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Iterative, not recursive, version of the Douglas-Peucker-Ramer algorithm

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based on the work by @fuchstraumer
https://github.com/slic3r/Slic3r/pull/3825
https://gist.github.com/fuchstraumer/9421573fc281b946e5f561758961212a
which was based on
http://anis-moussa.blogspot.com/2014/03/ramer-douglas-peucker-algorithm-for.html
This commit is contained in:
bubnikv
2018-12-14 19:29:58 +01:00
parent 780b5667f3
commit 77d37f108c
3 changed files with 58 additions and 49 deletions
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6
src/libslic3r/Line.hpp
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@@ -31,7 +31,8 @@ public:
Point midpoint() const { return (this->a + this->b) / 2; }
bool intersection_infinite(const Line &other, Point* point) const;
bool operator==(const Line &rhs) const { return this->a == rhs.a && this->b == rhs.b; }
double distance_to(const Point &point) const;
double distance_to_squared(const Point &point) const { return distance_to_squared(point, this->a, this->b); }
double distance_to(const Point &point) const { return distance_to(point, this->a, this->b); }
double perp_distance_to(const Point &point) const;
bool parallel_to(double angle) const;
bool parallel_to(const Line &line) const { return this->parallel_to(line.direction()); }
@@ -43,6 +44,9 @@ public:
bool intersection(const Line& line, Point* intersection) const;
double ccw(const Point& point) const { return point.ccw(*this); }
static double distance_to_squared(const Point &point, const Point &a, const Point &b);
static double distance_to(const Point &point, const Point &a, const Point &b) { return sqrt(distance_to_squared(point, a, b)); }
Point a;
Point b;
};