_distance != 0.f);
 
+        m_c->build_AABB_if_needed();
+
         // we'll now reload support points:
         if (m_c->m_model_object)
             reload_cache();

src/slic3r/GUI/Gizmos/GLGizmoSlaSupports.cpp

@@ -63,7 +63,16 @@ bool GLGizmoSlaSupports::on_init()
 
 void GLGizmoSlaSupports::set_sla_support_data(ModelObject* model_object, const Selection& selection)
 {
+    // Update common data for hollowing and sla support gizmos.
+    if (wxGetApp().preset_bundle->printers.get_edited_preset().printer_technology() == ptSLA)
+        m_c->update_from_backend(m_parent, model_object);
+
     if (m_c->recent_update) {
+        if (m_state == On)
+            m_c->build_AABB_if_needed();
+
+        update_clipping_plane();
+
         if (m_state == On) {
             m_parent.toggle_model_objects_visibility(false);
             m_parent.toggle_model_objects_visibility(/*! m_c->m_cavity_mesh*/ true, m_c->m_model_object, m_c->m_active_instance);
@@ -1004,6 +1013,8 @@ void GLGizmoSlaSupports::on_set_state()
         m_c->unstash_clipping_plane();
         update_clipping_plane(m_c->m_clipping_plane_distance != 0.f);
 
+        m_c->build_AABB_if_needed();
+
 
         // we'll now reload support points:
         if (m_c->m_model_object)

src/slic3r/GUI/Gizmos/GLGizmosManager.cpp

@@ -351,19 +351,8 @@ void GLGizmosManager::set_sla_support_data(ModelObject* model_object)
     auto* gizmo_supports = dynamic_cast<GLGizmoSlaSupports*>(m_gizmos[SlaSupports].get());
     auto* gizmo_hollow = dynamic_cast<GLGizmoHollow*>(m_gizmos[Hollow].get());
 
-
-    // Update common data for hollowing and sla support gizmos.
-    if (wxGetApp().preset_bundle->printers.get_edited_preset().printer_technology() == ptSLA) {
-        if (m_common_gizmos_data->update_from_backend(m_parent, model_object)) {
-            // FIXME: this is a hack to make that the clipping plane is
-            // updated when the update set its position to zero. The clipping
-            // plane itself should be common, including the update_function.
-            // Then update_from_backend could do it itself.
-            gizmo_supports->update_clipping_plane();
-            gizmo_hollow->update_clipping_plane();
-        }
-    }
-
+    // note: sla support gizmo takes care of updating the common data.
+    // following lines are thus dependent
     gizmo_supports->set_sla_support_data(model_object, m_parent.get_selection());
     gizmo_hollow->set_sla_support_data(model_object, m_parent.get_selection());
 }