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Fix of a regression bug in Dauglass Peucker contour simplification

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after an introduction of a non-recursive variant of the algorithm.
Fixes "Strange behavior while printing curved perimeters #1503"

Fixed some compilation warnings.
This commit is contained in:
bubnikv 2019-01-02 16:27:11 +01:00
parent 2db0906071
commit d0fc403741
1 changed files with 11 additions and 10 deletions
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21
src/libslic3r/MultiPoint.cpp
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@ -18,8 +18,8 @@ void MultiPoint::scale(double factor_x, double factor_y)
{
for (Point &pt : points)
{
pt(0) *= factor_x;
pt(1) *= factor_y;
pt(0) = coord_t(pt(0) * factor_x);
pt(1) = coord_t(pt(1) * factor_y);
}
}
@ -83,7 +83,7 @@ MultiPoint::find_point(const Point &point) const
{
for (const Point &pt : this->points)
if (pt == point)
return &pt - &this->points.front();
return int(&pt - &this->points.front());
return -1; // not found
}
@ -165,6 +165,7 @@ bool MultiPoint::first_intersection(const Line& line, Point* intersection) const
std::vector<Point> MultiPoint::_douglas_peucker(const std::vector<Point>& pts, const double tolerance)
{
std::vector<Point> result_pts;
double tolerance_sq = tolerance * tolerance;
if (! pts.empty()) {
const Point *anchor = &pts.front();
size_t anchor_idx = 0;
@ -178,18 +179,18 @@ std::vector<Point> MultiPoint::_douglas_peucker(const std::vector<Point>& pts, c
dpStack.reserve(pts.size());
dpStack.emplace_back(floater_idx);
for (;;) {
double max_distSq = 0.0;
double max_dist_sq = 0.0;
size_t furthest_idx = anchor_idx;
// find point furthest from line seg created by (anchor, floater) and note it
for (size_t i = anchor_idx + 1; i < floater_idx; ++ i) {
double dist = Line::distance_to_squared(pts[i], *anchor, *floater);
if (dist > max_distSq) {
max_distSq = dist;
double dist_sq = Line::distance_to_squared(pts[i], *anchor, *floater);
if (dist_sq > max_dist_sq) {
max_dist_sq = dist_sq;
furthest_idx = i;
}
}
// remove point if less than tolerance
if (max_distSq <= tolerance) {
if (max_dist_sq <= tolerance_sq) {
result_pts.emplace_back(*floater);
anchor_idx = floater_idx;
anchor = floater;
@ -332,8 +333,8 @@ Points MultiPoint::visivalingam(const Points& pts, const double& tolerance)
void MultiPoint3::translate(double x, double y)
{
for (Vec3crd &p : points) {
p(0) += x;
p(1) += y;
p(0) += coord_t(x);
p(1) += coord_t(y);
}
}