Ported simplify() to XS and removed dependency on Boost::Geometry::Utils

xs/src/MultiPoint.cpp

@@ -56,11 +56,11 @@ MultiPoint::is_valid() const
 }
 
 Points
-MultiPoint::_douglas_peucker(Points &points, double tolerance)
+MultiPoint::_douglas_peucker(const Points &points, const double tolerance)
 {
     Points results;
     double dmax = 0;
-    int index = 0;
+    size_t index = 0;
     Line full(points.front(), points.back());
     for (Points::const_iterator it = points.begin() + 1; it != points.end(); ++it) {
         double d = it->distance_to(full);

xs/src/MultiPoint.hpp

@@ -21,7 +21,7 @@ class MultiPoint
     virtual Lines lines() const = 0;
     double length() const;
     bool is_valid() const;
-    static Points _douglas_peucker(Points &points, double tolerance);
+    static Points _douglas_peucker(const Points &points, const double tolerance);
     
     #ifdef SLIC3RXS
     void from_SV(SV* poly_sv);

xs/src/Point.cpp

@@ -1,6 +1,6 @@
 #include "Point.hpp"
 #include "Line.hpp"
-#include <math.h>
+#include <cmath>
 
 namespace Slic3r {
 
@@ -87,7 +87,7 @@ Point::distance_to(const Line &line) const
     double n = (line.b.x - line.a.x) * (line.a.y - this->y)
         - (line.a.x - this->x) * (line.b.y - line.a.y);
     
-    return abs(n) / line.length();
+    return std::abs(n) / line.length();
 }
 
 #ifdef SLIC3RXS

xs/src/SurfaceCollection.cpp

@@ -3,11 +3,19 @@
 namespace Slic3r {
 
 void
-simplify(double tolerance)
+SurfaceCollection::simplify(double tolerance)
 {
-    for (Surfaces::iterator it = this->surfaces.begin(); it != this->surfaces.end(); ++it) {
-        throw "Unimplemented";
+    Surfaces ss;
+    for (Surfaces::const_iterator it_s = this->surfaces.begin(); it_s != this->surfaces.end(); ++it_s) {
+        ExPolygons expp;
+        it_s->expolygon.simplify(tolerance, expp);
+        for (ExPolygons::const_iterator it_e = expp.begin(); it_e != expp.end(); ++it_e) {
+            Surface s = *it_s;
+            s.expolygon = *it_e;
+            ss.push_back(s);
+        }
     }
+    this->surfaces = ss;
 }
 
 }