fix adjust_layer_height_profile for high z_step GLCanvas3D.cpp

from a work by @Pavulon87

src/libslic3r/Slicing.cpp

@@ -24,7 +24,7 @@ namespace Slic3r
 static const coordf_t MIN_LAYER_HEIGHT = 0.01;
 static const coordf_t MIN_LAYER_HEIGHT_DEFAULT = 0.07;
 // fields are with 8-number precision after the dot
-inline coordf_t check_z_step(const coordf_t val, const coordf_t z_step) {
+coordf_t check_z_step(const coordf_t val, const coordf_t z_step) {
     if (z_step <= EPSILON) return val;
     uint64_t valint = uint64_t(val * 100000000. + 0.1);
     uint64_t stepint = uint64_t(z_step * 100000000. + 0.1);

src/libslic3r/Slicing.hpp

@@ -20,7 +20,8 @@ class PrintConfig;
 class PrintObjectConfig;
 class ModelObject;
 
-coordf_t check_z_step(const coordf_t val,const coordf_t z_step);
+// little function that return val as a multiple of z_step if z_step is not == 0
+extern coordf_t check_z_step(const coordf_t val,const coordf_t z_step);
 
 // Parameters to guide object slicing and support generation.
 // The slicing parameters account for a raft and whether the 1st object layer is printed with a normal or a bridging flow

src/slic3r/GUI/GLCanvas3D.cpp

@@ -141,7 +141,6 @@ GLCanvas3D::LayersEditing::LayersEditing()
     , m_adaptive_quality(0.5f)
     , state(Unknown)
     , band_width(2.0f)
-    , strength(0.005f)
     , last_object_id(-1)
     , last_z(0.0f)
     , last_action(LAYER_HEIGHT_EDIT_ACTION_INCREASE)
@@ -534,7 +533,10 @@ void GLCanvas3D::LayersEditing::adjust_layer_height_profile()
 {
 	this->update_slicing_parameters();
 	PrintObject::update_layer_height_profile(*m_model_object, *m_slicing_parameters, m_layer_height_profile);
-	Slic3r::adjust_layer_height_profile(*m_slicing_parameters, m_layer_height_profile, this->last_z, this->strength, this->band_width, this->last_action);
+    //update strength
+    float strength = 0.005f;
+    if (m_slicing_parameters->z_step > EPSILON) strength = (float)Slic3r::check_z_step(std::max(0.005, m_slicing_parameters->z_step), m_slicing_parameters->z_step);
+	Slic3r::adjust_layer_height_profile(*m_slicing_parameters, m_layer_height_profile, this->last_z, strength, this->band_width, this->last_action);
 	m_layer_height_profile_modified = true;
     m_layers_texture.valid = false;
 }

src/slic3r/GUI/GLCanvas3D.hpp

@@ -204,7 +204,7 @@ private:
     public:
         EState state;
         float band_width;
-        float strength;
+        //float strength;
         int last_object_id;
         float last_z;
         LayerHeightEditActionType last_action;

src/slic3r/GUI/Tab.cpp

@@ -45,16 +45,6 @@ namespace GUI {
 wxDEFINE_EVENT(EVT_TAB_VALUE_CHANGED, wxCommandEvent);
 wxDEFINE_EVENT(EVT_TAB_PRESETS_CHANGED, SimpleEvent);
 
-//same as the slicing.cpp method, but it's easier to redefine it here
-// maybe i should have written it in the header.
-inline coordf_t check_z_step_temp(coordf_t val, coordf_t z_step) {
-    if (z_step <= EPSILON) return val;
-    uint64_t valint = uint64_t(val * 100000000. + 0.1);
-    uint64_t stepint = uint64_t(z_step * 100000000. + 0.1);
-    return (((valint + (stepint / 2)) / stepint) * stepint) / 100000000.;
-    //return int((val + z_step * 0.5) / z_step) * z_step;
-}
-
 Tab::Tab(wxNotebook* parent, const wxString& title, Preset::Type type) :
     m_parent(parent), m_title(title), m_type(type)
 {
@@ -2600,7 +2590,7 @@ void TabPrinter::update_fff()
             if (min_layer_height[i] / z_step != 0) {
                 if(!has_changed )
                     new_conf = *m_config;
-                new_conf.option<ConfigOptionFloats>("min_layer_height")->values[i] = std::max(z_step, check_z_step_temp(new_conf.option<ConfigOptionFloats>("min_layer_height")->values[i], z_step));
+                new_conf.option<ConfigOptionFloats>("min_layer_height")->values[i] = std::max(z_step, Slic3r::check_z_step(new_conf.option<ConfigOptionFloats>("min_layer_height")->values[i], z_step));
                 has_changed = true;
             }
         const std::vector<double>& max_layer_height = m_config->option<ConfigOptionFloats>("max_layer_height")->values;
@@ -2608,7 +2598,7 @@ void TabPrinter::update_fff()
             if (max_layer_height[i] / z_step != 0) {
                 if (!has_changed)
                     new_conf = *m_config;
-                new_conf.option<ConfigOptionFloats>("max_layer_height")->values[i] = std::max(z_step, check_z_step_temp(new_conf.option<ConfigOptionFloats>("max_layer_height")->values[i], z_step));
+                new_conf.option<ConfigOptionFloats>("max_layer_height")->values[i] = std::max(z_step, Slic3r::check_z_step(new_conf.option<ConfigOptionFloats>("max_layer_height")->values[i], z_step));
                 has_changed = true;
             }
         if (has_changed) {