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When 'wipe on retract' on an external perimeter, continue to wipe inside the object

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supermerill/SuperSlicer#2061
This commit is contained in:
supermerill 2021-12-22 15:10:43 +01:00
parent 54ae8a55d0
commit 5b2cda2e9c
1 changed files with 51 additions and 2 deletions
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53
src/libslic3r/GCode.cpp
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@ -3339,12 +3339,16 @@ std::string GCode::extrude_loop(const ExtrusionLoop &original_loop, const std::s
Point current_point = paths.front().first_point();
Point next_point = paths.front().polyline.points[1]; // second point
gcode += ";" + GCodeProcessor::Wipe_Start_Tag + "\n";
//extra wipe before the little move.
if (EXTRUDER_CONFIG_WITH_DEFAULT(wipe_extra_perimeter, 0) > 0) {
coordf_t wipe_dist = scale_(EXTRUDER_CONFIG_WITH_DEFAULT(wipe_extra_perimeter,0));
ExtrusionPaths paths_wipe;
m_wipe.reset_path();
for (int i = 0; i < paths.size(); i++) {
ExtrusionPath& path = paths[i];
if (wipe_dist > 0) {
//first, we use the polyline for wipe_extra_perimeter
if (path.length() < wipe_dist) {
wipe_dist -= path.length();
paths_wipe.push_back(path);
@ -3363,7 +3367,13 @@ std::string GCode::extrude_loop(const ExtrusionLoop &original_loop, const std::s
} else {
next_point = paths[0].first_point();
}
break;
m_wipe.path.append(path.polyline);
m_wipe.path.clip_start(wipe_dist);
wipe_dist -= path.length();
}
} else {
//then, it's stored for the wipe on retract
m_wipe.path.append(path.polyline);
}
}
//move
@ -3399,7 +3409,7 @@ std::string GCode::extrude_loop(const ExtrusionLoop &original_loop, const std::s
Vec2d current_pos = current_point.cast<double>();
Vec2d next_pos = next_point.cast<double>();
Vec2d vec_dist = next_pos - current_pos;
double nd = scale_d(EXTRUDER_CONFIG_WITH_DEFAULT(nozzle_diameter,0));
const coordf_t nd = scale_d(EXTRUDER_CONFIG_WITH_DEFAULT(nozzle_diameter,0));
double l2 = vec_dist.squaredNorm();
// Shift by no more than a nozzle diameter.
//FIXME Hiding the seams will not work nicely for very densely discretized contours!
@ -3407,6 +3417,45 @@ std::string GCode::extrude_loop(const ExtrusionLoop &original_loop, const std::s
pt.rotate(angle, current_point);
// generate the travel move
gcode += m_writer.travel_to_xy(this->point_to_gcode(pt), 0.0, "move inwards before travel");
gcode += ";" + GCodeProcessor::Wipe_End_Tag + "\n";
// also shift the wipe on retract
if (m_wipe.enable) {
current_pos = pt.cast<double>();
//go to the inside (use clipper for easy shift)
Polygon original_polygon = original_loop.polygon();
Polygons polys = offset(original_polygon, (original_polygon.is_clockwise()?1:-1) * nd / 2);
//find nearest point
size_t best_poly_idx = 0;
size_t best_pt_idx = 0;
coordf_t best_sqr_dist = nd*nd*2;
for (size_t poly_idx = 0; poly_idx < polys.size(); poly_idx++) {
Polygon& poly = polys[poly_idx];
if (poly.is_clockwise() ^ original_polygon.is_clockwise())
poly.reverse();
for (size_t pt_idx = 0; pt_idx < poly.points.size(); pt_idx++) {
if (poly.points[pt_idx].distance_to_square(pt) < best_sqr_dist) {
best_sqr_dist = poly.points[pt_idx].distance_to_square(pt);
best_poly_idx = poly_idx;
best_pt_idx = pt_idx;
}
}
}
if (best_sqr_dist == nd * nd * 2) {
//can't find a path, use the old one
//BOOST_LOG_TRIVIAL(warning) << "Warn: can't find a proper path for wipe on retract. Layer " << m_layer_index << ", pos " << this->point_to_gcode(pt).x() << " : " << this->point_to_gcode(pt).y() << " !";
} else {
m_wipe.reset_path();
//get the points from here
Polygon& poly = polys[best_poly_idx];
for (size_t pt_idx = best_pt_idx; pt_idx < poly.points.size(); pt_idx++) {
m_wipe.path.append(poly.points[pt_idx]);
}
for (size_t pt_idx = 0; pt_idx < best_pt_idx; pt_idx++) {
m_wipe.path.append(poly.points[pt_idx]);
}
}
}
}
return gcode;