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This commit is contained in:
PavelMikus 2022-02-15 13:33:15 +01:00
parent 36a4906536
commit 8226061da4
2 changed files with 46 additions and 74 deletions
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104
src/libslic3r/GCode/SeamPlacerNG.cpp
View File

@ -15,26 +15,10 @@
#include "libslic3r/SVG.hpp"
#include "libslic3r/Layer.hpp"
#include <boost/nowide/cstdio.hpp>
namespace Slic3r {
namespace SeamPlacerImpl {
void atomic_fetch_add_float(std::atomic<float> &atomic, float increment)
{
float old_val;
float new_val;
do
{
old_val = atomic.load(std::memory_order_relaxed);
new_val = old_val + increment;
} while (!atomic.compare_exchange_weak(old_val, new_val,
std::memory_order_release,
std::memory_order_relaxed));
}
/// Coordinate frame
class Frame {
public:
@ -171,20 +155,6 @@ std::vector<HitInfo> raycast_visibility(const AABBTreeIndirect::Tree<3, float> &
BOOST_LOG_TRIVIAL(debug)
<< "SeamPlacer: raycast visibility for " << ray_count << " rays: end";
its_write_obj(triangles, "triangles.obj");
Slic3r::CNumericLocalesSetter locales_setter;
FILE *fp = boost::nowide::fopen("hits.obj", "w");
if (fp == nullptr) {
BOOST_LOG_TRIVIAL(error)
<< "Couldn't open " << "hits.obj" << " for writing";
}
for (size_t i = 0; i < hit_points.size(); ++i)
fprintf(fp, "v %f %f %f \n", hit_points[i].m_position[0], hit_points[i].m_position[1],
hit_points[i].m_position[2]);
fclose(fp);
return hit_points;
}
@ -495,24 +465,31 @@ struct DefaultSeamComparator {
auto angle_score = [](float ccw_angle) {
if (ccw_angle > 0) {
float normalized = (ccw_angle / float(PI));
return normalized * normalized * normalized * 0.8;
float normalized = (ccw_angle / float(PI)) * 0.9;
return normalized;
} else {
float normalized = (-ccw_angle / float(PI));
return normalized * normalized * normalized * 1.0;
float normalized = (-ccw_angle / float(PI)) * 1.1;
return normalized;
}
};
float angle_weight = 2.0;
auto vis_score = [](float visibility) {
return 1.0 - visibility / SeamPlacer::expected_hits_per_area;
return (1.0 - visibility / SeamPlacer::expected_hits_per_area);
};
float vis_weight = 1.2;
auto align_score = [](float nearby_seams) {
return nearby_seams / (0.25 * (sqrt(2) * SeamPlacer::seam_align_layer_dist));
return nearby_seams / SeamPlacer::seam_align_layer_dist;
};
float align_weight = 1.0;
float score_a = angle_score(a.m_ccw_angle) + vis_score(a.m_visibility) + align_score(*a.m_nearby_seam_points);
float score_b = angle_score(b.m_ccw_angle) + vis_score(b.m_visibility) + align_score(*b.m_nearby_seam_points);
float score_a = angle_score(a.m_ccw_angle) * angle_weight +
vis_score(a.m_visibility) * vis_weight +
align_score(*a.m_nearby_seam_points) * align_weight;
float score_b = angle_score(b.m_ccw_angle) * angle_weight +
vis_score(b.m_visibility) * vis_weight +
align_score(*b.m_nearby_seam_points) * align_weight;
if (score_a > score_b)
return true;
@ -612,48 +589,42 @@ void SeamPlacer::distribute_seam_positions_for_alignment(const PrintObject *po)
int other_layer_idx_top = std::min(layer_idx + seam_align_layer_dist,
m_perimeter_points_per_object[po].size() - 1);
Vec3d last_point_position = seam_position;
for (int other_layer_idx = layer_idx + 1;
other_layer_idx <= other_layer_idx_top; ++other_layer_idx) {
std::vector<size_t> nearby_point_indexes = find_nearby_points(
Vec3d projected_position { last_point_position.x(), last_point_position.y(), po->get_layer(other_layer_idx)->slice_z};
size_t closest_point_index = find_closest_point(
*m_perimeter_points_trees_per_object[po][other_layer_idx],
seam_position,
seam_align_tolerable_dist * (other_layer_idx - layer_idx));
projected_position);
if (nearby_point_indexes.empty()) {
SeamCandidate &point_ref =
m_perimeter_points_per_object[po][other_layer_idx][closest_point_index];
if ((point_ref.m_position - projected_position).norm()
< SeamPlacer::seam_align_tolerable_dist) {
point_ref.m_nearby_seam_points->fetch_add(1, std::memory_order_relaxed);
last_point_position = point_ref.m_position;
} else {
break;
}
for (size_t nearby_point_index : nearby_point_indexes) {
SeamCandidate &point_ref =
m_perimeter_points_per_object[po][other_layer_idx][nearby_point_index];
float distance = (seam_position - point_ref.m_position).norm();
atomic_fetch_add_float(*point_ref.m_nearby_seam_points, 1.0 / distance);
}
}
last_point_position = seam_position;
if (layer_idx > 0) {
for (int other_layer_idx = layer_idx - 1;
other_layer_idx >= other_layer_idx_bottom; --other_layer_idx) {
std::vector<size_t> nearby_point_indexes = find_nearby_points(
Vec3d projected_position { last_point_position.x(), last_point_position.y(), po->get_layer(other_layer_idx)->slice_z};
size_t closest_point_index = find_closest_point(
*m_perimeter_points_trees_per_object[po][other_layer_idx],
seam_position,
seam_align_tolerable_dist * (layer_idx - other_layer_idx));
projected_position);
if (nearby_point_indexes.empty()) {
SeamCandidate &point_ref =
m_perimeter_points_per_object[po][other_layer_idx][closest_point_index];
if ((point_ref.m_position - projected_position).norm()
< SeamPlacer::seam_align_tolerable_dist) {
point_ref.m_nearby_seam_points->fetch_add(1, std::memory_order_relaxed);
last_point_position = point_ref.m_position;
} else {
break;
}
for (size_t nearby_point_index : nearby_point_indexes) {
SeamCandidate &point_ref =
m_perimeter_points_per_object[po][other_layer_idx][nearby_point_index];
float distance = (seam_position - point_ref.m_position).norm();
atomic_fetch_add_float(*point_ref.m_nearby_seam_points, 1.0 / distance);
}
}
}
@ -707,6 +678,7 @@ void SeamPlacer::init(const Print &print) {
m_perimeter_points_per_object[po][layer_idx];
size_t current = 0;
while (current < layer_perimeter_points.size()) {
//NOTE: pick seam point function also resets the m_nearby_seam_points count on all passed points
pick_seam_point(layer_perimeter_points, current,
current + layer_perimeter_points[current].m_polygon_index_reverse,
DefaultSeamComparator { });

16
src/libslic3r/GCode/SeamPlacerNG.hpp
View File

@ -39,7 +39,7 @@ struct SeamCandidate {
m_position(pos), m_visibility(0.0), m_overhang(0.0), m_polygon_index_reverse(polygon_index_reverse), m_seam_index(
0), m_ccw_angle(
ccw_angle), m_type(type) {
m_nearby_seam_points = std::make_unique<std::atomic<float>>(0.0);
m_nearby_seam_points = std::make_unique<std::atomic<size_t>>(0);
}
Vec3d m_position;
float m_visibility;
@ -47,7 +47,7 @@ struct SeamCandidate {
size_t m_polygon_index_reverse;
size_t m_seam_index;
float m_ccw_angle;
std::unique_ptr<std::atomic<float>> m_nearby_seam_points;
std::unique_ptr<std::atomic<size_t>> m_nearby_seam_points;
EnforcedBlockedSeamPoint m_type;
};
@ -81,14 +81,14 @@ class SeamPlacer {
public:
using SeamCandidatesTree =
KDTreeIndirect<3, coordf_t, SeamPlacerImpl::SeamCandidateCoordinateFunctor>;
static constexpr double considered_hits_distance = 2.0;
static constexpr double expected_hits_per_area = 40.0;
static constexpr double considered_hits_distance = 4.0;
static constexpr double expected_hits_per_area = 250.0;
static constexpr float cosine_hemisphere_sampling_power = 1.5;
static constexpr float polygon_angles_arm_distance = 1.0;
static constexpr float polygon_angles_arm_distance = 0.6;
static constexpr float enforcer_blocker_sqr_distance_tolerance = 0.4;
static constexpr size_t seam_align_iterations = 5;
static constexpr size_t seam_align_layer_dist = 50;
static constexpr float seam_align_tolerable_dist = 1;
static constexpr size_t seam_align_iterations = 4;
static constexpr size_t seam_align_layer_dist = 30;
static constexpr float seam_align_tolerable_dist = 0.3;
//perimeter points per object per layer idx, and their corresponding KD trees
std::unordered_map<const PrintObject*, std::vector<std::vector<SeamPlacerImpl::SeamCandidate>>> m_perimeter_points_per_object;
std::unordered_map<const PrintObject*, std::vector<std::unique_ptr<SeamCandidatesTree>>> m_perimeter_points_trees_per_object;