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FIX: Bugfix for zero-width tree supports from @scottmudge (#1367)

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fix bug with zero width tree supports throwing exception.

This a PR from @scottmudge commited to OrcaSlicer.

More than the original commit, we also unify the usage of line_width and
support_extrusion_width, making things simpler.

Change-Id: I0b7a4344cbda4fdf05dfd9f8965f598ad6844429
(cherry picked from commit 4a7c4d4a0cc4507e7eadfb1825b1fd11bf0aba52)
This commit is contained in:
Scott Mudge 2023-06-25 01:38:29 -04:00 • committed by lane.wei
parent 9984fb2c3f
commit 6cf56467d3
1 changed files with 8 additions and 4 deletions
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12
src/libslic3r/TreeSupport.cpp
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@ -688,6 +688,11 @@ TreeSupport::TreeSupport(PrintObject& object, const SlicingParameters &slicing_p
ipConcentric :
(m_support_params.interface_density > 0.95 ? ipRectilinear : ipSupportBase);
m_support_params.support_extrusion_width = m_object_config->support_line_width.value > 0 ? m_object_config->support_line_width : m_object_config->line_width;
// Check if set to zero, use default if so.
if (m_support_params.support_extrusion_width <= 0.0) {
const auto nozzle_diameter = object.print()->config().nozzle_diameter.get_at(object.config().support_interface_filament - 1);
m_support_params.support_extrusion_width = Flow::auto_extrusion_width(FlowRole::frSupportMaterial, (float)nozzle_diameter);
}
is_slim = is_tree_slim(support_type, support_style);
is_strong = is_tree(support_type) && support_style == smsTreeStrong;
MAX_BRANCH_RADIUS = 10.0;
@ -2106,11 +2111,10 @@ void TreeSupport::draw_circles(const std::vector<std::vector<Node*>>& contact_no
const size_t top_interface_layers = config.support_interface_top_layers.value;
const size_t bottom_interface_layers = config.support_interface_bottom_layers.value;
const double diameter_angle_scale_factor = tan(tree_support_branch_diameter_angle * M_PI / 180.);// * layer_height / branch_radius; //Scale factor per layer to produce the desired angle.
const coordf_t line_width = config.support_line_width;
const coordf_t line_width_scaled = scale_(line_width);
const bool with_lightning_infill = m_support_params.base_fill_pattern == ipLightning;
coordf_t support_extrusion_width = m_support_params.support_extrusion_width;
const coordf_t line_width_scaled = scale_(support_extrusion_width);
const float tree_brim_width = config.tree_support_brim_width.value;
const PrintObjectConfig& object_config = m_object->config();
@ -2286,7 +2290,7 @@ void TreeSupport::draw_circles(const std::vector<std::vector<Node*>>& contact_no
if (SQUARE_SUPPORT) {
// simplify support contours
ExPolygons base_areas_simplified;
for (auto &area : base_areas) { area.simplify(scale_(line_width / 2), &base_areas_simplified); }
for (auto &area : base_areas) { area.simplify(scale_(support_extrusion_width / 2), &base_areas_simplified); }
base_areas = std::move(base_areas_simplified);
}
//Subtract support floors. We can only compute floor_areas here instead of with roof_areas,
@ -2578,7 +2582,7 @@ void TreeSupport::drop_nodes(std::vector<std::vector<Node*>>& contact_nodes)
if (angle > 30.0 && node->radius > MIN_BRANCH_RADIUS)
angle = (node->radius - MIN_BRANCH_RADIUS) / (MAX_BRANCH_RADIUS - MIN_BRANCH_RADIUS) * (config.tree_support_branch_angle.value - 30.0) + 30.0;
double tan_angle = tan(angle * M_PI / 180);
int wall_count_ = node->radius > 2 * config.support_line_width ? wall_count : 1;
int wall_count_ = node->radius > 2 * support_extrusion_width ? wall_count : 1;
node->max_move_dist = (angle < 90) ? (coordf_t) (tan_angle * node->height) * wall_count_ : std::numeric_limits<coordf_t>::max();
node->max_move_dist = std::min(node->max_move_dist, support_extrusion_width);
move_dist = node->max_move_dist;