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FIX: tree support detect overhang inaccurate 

Jira: STUDIO-3657
Change-Id: I1ef4ca3ec299b121eb467afc12acee68e0f12b39
(cherry picked from commit 36f8937ae0d0d79c7558662903fffef20b528cb8)
This commit is contained in:
Arthur 2023-09-14 14:11:12 +08:00 committed by Lane.Wei
parent 2bd6b11505
commit a631e6cb99
1 changed files with 2 additions and 8 deletions
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10
src/libslic3r/TreeSupport.cpp
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@ -875,20 +875,15 @@ void TreeSupport::detect_overhangs(bool detect_first_sharp_tail_only)
ExPolygons lower_layer_offseted = offset_ex(lower_polys, support_offset_scaled, SUPPORT_SURFACES_OFFSET_PARAMETERS); ExPolygons lower_layer_offseted = offset_ex(lower_polys, support_offset_scaled, SUPPORT_SURFACES_OFFSET_PARAMETERS);
ExPolygons overhang_areas = std::move(diff_ex(curr_polys, lower_layer_offseted)); ExPolygons overhang_areas = std::move(diff_ex(curr_polys, lower_layer_offseted));
overhang_areas.erase(std::remove_if(overhang_areas.begin(), overhang_areas.end(),
[extrusion_width_scaled](ExPolygon& area) { return offset_ex(area, -0.1 * extrusion_width_scaled).empty(); }),
overhang_areas.end());
if (is_auto(stype) && g_config_support_sharp_tails) if (is_auto(stype) && g_config_support_sharp_tails)
{ {
// BBS detect sharp tail // BBS detect sharp tail
for (const ExPolygon* expoly : curr_poly_ptrs) { for (const ExPolygon* expoly : curr_poly_ptrs) {
bool is_sharp_tail = false; bool is_sharp_tail = false;
// 1. nothing below // 1. nothing below
// this is a sharp tail region if it's small but non-ignorable // this is a sharp tail region if it's floating and non-ignorable
if (!overlaps(offset_ex(*expoly, 0.5 * extrusion_width_scaled), lower_polys)) { if (!overlaps(offset_ex(*expoly, 0.5 * extrusion_width_scaled), lower_polys)) {
is_sharp_tail = expoly->area() < area_thresh_well_supported && !offset_ex(*expoly, -0.1 * extrusion_width_scaled).empty(); is_sharp_tail = !offset_ex(*expoly, -0.1 * extrusion_width_scaled).empty();
} }
if (is_sharp_tail) { if (is_sharp_tail) {
@ -910,7 +905,6 @@ void TreeSupport::detect_overhangs(bool detect_first_sharp_tail_only)
SupportLayer* ts_layer = m_object->get_support_layer(layer_nr + m_raft_layers); SupportLayer* ts_layer = m_object->get_support_layer(layer_nr + m_raft_layers);
for (ExPolygon& poly : overhang_areas) { for (ExPolygon& poly : overhang_areas) {
if (offset_ex(poly, -0.1 * extrusion_width_scaled).empty()) continue;
ts_layer->overhang_areas.emplace_back(poly); ts_layer->overhang_areas.emplace_back(poly);
// check cantilever // check cantilever