Simulation of extrusion in a plane, useful for finding out under / over-extruions.

xs/xsp/ExtrusionSimulator.xsp

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+%module{Slic3r::XS};
+
+%{
+#include <xsinit.h>
+#include "libslic3r/ExtrusionSimulator.hpp"
+%}
+
+%name{Slic3r::ExtrusionSimulator} class ExtrusionSimulator {
+    ~ExtrusionSimulator();
+    %name{_new} ExtrusionSimulator();
+
+    Clone<ExtrusionSimulator> clone()
+        %code{% RETVAL = THIS; %};
+    
+    void  set_image_size(Point *image_size)
+        %code{% THIS->set_image_size(*image_size); %};
+    void  set_viewport(BoundingBox *viewport)
+        %code{% THIS->set_viewport(*viewport); %};
+    void  set_bounding_box(BoundingBox *bbox)
+        %code{% THIS->set_bounding_box(*bbox); %};
+
+    void  reset_accumulator();
+    void  extrude_to_accumulator(ExtrusionPath *path, Point *shift, ExtrusionSimulationType simulationType)
+        %code{% THIS->extrude_to_accumulator(*path, *shift, simulationType); %};
+    void  evaluate_accumulator(ExtrusionSimulationType simulationType);
+    void* image_ptr()
+        %code{% RETVAL = const_cast<void*>(const_cast<Slic3r::ExtrusionSimulator*>(THIS)->image_ptr()); %};
+
+%{
+
+%}
+};
+
+%package{Slic3r::ExtrusionSimulator};
+%{
+
+IV
+_constant()
+  ALIAS:
+    EXTRSIM_SIMPLE          = ExtrusionSimulationSimple
+    EXTRSIM_DONT_SPREAD     = ExtrusionSimulationDontSpread
+    EXTRSIM_SPREAD_NFULL     = ExtrisopmSimulationSpreadNotOverfilled
+    EXTRSIM_SPREAD_FULL     = ExtrusionSimulationSpreadFull
+    EXTRSIM_SPREAD_EXCESS   = ExtrusionSimulationSpreadExcess
+  PROTOTYPE:
+  CODE:
+    RETVAL = ix;
+  OUTPUT: RETVAL
+
+%}