1 files changed, 53 insertions, 0 deletions
diff --git a/xs/src/libslic3r/Flow.hpp b/xs/src/libslic3r/Flow.hpp
new file mode 100644
index 000000000..88cae2477
--- /dev/null
+++ b/xs/src/libslic3r/Flow.hpp
@@ -0,0 +1,53 @@
+#ifndef slic3r_Flow_hpp_
+#define slic3r_Flow_hpp_
+
+#include <myinit.h>
+#include "Config.hpp"
+#include "ExtrusionEntity.hpp"
+
+namespace Slic3r {
+
+#define BRIDGE_EXTRA_SPACING 0.05
+#define OVERLAP_FACTOR 1.0
+
+enum FlowRole {
+    frExternalPerimeter,
+    frPerimeter,
+    frInfill,
+    frSolidInfill,
+    frTopSolidInfill,
+    frSupportMaterial,
+    frSupportMaterialInterface,
+};
+
+class Flow
+{
+    public:
+    float width, height, nozzle_diameter;
+    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 scale_(this->width);
+    };
+    coord_t scaled_spacing() const {
+        return scale_(this->spacing());
+    };
+    
+    static Flow new_from_config_width(FlowRole role, const ConfigOptionFloatOrPercent &width, float nozzle_diameter, float height, float bridge_flow_ratio);
+    static Flow new_from_spacing(float spacing, float nozzle_diameter, float height, bool bridge);
+    
+    private:
+    static float _bridge_width(float nozzle_diameter, float bridge_flow_ratio);
+    static float _auto_width(FlowRole role, float nozzle_diameter, float height);
+    static float _width_from_spacing(float spacing, float nozzle_diameter, float height, bool bridge);
+    static float _spacing(float width, float nozzle_diameter, float height, float bridge_flow_ratio);
+};
+
+}
+
+#endif