1 files changed, 67 insertions, 0 deletions
diff --git a/src/libslic3r/Flow.hpp b/src/libslic3r/Flow.hpp
new file mode 100644
index 000000000..516490b35
--- /dev/null
+++ b/src/libslic3r/Flow.hpp
@@ -0,0 +1,67 @@
+#ifndef slic3r_Flow_hpp_
+#define slic3r_Flow_hpp_
+
+#include "libslic3r.h"
+#include "Config.hpp"
+#include "ExtrusionEntity.hpp"
+
+namespace Slic3r {
+
+class PrintObject;
+
+// Extra spacing of bridge threads, in mm.
+#define BRIDGE_EXTRA_SPACING 0.05
+
+// Overlap factor of perimeter lines. Currently no overlap.
+#ifdef HAS_PERIMETER_LINE_OVERLAP
+    #define PERIMETER_LINE_OVERLAP_FACTOR 1.0
+#endif
+
+enum FlowRole {
+    frExternalPerimeter,
+    frPerimeter,
+    frInfill,
+    frSolidInfill,
+    frTopSolidInfill,
+    frSupportMaterial,
+    frSupportMaterialInterface,
+};
+
+class Flow
+{
+public:
+    // Non bridging flow: Maximum width of an extrusion with semicircles at the ends.
+    // Bridging flow: Bridge thread diameter.
+    float width;
+    // Non bridging flow: Layer height.
+    // Bridging flow: Bridge thread diameter = layer height.
+    float height;
+    // Nozzle diameter. 
+    float nozzle_diameter;
+    // Is it a bridge?
+    bool  bridge;
+    
+    Flow(float _w, float _h, float _nd, bool _bridge = false) :
+        width(_w), height(_h), nozzle_diameter(_nd), bridge(_bridge) {};
+
+    float   spacing() const;
+    float   spacing(const Flow &other) const;
+    double  mm3_per_mm() const;
+    coord_t scaled_width() const { return coord_t(scale_(this->width)); };
+    coord_t scaled_spacing() const { return coord_t(scale_(this->spacing())); };
+    coord_t scaled_spacing(const Flow &other) const { return coord_t(scale_(this->spacing(other))); };
+    
+    static Flow new_from_config_width(FlowRole role, const ConfigOptionFloatOrPercent &width, float nozzle_diameter, float height, float bridge_flow_ratio);
+    // Create a flow from the spacing of extrusion lines.
+    // This method is used exclusively to calculate new flow of 100% infill, where the extrusion width was allowed to scale
+    // to fit a region with integer number of lines.
+    static Flow new_from_spacing(float spacing, float nozzle_diameter, float height, bool bridge);
+};
+
+extern Flow support_material_flow(const PrintObject *object, float layer_height = 0.f);
+extern Flow support_material_1st_layer_flow(const PrintObject *object, float layer_height = 0.f);
+extern Flow support_material_interface_flow(const PrintObject *object, float layer_height = 0.f);
+
+}
+
+#endif