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FIX: useless expansion of top_interface && hybrid tree may collide with model 

1. only expand 2mm for BigFlat/ThinPlate overhangs, unnecessary for tree node overhangs without big areas.
2. avoid the situation that some overhangs are extended to fall on models when smoothing.

jira: STUDIO-10177
Change-Id: Icec0bb59627bb85332ad1435cbe29a07f57f922e
This commit is contained in:
jiaxi.chen 2025-01-24 12:01:45 +08:00 committed by lane.wei
parent e66a291235
commit 7745c29c51
1 changed files with 6 additions and 5 deletions
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11
src/libslic3r/Support/TreeSupport.cpp
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@ -3025,7 +3025,7 @@ void TreeSupport::drop_nodes()
smooth_filter(overhang.contour, 2, movements, max_move_distance / 2.);
for (auto &pt : overhang.contour.points) {
auto tmp = pt + movements.at(pt);
if (!is_inside_ex(to_expolygons({contour}), tmp))
if (!is_inside_ex(to_expolygons({contour}), tmp) && !is_inside_ex(m_ts_data->m_layer_outlines_below[obj_layer_nr], tmp))
pt = tmp;
}
}
@ -3741,14 +3741,14 @@ void TreeSupport::generate_contact_points()
const auto &overhang_type = overhang_with_type.second;
is_sharp_tail = overhang_type & OverhangType::SharpTail;
bool add_interface = (force_tip_to_roof || area(overhang_part) > minimum_roof_area);
const auto &relevant_forbidden = get_collision(0, layer_nr - 1);
ExPolygons overhangs{overhang_part};
if (add_interface && xy_expansion > EPSILON && !is_sharp_tail) {
const auto &relevant_forbidden = get_collision(0, layer_nr - 1);
overhangs = safe_offset_inc(overhangs, xy_expansion, relevant_forbidden, scale_(MIN_BRANCH_RADIUS * 1.75), 0, 1);
}
ExPolygons overhangs_regular;
if (m_support_params.support_style == smsTreeHybrid &&
(overhang_type & (BigFlat | ThinPlate))) {
if (add_interface && xy_expansion > EPSILON && !is_sharp_tail) {
overhangs = safe_offset_inc(overhangs, xy_expansion, relevant_forbidden, scale_(MIN_BRANCH_RADIUS * 1.75), 0, 1);
}
overhangs_regular = offset_ex(intersection_ex(overhangs, m_ts_data->m_layer_outlines_below[layer_nr - 1]), radius_scaled);
ExPolygons overhangs_normal = diff_ex(overhangs, overhangs_regular);
// if the outside area is still big, we can need normal nodes
@ -3766,6 +3766,7 @@ void TreeSupport::generate_contact_points()
}
}
else{
if (add_interface) overhangs = safe_offset_inc(overhangs, scale_(config.support_expansion.value), relevant_forbidden, scale_(MIN_BRANCH_RADIUS * 1.75), 0, 1);
overhangs_regular = overhangs;
}