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ENH: new seam strategy from prusa2.5

Browse source 
As title. Thanks @Prusa

Signed-off-by: salt.wei <salt.wei@bambulab.com>
Change-Id: I2fa177e27ac53211952ea9b6c62e98182b8f05ce
This commit is contained in:
salt.wei 2022-08-18 14:17:02 +08:00 • committed by Lane.Wei
parent ce082f6e2a
commit d73142c2f9
23 changed files with 3105 additions and 1323 deletions
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72
src/libslic3r/ExtrusionEntity.cpp
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@ -158,11 +158,10 @@ double ExtrusionLoop::length() const
return len;
}
bool ExtrusionLoop::split_at_vertex(const Point &point)
bool ExtrusionLoop::split_at_vertex(const Point &point, const double scaled_epsilon)
{
for (ExtrusionPaths::iterator path = this->paths.begin(); path != this->paths.end(); ++path) {
int idx = path->polyline.find_point(point);
if (idx != -1) {
if (int idx = path->polyline.find_point(point, scaled_epsilon); idx != -1) {
if (this->paths.size() == 1) {
// just change the order of points
Polyline p1, p2;
@ -207,46 +206,57 @@ bool ExtrusionLoop::split_at_vertex(const Point &point)
return false;
}
std::pair<size_t, Point> ExtrusionLoop::get_closest_path_and_point(const Point& point, bool prefer_non_overhang) const
ExtrusionLoop::ClosestPathPoint ExtrusionLoop::get_closest_path_and_point(const Point &point, bool prefer_non_overhang) const
{
// Find the closest path and closest point belonging to that path. Avoid overhangs, if asked for.
size_t path_idx = 0;
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 (const ExtrusionPath& path : this->paths) {
Point p_tmp = point.projection_onto(path.polyline);
double dist = (p_tmp - point).cast<double>().norm();
if (dist < min) {
p = p_tmp;
min = dist;
path_idx = &path - &this->paths.front();
}
if (prefer_non_overhang && !is_bridge(path.role()) && dist < min_non_overhang) {
p_non_overhang = p_tmp;
min_non_overhang = dist;
path_idx_non_overhang = &path - &this->paths.front();
}
ClosestPathPoint out{0, 0};
double min2 = std::numeric_limits<double>::max();
ClosestPathPoint best_non_overhang{0, 0};
double min2_non_overhang = std::numeric_limits<double>::max();
for (const ExtrusionPath &path : this->paths) {
std::pair<int, Point> foot_pt_ = foot_pt(path.polyline.points, point);
double d2 = (foot_pt_.second - point).cast<double>().squaredNorm();
if (d2 < min2) {
out.foot_pt = foot_pt_.second;
out.path_idx = &path - &this->paths.front();
out.segment_idx = foot_pt_.first;
min2 = d2;
}
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;
if (prefer_non_overhang && !is_bridge(path.role()) && d2 < min2_non_overhang) {
best_non_overhang.foot_pt = foot_pt_.second;
best_non_overhang.path_idx = &path - &this->paths.front();
best_non_overhang.segment_idx = foot_pt_.first;
min2_non_overhang = d2;
}
}
return std::make_pair(path_idx, p);
if (prefer_non_overhang && min2_non_overhang != std::numeric_limits<double>::max())
// Only apply the non-overhang point if there is one.
out = best_non_overhang;
return out;
}
// 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)
void ExtrusionLoop::split_at(const Point &point, bool prefer_non_overhang, const double scaled_epsilon)
{
if (this->paths.empty())
return;
auto [path_idx, p] = get_closest_path_and_point(point, prefer_non_overhang);
auto [path_idx, segment_idx, p] = get_closest_path_and_point(point, prefer_non_overhang);
// Snap p to start or end of segment_idx if closer than scaled_epsilon.
{
const Point *p1 = this->paths[path_idx].polyline.points.data() + segment_idx;
const Point *p2 = p1;
++p2;
double d2_1 = (point - *p1).cast<double>().squaredNorm();
double d2_2 = (point - *p2).cast<double>().squaredNorm();
const double thr2 = scaled_epsilon * scaled_epsilon;
if (d2_1 < d2_2) {
if (d2_1 < thr2) p = *p1;
} else {
if (d2_2 < thr2) p = *p2;
}
}
// now split path_idx in two parts
const ExtrusionPath &path = this->paths[path_idx];