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ENH: optimize support top intface fill direction

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Optimize support top interface fill direction for bridge.
The direction is set orthogonal to the biggest bridges's infill
direction.
Currently, it only works when thick bridge is off.

Signed-off-by: yifan.wu <yifan.wu@bambulab.com>
Change-Id: I7bd894ae6f5ae24bc597c609e27a16b6d45a9797
This commit is contained in:
yifan.wu 2022-07-20 21:33:15 +08:00 • committed by Lane.Wei
parent 3c1f7f9e16
commit f97261bca9
1 changed files with 50 additions and 0 deletions
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50
src/libslic3r/SupportMaterial.cpp
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@ -4642,6 +4642,40 @@ void PrintObjectSupportMaterial::generate_toolpaths(
}
#endif
// Calculate top interface angle
float angle_of_biggest_bridge = -1.f;
do
{
// Currently only works when thick_bridges is off
if (m_object->config().thick_bridges)
break;
coordf_t object_layer_bottom_z = support_layer.print_z + m_slicing_params.gap_support_object;
const Layer* object_layer = m_object->get_layer_at_bottomz(object_layer_bottom_z, 10.0 * EPSILON);
if (object_layer == nullptr)
break;
if (object_layer != nullptr) {
float biggest_bridge_area = 0.f;
const Polygons& top_contact_polys = top_contact_layer.polygons_to_extrude();
for (auto layerm : object_layer->regions()) {
for (auto bridge_surface : layerm->fill_surfaces.filter_by_type(stBottomBridge)) {
float bs_area = bridge_surface->area();
if (bs_area <= biggest_bridge_area || bridge_surface->bridge_angle < 0.f)
continue;
angle_of_biggest_bridge = bridge_surface->bridge_angle;
biggest_bridge_area = bs_area;
}
}
}
} while (0);
auto calc_included_angle_degree = [](int degree_a, int degree_b) {
int iad = std::abs(degree_b - degree_a);
return std::min(iad, 180 - iad);
};
// Top and bottom contacts, interface layers.
for (size_t i = 0; i < 3; ++ i) {
MyLayerExtruded &layer_ex = (i == 0) ? top_contact_layer : (i == 1 ? bottom_contact_layer : interface_layer);
@ -4664,6 +4698,22 @@ void PrintObjectSupportMaterial::generate_toolpaths(
// Use interface angle for the interface layers.
m_support_params.interface_angle + interface_angle_delta;
// BBS
bool can_adjust_top_interface_angle = (m_object_config->support_interface_top_layers.value > 1 && &layer_ex == &top_contact_layer);
if (can_adjust_top_interface_angle && angle_of_biggest_bridge >= 0.f) {
int bridge_degree = (int)Geometry::rad2deg(angle_of_biggest_bridge);
int support_intf_degree = (int)Geometry::rad2deg(filler_interface->angle);
int max_included_degree = 0;
int step = 90;
for (int add_on_degree = 0; add_on_degree < 180; add_on_degree += step) {
int degree_to_try = support_intf_degree + add_on_degree;
int included_degree = calc_included_angle_degree(bridge_degree, degree_to_try);
if (included_degree > max_included_degree) {
max_included_degree = included_degree;
filler_interface->angle = Geometry::deg2rad((float)degree_to_try);
}
}
}
double density = interface_as_base ? m_support_params.support_density : m_support_params.interface_density;
filler_interface->spacing = interface_as_base ? m_support_params.support_material_flow.spacing() : m_support_params.support_material_interface_flow.spacing();
filler_interface->link_max_length = coord_t(scale_(filler_interface->spacing * link_max_length_factor / density));