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WIP TreeSupports highly experimental: Add 2nd perimeter

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to thick tree supports for stability.
This commit is contained in:
Vojtech Bubnik 2022-10-13 14:43:03 +02:00
parent 842283cd3b
commit b6e1a7ed52
1 changed files with 31 additions and 13 deletions
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44
src/libslic3r/SupportMaterial.cpp
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@ -3238,6 +3238,20 @@ static inline void fill_expolygons_generate_paths(
fill_expolygons_generate_paths(dst, std::move(expolygons), filler, fill_params, density, role, flow);
}
static Polylines draw_perimeters(const ExPolygon &expoly, double clip_length)
{
// Draw the perimeters.
Polylines polylines;
polylines.reserve(expoly.holes.size() + 1);
for (size_t i = 0; i <= expoly.holes.size(); ++ i) {
Polyline pl(i == 0 ? expoly.contour.points : expoly.holes[i - 1].points);
pl.points.emplace_back(pl.points.front());
pl.clip_end(clip_length);
polylines.emplace_back(std::move(pl));
}
return polylines;
}
static inline void tree_supports_generate_paths(
ExtrusionEntitiesPtr &dst,
const Polygons &polygons,
@ -3336,7 +3350,20 @@ static inline void tree_supports_generate_paths(
const double clip_length = spacing * 0.15;
const double anchor_length = spacing * 6.;
ClipperLib_Z::Paths anchor_candidates;
for (ExPolygon &expoly : closing_ex(polygons, float(SCALED_EPSILON), float(SCALED_EPSILON + 0.5*flow.scaled_width()))) {
for (ExPolygon& expoly : closing_ex(polygons, float(SCALED_EPSILON), float(SCALED_EPSILON + 0.5 * flow.scaled_width()))) {
double area = expoly.area();
if (area > sqr(scaled<double>(5.))) {
// Make the tree branch stable by adding another perimeter.
ExPolygons level2 = offset2_ex({ expoly }, -1.5 * flow.scaled_width(), 0.5 * flow.scaled_width());
if (level2.size() == 1) {
Polylines polylines;
extrusion_entities_append_paths(dst, draw_perimeters(expoly, clip_length), erSupportMaterial, flow.mm3_per_mm(), flow.width(), flow.height(),
// Disable reversal of the path, always start with the anchor, always print CCW.
false);
expoly = level2.front();
}
}
// Try to produce one more perimeter to place the seam anchor.
// First genrate a 2nd perimeter loop as a source for anchor candidates.
// The anchor candidate points are annotated with an index of the source contour or with -1 if on intersection.
@ -3466,9 +3493,9 @@ static inline void fill_expolygons_with_sheath_generate_paths(
fill_params.density = density;
fill_params.dont_adjust = true;
double spacing = flow.scaled_spacing();
const double spacing = flow.scaled_spacing();
// Clip the sheath path to avoid the extruder to get exactly on the first point of the loop.
double clip_length = spacing * 0.15;
const double clip_length = spacing * 0.15;
for (ExPolygon &expoly : closing_ex(polygons, float(SCALED_EPSILON), float(SCALED_EPSILON + 0.5*flow.scaled_width()))) {
// Don't reorder the skirt and its infills.
@ -3478,16 +3505,7 @@ static inline void fill_expolygons_with_sheath_generate_paths(
eec->no_sort = true;
}
ExtrusionEntitiesPtr &out = no_sort ? eec->entities : dst;
// Draw the perimeters.
Polylines polylines;
polylines.reserve(expoly.holes.size() + 1);
for (size_t i = 0; i <= expoly.holes.size(); ++ i) {
Polyline pl(i == 0 ? expoly.contour.points : expoly.holes[i - 1].points);
pl.points.emplace_back(pl.points.front());
pl.clip_end(clip_length);
polylines.emplace_back(std::move(pl));
}
extrusion_entities_append_paths(out, polylines, erSupportMaterial, flow.mm3_per_mm(), flow.width(), flow.height());
extrusion_entities_append_paths(out, draw_perimeters(expoly, clip_length), erSupportMaterial, flow.mm3_per_mm(), flow.width(), flow.height());
// Fill in the rest.
fill_expolygons_generate_paths(out, offset_ex(expoly, float(-0.4 * spacing)), filler, fill_params, density, role, flow);
if (no_sort && ! eec->empty())