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Ported ExPolygon->area()

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This commit is contained in:
Alessandro Ranellucci 2013-08-26 22:50:26 +02:00
parent 792fcba7be
commit 706851f836
7 changed files with 19 additions and 12 deletions
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10
xs/src/ExPolygon.cpp
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@ -30,6 +30,16 @@ ExPolygon::rotate(double angle, Point* center)
}
}
double
ExPolygon::area() const
{
double a = this->contour.area();
for (Polygons::const_iterator it = this->holes.begin(); it != this->holes.end(); ++it) {
a -= -(*it).area(); // holes have negative area
}
return a;
}
SV*
ExPolygon::to_SV() {
const unsigned int num_holes = this->holes.size();

1
xs/src/ExPolygon.hpp
View file

@ -19,6 +19,7 @@ class ExPolygon
void scale(double factor);
void translate(double x, double y);
void rotate(double angle, Point* center);
double area() const;
};
typedef std::vector<ExPolygon> ExPolygons;

4
xs/src/Polygon.cpp
View file

@ -55,7 +55,7 @@ Polygon::split_at_first_point()
}
double
Polygon::area()
Polygon::area() const
{
ClipperLib::Polygon p;
Slic3rPolygon_to_ClipperPolygon(*this, p);
@ -63,7 +63,7 @@ Polygon::area()
}
bool
Polygon::is_counter_clockwise()
Polygon::is_counter_clockwise() const
{
ClipperLib::Polygon* p = new ClipperLib::Polygon();
Slic3rPolygon_to_ClipperPolygon(*this, *p);

4
xs/src/Polygon.hpp
View file

@ -16,8 +16,8 @@ class Polygon : public MultiPoint {
Polyline* split_at(const Point* point);
Polyline* split_at_index(int index);
Polyline* split_at_first_point();
double area();
bool is_counter_clockwise();
double area() const;
bool is_counter_clockwise() const;
bool make_counter_clockwise();
bool make_clockwise();
};