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Added clipping of finite Voronoi edges that have coordinates that don't fit inside type coord_t.

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This commit is contained in:
Lukáš Hejl 2021-07-30 18:11:02 +02:00
parent 93b86da770
commit b16aada962
1 changed files with 59 additions and 32 deletions
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91
src/libslic3r/MultiMaterialSegmentation.cpp
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@ -5,6 +5,7 @@
#include "Print.hpp"
#include "VoronoiVisualUtils.hpp"
#include "MutablePolygon.hpp"
#include "format.hpp"
#include <utility>
#include <cfloat>
@ -502,11 +503,13 @@ static std::vector<std::vector<ColoredLine>> colorize_polygons(const std::vector
using boost::polygon::voronoi_diagram;
static inline Point mk_point(const Voronoi::VD::vertex_type *point) { return Point(coord_t(point->x()), coord_t(point->y())); }
static inline Point mk_point(const Voronoi::VD::vertex_type *point) { return {coord_t(point->x()), coord_t(point->y())}; }
static inline Point mk_point(const Voronoi::Internal::point_type &point) { return Point(coord_t(point.x()), coord_t(point.y())); }
static inline Point mk_point(const Voronoi::Internal::point_type &point) { return {coord_t(point.x()), coord_t(point.y())}; }
static inline Point mk_point(const voronoi_diagram<double>::vertex_type &point) { return Point(coord_t(point.x()), coord_t(point.y())); }
static inline Point mk_point(const voronoi_diagram<double>::vertex_type &point) { return {coord_t(point.x()), coord_t(point.y())}; }
static inline Vec2d mk_vec2(const voronoi_diagram<double>::vertex_type *point) { return {point->x(), point->y()}; }
struct MMU_Graph
{
@ -796,6 +799,27 @@ static inline void init_polygon_indices(const MMU_Graph
}
}
// Voronoi edges produced by Voronoi generator cloud have coordinates that don't fit inside coord_t (int32_t).
// Because of that, this function tries to clip edges that have one endpoint of the edge inside the BoundingBox.
static inline Line clip_finite_voronoi_edge(const Voronoi::VD::edge_type &edge, const BoundingBoxf &bbox)
{
assert(edge.is_finite());
Vec2d v0 = mk_vec2(edge.vertex0());
Vec2d v1 = mk_vec2(edge.vertex1());
bool contains_v0 = bbox.contains(v0);
bool contains_v1 = bbox.contains(v1);
if ((contains_v0 && contains_v1) || (!contains_v0 && !contains_v1))
return {mk_point(edge.vertex0()), mk_point(edge.vertex1())};
Vec2d vector = (v1 - v0).normalized() * bbox.size().norm();
if (!contains_v0)
v0 = (v1 - vector);
else
v1 = (v0 + vector);
return {v0.cast<coord_t>(), v1.cast<coord_t>()};
}
static MMU_Graph build_graph(size_t layer_idx, const std::vector<std::vector<ColoredLine>> &color_poly)
{
Geometry::VoronoiDiagram vd;
@ -852,7 +876,8 @@ static MMU_Graph build_graph(size_t layer_idx, const std::vector<std::vector<Col
};
bbox.offset(scale_(10.));
const double bbox_dim_max = double(std::max(bbox.size().x(), bbox.size().y()));
const BoundingBoxf bbox_clip(bbox.min.cast<double>(), bbox.max.cast<double>());
const double bbox_dim_max = double(std::max(bbox.size().x(), bbox.size().y()));
// Make a copy of the input segments with the double type.
std::vector<Voronoi::Internal::segment_type> segments;
@ -890,72 +915,74 @@ static MMU_Graph build_graph(size_t layer_idx, const std::vector<std::vector<Col
}
}
} else if (edge_it->is_finite()) {
const Point v0 = mk_point(edge_it->vertex0());
const Point v1 = mk_point(edge_it->vertex1());
const size_t from_idx = edge_it->vertex0()->color();
const size_t to_idx = edge_it->vertex1()->color();
// Both points are on contour, so skip them. In cases of duplicate Voronoi vertices, skip edges between the same two points.
if (graph.is_edge_connecting_two_contour_vertices(edge_it) || (edge_it->vertex0()->color() == edge_it->vertex1()->color())) continue;
if (graph.is_edge_connecting_two_contour_vertices(edge_it) || (edge_it->vertex0()->color() == edge_it->vertex1()->color()))
continue;
const Line edge_line(v0, v1);
const Line edge_line = clip_finite_voronoi_edge(*edge_it, bbox_clip);
const Line contour_line = lines_colored[edge_it->cell()->source_index()].line;
const ColoredLine colored_line = lines_colored[edge_it->cell()->source_index()];
const ColoredLine contour_line_prev = get_prev_contour_line(edge_it);
const ColoredLine contour_line_next = get_next_contour_line(edge_it);
Point intersection;
if (edge_it->vertex0()->color() >= graph.nodes_count() || edge_it->vertex1()->color() >= graph.nodes_count()) {
// if(edge_it->vertex0()->color() < graph.nodes_count() && !graph.is_vertex_on_contour(edge_it->vertex0())) {
//
// }
if (edge_it->vertex1()->color() < graph.nodes_count() && !graph.is_vertex_on_contour(edge_it->vertex1())) {
Line contour_line_twin = lines_colored[edge_it->twin()->cell()->source_index()].line;
enum class Vertex { VERTEX0, VERTEX1 };
auto append_edge_if_intersects_with_contour = [&graph, &lines_colored, &edge_line, &contour_line](const voronoi_diagram<double>::const_edge_iterator &edge_iterator, const Vertex vertex) {
Point intersection;
Line contour_line_twin = lines_colored[edge_iterator->twin()->cell()->source_index()].line;
if (line_intersection_with_epsilon(contour_line_twin, edge_line, &intersection)) {
const MMU_Graph::Arc &graph_arc = graph.get_border_arc(edge_it->twin()->cell()->source_index());
const MMU_Graph::Arc &graph_arc = graph.get_border_arc(edge_iterator->twin()->cell()->source_index());
const size_t to_idx_l = is_point_closer_to_beginning_of_line(contour_line_twin, intersection) ? graph_arc.from_idx :
graph_arc.to_idx;
graph.append_edge(edge_it->vertex1()->color(), to_idx_l);
graph.append_edge(vertex == Vertex::VERTEX0 ? edge_iterator->vertex0()->color() : edge_iterator->vertex1()->color(), to_idx_l);
} else if (line_intersection_with_epsilon(contour_line, edge_line, &intersection)) {
const MMU_Graph::Arc &graph_arc = graph.get_border_arc(edge_it->cell()->source_index());
const MMU_Graph::Arc &graph_arc = graph.get_border_arc(edge_iterator->cell()->source_index());
const size_t to_idx_l = is_point_closer_to_beginning_of_line(contour_line, intersection) ? graph_arc.from_idx : graph_arc.to_idx;
graph.append_edge(edge_it->vertex1()->color(), to_idx_l);
graph.append_edge(vertex == Vertex::VERTEX0 ? edge_iterator->vertex0()->color() : edge_iterator->vertex1()->color(), to_idx_l);
}
mark_processed(edge_it);
}
mark_processed(edge_iterator);
};
if (edge_it->vertex0()->color() < graph.nodes_count() && !graph.is_vertex_on_contour(edge_it->vertex0()))
append_edge_if_intersects_with_contour(edge_it, Vertex::VERTEX0);
if (edge_it->vertex1()->color() < graph.nodes_count() && !graph.is_vertex_on_contour(edge_it->vertex1()))
append_edge_if_intersects_with_contour(edge_it, Vertex::VERTEX1);
} else if (graph.is_edge_attach_to_contour(edge_it)) {
mark_processed(edge_it);
// Skip edges witch connection two points on a contour
if (graph.is_edge_connecting_two_contour_vertices(edge_it))
continue;
const size_t from_idx = edge_it->vertex0()->color();
const size_t to_idx = edge_it->vertex1()->color();
if (graph.is_vertex_on_contour(edge_it->vertex0())) {
if (is_point_closer_to_beginning_of_line(contour_line, v0)) {
if ((!has_same_color(contour_line_prev, colored_line) || force_edge_adding[colored_line.poly_idx]) && points_inside(contour_line_prev.line, contour_line, v1)) {
if (is_point_closer_to_beginning_of_line(contour_line, edge_line.a)) {
if ((!has_same_color(contour_line_prev, colored_line) || force_edge_adding[colored_line.poly_idx]) && points_inside(contour_line_prev.line, contour_line, edge_line.b)) {
graph.append_edge(from_idx, to_idx);
force_edge_adding[colored_line.poly_idx] = false;
}
} else {
if ((!has_same_color(contour_line_next, colored_line) || force_edge_adding[colored_line.poly_idx]) && points_inside(contour_line, contour_line_next.line, v1)) {
if ((!has_same_color(contour_line_next, colored_line) || force_edge_adding[colored_line.poly_idx]) && points_inside(contour_line, contour_line_next.line, edge_line.b)) {
graph.append_edge(from_idx, to_idx);
force_edge_adding[colored_line.poly_idx] = false;
}
}
} else {
assert(graph.is_vertex_on_contour(edge_it->vertex1()));
if (is_point_closer_to_beginning_of_line(contour_line, v1)) {
if ((!has_same_color(contour_line_prev, colored_line) || force_edge_adding[colored_line.poly_idx]) && points_inside(contour_line_prev.line, contour_line, v0)) {
if (is_point_closer_to_beginning_of_line(contour_line, edge_line.b)) {
if ((!has_same_color(contour_line_prev, colored_line) || force_edge_adding[colored_line.poly_idx]) && points_inside(contour_line_prev.line, contour_line, edge_line.a)) {
graph.append_edge(from_idx, to_idx);
force_edge_adding[colored_line.poly_idx] = false;
}
} else {
if ((!has_same_color(contour_line_next, colored_line) || force_edge_adding[colored_line.poly_idx]) && points_inside(contour_line, contour_line_next.line, v0)) {
if ((!has_same_color(contour_line_next, colored_line) || force_edge_adding[colored_line.poly_idx]) && points_inside(contour_line, contour_line_next.line, edge_line.a)) {
graph.append_edge(from_idx, to_idx);
force_edge_adding[colored_line.poly_idx] = false;
}
}
}
} else if (line_intersection_with_epsilon(contour_line, edge_line, &intersection)) {
} else if (Point intersection; line_intersection_with_epsilon(contour_line, edge_line, &intersection)) {
mark_processed(edge_it);
Point real_v0 = graph.nodes[edge_it->vertex0()->color()].point;
Point real_v1 = graph.nodes[edge_it->vertex1()->color()].point;
@ -1202,7 +1229,7 @@ static void cut_segmented_layers(const std::vector<ExPolygons>
BOOST_LOG_TRIVIAL(debug) << "MMU segmentation - cutting segmented layers in parallel - end";
}
// #define MMU_SEGMENTATION_DEBUG_TOP_BOTTOM
//#define MMU_SEGMENTATION_DEBUG_TOP_BOTTOM
// Returns MMU segmentation of top and bottom layers based on painting in MMU segmentation gizmo
static inline std::vector<std::vector<ExPolygons>> mmu_segmentation_top_and_bottom_layers(const PrintObject &print_object,
@ -1671,7 +1698,7 @@ static void export_regions_to_svg(const std::string &path, const std::vector<std
svg.draw_outline(lslices, "green", "lime", stroke_width);
for (const std::pair<ExPolygon, size_t> &region : regions) {
int region_color = region.second;
int region_color = int(region.second);
if (region_color >= 0 && region_color < int(colors.size()))
svg.draw(region.first, colors[region_color]);
else