#110 remove use_bridge from infills

force bridge on "denser infill" layer (as it's removed from the infill now)

src/libslic3r/Fill/Fill.cpp

@@ -228,6 +228,7 @@ void make_fill(LayerRegion &layerm, ExtrusionEntityCollection &out)
                 && surface.maxNbSolidLayersOnTop > 0) {
                 density = 42;
                 is_denser = true;
+                is_bridge = true;
                 fill_pattern = ipRectiWithPerimeter;
             }
             if (density <= 0)
@@ -243,7 +244,7 @@ void make_fill(LayerRegion &layerm, ExtrusionEntityCollection &out)
         Flow flow = layerm.region()->flow(
             role,
             h,
-            is_bridge || f->use_bridge_flow(),  // bridge flow?
+            is_bridge,  // bridge flow?
             layerm.layer()->id() == 0,          // first layer?
             -1,                                 // auto width
             *layerm.layer()->object()
@@ -312,7 +313,7 @@ void make_fill(LayerRegion &layerm, ExtrusionEntityCollection &out)
             // so we can safely ignore the slight variation that might have
             // been applied to $f->flow_spacing
         } else {
-            flow = Flow::new_from_spacing(f->spacing, flow.nozzle_diameter, (float)h, is_bridge || f->use_bridge_flow());
+            flow = Flow::new_from_spacing(f->spacing, flow.nozzle_diameter, (float)h, is_bridge);
         }
         
         //adjust flow (to over-extrude when needed)

src/libslic3r/Fill/Fill3DHoneycomb.hpp

@@ -15,9 +15,6 @@ public:
     virtual Fill* clone() const { return new Fill3DHoneycomb(*this); };
     virtual ~Fill3DHoneycomb() {}
 
-	// require bridge flow since most of this pattern hangs in air
-    virtual bool use_bridge_flow() const { return true; }
-
 protected:
 	virtual void _fill_surface_single(
 	    const FillParams                &params, 

src/libslic3r/Fill/FillBase.cpp

@@ -55,24 +55,6 @@ Fill* Fill::new_from_type(const std::string &type)
     return (it == enum_keys_map.end()) ? nullptr : new_from_type(InfillPattern(it->second));
 }
 
-// Force initialization of the Fill::use_bridge_flow() internal static map in a thread safe fashion even on compilers
-// not supporting thread safe non-static data member initializers.
-static bool use_bridge_flow_initializer = Fill::use_bridge_flow(ipGrid);
-
-bool Fill::use_bridge_flow(const InfillPattern type)
-{
-	static std::vector<unsigned char> cached;
-	if (cached.empty()) {
-		cached.assign(size_t(ipCount), 0);
-		for (size_t i = 0; i < cached.size(); ++ i) {
-			auto *fill = Fill::new_from_type((InfillPattern)i);
-			cached[i] = fill->use_bridge_flow();
-			delete fill;
-		}
-	}
-	return cached[type] != 0;
-}
-
 Polylines Fill::fill_surface(const Surface *surface, const FillParams &params)
 {
     // Perform offset.

src/libslic3r/Fill/FillBase.hpp

@@ -94,13 +94,9 @@ public:
 
     static Fill* new_from_type(const InfillPattern type);
     static Fill* new_from_type(const std::string &type);
-    static bool  use_bridge_flow(const InfillPattern type);
 
     void         set_bounding_box(const Slic3r::BoundingBox &bbox) { bounding_box = bbox; }
 
-    // Use bridge flow for the fill?
-    virtual bool use_bridge_flow() const { return false; }
-
     // Do not sort the fill lines to optimize the print head path?
     virtual bool no_sort() const { return false; }
 

src/libslic3r/Fill/FillGyroid.hpp

@@ -13,9 +13,6 @@ public:
     FillGyroid() {}
     virtual Fill* clone() const { return new FillGyroid(*this); }
 
-    // require bridge flow since most of this pattern hangs in air
-    virtual bool use_bridge_flow() const { return false; }
-
     // Correction applied to regular infill angle to maximize printing
     // speed in default configuration (degrees)
     static constexpr float CorrectionAngle = -45.;

src/libslic3r/Fill/FillRectilinear2.hpp

@@ -76,8 +76,6 @@ protected:
 class FillRectilinear2Peri : public FillRectilinear2
 {
 public:
-    // require bridge flow since it's a pre-bridge over very sparse infill
-    virtual bool use_bridge_flow() const { return true; }
 
     virtual Fill* clone() const { return new FillRectilinear2Peri(*this); };
     virtual ~FillRectilinear2Peri() {}
@@ -102,8 +100,6 @@ protected:
 
 class FillRectilinearSawtooth : public FillRectilinear2 {
 public:
-    // require bridge flow since it's a pre-bridge over very sparse infill
-    virtual bool use_bridge_flow() const { return true; }
 
     virtual Fill* clone() const { return new FillRectilinearSawtooth(*this); };
     virtual ~FillRectilinearSawtooth() {}