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Avoid placement of seams on bridging perimeters, if random seam is enabled.

Browse source 
https://github.com/alexrj/Slic3r/issues/3526#issuecomment-263125049
This commit is contained in:
bubnikv 2017-02-02 18:49:33 +01:00
parent 4256af22ff
commit 7e6390c4b6
4 changed files with 35 additions and 19 deletions
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42
xs/src/libslic3r/ExtrusionEntity.cpp
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@ -204,22 +204,38 @@ ExtrusionLoop::split_at_vertex(const Point &point)
return false;
}
void
ExtrusionLoop::split_at(const Point &point)
// Splitting an extrusion loop, possibly made of multiple segments, some of the segments may be bridging.
void ExtrusionLoop::split_at(const Point &point, bool prefer_non_overhang)
{
if (this->paths.empty()) return;
if (this->paths.empty())
return;
// find the closest path and closest point belonging to that path
// Find the closest path and closest point belonging to that path. Avoid overhangs, if asked for.
size_t path_idx = 0;
Point p = this->paths.front().first_point();
double min = point.distance_to(p);
for (ExtrusionPaths::const_iterator path = this->paths.begin(); path != this->paths.end(); ++path) {
Point p_tmp = point.projection_onto(path->polyline);
double dist = point.distance_to(p_tmp);
if (dist < min) {
p = p_tmp;
min = dist;
path_idx = path - this->paths.begin();
Point p;
{
double min = std::numeric_limits<double>::max();
Point p_non_overhang;
size_t path_idx_non_overhang = 0;
double min_non_overhang = std::numeric_limits<double>::max();
for (ExtrusionPaths::const_iterator path = this->paths.begin(); path != this->paths.end(); ++path) {
Point p_tmp = point.projection_onto(path->polyline);
double dist = point.distance_to(p_tmp);
if (dist < min) {
p = p_tmp;
min = dist;
path_idx = path - this->paths.begin();
}
if (prefer_non_overhang && ! path->is_bridge() && dist < min_non_overhang) {
p_non_overhang = p_tmp;
min_non_overhang = dist;
path_idx_non_overhang = path - this->paths.begin();
}
}
if (prefer_non_overhang && min_non_overhang != std::numeric_limits<double>::max()) {
// Only apply the non-overhang point if there is one.
path_idx = path_idx_non_overhang;
p = p_non_overhang;
}
}