BBL Port Color Mix Base

src/libslic3r/GCode.hpp

@@ -747,6 +747,11 @@ private:
     Print* m_curr_print = nullptr;
     unsigned int m_toolchange_count;
     coordf_t m_nominal_z;
+    // Mixed-color sublayer state. Non-zero only while emitting a mixed slot's sub-layer:
+    // scales extrusion flow to the sub-layer's share of the nominal layer height, and
+    // reports that sub-height as the effective extrusion height. Reset to 0 afterwards.
+    double   m_sub_layer_flow_ratio = 0.0;
+    double   m_sub_layer_height     = 0.0;
     bool m_need_change_layer_lift_z = false;
     int m_start_gcode_filament = -1;
     std::string m_filament_instances_code;