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FIX: sharp tail detection may fail

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1. In small overhang detection, some sharp tail cases are missed because
  the max_layer was not compared.
2. In normal support, previously the lower layer's expolys were not right,
  should only keep the ones that won't vanish when extruding.

Jira: STUDIO-1977, STUDIO-2200
Change-Id: Ia09ff1ab4870b7e3c199a827932536867644c76c
(cherry picked from commit e3ba3a3114821e951d6eb00b4c95e6e63ffe00d4)
This commit is contained in:
Arthur 2023-03-06 18:23:15 +08:00 • committed by Lane.Wei
parent dce7751750
commit 017707e575
3 changed files with 27 additions and 12 deletions
Download patch file Download diff file Expand all files Collapse all files

5
src/libslic3r/SVG.cpp
View file

@ -279,13 +279,14 @@ std::string SVG::get_path_d(const ClipperLib::Path &path, double scale, bool clo
return d.str();
}
// font_size: font-size={font_size*10}px
void SVG::draw_text(const Point &pt, const char *text, const char *color, int font_size)
{
fprintf(this->f,
"<text x=\"%f\" y=\"%f\" font-family=\"sans-serif\" font-size=\"20px\" fill=\"%s\">%s</text>",
"<text x=\"%f\" y=\"%f\" font-family=\"sans-serif\" font-size=\"%dpx\" fill=\"%s\">%s</text>",
to_svg_x(pt(0)-origin(0)),
to_svg_y(pt(1)-origin(1)),
color, text);
font_size*10, color, text);
}
void SVG::draw_legend(const Point &pt, const char *text, const char *color)

14
src/libslic3r/SupportMaterial.cpp
View file

@ -1535,7 +1535,17 @@ static inline Polygons detect_overhangs(
// Generate overhang / contact_polygons for non-raft layers.
const Layer &lower_layer = *layer.lower_layer;
const bool has_enforcer = !annotations.enforcers_layers.empty() && !annotations.enforcers_layers[layer_id].empty();
const ExPolygons& lower_layer_expolys = lower_layer.lslices;
// Can't directly use lower_layer.lslices, or we'll miss some very sharp tails.
// Filter out areas whose diameter that is smaller than extrusion_width. Do not use offset2() for this purpose!
// FIXME if there are multiple regions with different extrusion width, the following code may not be right.
float fw = float(layer.regions().front()->flow(frExternalPerimeter).scaled_width());
ExPolygons lower_layer_expolys;
for (const ExPolygon& expoly : lower_layer.lslices) {
if (!offset_ex(expoly, -fw / 2).empty()) {
lower_layer_expolys.emplace_back(expoly);
}
}
const ExPolygons& lower_layer_sharptails = lower_layer.sharp_tails;
auto& lower_layer_sharptails_height = lower_layer.sharp_tails_height;
@ -2265,7 +2275,7 @@ PrintObjectSupportMaterial::MyLayersPtr PrintObjectSupportMaterial::top_contact_
// 3. check whether the small overhang is sharp tail
bool is_sharp_tail = false;
for (size_t layer_id = cluster.min_layer; layer_id < cluster.max_layer; layer_id++) {
for (size_t layer_id = cluster.min_layer; layer_id <= cluster.max_layer; layer_id++) {
const Layer& layer = *object.layers()[layer_id];
if (!intersection_ex(layer.sharp_tails, cluster.merged_overhangs_dilated).empty()) {
is_sharp_tail = true;

20
src/libslic3r/TreeSupport.cpp
View file

@ -237,11 +237,15 @@ static void draw_contours_and_nodes_to_svg
svg.draw_outline(outlines_below, colors[2]);
// draw legend
svg.draw_text(bbox.min + Point(scale_(0), scale_(0)), ("nPoints: "+std::to_string(layer_nodes.size())+"->").c_str(), "green", 4);
svg.draw_text(bbox.min + Point(scale_(15), scale_(0)), std::to_string(lower_layer_nodes.size()).c_str(), "black", 4);
svg.draw_text(bbox.min + Point(scale_(0), scale_(1)), legends[0].c_str(), colors[0].c_str(), 4);
svg.draw_text(bbox.min + Point(scale_(0), scale_(2)), legends[1].c_str(), colors[1].c_str(), 4);
svg.draw_text(bbox.min + Point(scale_(0), scale_(3)), legends[2].c_str(), colors[2].c_str(), 4);
if (!lower_layer_nodes.empty()) {
svg.draw_text(bbox.min + Point(scale_(0), scale_(0)), format("nPoints: %1%->%2%",layer_nodes.size(), lower_layer_nodes.size()).c_str(), "green", 2);
}
else {
svg.draw_text(bbox.min + Point(scale_(0), scale_(0)), ("nPoints: " + std::to_string(layer_nodes.size())).c_str(), "green", 2);
}
svg.draw_text(bbox.min + Point(scale_(0), scale_(2)), legends[0].c_str(), colors[0].c_str(), 2);
svg.draw_text(bbox.min + Point(scale_(0), scale_(4)), legends[1].c_str(), colors[1].c_str(), 2);
svg.draw_text(bbox.min + Point(scale_(0), scale_(6)), legends[2].c_str(), colors[2].c_str(), 2);
// draw layer nodes
svg.draw(layer_pts, "green", coord_t(scale_(0.1)));
@ -874,13 +878,13 @@ void TreeSupport::detect_overhangs()
coordf_t lower_layer_offset = layer_nr < enforce_support_layers ? -0.15 * extrusion_width : (float)lower_layer->height / tan(threshold_rad);
coordf_t support_offset_scaled = scale_(lower_layer_offset);
// Filter out areas whose diameter that is smaller than extrusion_width. Do not use offset2() for this purpose!
ExPolygons lower_polys;// = offset2_ex(lower_layer->lslices, -extrusion_width_scaled / 2, extrusion_width_scaled / 2);
ExPolygons lower_polys;
for (const ExPolygon& expoly : lower_layer->lslices) {
if (!offset_ex(expoly, -extrusion_width_scaled / 2).empty()) {
lower_polys.emplace_back(expoly);
}
}
ExPolygons curr_polys;// = offset2_ex(layer->lslices, -extrusion_width_scaled / 2, extrusion_width_scaled / 2);
ExPolygons curr_polys;
for (const ExPolygon& expoly : layer->lslices) {
if (!offset_ex(expoly, -extrusion_width_scaled / 2).empty()) {
curr_polys.emplace_back(expoly);
@ -1127,7 +1131,7 @@ void TreeSupport::detect_overhangs()
// 3. check whether the small overhang is sharp tail
bool is_sharp_tail = false;
for (size_t layer_id = cluster.min_layer; layer_id < cluster.max_layer; layer_id++) {
for (size_t layer_id = cluster.min_layer; layer_id <= cluster.max_layer; layer_id++) {
Layer* layer = m_object->get_layer(layer_id);
if (!intersection_ex(layer->sharp_tails, cluster.merged_poly).empty()) {
is_sharp_tail = true;