From 8b0784f26c363ed1a6fc592035288cbbbd2d9002 Mon Sep 17 00:00:00 2001
From: bubnikv <bubnikv@gmail.com>
Date: Mon, 28 Nov 2016 17:34:52 +0100
Subject: [PATCH] Added a free "cross product" function to Pointf (thinking the
 Pointf is really a vector in this case).

Made the == operator inline.
---
 xs/src/libslic3r/Point.cpp | 6 ------
 xs/src/libslic3r/Point.hpp | 4 +++-
 2 files changed, 3 insertions(+), 7 deletions(-)

diff --git a/xs/src/libslic3r/Point.cpp b/xs/src/libslic3r/Point.cpp
index 8b71746e0..2ee5dabdd 100644
--- a/xs/src/libslic3r/Point.cpp
+++ b/xs/src/libslic3r/Point.cpp
@@ -12,12 +12,6 @@ Point::Point(double x, double y)
     this->y = lrint(y);
 }
 
-bool
-Point::operator==(const Point& rhs) const
-{
-    return this->coincides_with(rhs);
-}
-
 std::string
 Point::wkt() const
 {
diff --git a/xs/src/libslic3r/Point.hpp b/xs/src/libslic3r/Point.hpp
index 2cf046133..a69f8d9f8 100644
--- a/xs/src/libslic3r/Point.hpp
+++ b/xs/src/libslic3r/Point.hpp
@@ -36,7 +36,7 @@ class Point
     static Point new_scale(coordf_t x, coordf_t y) {
         return Point(scale_(x), scale_(y));
     };
-    bool operator==(const Point& rhs) const;
+    bool operator==(const Point& rhs) const { return this->x == rhs.x && this->y == rhs.y; }
     std::string wkt() const;
     std::string dump_perl() const;
     void scale(double factor);
@@ -105,6 +105,8 @@ class Pointf
 inline Pointf operator+(const Pointf& point1, const Pointf& point2) { return Pointf(point1.x + point2.x, point1.y + point2.y); }
 inline Pointf operator-(const Pointf& point1, const Pointf& point2) { return Pointf(point1.x - point2.x, point1.y - point2.y); }
 inline Pointf operator*(double scalar, const Pointf& point2) { return Pointf(scalar * point2.x, scalar * point2.y); }
+inline Pointf operator*(const Pointf& point2, double scalar) { return Pointf(scalar * point2.x, scalar * point2.y); }
+inline coordf_t cross(const Pointf &v1, const Pointf &v2) { return v1.x * v2.y - v1.y * v2.x; }
 
 class Pointf3 : public Pointf
 {