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ENH: optimize bridge detect to choose short direction

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For some corner case, the bridge detect may choose the long
distance rathan than the short distance.

Calculate the percentage of archored lines and choose
the shortest length

Signed-off-by: salt.wei <salt.wei@bambulab.com>
Change-Id: Ia74842f3135681373f649a014c270a1b9d1755e7
This commit is contained in:
salt.wei 2022-12-06 15:52:24 +08:00 • committed by Lane.Wei
parent 1c02449201
commit 14417bf176
2 changed files with 10 additions and 4 deletions
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9
src/libslic3r/BridgeDetector.cpp
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@ -122,6 +122,7 @@ bool BridgeDetector::detect_angle(double bridge_direction_override)
double max_length = 0;
{
Lines clipped_lines = intersection_ln(lines, clip_area);
size_t archored_line_num = 0;
for (size_t i = 0; i < clipped_lines.size(); ++i) {
const Line &line = clipped_lines[i];
if (expolygons_contain(this->_anchor_regions, line.a) && expolygons_contain(this->_anchor_regions, line.b)) {
@ -129,8 +130,12 @@ bool BridgeDetector::detect_angle(double bridge_direction_override)
double len = line.length();
total_length += len;
max_length = std::max(max_length, len);
archored_line_num++;
}
}
}
if (clipped_lines.size() > 0 && archored_line_num > 0) {
candidates[i_angle].archored_percent = (double)archored_line_num / (double)clipped_lines.size();
}
}
if (total_length == 0.)
continue;
@ -155,7 +160,7 @@ bool BridgeDetector::detect_angle(double bridge_direction_override)
// if any other direction is within extrusion width of coverage, prefer it if shorter
// TODO: There are two options here - within width of the angle with most coverage, or within width of the currently perferred?
size_t i_best = 0;
for (size_t i = 1; i < candidates.size() && candidates[i_best].coverage - candidates[i].coverage < this->spacing; ++ i)
for (size_t i = 1; i < candidates.size() && abs(candidates[i_best].archored_percent - candidates[i].archored_percent) < EPSILON; ++ i)
if (candidates[i].max_length < candidates[i_best].max_length)
i_best = i;