Added a tooltip overlay for the variable layer height edit tool.

Short methods of PrintState made inline.
Added layer height profile to a Model class.

xs/src/libslic3r/Model.hpp

@@ -114,6 +114,9 @@ public:
     DynamicPrintConfig config;
     // Variation of a layer thickness for spans of Z coordinates.
     t_layer_height_ranges layer_height_ranges;
+    // Profile of increasing z to a layer height, to be linearly interpolated when calculating the layers.
+    // The pairs of <z, layer_height> are packed into a 1D array to simplify handling by the Perl XS.
+    std::vector<coordf_t> layer_height_profile;
 
     /* This vector accumulates the total translation applied to the object by the
         center_around_origin() method. Callers might want to apply the same translation

xs/src/libslic3r/Print.cpp

@@ -8,43 +8,6 @@
 
 namespace Slic3r {
 
-template <class StepClass>
-bool
-PrintState<StepClass>::is_started(StepClass step) const
-{
-    return this->started.find(step) != this->started.end();
-}
-
-template <class StepClass>
-bool
-PrintState<StepClass>::is_done(StepClass step) const
-{
-    return this->done.find(step) != this->done.end();
-}
-
-template <class StepClass>
-void
-PrintState<StepClass>::set_started(StepClass step)
-{
-    this->started.insert(step);
-}
-
-template <class StepClass>
-void
-PrintState<StepClass>::set_done(StepClass step)
-{
-    this->done.insert(step);
-}
-
-template <class StepClass>
-bool
-PrintState<StepClass>::invalidate(StepClass step)
-{
-    bool invalidated = this->started.erase(step) > 0;
-    this->done.erase(step);
-    return invalidated;
-}
-
 template class PrintState<PrintStep>;
 template class PrintState<PrintObjectStep>;
 

xs/src/libslic3r/Print.hpp

@@ -33,14 +33,18 @@ enum PrintObjectStep {
 template <class StepType>
 class PrintState
 {
-    public:
+public:
     std::set<StepType> started, done;
     
-    bool is_started(StepType step) const;
-    bool is_done(StepType step) const;
-    void set_started(StepType step);
-    void set_done(StepType step);
-    bool invalidate(StepType step);
+    bool is_started(StepType step) const { return this->started.find(step) != this->started.end(); }
+    bool is_done(StepType step) const { return this->done.find(step) != this->done.end(); }
+    void set_started(StepType step) { this->started.insert(step); }
+    void set_done(StepType step) { this->done.insert(step); }
+    bool invalidate(StepType step) {
+        bool invalidated = this->started.erase(step) > 0;
+        this->done.erase(step);
+        return invalidated;
+    }
 };
 
 // A PrintRegion object represents a group of volumes to print
@@ -143,7 +147,7 @@ public:
 
     // Process layer_height_ranges, the raft layers and first layer thickness into layer_height_profile.
     // The layer_height_profile may be later modified interactively by the user to refine layers at sloping surfaces.
-    void update_layer_height_profile();
+    bool update_layer_height_profile();
 
     // Collect the slicing parameters, to be used by variable layer thickness algorithm,
     // by the interactive layer height editor and by the printing process itself.

xs/src/libslic3r/PrintObject.cpp

@@ -49,6 +49,7 @@ PrintObject::PrintObject(Print* print, ModelObject* model_object, const Bounding
     
     this->reload_model_instances();
     this->layer_height_ranges = model_object->layer_height_ranges;
+    this->layer_height_profile = model_object->layer_height_profile;
 }
 
 bool
@@ -949,8 +950,9 @@ SlicingParameters PrintObject::slicing_parameters() const
         unscale(this->size.z), this->print()->object_extruders());
 }
 
-void PrintObject::update_layer_height_profile()
+bool PrintObject::update_layer_height_profile()
 {
+    bool updated = false;
     if (this->layer_height_profile.empty()) {
         if (0)
 //        if (this->layer_height_profile.empty())
@@ -958,7 +960,9 @@ void PrintObject::update_layer_height_profile()
                 this->model_object()->volumes);
         else
             this->layer_height_profile = layer_height_profile_from_ranges(this->slicing_parameters(), this->layer_height_ranges);
+        updated = true;
     }
+    return updated;
 }
 
 // 1) Decides Z positions of the layers,

xs/xsp/Model.xsp

@@ -4,6 +4,7 @@
 #include <xsinit.h>
 #include "libslic3r/Model.hpp"
 #include "libslic3r/PrintConfig.hpp"
+#include "libslic3r/Slicing.hpp"
 %}
 
 %name{Slic3r::Model} class Model {
@@ -169,6 +170,7 @@ ModelMaterial::attributes()
     void set_layer_height_ranges(t_layer_height_ranges ranges)
         %code%{ THIS->layer_height_ranges = ranges; %};
 
+
     Ref<Pointf3> origin_translation()
         %code%{ RETVAL = &THIS->origin_translation; %};
     void set_origin_translation(Pointf3* point)

xs/xsp/Print.xsp

@@ -3,7 +3,6 @@
 %{
 #include <xsinit.h>
 #include "libslic3r/Print.hpp"
-#include "libslic3r/Slicing.hpp"
 #include "libslic3r/PlaceholderParser.hpp"
 %}
 
@@ -121,6 +120,8 @@ _constant()
     void _infill();
     void _generate_support_material();
 
+    bool update_layer_height_profile();
+
     void adjust_layer_height_profile(coordf_t z, coordf_t layer_thickness_delta, coordf_t band_width, int action)
         %code%{ 
             THIS->update_layer_height_profile();