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thin_wall bugfix & improvements

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This commit is contained in:
supermerill 2018-12-10 17:41:58 +01:00
parent 301d52a072
commit 792627a95d
2 changed files with 39 additions and 13 deletions
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49
xs/src/libslic3r/MedialAxis.cpp
View File

@ -301,13 +301,14 @@ remove_point_too_near(ThickPolyline* to_reduce)
to_reduce->points.erase(to_reduce->points.begin() + id);
to_reduce->width.erase(to_reduce->width.begin() + id);
newdist = to_reduce->points[id].distance_to(to_reduce->points[id - 1]);
//if you removed a point, it check if the next one isn't too near from the previous one.
// if not, it bypass it.
if (newdist > smallest) {
++id;
}
}
//go to next one
//if you removed a point, it check if the next one isn't too near from the previous one.
// if not, it byepass it.
if (newdist > smallest) {
++id;
}
else ++id;
}
}
@ -620,20 +621,33 @@ MedialAxis::extends_line(ThickPolyline& polyline, const ExPolygons& anchors, con
line.a = *(polyline.points.begin() + first_idx);
}
// prevent the line from touching on the other side, otherwise intersection() might return that solution
if (polyline.points.size() == 2) line.a = line.midpoint();
if (polyline.points.size() == 2 && this->expolygon.contains(line.midpoint())) line.a = line.midpoint();
line.extend_end(max_width);
Point new_back;
if (this->expolygon.contour.has_boundary_point(polyline.points.back())) {
new_back = polyline.points.back();
} else {
//TODO: verify also for holes.
(void)this->expolygon.contour.first_intersection(line, &new_back);
bool finded = this->expolygon.contour.first_intersection(line, &new_back);
//verify also for holes.
Point new_back_temp;
for (Polygon hole : this->expolygon.holes) {
if (hole.first_intersection(line, &new_back_temp)) {
if (!finded || line.a.distance_to(new_back_temp) < line.a.distance_to(new_back)) {
finded = true;
new_back = new_back_temp;
}
}
}
// safety check if no intersection
if (new_back.x == 0 && new_back.y == 0) {
if (!finded) {
if (!this->expolygon.contains(line.b)) {
//it's outside!!!
std::cout << "Error, a line is formed that start in a polygon, end outside of it can don't cross it!\n";
if (!this->expolygon.contains(line.a)) {
std::cout << "Error, a line is formed that start outside a polygon, end outside of it and don't cross it!\n";
} else {
std::cout << "Error, a line is formed that start in a polygon, end outside of it and don't cross it!\n";
}
}
new_back = line.b;
}
@ -641,10 +655,19 @@ MedialAxis::extends_line(ThickPolyline& polyline, const ExPolygons& anchors, con
polyline.width.push_back(polyline.width.back());
}
Point new_bound;
//TODO: verify also for holes.
(void)bounds.contour.first_intersection(line, &new_bound);
bool finded = bounds.contour.first_intersection(line, &new_bound);
//verify also for holes.
Point new_bound_temp;
for (Polygon hole : bounds.holes) {
if (hole.first_intersection(line, &new_bound_temp)) {
if (!finded || line.a.distance_to(new_bound_temp) < line.a.distance_to(new_bound)) {
finded = true;
new_bound = new_bound_temp;
}
}
}
// safety check if no intersection
if (new_bound.x == 0 && new_bound.y == 0) {
if (!finded) {
if (line.b.coincides_with_epsilon(polyline.points.back())) {
return;
}

3
xs/src/libslic3r/PerimeterGenerator.cpp
View File

@ -282,6 +282,7 @@ void PerimeterGenerator::process()
no_thin_zone = diff_ex(last, offset_ex(half_thins, (float)(min_width / 2) - SCALED_EPSILON), true);
}
// compute a bit of overlap to anchor thin walls inside the print.
ExPolygons thin_zones_extruded;
for (ExPolygon &half_thin : half_thins) {
//growing back the polygon
ExPolygons thin = offset_ex(half_thin, (float)(min_width / 2));
@ -298,11 +299,13 @@ void PerimeterGenerator::process()
// the maximum thickness of our thin wall area is equal to the minimum thickness of a single loop
thin[0].medial_axis(bound, ext_perimeter_width + ext_perimeter_spacing2, min_width,
&thin_walls, this->layer_height);
thin_zones_extruded.emplace_back(thin[0]);
}
break;
}
}
}
next_onion = diff_ex(offset_ex(last, -(float)(ext_perimeter_width / 2)), thin_zones_extruded, true);
}
} else {
//FIXME Is this offset correct if the line width of the inner perimeters differs