File: perimeters.t

package info (click to toggle)
slic3r-prusa 1.39.2%2Bdfsg-1
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 6,376 kB
  • sloc: cpp: 51,482; perl: 15,619; ansic: 1,370; makefile: 12; python: 11
file content (444 lines) | stat: -rw-r--r-- 24,276 bytes parent folder | download
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
use Test::More tests => 59;
use strict;
use warnings;

BEGIN {
    use FindBin;
    use lib "$FindBin::Bin/../lib";
    use local::lib "$FindBin::Bin/../local-lib";
}

use Slic3r::ExtrusionLoop ':roles';
use Slic3r::ExtrusionPath ':roles';
use List::Util qw(first);
use Slic3r;
use Slic3r::Flow ':roles';
use Slic3r::Geometry qw(PI scale unscale);
use Slic3r::Geometry::Clipper qw(union_ex diff union offset);
use Slic3r::Surface ':types';
use Slic3r::Test;

{
    my $flow = Slic3r::Flow->new(
        width           => 1,
        height          => 1,
        nozzle_diameter => 1,
    );
    
    my $config = Slic3r::Config->new;
    my $test = sub {
        my ($expolygons, %expected) = @_;
        
        my $slices = Slic3r::Surface::Collection->new;
        $slices->append(Slic3r::Surface->new(
            surface_type => S_TYPE_INTERNAL,
            expolygon => $_,
        )) for @$expolygons;
        
        my ($region_config, $object_config, $print_config, $loops, $gap_fill, $fill_surfaces);
        my $g = Slic3r::Layer::PerimeterGenerator->new(
            # input:
            $slices,
            1,  # layer height
            $flow,
            ($region_config = Slic3r::Config::PrintRegion->new),
            ($object_config = Slic3r::Config::PrintObject->new),
            ($print_config  = Slic3r::Config::Print->new),
            
            # output:
            ($loops         = Slic3r::ExtrusionPath::Collection->new),
            ($gap_fill      = Slic3r::ExtrusionPath::Collection->new),
            ($fill_surfaces = Slic3r::Surface::Collection->new),
        );
        $g->config->apply_dynamic($config);
        $g->process;
        
        is scalar(@$loops),
            scalar(@$expolygons), 'expected number of collections';
        ok !defined(first { !$_->isa('Slic3r::ExtrusionPath::Collection') } @$loops),
            'everything is returned as collections';
        
        my $flattened_loops = $loops->flatten;
        my @loops = @$flattened_loops;
        is scalar(@loops),
            $expected{total}, 'expected number of loops';
        is scalar(grep $_->role == EXTR_ROLE_EXTERNAL_PERIMETER, map @$_, @loops),
            $expected{external}, 'expected number of external loops';
        is_deeply [ map { ($_->role == EXTR_ROLE_EXTERNAL_PERIMETER) || 0 } map @$_, @loops ],
            $expected{ext_order}, 'expected external order';
        is scalar(grep $_->loop_role == EXTRL_ROLE_CONTOUR_INTERNAL_PERIMETER, @loops),
            $expected{cinternal}, 'expected number of internal contour loops';
        is scalar(grep $_->polygon->is_counter_clockwise, @loops),
            $expected{ccw}, 'expected number of ccw loops';
        is_deeply [ map $_->polygon->is_counter_clockwise, @loops ],
            $expected{ccw_order}, 'expected ccw/cw order';
        
        if ($expected{nesting}) {
            foreach my $nesting (@{ $expected{nesting} }) {
                for my $i (1..$#$nesting) {
                    ok $loops[$nesting->[$i-1]]->polygon->contains_point($loops[$nesting->[$i]]->first_point),
                        'expected nesting order';
                }
            }
        }
    };
    
    $config->set('perimeters', 3);
    $test->(
        [
            Slic3r::ExPolygon->new(
                Slic3r::Polygon->new_scale([0,0], [100,0], [100,100], [0,100]),
            ),
        ],
        total       => 3,
        external    => 1,
        ext_order   => [0,0,1],
        cinternal   => 1,
        ccw         => 3,
        ccw_order   => [1,1,1],
        nesting     => [ [2,1,0] ],
    );
    $test->(
        [
            Slic3r::ExPolygon->new(
                Slic3r::Polygon->new_scale([0,0], [100,0], [100,100], [0,100]),
                Slic3r::Polygon->new_scale([40,40], [40,60], [60,60], [60,40]),
            ),
        ],
        total       => 6,
        external    => 2,
        ext_order   => [0,0,1,0,0,1],
        cinternal   => 1,
        ccw         => 3,
        ccw_order   => [0,0,0,1,1,1],
        nesting     => [ [5,4,3,0,1,2] ],
    );
    $test->(
        [
            Slic3r::ExPolygon->new(
                Slic3r::Polygon->new_scale([0,0], [200,0], [200,200], [0,200]),
                Slic3r::Polygon->new_scale([20,20], [20,180], [180,180], [180,20]),
            ),
            # nested:
            Slic3r::ExPolygon->new(
                Slic3r::Polygon->new_scale([50,50], [150,50], [150,150], [50,150]),
                Slic3r::Polygon->new_scale([80,80], [80,120], [120,120], [120,80]),
            ),
        ],
        total       => 4*3,
        external    => 4,
        ext_order   => [0,0,1,0,0,1,0,0,1,0,0,1],
        cinternal   => 2,
        ccw         => 2*3,
        ccw_order   => [0,0,0,1,1,1,0,0,0,1,1,1],
    );
    
    $config->set('perimeters', 2);
    $test->(
        [
            Slic3r::ExPolygon->new(
                Slic3r::Polygon->new_scale([0,0], [50,0], [50,50], [0,50]),
                Slic3r::Polygon->new_scale([7.5,7.5], [7.5,12.5], [12.5,12.5], [12.5,7.5]),
                Slic3r::Polygon->new_scale([7.5,17.5], [7.5,22.5], [12.5,22.5], [12.5,17.5]),
                Slic3r::Polygon->new_scale([7.5,27.5], [7.5,32.5], [12.5,32.5], [12.5,27.5]),
                Slic3r::Polygon->new_scale([7.5,37.5], [7.5,42.5], [12.5,42.5], [12.5,37.5]),
                Slic3r::Polygon->new_scale([17.5,7.5], [17.5,12.5], [22.5,12.5], [22.5,7.5]),
            ),
        ],
        total       => 12,
        external    => 6,
        ext_order   => [0,1,0,1,0,1,0,1,0,1,0,1],
        cinternal   => 1,
        ccw         => 2,
        ccw_order   => [0,0,0,0,0,0,0,0,0,0,1,1],
        nesting     => [ [0,1],[2,3],[4,5],[6,7],[8,9] ],
    );
}

{
    my $config = Slic3r::Config::new_from_defaults;
    $config->set('skirts', 0);
    $config->set('fill_density', 0);
    $config->set('perimeters', 3);
    $config->set('top_solid_layers', 0);
    $config->set('bottom_solid_layers', 0);
    $config->set('cooling', [ 0 ]);                 # to prevent speeds from being altered
    $config->set('first_layer_speed', '100%');      # to prevent speeds from being altered
    
    {
        my $print = Slic3r::Test::init_print('overhang', config => $config);
        my $has_cw_loops = 0;
        my $cur_loop;
        Slic3r::GCode::Reader->new->parse(Slic3r::Test::gcode($print), sub {
            my ($self, $cmd, $args, $info) = @_;
            
            if ($info->{extruding} && $info->{dist_XY} > 0) {
                $cur_loop ||= [ [$self->X, $self->Y] ];
                push @$cur_loop, [ @$info{qw(new_X new_Y)} ];
            } else {
                if ($cur_loop) {
                    $has_cw_loops = 1 if Slic3r::Polygon->new(@$cur_loop)->is_clockwise;
                    $cur_loop = undef;
                }
            }
        });
        ok !$has_cw_loops, 'all perimeters extruded ccw';
    }
    
    foreach my $model (qw(cube_with_hole cube_with_concave_hole)) {
        $config->set('external_perimeter_speed', 68);
        my $print = Slic3r::Test::init_print(
            $model,
            config      => $config,
            duplicate   => 2,  # we test two copies to make sure ExtrusionLoop objects are not modified in-place (the second object would not detect cw loops and thus would calculate wrong inwards moves)
        );
        my $has_cw_loops = my $has_outwards_move = my $starts_on_convex_point = 0;
        my $cur_loop;
        my %external_loops = ();  # print_z => count of external loops
        Slic3r::GCode::Reader->new->parse(Slic3r::Test::gcode($print), sub {
            my ($self, $cmd, $args, $info) = @_;
            
            if ($info->{extruding} && $info->{dist_XY} > 0) {
                $cur_loop ||= [ [$self->X, $self->Y] ];
                push @$cur_loop, [ @$info{qw(new_X new_Y)} ];
            } else {
                if ($cur_loop) {
                    $has_cw_loops = 1 if Slic3r::Polygon->new_scale(@$cur_loop)->is_clockwise;
                    if ($self->F == $config->external_perimeter_speed*60) {
                        my $move_dest = Slic3r::Point->new_scale(@$info{qw(new_X new_Y)});
                        
                        # reset counter for second object
                        $external_loops{$self->Z} = 0
                            if defined($external_loops{$self->Z}) && $external_loops{$self->Z} == 2;
                        
                        $external_loops{$self->Z}++;
                        my $is_contour  = $external_loops{$self->Z} == 2;
                        my $is_hole     = $external_loops{$self->Z} == 1;
                        
                        my $loop = Slic3r::Polygon->new_scale(@$cur_loop);
                        my $loop_contains_point = $loop->contains_point($move_dest);
                        $has_outwards_move = 1
                            if (!$loop_contains_point && $is_contour)  # contour should include destination
                             || ($loop_contains_point && $is_hole);    # hole should not
                        
                        if ($model eq 'cube_with_concave_hole') {
                            # check that loop starts at a concave vertex
                            my $ccw_angle = $loop->first_point->ccw_angle(@$loop[-2,1]);
                            my $convex = ($ccw_angle > PI);  # whether the angle on the *right* side is convex
                            $starts_on_convex_point = 1
                                if ($convex && $is_contour) || (!$convex && $is_hole);
                        }
                    }
                    $cur_loop = undef;
                }
            }
        });
        ok !$has_cw_loops, 'all perimeters extruded ccw';
        ok !$has_outwards_move, 'move inwards after completing external loop';
        ok !$starts_on_convex_point, 'loops start on concave point if any';
    }
    
    {
        $config->set('perimeters', 1);
        $config->set('perimeter_speed', 77);
        $config->set('external_perimeter_speed', 66);
        $config->set('bridge_speed', 99);
        $config->set('cooling', [ 1 ]);
        $config->set('fan_below_layer_time', [ 0 ]);
        $config->set('slowdown_below_layer_time', [ 0 ]);
        $config->set('bridge_fan_speed', [ 100 ]);
        $config->set('bridge_flow_ratio', 33);  # arbitrary value
        $config->set('overhangs', 1);
        my $print = Slic3r::Test::init_print('overhang', config => $config);
        my %layer_speeds = ();  # print Z => [ speeds ]
        my $fan_speed = 0;
        my $bridge_mm_per_mm = ($config->nozzle_diameter->[0]**2) / ($config->filament_diameter->[0]**2) * $config->bridge_flow_ratio;
        Slic3r::GCode::Reader->new->parse(Slic3r::Test::gcode($print), sub {
            my ($self, $cmd, $args, $info) = @_;
            
            $fan_speed = 0 if $cmd eq 'M107';
            $fan_speed = $args->{S} if $cmd eq 'M106';
            if ($info->{extruding} && $info->{dist_XY} > 0) {
                $layer_speeds{$self->Z} ||= {};
                $layer_speeds{$self->Z}{my $feedrate = $args->{F} // $self->F} = 1;
                
                fail 'wrong speed found'
                    if $feedrate != $config->perimeter_speed*60
                        && $feedrate != $config->external_perimeter_speed*60
                        && $feedrate != $config->bridge_speed*60;
                
                if ($feedrate == $config->bridge_speed*60) {
                    fail 'printing overhang but fan is not enabled or running at wrong speed'
                        if $fan_speed != 255;
                    my $mm_per_mm = $info->{dist_E} / $info->{dist_XY};
                    fail 'wrong bridge flow' if abs($mm_per_mm - $bridge_mm_per_mm) > 0.01;
                } else {
                    fail 'fan is running when not supposed to'
                        if $fan_speed > 0;
                }
            }
        });
        is scalar(grep { keys %$_ > 1 } values %layer_speeds), 1,
            'only overhang layer has more than one speed';
    }
}

{
    my $config = Slic3r::Config::new_from_defaults;
    $config->set('skirts', 0);
    $config->set('perimeters', 3);
    $config->set('layer_height', 0.4);
    $config->set('first_layer_height', 0.35);
    $config->set('extra_perimeters', 1);
    $config->set('cooling', [ 0 ]);                 # to prevent speeds from being altered
    $config->set('first_layer_speed', '100%');      # to prevent speeds from being altered
    $config->set('perimeter_speed', 99);
    $config->set('external_perimeter_speed', 99);
    $config->set('small_perimeter_speed', 99);
    $config->set('thin_walls', 0);
    
    my $print = Slic3r::Test::init_print('ipadstand', config => $config);
    my %perimeters = ();  # z => number of loops
    my $in_loop = 0;
    Slic3r::GCode::Reader->new->parse(Slic3r::Test::gcode($print), sub {
        my ($self, $cmd, $args, $info) = @_;
        
        if ($info->{extruding} && $info->{dist_XY} > 0 && ($args->{F} // $self->F) == $config->perimeter_speed*60) {
            $perimeters{$self->Z}++ if !$in_loop;
            $in_loop = 1;
        } else {
            $in_loop = 0;
        }
    });
    ok !(grep { $_ % $config->perimeters } values %perimeters), 'no superfluous extra perimeters';
}

{
    my $config = Slic3r::Config::new_from_defaults;
    $config->set('nozzle_diameter', [0.4]);
    $config->set('perimeters', 2);
    $config->set('perimeter_extrusion_width', 0.4);
    $config->set('external_perimeter_extrusion_width', 0.4);
    $config->set('infill_extrusion_width', 0.53);
    $config->set('solid_infill_extrusion_width', 0.53);
    
    # we just need a pre-filled Print object
    my $print = Slic3r::Test::init_print('20mm_cube', config => $config);
    
    # override a layer's slices
    my $expolygon = Slic3r::ExPolygon->new([[-71974463,-139999376],[-71731792,-139987456],[-71706544,-139985616],[-71682119,-139982639],[-71441248,-139946912],[-71417487,-139942895],[-71379384,-139933984],[-71141800,-139874480],[-71105247,-139862895],[-70873544,-139779984],[-70838592,-139765856],[-70614943,-139660064],[-70581783,-139643567],[-70368368,-139515680],[-70323751,-139487872],[-70122160,-139338352],[-70082399,-139306639],[-69894800,-139136624],[-69878679,-139121327],[-69707992,-138933008],[-69668575,-138887343],[-69518775,-138685359],[-69484336,-138631632],[-69356423,-138418207],[-69250040,-138193296],[-69220920,-138128976],[-69137992,-137897168],[-69126095,-137860255],[-69066568,-137622608],[-69057104,-137582511],[-69053079,-137558751],[-69017352,-137317872],[-69014392,-137293456],[-69012543,-137268207],[-68999369,-137000000],[-63999999,-137000000],[-63705947,-136985551],[-63654984,-136977984],[-63414731,-136942351],[-63364756,-136929840],[-63129151,-136870815],[-62851950,-136771631],[-62585807,-136645743],[-62377483,-136520895],[-62333291,-136494415],[-62291908,-136463728],[-62096819,-136319023],[-62058644,-136284432],[-61878676,-136121328],[-61680968,-135903184],[-61650275,-135861807],[-61505591,-135666719],[-61354239,-135414191],[-61332211,-135367615],[-61228359,-135148063],[-61129179,-134870847],[-61057639,-134585262],[-61014451,-134294047],[-61000000,-134000000],[-61000000,-107999999],[-61014451,-107705944],[-61057639,-107414736],[-61129179,-107129152],[-61228359,-106851953],[-61354239,-106585808],[-61505591,-106333288],[-61680967,-106096816],[-61878675,-105878680],[-62096820,-105680967],[-62138204,-105650279],[-62333292,-105505591],[-62585808,-105354239],[-62632384,-105332207],[-62851951,-105228360],[-62900463,-105211008],[-63129152,-105129183],[-63414731,-105057640],[-63705947,-105014448],[-63999999,-105000000],[-68999369,-105000000],[-69012543,-104731792],[-69014392,-104706544],[-69017352,-104682119],[-69053079,-104441248],[-69057104,-104417487],[-69066008,-104379383],[-69125528,-104141799],[-69137111,-104105248],[-69220007,-103873544],[-69234136,-103838591],[-69339920,-103614943],[-69356415,-103581784],[-69484328,-103368367],[-69512143,-103323752],[-69661647,-103122160],[-69693352,-103082399],[-69863383,-102894800],[-69878680,-102878679],[-70066999,-102707992],[-70112656,-102668576],[-70314648,-102518775],[-70368367,-102484336],[-70581783,-102356424],[-70806711,-102250040],[-70871040,-102220919],[-71102823,-102137992],[-71139752,-102126095],[-71377383,-102066568],[-71417487,-102057104],[-71441248,-102053079],[-71682119,-102017352],[-71706535,-102014392],[-71731784,-102012543],[-71974456,-102000624],[-71999999,-102000000],[-104000000,-102000000],[-104025536,-102000624],[-104268207,-102012543],[-104293455,-102014392],[-104317880,-102017352],[-104558751,-102053079],[-104582512,-102057104],[-104620616,-102066008],[-104858200,-102125528],[-104894751,-102137111],[-105126455,-102220007],[-105161408,-102234136],[-105385056,-102339920],[-105418215,-102356415],[-105631632,-102484328],[-105676247,-102512143],[-105877839,-102661647],[-105917600,-102693352],[-106105199,-102863383],[-106121320,-102878680],[-106292007,-103066999],[-106331424,-103112656],[-106481224,-103314648],[-106515663,-103368367],[-106643575,-103581783],[-106749959,-103806711],[-106779080,-103871040],[-106862007,-104102823],[-106873904,-104139752],[-106933431,-104377383],[-106942896,-104417487],[-106946920,-104441248],[-106982648,-104682119],[-106985607,-104706535],[-106987456,-104731784],[-107000630,-105000000],[-112000000,-105000000],[-112294056,-105014448],[-112585264,-105057640],[-112870848,-105129184],[-112919359,-105146535],[-113148048,-105228360],[-113194624,-105250392],[-113414191,-105354239],[-113666711,-105505591],[-113708095,-105536279],[-113903183,-105680967],[-114121320,-105878679],[-114319032,-106096816],[-114349720,-106138200],[-114494408,-106333288],[-114645760,-106585808],[-114667792,-106632384],[-114771640,-106851952],[-114788991,-106900463],[-114870815,-107129151],[-114942359,-107414735],[-114985551,-107705943],[-115000000,-107999999],[-115000000,-134000000],[-114985551,-134294048],[-114942359,-134585263],[-114870816,-134870847],[-114853464,-134919359],[-114771639,-135148064],[-114645759,-135414192],[-114494407,-135666720],[-114319031,-135903184],[-114121320,-136121327],[-114083144,-136155919],[-113903184,-136319023],[-113861799,-136349712],[-113666711,-136494416],[-113458383,-136619264],[-113414192,-136645743],[-113148049,-136771631],[-112870848,-136870815],[-112820872,-136883327],[-112585264,-136942351],[-112534303,-136949920],[-112294056,-136985551],[-112000000,-137000000],[-107000630,-137000000],[-106987456,-137268207],[-106985608,-137293440],[-106982647,-137317872],[-106946920,-137558751],[-106942896,-137582511],[-106933991,-137620624],[-106874471,-137858208],[-106862888,-137894751],[-106779992,-138126463],[-106765863,-138161424],[-106660080,-138385055],[-106643584,-138418223],[-106515671,-138631648],[-106487855,-138676256],[-106338352,-138877839],[-106306647,-138917600],[-106136616,-139105199],[-106121320,-139121328],[-105933000,-139291999],[-105887344,-139331407],[-105685351,-139481232],[-105631632,-139515663],[-105418216,-139643567],[-105193288,-139749951],[-105128959,-139779072],[-104897175,-139862016],[-104860247,-139873904],[-104622616,-139933423],[-104582511,-139942896],[-104558751,-139946912],[-104317880,-139982656],[-104293463,-139985616],[-104268216,-139987456],[-104025544,-139999376],[-104000000,-140000000],[-71999999,-140000000]],[[-105000000,-138000000],[-105000000,-104000000],[-71000000,-104000000],[-71000000,-138000000]],[[-69000000,-132000000],[-69000000,-110000000],[-64991180,-110000000],[-64991180,-132000000]],[[-111008824,-132000000],[-111008824,-110000000],[-107000000,-110000000],[-107000000,-132000000]]);
    my $object = $print->print->objects->[0];
    $object->slice;
    my $layer = $object->get_layer(1);
    my $layerm = $layer->regions->[0];
    $layerm->slices->clear;
    $layerm->slices->append(Slic3r::Surface->new(surface_type => S_TYPE_INTERNAL, expolygon => $expolygon));
    
    # make perimeters
    $layer->make_perimeters;
    
    # compute the covered area
    my $pflow = $layerm->flow(FLOW_ROLE_PERIMETER);
    my $iflow = $layerm->flow(FLOW_ROLE_INFILL);
    my $covered_by_perimeters = union_ex([
        (map @{$_->polygon->split_at_first_point->grow($pflow->scaled_width/2)}, map @$_, @{$layerm->perimeters}),
    ]);
    my $covered_by_infill = union_ex([
        (map $_->p, @{$layerm->fill_surfaces}),
        (map @{$_->polyline->grow($iflow->scaled_width/2)}, @{$layerm->thin_fills}),
    ]);
    
    # compute the non covered area
    my $non_covered = diff(
        [ map @{$_->expolygon}, @{$layerm->slices} ],
        [ map @$_, (@$covered_by_perimeters, @$covered_by_infill) ],
    );
    
    if (0) {
        printf "max non covered = %f\n", List::Util::max(map unscale unscale $_->area, @$non_covered);
        require "Slic3r/SVG.pm";
        Slic3r::SVG::output(
            "gaps.svg",
            expolygons          => [ map $_->expolygon, @{$layerm->slices} ],
            red_expolygons      => union_ex([ map @$_, (@$covered_by_perimeters, @$covered_by_infill) ]),
            green_expolygons    => union_ex($non_covered),
            no_arrows           => 1,
            polylines           => [
                map $_->polygon->split_at_first_point, map @$_, @{$layerm->perimeters},
            ],
        );
    }
    ok !(defined first { $_->area > ($iflow->scaled_width**2) } @$non_covered), 'no gap between perimeters and infill';
}

{
    my $config = Slic3r::Config::new_from_defaults;
    $config->set('skirts', 0);
    $config->set('perimeters', 3);
    $config->set('layer_height', 0.4);
    $config->set('bridge_speed', 99);
    $config->set('fill_density', 0);                # to prevent bridging over sparse infill
    $config->set('overhangs', 1);
    $config->set('cooling', [ 0 ]);                 # to prevent speeds from being altered
    $config->set('first_layer_speed', '100%');      # to prevent speeds from being altered
    
    my $test = sub {
        my ($print) = @_;
        my %z_with_bridges = ();  # z => 1
        Slic3r::GCode::Reader->new->parse(Slic3r::Test::gcode($print), sub {
            my ($self, $cmd, $args, $info) = @_;
        
            if ($info->{extruding} && $info->{dist_XY} > 0) {
                $z_with_bridges{$self->Z} = 1 if ($args->{F} // $self->F) == $config->bridge_speed*60;
            }
        });
        return scalar keys %z_with_bridges;
    };
    ok $test->(Slic3r::Test::init_print('V', config => $config)) == 1,
        'no overhangs printed with bridge speed';  # except for the first internal solid layers above void
    ok $test->(Slic3r::Test::init_print('V', config => $config, scale_xyz => [3,1,1])) > 1,
        'overhangs printed with bridge speed';
}

{
    my $config = Slic3r::Config::new_from_defaults;
    $config->set('seam_position', 'random');
    my $print = Slic3r::Test::init_print('20mm_cube', config => $config);
    ok Slic3r::Test::gcode($print), 'successful generation of G-code with seam_position = random';
}

{
    my $test = sub {
        my ($model_name) = @_;
        my $config = Slic3r::Config::new_from_defaults;
        $config->set('seam_position', 'aligned');
        $config->set('skirts', 0);
        $config->set('perimeters', 1);
        $config->set('fill_density', 0);
        $config->set('top_solid_layers', 0);
        $config->set('bottom_solid_layers', 0);
        $config->set('retract_layer_change', [0]);
    
        my $was_extruding = 0;
        my @seam_points = ();
        my $print = Slic3r::Test::init_print($model_name, config => $config);
        Slic3r::GCode::Reader->new->parse(my $gcode = Slic3r::Test::gcode($print), sub {
            my ($self, $cmd, $args, $info) = @_;
    
            if ($info->{extruding}) {
                if (!$was_extruding) {
                    push @seam_points, Slic3r::Point->new_scale($self->X, $self->Y);
                }
                $was_extruding = 1;
            } else {
                $was_extruding = 0;
            }
        });
        my @dist = map unscale($_), map $seam_points[$_]->distance_to($seam_points[$_+1]), 0..($#seam_points-1);
        ok !(defined first { $_ > 3 } @dist), 'seam is aligned';
    };
    $test->('20mm_cube');
    $test->('small_dorito');
}

__END__