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FIX: tree support floating branches 

Change-Id: Id28324e7676b28a315b03055d941b9876b2b3b5b
(cherry picked from commit 8b5d3fae4a476b91caf854cc75d5de36ff984790)
This commit is contained in:
Arthur 2022-09-23 20:55:29 +08:00 committed by Lane.Wei
parent 2ee113b9da
commit fae9036f01
1 changed files with 24 additions and 56 deletions
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80
src/libslic3r/TreeSupport.cpp
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@ -1822,6 +1822,24 @@ inline coordf_t calc_branch_radius(coordf_t base_radius, size_t layers_to_top, s
return radius;
}
ExPolygons avoid_object_remove_extra_small_parts(ExPolygons &expolys, const ExPolygons &avoid_region) {
ExPolygons expolys_out;
for (auto expoly : expolys) {
auto expolys_avoid = diff_ex(expoly, avoid_region);
int idx_max_area = -1;
float max_area = 0;
for (int i = 0; i < expolys_avoid.size(); ++i) {
auto a = expolys_avoid[i].area();
if (a > max_area) {
max_area = a;
idx_max_area = i;
}
}
if (idx_max_area >= 0) expolys_out.emplace_back(std::move(expolys_avoid[idx_max_area]));
}
return expolys_out;
}
void TreeSupport::draw_circles(const std::vector<std::vector<Node*>>& contact_nodes)
{
const PrintObjectConfig &config = m_object->config();
@ -1898,7 +1916,6 @@ void TreeSupport::draw_circles(const std::vector<std::vector<Node*>>& contact_no
//Draw the support areas and add the roofs appropriately to the support roof instead of normal areas.
ts_layer->lslices.reserve(contact_nodes[layer_nr].size());
#if 1
for (const Node* p_node : contact_nodes[layer_nr])
{
if (print->canceled())
@ -1949,59 +1966,7 @@ void TreeSupport::draw_circles(const std::vector<std::vector<Node*>>& contact_no
if (layer_nr < brim_skirt_layers)
ts_layer->lslices.emplace_back(area);
}
#else
// some nodes may not have radius set
for (Node* p_node : contact_nodes[layer_nr])
{
size_t layers_to_top = p_node->distance_to_top;// std::min(node.distance_to_top, (size_t)300);
double scale = static_cast<double>(layers_to_top + 1) / tip_layers;
scale = layers_to_top < tip_layers ? (0.5 + scale / 2) : (1 + static_cast<double>(layers_to_top - tip_layers) * diameter_angle_scale_factor);
p_node->radius = scale * branch_radius;
}
{
// now this method is extremely slow. Need to optimize the speed before we can use it.
Polygons layer_contours = std::move(m_ts_data->get_contours_with_holes(layer_nr));
std::vector<double> radiis;
std::vector<bool> is_interface;
//Polygons lines = spanning_tree_to_polygon(m_spanning_trees[layer_nr], layer_contours, layer_nr, radiis);
Polygons lines = contact_nodes_to_polygon(contact_nodes[layer_nr], layer_contours, layer_nr, radiis, is_interface);
for (int k = 0; k < lines.size(); k++) {
auto line = lines[k];
double radius = radiis[k];
Polygons line_expanded;
if (line.size() == 1)
{
Polygon circle;
double scale = radiis[k] / branch_radius;
for (auto iter = branch_circle.points.begin(); iter != branch_circle.points.end(); iter++)
{
Point corner = (*iter) * scale;
circle.append(line.first_point() + corner);
}
line_expanded.emplace_back(circle);
}
else {
line_expanded = offset(line, scale_(radius), jtRound, scale_(g_config_tree_support_collision_resolution));
}
if (line_expanded.empty())
continue;
if (is_interface[k])
roof_areas.emplace_back(line_expanded[0]);
else
base_areas.emplace_back(line_expanded[0]);
if (layer_nr < brim_skirt_layers)
ts_layer->lslices.emplace_back(line_expanded[0]);
//if (radius > config.support_base_pattern_spacing * 2)
// ts_layer->need_infill = true;
}
#ifdef SUPPORT_TREE_DEBUG_TO_SVG
draw_contours_and_nodes_to_svg( layer_nr, base_areas, to_expolygons(lines), m_ts_data->m_layer_outlines_below[layer_nr], {}, {}, "circles", { "lines","base_areas","outlines" });
#endif
}
#endif
ts_layer->lslices = std::move(union_ex(ts_layer->lslices));
//Must update bounding box which is used in avoid crossing perimeter
@ -2020,15 +1985,18 @@ void TreeSupport::draw_circles(const std::vector<std::vector<Node*>>& contact_no
// avoid object
auto avoid_region_interface = m_ts_data->get_collision(m_ts_data->m_xy_distance, layer_nr);
roof_areas = std::move(diff_ex(roof_areas, avoid_region_interface));
roof_1st_layer = std::move(diff_ex(roof_1st_layer, avoid_region_interface));
//roof_areas = std::move(diff_ex(roof_areas, avoid_region_interface));
//roof_1st_layer = std::move(diff_ex(roof_1st_layer, avoid_region_interface));
roof_areas = avoid_object_remove_extra_small_parts(roof_areas, avoid_region_interface);
roof_1st_layer = avoid_object_remove_extra_small_parts(roof_1st_layer, avoid_region_interface);
// roof_1st_layer and roof_areas may intersect, so need to subtract roof_areas from roof_1st_layer
roof_1st_layer = std::move(diff_ex(roof_1st_layer, roof_areas));
// let supports touch objects when brim is on
auto avoid_region = m_ts_data->get_collision((layer_nr == 0 && has_brim) ? config.brim_object_gap : m_ts_data->m_xy_distance, layer_nr);
base_areas = std::move(diff_ex(base_areas, avoid_region));
// base_areas = std::move(diff_ex(base_areas, avoid_region));
base_areas = avoid_object_remove_extra_small_parts(base_areas, avoid_region);
base_areas = std::move(diff_ex(base_areas, roof_areas));
base_areas = std::move(diff_ex(base_areas, roof_1st_layer));