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ENH: avoid overhang area when set the seam position

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Signed-off-by: qing.zhang <qing.zhang@bambulab.com>
Change-Id: I58eb8c091b68b8c64f44d21db88d2f9155e42e42
This commit is contained in:
qing.zhang 2022-12-27 19:33:29 +08:00 • committed by Lane.Wei
parent 38406e3e59
commit 3a6f033794
2 changed files with 44 additions and 5 deletions
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48
src/libslic3r/GCode/SeamPlacer.cpp
View file

@ -697,8 +697,8 @@ struct SeamComparator
}
// the penalites are kept close to range [0-1.x] however, it should not be relied upon
float penalty_a = a.overhang + a.visibility + angle_importance * compute_angle_penalty(a.local_ccw_angle) + distance_penalty_a;
float penalty_b = b.overhang + b.visibility + angle_importance * compute_angle_penalty(b.local_ccw_angle) + distance_penalty_b;
float penalty_a = a.overhang + a.visibility + a.extend_overhang + angle_importance * compute_angle_penalty(a.local_ccw_angle) + distance_penalty_a;
float penalty_b = b.overhang + b.visibility + b.extend_overhang + angle_importance * compute_angle_penalty(b.local_ccw_angle) + distance_penalty_b;
return penalty_a < penalty_b;
}
@ -731,8 +731,8 @@ struct SeamComparator
if (setup == SeamPosition::spRear) { return a.position.y() + SeamPlacer::seam_align_score_tolerance * 5.0f > b.position.y(); }
float penalty_a = a.overhang + a.visibility + angle_importance * compute_angle_penalty(a.local_ccw_angle);
float penalty_b = b.overhang + b.visibility + angle_importance * compute_angle_penalty(b.local_ccw_angle);
float penalty_a = a.overhang + a.extend_overhang + a.visibility + angle_importance * compute_angle_penalty(a.local_ccw_angle);
float penalty_b = b.overhang + b.extend_overhang + b.visibility + angle_importance * compute_angle_penalty(b.local_ccw_angle);
return penalty_a <= penalty_b || penalty_a - penalty_b < SeamPlacer::seam_align_score_tolerance;
}
@ -968,12 +968,50 @@ void SeamPlacer::calculate_overhangs_and_layer_embedding(const PrintObject *po)
bool should_compute_layer_embedding = regions_with_perimeter > 1;
std::unique_ptr<PerimeterDistancer> current_layer_distancer = std::make_unique<PerimeterDistancer>(po->layers()[layer_idx]);
for (SeamCandidate &perimeter_point : layers[layer_idx].points) {
int points_size = layers[layer_idx].points.size();
for (size_t i = 0; i < points_size; i++) {
SeamCandidate &perimeter_point = layers[layer_idx].points[i];
Vec2f point = Vec2f{perimeter_point.position.head<2>()};
if (prev_layer_distancer.get() != nullptr) {
perimeter_point.overhang = prev_layer_distancer->distance_from_perimeter(point) + 0.6f * perimeter_point.perimeter.flow_width -
tan(SeamPlacer::overhang_angle_threshold) * po->layers()[layer_idx]->height;
perimeter_point.overhang = perimeter_point.overhang < 0.0f ? 0.0f : perimeter_point.overhang;
if (perimeter_point.overhang > 0.0f) {
//BBS. extend overhang range
float dist = 0.0f;
size_t idx = i;
size_t start_index = layers[layer_idx].points[i].perimeter.start_index;
size_t end_index = layers[layer_idx].points[i].perimeter.end_index;
float lensLimit = 3.0f;
bool flage = true;
layers[layer_idx].points[i].extend_overhang += gauss(0.0f, 0.0f, 1.0f, 0.005f);
while (idx != i || flage) {
flage = false;
int prev = idx;
idx = idx == start_index ? end_index - 1 : idx - 1;
dist += sqrt((layers[layer_idx].points[idx].position.head<2>() - layers[layer_idx].points[prev].position.head<2>()).squaredNorm());
if (dist > lensLimit)
break;
else
layers[layer_idx].points[idx].extend_overhang += gauss(dist, 0.0f, 1.0f, 0.005f);
}
idx = i;
dist = 0.0f;
flage = true;
while (idx != i || flage) {
flage = false;
int prev = idx;
idx = idx == end_index - 1 ? start_index : idx + 1;
dist += sqrt((layers[layer_idx].points[idx].position.head<2>() - layers[layer_idx].points[prev].position.head<2>()).squaredNorm());
if (dist > lensLimit)
break;
else
layers[layer_idx].points[idx].extend_overhang += gauss(dist, 0.0f, 1.0f, 0.005f);
}
}
}
if (should_compute_layer_embedding) { // search for embedded perimeter points (points hidden inside the print ,e.g. multimaterial join, best position for seam)

1
src/libslic3r/GCode/SeamPlacer.hpp
View file

@ -76,6 +76,7 @@ struct SeamCandidate
Perimeter &perimeter;
float visibility;
float overhang;
float extend_overhang=0.0f;
// distance inside the merged layer regions, for detecting perimeter points which are hidden indside the print (e.g. multimaterial join)
// Negative sign means inside the print, comes from EdgeGrid structure
float embedded_distance;