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SLA supports - added parameters for the automatic generation (relative density measure and minimal distance of the points)

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This commit is contained in:
Lukas Matena 2019-02-19 16:34:52 +01:00
parent 1bb0af1588
commit eb0fd03861
9 changed files with 54 additions and 59 deletions
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25
src/libslic3r/PrintConfig.cpp
View file

@ -2630,28 +2630,19 @@ void PrintConfigDef::init_sla_params()
def->min = 0;
def->default_value = new ConfigOptionFloat(5.0);
def = this->add("support_density_at_horizontal", coInt);
def->label = L("Density on horizontal surfaces");
def = this->add("support_points_density_relative", coInt);
def->label = L("Support points density");
def->category = L("Supports");
def->tooltip = L("How many support points (approximately) should be placed on horizontal surface.");
def->sidetext = L("points per square dm");
def->tooltip = L("This is a relative measure of support points density.");
def->sidetext = L("%");
def->cli = "";
def->min = 0;
def->default_value = new ConfigOptionInt(500);
def->default_value = new ConfigOptionInt(100);
def = this->add("support_density_at_45", coInt);
def->label = L("Density on surfaces at 45 degrees");
def = this->add("support_points_minimal_distance", coFloat);
def->label = L("Minimal distance of the support points");
def->category = L("Supports");
def->tooltip = L("How many support points (approximately) should be placed on surface sloping at 45 degrees.");
def->sidetext = L("points per square dm");
def->cli = "";
def->min = 0;
def->default_value = new ConfigOptionInt(250);
def = this->add("support_minimal_z", coFloat);
def->label = L("Minimal support point height");
def->category = L("Supports");
def->tooltip = L("No support points will be placed lower than this value from the bottom.");
def->tooltip = L("No support points will be placed closer than this threshold.");
def->sidetext = L("mm");
def->cli = "";
def->min = 0;

10
src/libslic3r/PrintConfig.hpp
View file

@ -1002,9 +1002,8 @@ public:
ConfigOptionFloat support_object_elevation /*= 5.0*/;
/////// Following options influence automatic support points placement:
ConfigOptionInt support_density_at_horizontal;
ConfigOptionInt support_density_at_45;
ConfigOptionFloat support_minimal_z;
ConfigOptionInt support_points_density_relative;
ConfigOptionFloat support_points_minimal_distance;
// Now for the base pool (pad) /////////////////////////////////////////////
@ -1040,9 +1039,8 @@ protected:
OPT_PTR(support_base_height);
OPT_PTR(support_critical_angle);
OPT_PTR(support_max_bridge_length);
OPT_PTR(support_density_at_horizontal);
OPT_PTR(support_density_at_45);
OPT_PTR(support_minimal_z);
OPT_PTR(support_points_density_relative);
OPT_PTR(support_points_minimal_distance);
OPT_PTR(support_object_elevation);
OPT_PTR(pad_enable);
OPT_PTR(pad_wall_thickness);

18
src/libslic3r/SLA/SLAAutoSupports.cpp
View file

@ -230,7 +230,7 @@ void SLAAutoSupports::process(const std::vector<ExPolygons>& slices, const std::
// s.supports_force_inherited /= std::max(1.f, (layer_height / 0.3f) * e_area / s.area);
s.supports_force_inherited /= std::max(1.f, 0.17f * (s.overhangs_area) / s.area);
float force_deficit = s.support_force_deficit(m_config.tear_pressure);
float force_deficit = s.support_force_deficit(m_config.tear_pressure());
if (s.islands_below.empty()) // completely new island - needs support no doubt
uniformly_cover({ *s.polygon }, s, point_grid, true);
else if (! s.dangling_areas.empty()) {
@ -436,16 +436,16 @@ void SLAAutoSupports::uniformly_cover(const ExPolygons& islands, Structure& stru
{
//int num_of_points = std::max(1, (int)((island.area()*pow(SCALING_FACTOR, 2) * m_config.tear_pressure)/m_config.support_force));
const float support_force_deficit = structure.support_force_deficit(m_config.tear_pressure);
const float support_force_deficit = structure.support_force_deficit(m_config.tear_pressure());
if (support_force_deficit < 0)
return;
// Number of newly added points.
const size_t poisson_samples_target = size_t(ceil(support_force_deficit / m_config.support_force));
const size_t poisson_samples_target = size_t(ceil(support_force_deficit / m_config.support_force()));
const float density_horizontal = m_config.tear_pressure / m_config.support_force;
const float density_horizontal = m_config.tear_pressure() / m_config.support_force();
//FIXME why?
float poisson_radius = 1.f / (5.f * density_horizontal);
float poisson_radius = std::max(m_config.minimal_distance, 1.f / (5.f * density_horizontal));
// const float poisson_radius = 1.f / (15.f * density_horizontal);
const float samples_per_mm2 = 30.f / (float(M_PI) * poisson_radius * poisson_radius);
// Minimum distance between samples, in 3D space.
@ -462,13 +462,13 @@ void SLAAutoSupports::uniformly_cover(const ExPolygons& islands, Structure& stru
[&structure, &grid3d, min_spacing](const Vec2f &pos) {
return grid3d.collides_with(pos, &structure, min_spacing);
});
if (poisson_samples.size() >= poisson_samples_target)
if (poisson_samples.size() >= poisson_samples_target || m_config.minimal_distance > poisson_radius-EPSILON)
break;
float coeff = 0.5f;
if (poisson_samples.size() * 2 > poisson_samples_target)
coeff = float(poisson_samples.size()) / float(poisson_samples_target);
poisson_radius *= coeff;
min_spacing *= coeff;
poisson_radius = std::max(m_config.minimal_distance, poisson_radius * coeff);
min_spacing = std::max(m_config.minimal_distance, min_spacing * coeff);
}
#ifdef SLA_AUTOSUPPORTS_DEBUG
@ -491,7 +491,7 @@ void SLAAutoSupports::uniformly_cover(const ExPolygons& islands, Structure& stru
}
for (const Vec2f &pt : poisson_samples) {
m_output.emplace_back(float(pt(0)), float(pt(1)), structure.height, 0.2f, is_new_island);
structure.supports_force_this_layer += m_config.support_force;
structure.supports_force_this_layer += m_config.support_force();
grid3d.insert(pt, &structure);
}
}

10
src/libslic3r/SLA/SLAAutoSupports.hpp
View file

@ -14,13 +14,11 @@ namespace Slic3r {
class SLAAutoSupports {
public:
struct Config {
float density_at_horizontal;
float density_at_45;
float minimal_z;
float density_relative;
float minimal_distance;
///////////////
// float support_force = 30.f; // a force one point can support (arbitrary force unit)
float support_force = 10.f; // a force one point can support (arbitrary force unit)
float tear_pressure = 1.f; // pressure that the display exerts (the force unit per mm2)
inline float support_force() const { return 10.f / density_relative; } // a force one point can support (arbitrary force unit)
inline float tear_pressure() const { return 1.f; } // pressure that the display exerts (the force unit per mm2)
};
SLAAutoSupports(const TriangleMesh& mesh, const sla::EigenMesh3D& emesh, const std::vector<ExPolygons>& slices,

10
src/libslic3r/SLAPrint.cpp
View file

@ -532,9 +532,8 @@ void SLAPrint::process()
this->throw_if_canceled();
SLAAutoSupports::Config config;
const SLAPrintObjectConfig& cfg = po.config();
config.minimal_z = float(cfg.support_minimal_z);
config.density_at_45 = cfg.support_density_at_45 / 10000.f;
config.density_at_horizontal = cfg.support_density_at_horizontal / 10000.f;
config.density_relative = (float)cfg.support_points_density_relative / 100.f; // the config value is in percents
config.minimal_distance = cfg.support_points_minimal_distance;
// Construction of this object does the calculation.
this->throw_if_canceled();
@ -1064,7 +1063,10 @@ bool SLAPrintObject::invalidate_state_by_config_options(const std::vector<t_conf
for (const t_config_option_key &opt_key : opt_keys) {
if (opt_key == "layer_height") {
steps.emplace_back(slaposObjectSlice);
} else if (opt_key == "supports_enable") {
} else if (
opt_key == "supports_enable"
|| opt_key == "support_points_density_relative"
|| opt_key == "support_points_minimal_distance") {
steps.emplace_back(slaposSupportPoints);
} else if (
opt_key == "support_head_front_diameter"

28
src/slic3r/GUI/GLGizmo.cpp
View file

@ -2287,12 +2287,13 @@ RENDER_AGAIN:
}
}
else {
//m_imgui->text("Some settings could");
//m_imgui->text("be exposed here...");
m_imgui->text("");
m_imgui->text("");
m_imgui->text("");
/* ImGui::PushItemWidth(50.0f);
m_imgui->text(_(L("Minimal points distance: ")));
ImGui::SameLine();
bool value_changed = ImGui::InputDouble("mm", &m_minimal_point_distance, 0.0f, 0.0f, "%.2f");
m_imgui->text(_(L("Support points density: ")));
ImGui::SameLine();
value_changed |= ImGui::InputDouble("%", &m_density, 0.0f, 0.0f, "%.f");*/
bool generate = m_imgui->button(_(L("Auto-generate points")));
@ -2342,8 +2343,9 @@ RENDER_AGAIN:
force_refresh = true;
}
#endif
ImGui::SameLine();
bool editing_clicked = m_imgui->button("Editing");
m_imgui->text("");
m_imgui->text("");
bool editing_clicked = m_imgui->button(_(L("Manual editing")));
if (editing_clicked) {
editing_mode_reload_cache();
m_editing_mode = true;
@ -2463,9 +2465,13 @@ void GLGizmoSlaSupports::editing_mode_discard_changes()
void GLGizmoSlaSupports::editing_mode_apply_changes()
{
m_model_object->sla_support_points.clear();
for (const std::pair<sla::SupportPoint, bool>& point_and_selection : m_editing_mode_cache)
m_model_object->sla_support_points.push_back(point_and_selection.first);
// If there are no changes, don't touch the front-end. The data in the cache could have been
// taken from the backend and copying them to ModelObject would needlessly invalidate them.
if (m_unsaved_changes) {
m_model_object->sla_support_points.clear();
for (const std::pair<sla::SupportPoint, bool>& point_and_selection : m_editing_mode_cache)
m_model_object->sla_support_points.push_back(point_and_selection.first);
}
m_editing_mode = false;
m_unsaved_changes = false;
}

2
src/slic3r/GUI/GLGizmo.hpp
View file

@ -492,6 +492,8 @@ private:
bool m_lock_unique_islands = false;
bool m_editing_mode = false;
float m_new_point_head_diameter = 0.4f;
double m_minimal_point_distance = 20.;
double m_density = 100.;
std::vector<std::pair<sla::SupportPoint, bool>> m_editing_mode_cache; // a support point and whether it is currently selected
bool m_selection_rectangle_active = false;

5
src/slic3r/GUI/Preset.cpp
View file

@ -457,9 +457,8 @@ const std::vector<std::string>& Preset::sla_print_options()
"support_critical_angle",
"support_max_bridge_length",
"support_object_elevation",
"support_density_at_horizontal",
"support_density_at_45",
"support_minimal_z",
"support_points_density_relative",
"support_points_minimal_distance",
"pad_enable",
"pad_wall_thickness",
"pad_wall_height",

5
src/slic3r/GUI/Tab.cpp
View file

@ -3202,9 +3202,8 @@ void TabSLAPrint::build()
optgroup->append_single_option_line("support_max_bridge_length");
optgroup = page->new_optgroup(_(L("Automatic generation")));
optgroup->append_single_option_line("support_density_at_horizontal");
optgroup->append_single_option_line("support_density_at_45");
optgroup->append_single_option_line("support_minimal_z");
optgroup->append_single_option_line("support_points_density_relative");
optgroup->append_single_option_line("support_points_minimal_distance");
page = add_options_page(_(L("Pad")), "brick.png");
optgroup = page->new_optgroup(_(L("Pad")));