GitHub-Proxy/PrusaSlicer
1
0
Fork 0
mirror of https://git.mirrors.martin98.com/https://github.com/prusa3d/PrusaSlicer.git synced 2025-08-12 20:39:00 +08:00
Code Issues Actions Packages Projects Releases Wiki Activity

Move definitons to header in the SupportSpotsGenerator.

Browse Source 
Moving the definitions to a header file will enable testing the
functions involved.
This commit is contained in:
Martin Šach 2023-09-25 13:20:01 +02:00 committed by SachCZ
parent ea69deef24
commit 13579fff45
3 changed files with 290 additions and 236 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

434
src/libslic3r/SupportSpotsGenerator.cpp
View File

@ -55,43 +55,26 @@
#include "libslic3r/Color.hpp" #include "libslic3r/Color.hpp"
#endif #endif
namespace Slic3r { namespace Slic3r::SupportSpotsGenerator {
class ExtrusionLine ExtrusionLine::ExtrusionLine() : a(Vec2f::Zero()), b(Vec2f::Zero()), len(0.0), origin_entity(nullptr) {}
ExtrusionLine::ExtrusionLine(const Vec2f &a, const Vec2f &b, float len, const ExtrusionEntity *origin_entity)
: a(a), b(b), len(len), origin_entity(origin_entity)
{}
ExtrusionLine::ExtrusionLine(const Vec2f &a, const Vec2f &b)
: a(a), b(b), len((a-b).norm()), origin_entity(nullptr)
{}
bool ExtrusionLine::is_external_perimeter() const
{ {
public: assert(origin_entity != nullptr);
ExtrusionLine() : a(Vec2f::Zero()), b(Vec2f::Zero()), len(0.0), origin_entity(nullptr) {} return origin_entity->role().is_external_perimeter();
ExtrusionLine(const Vec2f &a, const Vec2f &b, float len, const ExtrusionEntity *origin_entity) }
: a(a), b(b), len(len), origin_entity(origin_entity)
{}
ExtrusionLine(const Vec2f &a, const Vec2f &b)
: a(a), b(b), len((a-b).norm()), origin_entity(nullptr)
{}
bool is_external_perimeter() const
{
assert(origin_entity != nullptr);
return origin_entity->role().is_external_perimeter();
}
Vec2f a;
Vec2f b;
float len;
const ExtrusionEntity *origin_entity;
std::optional<SupportSpotsGenerator::SupportPointCause> support_point_generated = {};
float form_quality = 1.0f;
float curled_up_height = 0.0f;
static const constexpr int Dim = 2;
using Scalar = Vec2f::Scalar;
};
auto get_a(ExtrusionLine &&l) { return l.a; } auto get_a(ExtrusionLine &&l) { return l.a; }
auto get_b(ExtrusionLine &&l) { return l.b; } auto get_b(ExtrusionLine &&l) { return l.b; }
namespace SupportSpotsGenerator {
using LD = AABBTreeLines::LinesDistancer<ExtrusionLine>; using LD = AABBTreeLines::LinesDistancer<ExtrusionLine>;
@ -151,33 +134,25 @@ public:
} }
}; };
struct SliceConnection void SliceConnection::add(const SliceConnection &other)
{ {
float area{}; this->area += other.area;
Vec3f centroid_accumulator = Vec3f::Zero(); this->centroid_accumulator += other.centroid_accumulator;
Vec2f second_moment_of_area_accumulator = Vec2f::Zero(); this->second_moment_of_area_accumulator += other.second_moment_of_area_accumulator;
float second_moment_of_area_covariance_accumulator{}; this->second_moment_of_area_covariance_accumulator += other.second_moment_of_area_covariance_accumulator;
}
void add(const SliceConnection &other) void SliceConnection::print_info(const std::string &tag) const
{ {
this->area += other.area; Vec3f centroid = centroid_accumulator / area;
this->centroid_accumulator += other.centroid_accumulator; Vec2f variance = (second_moment_of_area_accumulator / area - centroid.head<2>().cwiseProduct(centroid.head<2>()));
this->second_moment_of_area_accumulator += other.second_moment_of_area_accumulator; float covariance = second_moment_of_area_covariance_accumulator / area - centroid.x() * centroid.y();
this->second_moment_of_area_covariance_accumulator += other.second_moment_of_area_covariance_accumulator; std::cout << tag << std::endl;
} std::cout << "area: " << area << std::endl;
std::cout << "centroid: " << centroid.x() << " " << centroid.y() << " " << centroid.z() << std::endl;
void print_info(const std::string &tag) const std::cout << "variance: " << variance.x() << " " << variance.y() << std::endl;
{ std::cout << "covariance: " << covariance << std::endl;
Vec3f centroid = centroid_accumulator / area; }
Vec2f variance = (second_moment_of_area_accumulator / area - centroid.head<2>().cwiseProduct(centroid.head<2>()));
float covariance = second_moment_of_area_covariance_accumulator / area - centroid.x() * centroid.y();
std::cout << tag << std::endl;
std::cout << "area: " << area << std::endl;
std::cout << "centroid: " << centroid.x() << " " << centroid.y() << " " << centroid.z() << std::endl;
std::cout << "variance: " << variance.x() << " " << variance.y() << std::endl;
std::cout << "covariance: " << covariance << std::endl;
}
};
Integrals::Integrals (const Polygons& polygons) { Integrals::Integrals (const Polygons& polygons) {
for (const Polygon &polygon : polygons) { for (const Polygon &polygon : polygons) {
@ -479,222 +454,210 @@ float compute_second_moment(
return moment_at_0_0 - area * distance; return moment_at_0_0 - area * distance;
} }
class ObjectPart ObjectPart::ObjectPart(
{ const std::vector<const ExtrusionEntityCollection*>& extrusion_collections,
public: const bool connected_to_bed,
float volume{}; const coordf_t print_head_z,
Vec3f volume_centroid_accumulator = Vec3f::Zero(); const coordf_t layer_height,
float sticking_area{}; const std::optional<Polygons>& brim
Vec3f sticking_centroid_accumulator = Vec3f::Zero(); ) {
Vec2f sticking_second_moment_of_area_accumulator = Vec2f::Zero(); if (connected_to_bed) {
float sticking_second_moment_of_area_covariance_accumulator{}; this->connected_to_bed = true;
bool connected_to_bed = false; }
ObjectPart( const auto bottom_z = print_head_z - layer_height;
const std::vector<const ExtrusionEntityCollection*>& extrusion_collections, const auto center_z = print_head_z - layer_height / 2;
const bool connected_to_bed,
const coordf_t print_head_z, for (const ExtrusionEntityCollection* collection : extrusion_collections) {
const coordf_t layer_height, if (collection->empty()) {
const std::optional<Polygons>& brim continue;
) {
if (connected_to_bed) {
this->connected_to_bed = true;
} }
const auto bottom_z = print_head_z - layer_height; const Polygons polygons{collection->polygons_covered_by_width()};
const auto center_z = print_head_z - layer_height / 2;
for (const ExtrusionEntityCollection* collection : extrusion_collections) { const Integrals integrals{polygons};
if (collection->empty()) { const float volume = integrals.area * layer_height;
continue; this->volume += volume;
} this->volume_centroid_accumulator += to_3d(integrals.x_i, center_z * integrals.area) / integrals.area * volume; // TODO check that it is correct
const Polygons polygons{collection->polygons_covered_by_width()}; if (this->connected_to_bed) {
const Integrals integrals{polygons};
const float volume = integrals.area * layer_height;
this->volume += volume;
this->volume_centroid_accumulator += to_3d(integrals.x_i, center_z * integrals.area) / integrals.area * volume; // TODO check that it is correct
if (this->connected_to_bed) {
this->sticking_area += integrals.area;
this->sticking_centroid_accumulator += to_3d(integrals.x_i, bottom_z * integrals.area); // TODO check that it layer height should be added
this->sticking_second_moment_of_area_accumulator += integrals.x_i_squared;
this->sticking_second_moment_of_area_covariance_accumulator += integrals.xy;
}
}
if (brim) {
Integrals integrals{*brim};
this->sticking_area += integrals.area; this->sticking_area += integrals.area;
this->sticking_centroid_accumulator += to_3d(integrals.x_i, bottom_z * integrals.area); this->sticking_centroid_accumulator += to_3d(integrals.x_i, bottom_z * integrals.area); // TODO check that it layer height should be added
this->sticking_second_moment_of_area_accumulator += integrals.x_i_squared; this->sticking_second_moment_of_area_accumulator += integrals.x_i_squared;
this->sticking_second_moment_of_area_covariance_accumulator += integrals.xy; this->sticking_second_moment_of_area_covariance_accumulator += integrals.xy;
} }
} }
void add(const ObjectPart &other) if (brim) {
{ Integrals integrals{*brim};
this->connected_to_bed = this->connected_to_bed || other.connected_to_bed; this->sticking_area += integrals.area;
this->volume_centroid_accumulator += other.volume_centroid_accumulator; this->sticking_centroid_accumulator += to_3d(integrals.x_i, bottom_z * integrals.area);
this->volume += other.volume; this->sticking_second_moment_of_area_accumulator += integrals.x_i_squared;
this->sticking_area += other.sticking_area; this->sticking_second_moment_of_area_covariance_accumulator += integrals.xy;
this->sticking_centroid_accumulator += other.sticking_centroid_accumulator;
this->sticking_second_moment_of_area_accumulator += other.sticking_second_moment_of_area_accumulator;
this->sticking_second_moment_of_area_covariance_accumulator += other.sticking_second_moment_of_area_covariance_accumulator;
} }
}
void add_support_point(const Vec3f &position, float sticking_area) void ObjectPart::add(const ObjectPart &other)
{ {
this->sticking_area += sticking_area; this->connected_to_bed = this->connected_to_bed || other.connected_to_bed;
this->sticking_centroid_accumulator += sticking_area * position; this->volume_centroid_accumulator += other.volume_centroid_accumulator;
this->sticking_second_moment_of_area_accumulator += sticking_area * position.head<2>().cwiseProduct(position.head<2>()); this->volume += other.volume;
this->sticking_second_moment_of_area_covariance_accumulator += sticking_area * position.x() * position.y(); this->sticking_area += other.sticking_area;
} this->sticking_centroid_accumulator += other.sticking_centroid_accumulator;
this->sticking_second_moment_of_area_accumulator += other.sticking_second_moment_of_area_accumulator;
this->sticking_second_moment_of_area_covariance_accumulator += other.sticking_second_moment_of_area_covariance_accumulator;
}
void ObjectPart::add_support_point(const Vec3f &position, float sticking_area)
{
this->sticking_area += sticking_area;
this->sticking_centroid_accumulator += sticking_area * position;
this->sticking_second_moment_of_area_accumulator += sticking_area * position.head<2>().cwiseProduct(position.head<2>());
this->sticking_second_moment_of_area_covariance_accumulator += sticking_area * position.x() * position.y();
}
float compute_elastic_section_modulus( float ObjectPart::compute_elastic_section_modulus(
const Vec2f &line_dir, const Vec2f &line_dir,
const Vec3f &extreme_point, const Vec3f &extreme_point,
const Integrals& integrals const Integrals& integrals
) const { ) const {
float second_moment_of_area = compute_second_moment(integrals, Vec2f{-line_dir.y(), line_dir.x()}); float second_moment_of_area = compute_second_moment(integrals, Vec2f{-line_dir.y(), line_dir.x()});
if (second_moment_of_area < EPSILON) { return 0.0f; } if (second_moment_of_area < EPSILON) { return 0.0f; }
Vec2f centroid = integrals.x_i / integrals.area; Vec2f centroid = integrals.x_i / integrals.area;
float extreme_fiber_dist = line_alg::distance_to(Linef(centroid.head<2>().cast<double>(), float extreme_fiber_dist = line_alg::distance_to(Linef(centroid.head<2>().cast<double>(),
(centroid.head<2>() + Vec2f(line_dir.y(), -line_dir.x())).cast<double>()), (centroid.head<2>() + Vec2f(line_dir.y(), -line_dir.x())).cast<double>()),
extreme_point.head<2>().cast<double>()); extreme_point.head<2>().cast<double>());
float elastic_section_modulus = second_moment_of_area / extreme_fiber_dist; float elastic_section_modulus = second_moment_of_area / extreme_fiber_dist;
#ifdef DETAILED_DEBUG_LOGS #ifdef DETAILED_DEBUG_LOGS
BOOST_LOG_TRIVIAL(debug) << "extreme_fiber_dist: " << extreme_fiber_dist; BOOST_LOG_TRIVIAL(debug) << "extreme_fiber_dist: " << extreme_fiber_dist;
BOOST_LOG_TRIVIAL(debug) << "elastic_section_modulus: " << elastic_section_modulus; BOOST_LOG_TRIVIAL(debug) << "elastic_section_modulus: " << elastic_section_modulus;
#endif #endif
return elastic_section_modulus; return elastic_section_modulus;
} }
std::tuple<float, SupportPointCause> is_stable_while_extruding(const SliceConnection &connection, std::tuple<float, SupportPointCause> ObjectPart::is_stable_while_extruding(const SliceConnection &connection,
const ExtrusionLine &extruded_line, const ExtrusionLine &extruded_line,
const Vec3f &extreme_point, const Vec3f &extreme_point,
float layer_z, float layer_z,
const Params &params) const const Params &params) const
{
// Note that exteme point is calculated for the current layer, while it should
// be computed for the first layer. The shape of the first layer however changes a lot,
// during support points additions (for organic supports it is not even clear how)
// and during merging. Using the current layer is heuristics and also small optimization,
// as the AABB tree for it is calculated anyways. This heuristic should usually be
// on the safe side.
Vec2f line_dir = (extruded_line.b - extruded_line.a).normalized();
const Vec3f &mass_centroid = this->volume_centroid_accumulator / this->volume;
float mass = this->volume * params.filament_density;
float weight = mass * params.gravity_constant;
float movement_force = params.max_acceleration * mass;
float extruder_conflict_force = params.standard_extruder_conflict_force +
std::min(extruded_line.curled_up_height, 1.0f) * params.malformations_additive_conflict_extruder_force;
// section for bed calculations
{ {
// Note that exteme point is calculated for the current layer, while it should if (this->sticking_area < EPSILON) return {1.0f, SupportPointCause::UnstableFloatingPart};
// be computed for the first layer. The shape of the first layer however changes a lot,
// during support points additions (for organic supports it is not even clear how)
// and during merging. Using the current layer is heuristics and also small optimization,
// as the AABB tree for it is calculated anyways. This heuristic should usually be
// on the safe side.
Vec2f line_dir = (extruded_line.b - extruded_line.a).normalized();
const Vec3f &mass_centroid = this->volume_centroid_accumulator / this->volume;
float mass = this->volume * params.filament_density;
float weight = mass * params.gravity_constant;
float movement_force = params.max_acceleration * mass; Integrals integrals;
integrals.area = this->sticking_area;
integrals.x_i = this->sticking_centroid_accumulator.head<2>();
integrals.x_i_squared = this->sticking_second_moment_of_area_accumulator;
integrals.xy = this->sticking_second_moment_of_area_covariance_accumulator;
float extruder_conflict_force = params.standard_extruder_conflict_force + Vec3f bed_centroid = this->sticking_centroid_accumulator / this->sticking_area;
std::min(extruded_line.curled_up_height, 1.0f) * params.malformations_additive_conflict_extruder_force; float bed_yield_torque = -compute_elastic_section_modulus(line_dir, extreme_point, integrals) * params.get_bed_adhesion_yield_strength();
// section for bed calculations Vec2f bed_weight_arm = (mass_centroid.head<2>() - bed_centroid.head<2>());
{ float bed_weight_arm_len = bed_weight_arm.norm();
if (this->sticking_area < EPSILON) return {1.0f, SupportPointCause::UnstableFloatingPart};
Integrals integrals; float bed_weight_dir_xy_variance = compute_second_moment(integrals, {-bed_weight_arm.y(), bed_weight_arm.x()}) / this->sticking_area;
integrals.area = this->sticking_area; float bed_weight_sign = bed_weight_arm_len < 2.0f * sqrt(bed_weight_dir_xy_variance) ? -1.0f : 1.0f;
integrals.x_i = this->sticking_centroid_accumulator.head<2>(); float bed_weight_torque = bed_weight_sign * bed_weight_arm_len * weight;
integrals.x_i_squared = this->sticking_second_moment_of_area_accumulator;
integrals.xy = this->sticking_second_moment_of_area_covariance_accumulator;
Vec3f bed_centroid = this->sticking_centroid_accumulator / this->sticking_area; float bed_movement_arm = std::max(0.0f, mass_centroid.z() - bed_centroid.z());
float bed_yield_torque = -compute_elastic_section_modulus(line_dir, extreme_point, integrals) * params.get_bed_adhesion_yield_strength(); float bed_movement_torque = movement_force * bed_movement_arm;
Vec2f bed_weight_arm = (mass_centroid.head<2>() - bed_centroid.head<2>()); float bed_conflict_torque_arm = layer_z - bed_centroid.z();
float bed_weight_arm_len = bed_weight_arm.norm(); float bed_extruder_conflict_torque = extruder_conflict_force * bed_conflict_torque_arm;
float bed_weight_dir_xy_variance = compute_second_moment(integrals, {-bed_weight_arm.y(), bed_weight_arm.x()}) / this->sticking_area; float bed_total_torque = bed_movement_torque + bed_extruder_conflict_torque + bed_weight_torque + bed_yield_torque;
float bed_weight_sign = bed_weight_arm_len < 2.0f * sqrt(bed_weight_dir_xy_variance) ? -1.0f : 1.0f;
float bed_weight_torque = bed_weight_sign * bed_weight_arm_len * weight;
float bed_movement_arm = std::max(0.0f, mass_centroid.z() - bed_centroid.z());
float bed_movement_torque = movement_force * bed_movement_arm;
float bed_conflict_torque_arm = layer_z - bed_centroid.z();
float bed_extruder_conflict_torque = extruder_conflict_force * bed_conflict_torque_arm;
float bed_total_torque = bed_movement_torque + bed_extruder_conflict_torque + bed_weight_torque + bed_yield_torque;
#ifdef DETAILED_DEBUG_LOGS #ifdef DETAILED_DEBUG_LOGS
BOOST_LOG_TRIVIAL(debug) << "bed_centroid: " << bed_centroid.x() << " " << bed_centroid.y() << " " << bed_centroid.z(); BOOST_LOG_TRIVIAL(debug) << "bed_centroid: " << bed_centroid.x() << " " << bed_centroid.y() << " " << bed_centroid.z();
BOOST_LOG_TRIVIAL(debug) << "SSG: bed_yield_torque: " << bed_yield_torque; BOOST_LOG_TRIVIAL(debug) << "SSG: bed_yield_torque: " << bed_yield_torque;
BOOST_LOG_TRIVIAL(debug) << "SSG: bed_weight_arm: " << bed_weight_arm_len; BOOST_LOG_TRIVIAL(debug) << "SSG: bed_weight_arm: " << bed_weight_arm_len;
BOOST_LOG_TRIVIAL(debug) << "SSG: bed_weight_torque: " << bed_weight_torque; BOOST_LOG_TRIVIAL(debug) << "SSG: bed_weight_torque: " << bed_weight_torque;
BOOST_LOG_TRIVIAL(debug) << "SSG: bed_movement_arm: " << bed_movement_arm; BOOST_LOG_TRIVIAL(debug) << "SSG: bed_movement_arm: " << bed_movement_arm;
BOOST_LOG_TRIVIAL(debug) << "SSG: bed_movement_torque: " << bed_movement_torque; BOOST_LOG_TRIVIAL(debug) << "SSG: bed_movement_torque: " << bed_movement_torque;
BOOST_LOG_TRIVIAL(debug) << "SSG: bed_conflict_torque_arm: " << bed_conflict_torque_arm; BOOST_LOG_TRIVIAL(debug) << "SSG: bed_conflict_torque_arm: " << bed_conflict_torque_arm;
BOOST_LOG_TRIVIAL(debug) << "SSG: extruded_line.curled_up_height: " << extruded_line.curled_up_height; BOOST_LOG_TRIVIAL(debug) << "SSG: extruded_line.curled_up_height: " << extruded_line.curled_up_height;
BOOST_LOG_TRIVIAL(debug) << "SSG: extruded_line.form_quality: " << extruded_line.form_quality; BOOST_LOG_TRIVIAL(debug) << "SSG: extruded_line.form_quality: " << extruded_line.form_quality;
BOOST_LOG_TRIVIAL(debug) << "SSG: extruder_conflict_force: " << extruder_conflict_force; BOOST_LOG_TRIVIAL(debug) << "SSG: extruder_conflict_force: " << extruder_conflict_force;
BOOST_LOG_TRIVIAL(debug) << "SSG: bed_extruder_conflict_torque: " << bed_extruder_conflict_torque; BOOST_LOG_TRIVIAL(debug) << "SSG: bed_extruder_conflict_torque: " << bed_extruder_conflict_torque;
BOOST_LOG_TRIVIAL(debug) << "SSG: total_torque: " << bed_total_torque << " layer_z: " << layer_z; BOOST_LOG_TRIVIAL(debug) << "SSG: total_torque: " << bed_total_torque << " layer_z: " << layer_z;
#endif #endif
if (bed_total_torque > 0) { if (bed_total_torque > 0) {
return {bed_total_torque / bed_conflict_torque_arm, return {bed_total_torque / bed_conflict_torque_arm,
(this->connected_to_bed ? SupportPointCause::SeparationFromBed : SupportPointCause::UnstableFloatingPart)}; (this->connected_to_bed ? SupportPointCause::SeparationFromBed : SupportPointCause::UnstableFloatingPart)};
}
}
// section for weak connection calculations
{
if (connection.area < EPSILON) return {1.0f, SupportPointCause::UnstableFloatingPart};
Vec3f conn_centroid = connection.centroid_accumulator / connection.area;
if (layer_z - conn_centroid.z() < 3.0f) { return {-1.0f, SupportPointCause::WeakObjectPart}; }
Integrals integrals;
integrals.area = connection.area;
integrals.x_i = connection.centroid_accumulator.head<2>();
integrals.x_i_squared = connection.second_moment_of_area_accumulator;
integrals.xy = connection.second_moment_of_area_covariance_accumulator;
float conn_yield_torque = compute_elastic_section_modulus(line_dir, extreme_point, integrals) * params.material_yield_strength;
float conn_weight_arm = (conn_centroid.head<2>() - mass_centroid.head<2>()).norm();
if (layer_z - conn_centroid.z() < 30.0) {
conn_weight_arm = 0.0f; // Given that we do not have very good info about the weight distribution between the connection and current layer,
// do not consider the weight until quite far away from the weak connection segment
}
float conn_weight_torque = conn_weight_arm * weight * (1.0f - conn_centroid.z() / layer_z) * (1.0f - conn_centroid.z() / layer_z);
float conn_movement_arm = std::max(0.0f, mass_centroid.z() - conn_centroid.z());
float conn_movement_torque = movement_force * conn_movement_arm;
float conn_conflict_torque_arm = layer_z - conn_centroid.z();
float conn_extruder_conflict_torque = extruder_conflict_force * conn_conflict_torque_arm;
float conn_total_torque = conn_movement_torque + conn_extruder_conflict_torque + conn_weight_torque - conn_yield_torque;
#ifdef DETAILED_DEBUG_LOGS
BOOST_LOG_TRIVIAL(debug) << "conn_centroid: " << conn_centroid.x() << " " << conn_centroid.y() << " " << conn_centroid.z();
BOOST_LOG_TRIVIAL(debug) << "SSG: conn_yield_torque: " << conn_yield_torque;
BOOST_LOG_TRIVIAL(debug) << "SSG: conn_weight_arm: " << conn_weight_arm;
BOOST_LOG_TRIVIAL(debug) << "SSG: conn_weight_torque: " << conn_weight_torque;
BOOST_LOG_TRIVIAL(debug) << "SSG: conn_movement_arm: " << conn_movement_arm;
BOOST_LOG_TRIVIAL(debug) << "SSG: conn_movement_torque: " << conn_movement_torque;
BOOST_LOG_TRIVIAL(debug) << "SSG: conn_conflict_torque_arm: " << conn_conflict_torque_arm;
BOOST_LOG_TRIVIAL(debug) << "SSG: conn_extruder_conflict_torque: " << conn_extruder_conflict_torque;
BOOST_LOG_TRIVIAL(debug) << "SSG: total_torque: " << conn_total_torque << " layer_z: " << layer_z;
#endif
return {conn_total_torque / conn_conflict_torque_arm, SupportPointCause::WeakObjectPart};
} }
} }
};
// section for weak connection calculations
{
if (connection.area < EPSILON) return {1.0f, SupportPointCause::UnstableFloatingPart};
Vec3f conn_centroid = connection.centroid_accumulator / connection.area;
if (layer_z - conn_centroid.z() < 3.0f) { return {-1.0f, SupportPointCause::WeakObjectPart}; }
Integrals integrals;
integrals.area = connection.area;
integrals.x_i = connection.centroid_accumulator.head<2>();
integrals.x_i_squared = connection.second_moment_of_area_accumulator;
integrals.xy = connection.second_moment_of_area_covariance_accumulator;
float conn_yield_torque = compute_elastic_section_modulus(line_dir, extreme_point, integrals) * params.material_yield_strength;
float conn_weight_arm = (conn_centroid.head<2>() - mass_centroid.head<2>()).norm();
if (layer_z - conn_centroid.z() < 30.0) {
conn_weight_arm = 0.0f; // Given that we do not have very good info about the weight distribution between the connection and current layer,
// do not consider the weight until quite far away from the weak connection segment
}
float conn_weight_torque = conn_weight_arm * weight * (1.0f - conn_centroid.z() / layer_z) * (1.0f - conn_centroid.z() / layer_z);
float conn_movement_arm = std::max(0.0f, mass_centroid.z() - conn_centroid.z());
float conn_movement_torque = movement_force * conn_movement_arm;
float conn_conflict_torque_arm = layer_z - conn_centroid.z();
float conn_extruder_conflict_torque = extruder_conflict_force * conn_conflict_torque_arm;
float conn_total_torque = conn_movement_torque + conn_extruder_conflict_torque + conn_weight_torque - conn_yield_torque;
#ifdef DETAILED_DEBUG_LOGS
BOOST_LOG_TRIVIAL(debug) << "conn_centroid: " << conn_centroid.x() << " " << conn_centroid.y() << " " << conn_centroid.z();
BOOST_LOG_TRIVIAL(debug) << "SSG: conn_yield_torque: " << conn_yield_torque;
BOOST_LOG_TRIVIAL(debug) << "SSG: conn_weight_arm: " << conn_weight_arm;
BOOST_LOG_TRIVIAL(debug) << "SSG: conn_weight_torque: " << conn_weight_torque;
BOOST_LOG_TRIVIAL(debug) << "SSG: conn_movement_arm: " << conn_movement_arm;
BOOST_LOG_TRIVIAL(debug) << "SSG: conn_movement_torque: " << conn_movement_torque;
BOOST_LOG_TRIVIAL(debug) << "SSG: conn_conflict_torque_arm: " << conn_conflict_torque_arm;
BOOST_LOG_TRIVIAL(debug) << "SSG: conn_extruder_conflict_torque: " << conn_extruder_conflict_torque;
BOOST_LOG_TRIVIAL(debug) << "SSG: total_torque: " << conn_total_torque << " layer_z: " << layer_z;
#endif
return {conn_total_torque / conn_conflict_torque_arm, SupportPointCause::WeakObjectPart};
}
}
std::vector<const ExtrusionEntityCollection*> gather_extrusions(const LayerSlice& slice, const Layer* layer) { std::vector<const ExtrusionEntityCollection*> gather_extrusions(const LayerSlice& slice, const Layer* layer) {
// TODO reserve might be good, benchmark // TODO reserve might be good, benchmark
@ -1352,4 +1315,3 @@ std::vector<std::pair<SupportPointCause, bool>> gather_issues(const SupportPoint
} }
} // namespace SupportSpotsGenerator } // namespace SupportSpotsGenerator
} // namespace Slic3r

71
src/libslic3r/SupportSpotsGenerator.hpp
View File

@ -174,6 +174,77 @@ float compute_second_moment(
const Vec2f& axis_direction const Vec2f& axis_direction
); );
class ExtrusionLine
{
public:
ExtrusionLine();
ExtrusionLine(const Vec2f &a, const Vec2f &b, float len, const ExtrusionEntity *origin_entity);
ExtrusionLine(const Vec2f &a, const Vec2f &b);
bool is_external_perimeter() const;
Vec2f a;
Vec2f b;
float len;
const ExtrusionEntity *origin_entity;
std::optional<SupportSpotsGenerator::SupportPointCause> support_point_generated = {};
float form_quality = 1.0f;
float curled_up_height = 0.0f;
static const constexpr int Dim = 2;
using Scalar = Vec2f::Scalar;
};
struct SliceConnection
{
float area{};
Vec3f centroid_accumulator = Vec3f::Zero();
Vec2f second_moment_of_area_accumulator = Vec2f::Zero();
float second_moment_of_area_covariance_accumulator{};
void add(const SliceConnection &other);
void print_info(const std::string &tag) const;
};
class ObjectPart
{
public:
float volume{};
Vec3f volume_centroid_accumulator = Vec3f::Zero();
float sticking_area{};
Vec3f sticking_centroid_accumulator = Vec3f::Zero();
Vec2f sticking_second_moment_of_area_accumulator = Vec2f::Zero();
float sticking_second_moment_of_area_covariance_accumulator{};
bool connected_to_bed = false;
ObjectPart(
const std::vector<const ExtrusionEntityCollection*>& extrusion_collections,
const bool connected_to_bed,
const coordf_t print_head_z,
const coordf_t layer_height,
const std::optional<Polygons>& brim
);
void add(const ObjectPart &other);
void add_support_point(const Vec3f &position, float sticking_area);
float compute_elastic_section_modulus(
const Vec2f &line_dir,
const Vec3f &extreme_point,
const Integrals& integrals
) const;
std::tuple<float, SupportPointCause> is_stable_while_extruding(const SliceConnection &connection,
const ExtrusionLine &extruded_line,
const Vec3f &extreme_point,
float layer_z,
const Params &params) const;
};
using PartialObjects = std::vector<PartialObject>; using PartialObjects = std::vector<PartialObject>;
// Both support points and partial objects are sorted from the lowest z to the highest // Both support points and partial objects are sorted from the lowest z to the highest

21
tests/libslic3r/test_support_spots_generator.cpp
View File

@ -95,3 +95,24 @@ TEST_CASE("Moments calculation for rotated axis.", "[SupportSpotsGenerator]") {
CHECK(moment_calculated_then_rotated == Approx(moment_rotated_polygon)); CHECK(moment_calculated_then_rotated == Approx(moment_rotated_polygon));
} }
TEST_CASE("TODO", "[SupportSpotsGenerator]") {
const Polyline polyline{
Point{scaled(Vec2f{0, 0})},
Point{scaled(Vec2f{1, 0})},
};
ExtrusionAttributes attributes;
attributes.width = 0.1;
const ExtrusionPath path{polyline, attributes};
ExtrusionEntityCollection collection;
collection.append(path);
std::vector<const ExtrusionEntityCollection*> collections{&collection};
Polygons polygons = path.polygons_covered_by_width();
for (const Polygon& polygon : polygons) {
std::cout << "Polygon: " << std::endl;
for (const Line& line : polygon.lines()) {
std::cout << "(" << line.a.x() << ", " << line.a.y() << ")" << std::endl;
}
}
}