-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathmain.cpp
More file actions
611 lines (484 loc) · 34.4 KB
/
main.cpp
File metadata and controls
611 lines (484 loc) · 34.4 KB
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
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
// This example illustrates the basic of building an alignment model.
// The alignment is based on "Bridge Geometry Manual", April 2022
// US Department of Transportation, Federal Highway Administration (FHWA)
// https://www.fhwa.dot.gov/bridge/pubs/hif22034.pdf
//
// Sections and page number for this document are cited in the code comments.
// Disable warnings coming from IfcOpenShell
#pragma warning(disable:4018 4267 4250 4984 4985)
#include <ifcparse/IfcHierarchyHelper.h>
#include <ifcparse/Ifc4x3_add2.h>
#include <boost/math/constants/constants.hpp>
const double PI = boost::math::constants::pi<double>();
double to_radian(double deg) { return PI * deg / 180; }
#define Schema Ifc4x3_add2
// creates geometry and business logic segments for horizontal alignment tangent runs
std::pair<typename Schema::IfcCurveSegment*,typename Schema::IfcAlignmentSegment*> create_tangent(typename Schema::IfcCartesianPoint* p,double dir,double length)
{
// geometry
auto parent_curve = new Schema::IfcLine(
new Schema::IfcCartesianPoint(std::vector<double>({0,0})),
new Schema::IfcVector(new Schema::IfcDirection(std::vector<double>{1.0, 0.0}), 1.0));
auto curve_segment = new Schema::IfcCurveSegment(
Schema::IfcTransitionCode::IfcTransitionCode_CONTSAMEGRADIENT,
new Schema::IfcAxis2Placement2D(p, new Schema::IfcDirection(std::vector<double>{cos(dir), sin(dir)})),
new Schema::IfcLengthMeasure(0.0), // start
new Schema::IfcLengthMeasure(length),
parent_curve);
// business logic
auto design_parameters = new Schema::IfcAlignmentHorizontalSegment(
boost::none, boost::none, p, dir, 0.0, 0.0, length, boost::none,
Schema::IfcAlignmentHorizontalSegmentTypeEnum::IfcAlignmentHorizontalSegmentType_LINE);
auto alignment_segment = new Schema::IfcAlignmentSegment(
IfcParse::IfcGlobalId(), nullptr, boost::none, boost::none, boost::none, nullptr, nullptr, design_parameters);
return { curve_segment,alignment_segment };
}
// creates geometry and business logic segments for horizontal alignment horizonal curves
std::pair<typename Schema::IfcCurveSegment*, typename Schema::IfcAlignmentSegment*> create_hcurve(typename Schema::IfcCartesianPoint* pc, double dir, double radius,double lc)
{
// geometry
double sign = radius / fabs(radius);
auto parent_curve = new Schema::IfcCircle(
new Schema::IfcAxis2Placement2D(new Schema::IfcCartesianPoint(std::vector<double>({0, 0})), new Schema::IfcDirection(std::vector<double>{1, 0})),
fabs(radius));
auto curve_segment = new Schema::IfcCurveSegment(
Schema::IfcTransitionCode::IfcTransitionCode_CONTSAMEGRADIENT,
new Schema::IfcAxis2Placement2D(pc, new Schema::IfcDirection(std::vector<double>{cos(dir), sin(dir)})) ,
new Schema::IfcLengthMeasure(0.0),
new Schema::IfcLengthMeasure(sign * lc),
parent_curve);
// business logic
auto design_parameters = new Schema::IfcAlignmentHorizontalSegment(boost::none, boost::none, pc, dir, radius, radius, lc, boost::none, Schema::IfcAlignmentHorizontalSegmentTypeEnum::IfcAlignmentHorizontalSegmentType_CIRCULARARC);
auto alignment_segment = new Schema::IfcAlignmentSegment(IfcParse::IfcGlobalId(), nullptr,boost::none, boost::none, boost::none, nullptr, nullptr, design_parameters);
return { curve_segment,alignment_segment };
}
// creates geometry and business logic segments for vertical profile gradient runs
std::pair<typename Schema::IfcCurveSegment*, typename Schema::IfcAlignmentSegment*> create_gradient(typename Schema::IfcCartesianPoint* p,double slope,double length)
{
// geometry
auto parent_curve = new Schema::IfcLine(
new Schema::IfcCartesianPoint(std::vector<double>({0, 0})),
new Schema::IfcVector(new Schema::IfcDirection(std::vector<double>{1, 0}), 1.0));
auto curve_segment = new Schema::IfcCurveSegment(
Schema::IfcTransitionCode::IfcTransitionCode_CONTSAMEGRADIENT,
new Schema::IfcAxis2Placement2D(p, new Schema::IfcDirection(std::vector<double>{sqrt(1-slope*slope), slope})),
new Schema::IfcLengthMeasure(0.0), // start
new Schema::IfcLengthMeasure(length),
parent_curve);
// business logic
auto design_parameters = new Schema::IfcAlignmentVerticalSegment(boost::none, boost::none, p->Coordinates()[0], length, p->Coordinates()[1], slope, slope, boost::none, Schema::IfcAlignmentVerticalSegmentTypeEnum::IfcAlignmentVerticalSegmentType_CONSTANTGRADIENT);
auto alignment_segment = new Schema::IfcAlignmentSegment(IfcParse::IfcGlobalId(), nullptr, boost::none, boost::none, boost::none, nullptr, nullptr, design_parameters);
return { curve_segment,alignment_segment };
}
// creates geometry and business logic segments for vertical profile parabolic vertical curves
std::pair<typename Schema::IfcCurveSegment*, typename Schema::IfcAlignmentSegment*> create_vcurve(typename Schema::IfcCartesianPoint* p, double start_slope,double end_slope, double length)
{
// geometry
double A = 0.0;
double B = start_slope;
double C = (end_slope - start_slope) / (2 * length);
auto parent_curve = new Schema::IfcPolynomialCurve(
new Schema::IfcAxis2Placement2D(new Schema::IfcCartesianPoint(std::vector<double>{0.0, 0.0}), new Schema::IfcDirection(std::vector<double>{1.0, 0.0})),
std::vector<double>{0.0, 1.0},
std::vector<double>{A, B, C}, boost::none);
auto curve_segment = new Schema::IfcCurveSegment(
Schema::IfcTransitionCode::IfcTransitionCode_CONTSAMEGRADIENT,
new Schema::IfcAxis2Placement2D(p, new Schema::IfcDirection(std::vector<double>{1.0, 0.0})),
new Schema::IfcLengthMeasure(0.0),
new Schema::IfcLengthMeasure(length), parent_curve);
// business logic
double k = (end_slope - start_slope) / length;
auto design_parameters = new Schema::IfcAlignmentVerticalSegment(boost::none, boost::none, p->Coordinates()[0], length, p->Coordinates()[1], start_slope, end_slope, 1 / k, Schema::IfcAlignmentVerticalSegmentTypeEnum::IfcAlignmentVerticalSegmentType_PARABOLICARC);
auto alignment_segment = new Schema::IfcAlignmentSegment(IfcParse::IfcGlobalId(), nullptr, boost::none, boost::none, boost::none, nullptr, nullptr, design_parameters);
return { curve_segment,alignment_segment };
}
// creates representations for each IfcAlignmentSegment per CT 4.1.7.1.1.4
// https://standards.buildingsmart.org/IFC/RELEASE/IFC4_3/HTML/concepts/Product_Shape/Product_Geometric_Representation/Alignment_Geometry/Alignment_Geometry_-_Segments/content.html
void create_segment_representations(IfcHierarchyHelper<Schema>& file,Schema::IfcLocalPlacement* global_placement,Schema::IfcGeometricRepresentationSubContext* segment_axis_subcontext, typename aggregate_of<typename Schema::IfcSegment>::ptr curve_segments, typename aggregate_of<typename Schema::IfcObjectDefinition>::ptr segments)
{
auto cs_iter = curve_segments->begin();
auto s_iter = segments->begin();
for (; cs_iter != curve_segments->end(); cs_iter++, s_iter++)
{
auto curve_segment = *cs_iter;
auto alignment_segment = (*s_iter)->as<Schema::IfcAlignmentSegment>();
typename aggregate_of<typename Schema::IfcRepresentationItem>::ptr representation_items(new aggregate_of<typename Schema::IfcRepresentationItem>());
representation_items->push(curve_segment);
auto axis_representation = new Schema::IfcShapeRepresentation(segment_axis_subcontext, std::string("Axis"), std::string("Segment"), representation_items);
file.addEntity(axis_representation);
typename aggregate_of<typename Schema::IfcRepresentation>::ptr representations(new aggregate_of<typename Schema::IfcRepresentation>());
representations->push(axis_representation);
auto product = new Schema::IfcProductDefinitionShape(boost::none, boost::none, representations);
file.addEntity(product);
alignment_segment->setObjectPlacement(global_placement);
alignment_segment->setRepresentation(product);
}
}
int main()
{
IfcHierarchyHelper<Schema> file;
std::vector<std::string> file_description;
file_description.push_back("ViewDefinition[Alignment-basedReferenceView]");
file.header().file_description().description(file_description);
auto project = file.addProject();
project->setName(std::string("FHWA Bridge Geometry Manual Example Alignment"));
// set up project units for feet
// the call to file.addProject() sets up length units as millimeter.
auto units_in_context = project->UnitsInContext();
auto units = units_in_context->Units();
auto begin = units->begin();
auto iter = begin;
auto end = units->end();
for (; iter != end; iter++)
{
auto unit = *iter;
if (unit->as<Schema::IfcSIUnit>() && unit->as<Schema::IfcSIUnit>()->UnitType() == Schema::IfcUnitEnum::IfcUnit_LENGTHUNIT)
{
auto dimensions = new Schema::IfcDimensionalExponents(1, 0, 0, 0, 0, 0, 0);
file.addEntity(dimensions);
auto conversion_factor = new Schema::IfcMeasureWithUnit(new Schema::IfcLengthMeasure(304.80), unit->as<Schema::IfcSIUnit>());
file.addEntity(conversion_factor);
auto conversion_based_unit = new Schema::IfcConversionBasedUnit(dimensions, Schema::IfcUnitEnum::IfcUnit_LENGTHUNIT, "FEET", conversion_factor);
file.addEntity(conversion_based_unit);
units->remove(unit); // remove the millimeter unit
units->push(conversion_based_unit); // add the feet unit
units_in_context->setUnits(units); // update the UnitsInContext
break; // Done!, the length unit was found, so break out of the loop
}
}
auto geometric_representation_context = file.getRepresentationContext(std::string("Model")); // creates the representation context if it doesn't already exist
auto axis_model_representation_subcontext = new Schema::IfcGeometricRepresentationSubContext(std::string("Axis"), std::string("Model"), geometric_representation_context, boost::none, Schema::IfcGeometricProjectionEnum::IfcGeometricProjection_MODEL_VIEW, boost::none);
file.addEntity(axis_model_representation_subcontext);
auto global_placement = file.addLocalPlacement();
//
// Define horizontal alignment
//
// define key points
// B.1.4 pg 212
auto pob = file.addDoublet<Schema::IfcCartesianPoint>(500, 2500); // beginning
auto pc1 = file.addDoublet<Schema::IfcCartesianPoint>(2142.237995, 1436.014820); // Point of curve (PC), Curve #1
auto pt1 = file.addDoublet<Schema::IfcCartesianPoint>(3660.446123, 2050.736173); // Point of tangent (PT), Curve #1
auto pc2 = file.addDoublet<Schema::IfcCartesianPoint>(4084.115884, 3889.462938); // Point of curve (PC), Curve #2
auto pt2 = file.addDoublet<Schema::IfcCartesianPoint>(5469.395067, 4847.566310); // Point of tangent (PT), Curve #2
auto pc3 = file.addDoublet<Schema::IfcCartesianPoint>(7019.971367, 4638.286073); // Point of curve (PC), Curve #3
auto pt3 = file.addDoublet<Schema::IfcCartesianPoint>(7790.932128, 4006.730765); // Point of tangent (PT), Curve #3
auto poe = file.addDoublet<Schema::IfcCartesianPoint>(8480, 2010); // ending
// define tangent runs and curve lengths
double run_1 = 1956.785654;
double lc_1 = 1919.222667;
double run_2 = 1886.905454;
double lc_2 = 1848.115835;
double run_3 = 1564.635765;
double lc_3 = 1049.119737;
double run_4 = 2112.285084;
// define curve radii
double rc_1 = 1000;
double rc_2 = -1250; // negative radius for curves to the right
double rc_3 = -950;
// bearing of tangents
double angle_1 = to_radian(327.0613);
double angle_2 = to_radian(77.0247);
double angle_3 = to_radian(352.3133);
double angle_4 = to_radian(289.0395);
// create containers to store the curve segments
typename aggregate_of<typename Schema::IfcSegment>::ptr horizontal_curve_segments(new aggregate_of<typename Schema::IfcSegment>()); // geometry
typename aggregate_of<typename Schema::IfcObjectDefinition>::ptr horizontal_segments(new aggregate_of<typename Schema::IfcObjectDefinition>()); // business logic
//
// Build the horizontal alignment segments
//
// POB to PC1
auto curve_segment_1 = create_tangent(pob, angle_1, run_1);
horizontal_curve_segments->push(curve_segment_1.first);
horizontal_segments->push(curve_segment_1.second);
// Curve 1
auto curve_segment_2 = create_hcurve(pc1, angle_1,rc_1,lc_1);
horizontal_curve_segments->push(curve_segment_2.first);
horizontal_segments->push(curve_segment_2.second);
// PT1 to PC2
auto curve_segment_3 = create_tangent(pt1, angle_2, run_2);
horizontal_curve_segments->push(curve_segment_3.first);
horizontal_segments->push(curve_segment_3.second);
// Curve 2
auto curve_segment_4 = create_hcurve(pc2, angle_2, rc_2, lc_2);
horizontal_curve_segments->push(curve_segment_4.first);
horizontal_segments->push(curve_segment_4.second);
// PT2 to PC3
auto curve_segment_5 = create_tangent(pt2, angle_3, run_3);
horizontal_curve_segments->push(curve_segment_5.first);
horizontal_segments->push(curve_segment_5.second);
// Curve 3
auto curve_segment_6 = create_hcurve(pc3, angle_3, rc_3, lc_3);
horizontal_curve_segments->push(curve_segment_6.first);
horizontal_segments->push(curve_segment_6.second);
// PT3 to POE
auto curve_segment_7 = create_tangent(pt3, angle_4, run_4);
horizontal_curve_segments->push(curve_segment_7.first);
horizontal_segments->push(curve_segment_7.second);
// Zero-length terminator segment
auto terminator_segment = create_tangent(poe, angle_4, 0.0);
terminator_segment.first->setTransition(Schema::IfcTransitionCode::IfcTransitionCode_DISCONTINUOUS);
horizontal_curve_segments->push(terminator_segment.first);
horizontal_segments->push(terminator_segment.second);
//
// Create the horizontal alignment (IfcAlignmentHorizontal) and nest alignment segments
//
auto horizontal_alignment = new Schema::IfcAlignmentHorizontal(IfcParse::IfcGlobalId(), nullptr, std::string("Horizontal Alignment"), boost::none, boost::none, nullptr, nullptr);
file.addEntity(horizontal_alignment);
auto nests_horizontal_segments = new Schema::IfcRelNests(IfcParse::IfcGlobalId(), nullptr, boost::none, std::string("Nests horizontal alignment segments with horizontal alignment"), horizontal_alignment, horizontal_segments);
file.addEntity(nests_horizontal_segments);
//
// Create plan view footprint model representation for the horizontal alignment
//
// start by defining a composite curve composed of the horizonal curve segments
auto composite_curve = new Schema::IfcCompositeCurve(horizontal_curve_segments, false /*not self-intersecting*/);
file.addEntity(composite_curve);
// the composite curve is a representation item
typename aggregate_of<typename Schema::IfcRepresentationItem>::ptr alignment_representation_items(new aggregate_of<typename Schema::IfcRepresentationItem>());
alignment_representation_items->push(composite_curve);
// create the footprint representation
auto footprint_shape_representation = new Schema::IfcShapeRepresentation(axis_model_representation_subcontext, std::string("FootPrint"), std::string("Curve2D"), alignment_representation_items);
file.addEntity(footprint_shape_representation);
//
// Define vertical profile segments
//
// create containers to store the curve segments
typename aggregate_of<typename Schema::IfcSegment>::ptr vertical_curve_segments(new aggregate_of<typename Schema::IfcSegment>()); // geometry
typename aggregate_of<typename Schema::IfcObjectDefinition>::ptr vertical_segments(new aggregate_of<typename Schema::IfcObjectDefinition>()); // business logic
// define key profile points
auto vpob = file.addDoublet<Schema::IfcCartesianPoint>(0.0, 100.0); // beginning
auto vpc1 = file.addDoublet<Schema::IfcCartesianPoint>(1200.0, 121.0); // Vertical Curve Point (VPC), Vertical Curve #1
auto vpt1 = file.addDoublet<Schema::IfcCartesianPoint>(2800.0, 127.0); // Vertical Curve Tangent (VPT), Vertical Curve #1
auto vpc2 = file.addDoublet<Schema::IfcCartesianPoint>(4400.0, 111.0); // Vertical Curve Point (VPC), Vertical Curve #2
auto vpt2 = file.addDoublet<Schema::IfcCartesianPoint>(5600.0, 117.0); // Vertical Curve Tangent (VPT), Vertical Curve #2
auto vpc3 = file.addDoublet<Schema::IfcCartesianPoint>(6400.0, 133.0); // Vertical Curve Point (VPC), Vertical Curve #3
auto vpt3 = file.addDoublet<Schema::IfcCartesianPoint>(8400.0, 133.0); // Vertical Curve Tangent (VPT), Vertical Curve #3
auto vpc4 = file.addDoublet<Schema::IfcCartesianPoint>(9400.0, 113.0); // Vertical Curve Point (VPC), Vertical Curve #4
auto vpt4 = file.addDoublet<Schema::IfcCartesianPoint>(10200.0, 103.0); // Vertical Curve Tangent (VPT), Vertical Curve #4
//auto vpoe = file.addDoublet<Schema::IfcCartesianPoint>(12800.0, 90.0); // ending (this point is beyond the end of the horizontal alignment)
auto vpoe = file.addDoublet<Schema::IfcCartesianPoint>(12337.05, 94.31475); // corresponds to end of horizontal alignment
//
// Build the vertical alignment segments
//
// Grade start to VPC1
auto vertical_profile_segment_1 = create_gradient(vpob, 1.75 / 100, 1200);
vertical_curve_segments->push(vertical_profile_segment_1.first);
vertical_segments->push(vertical_profile_segment_1.second);
// Vertical Curve 1
auto vertical_profile_segment_2 = create_vcurve(vpc1, 1.75 / 100, -1.0 / 100, 1600);
vertical_curve_segments->push(vertical_profile_segment_2.first);
vertical_segments->push(vertical_profile_segment_2.second);
// Grade VPT1 to VPC2
auto vertical_profile_segment_3 = create_gradient(vpt1, -1.0 / 100, 1600);
vertical_curve_segments->push(vertical_profile_segment_3.first);
vertical_segments->push(vertical_profile_segment_3.second);
// Vertical Curve 2
auto vertical_profile_segment_4 = create_vcurve(vpc2, -1.0 / 100, 2.0 / 100, 1200);
vertical_curve_segments->push(vertical_profile_segment_4.first);
vertical_segments->push(vertical_profile_segment_4.second);
// Grade PVT2 to VPC3
auto vertical_profile_segment_5 = create_gradient(vpt2, 2.0 / 100, 800);
vertical_curve_segments->push(vertical_profile_segment_5.first);
vertical_segments->push(vertical_profile_segment_5.second);
// Vertical Curve 3
auto vertical_profile_segment_6 = create_vcurve(vpc3, 2.0 / 100, -2.0 / 100, 2000);
vertical_curve_segments->push(vertical_profile_segment_6.first);
vertical_segments->push(vertical_profile_segment_6.second);
// Grade PVT3 to VPC4
auto vertical_profile_segment_7 = create_gradient(vpt3, -2.0 / 100, 1000);
vertical_curve_segments->push(vertical_profile_segment_7.first);
vertical_segments->push(vertical_profile_segment_7.second);
// Vertical Curve 4
auto vertical_profile_segment_8 = create_vcurve(vpc4, -2.0 / 100, -0.5 / 100, 800);
vertical_curve_segments->push(vertical_profile_segment_8.first);
vertical_segments->push(vertical_profile_segment_8.second);
// Grade VPT4 to End
auto vertical_profile_segment_9 = create_gradient(vpt4, -0.5 / 100, /*2600*/2137.05); // 2600 is stated in example, but 2137.05 corresponds with the end of the horizontal alignment
vertical_curve_segments->push(vertical_profile_segment_9.first);
vertical_segments->push(vertical_profile_segment_9.second);
// Zero-length terminator
auto vertical_terminator_segment = create_gradient(vpoe, -0.5 / 100, 0.0);
vertical_curve_segments->push(vertical_terminator_segment.first);
vertical_segments->push(vertical_terminator_segment.second);
//
// Create the vertical alignment (IfcAlignmentVertical) and nest alignment segments
//
auto vertical_profile = new Schema::IfcAlignmentVertical(IfcParse::IfcGlobalId(), nullptr, std::string("Vertical Alignment"), boost::none, boost::none, nullptr, nullptr);
file.addEntity(vertical_profile);
auto nests_vertical_segments = new Schema::IfcRelNests(IfcParse::IfcGlobalId(), nullptr, boost::none, std::string("Nests vertical alignment segments with vertical alignment"), vertical_profile, vertical_segments);
file.addEntity(nests_vertical_segments);
//
// Create profile view axis model representation for the vertical profile
//
// start by defining a gradient curve composed of the vertical curve segments and associated with the horizontal composite curve
auto gradient_curve = new Schema::IfcGradientCurve(vertical_curve_segments, false, composite_curve, nullptr);
// the gradient curve is a representation item
typename aggregate_of<typename Schema::IfcRepresentationItem>::ptr profile_representation_items(new aggregate_of<typename Schema::IfcRepresentationItem>());
profile_representation_items->push(gradient_curve);
// create the axis representation
auto axis3d_shape_representation = new Schema::IfcShapeRepresentation(axis_model_representation_subcontext, std::string("Axis"), std::string("Curve3D"), profile_representation_items);
file.addEntity(axis3d_shape_representation);
// create axis representations for each segment
create_segment_representations(file, global_placement, axis_model_representation_subcontext, horizontal_curve_segments, horizontal_segments);
create_segment_representations(file, global_placement, axis_model_representation_subcontext, vertical_curve_segments, vertical_segments);
//
// Superelevation
//
auto surface_model_representation_subcontext = new Schema::IfcGeometricRepresentationSubContext(std::string("Surface"), std::string("Model"), geometric_representation_context, boost::none, Schema::IfcGeometricProjectionEnum::IfcGeometricProjection_MODEL_VIEW, boost::none);
file.addEntity(surface_model_representation_subcontext);
typename aggregate_of<typename Schema::IfcProfileDef>::ptr cross_sections(new aggregate_of<typename Schema::IfcProfileDef>()); // container of roadway cross sections
typename aggregate_of<typename Schema::IfcAxis2PlacementLinear>::ptr cross_section_positions( new aggregate_of<typename Schema::IfcAxis2PlacementLinear>()); // container of positions where cross sections are located
typename aggregate_of<typename Schema::IfcObjectDefinition>::ptr superelevation_referents(new aggregate_of<typename Schema::IfcObjectDefinition>()); // container of referents for superelevation events
double w = 23.5; // half bridge width
// distance along horizontal alignment, left slope, right slope
std::vector<std::tuple<double, double, double>> superelevation_data
{
// Beginning of alignment
{0.0, -0.02, +0.02},
// Curve 1
{1776.79, -0.02, +0.02}, // normal crown
{1896.79, -0.02, -0.02}, // begin full super
{2016.79, -0.06, -0.06}, // begin max super
{3816.01, -0.06, -0.06}, // end max super
{3936.01, -0.02, -0.02}, // end full super
{4056.01, -0.02, +0.02}, // normal crown
// Curve 2
{5602.91, -0.02, +0.02},
{5700.91, +0.02, +0.02},
{5812.91, +0.05, +0.05},
{7561.03, +0.05, +0.05},
{7651.03, +0.02, +0.02},
{7771.03, -0.02, +0.02},
// Curve 3
{ 8965.65, -0.02, +0.02},
{ 9085.65, +0.02, +0.02},
{ 9250.65, +0.075, +0.075},
{10149.77, +0.075, +0.075},
{10314.77, +0.02, +0.02},
{10434.77, -0.02, +0.02},
// End of alignment
{12337.05, -0.02, +0.02},
};
// PEnum_SideType definition
typename aggregate_of<typename Schema::IfcValue>::ptr side_type_enum_values(new aggregate_of<typename Schema::IfcValue>());
side_type_enum_values->push(new Schema::IfcLabel(std::string("LEFT")));
side_type_enum_values->push(new Schema::IfcLabel(std::string("RIGHT")));
side_type_enum_values->push(new Schema::IfcLabel(std::string("BOTH")));
auto PEnum_SideType = new Schema::IfcPropertyEnumeration(std::string("PEnum_SideType"), side_type_enum_values, nullptr);
for (const auto& [dist, left_slope, right_slope] : superelevation_data)
{
// create surface cross section and placement (geometric definition)
auto pde = new Schema::IfcPointByDistanceExpression(new Schema::IfcLengthMeasure(dist), boost::none, boost::none, boost::none, gradient_curve);
auto axis_placement = new Schema::IfcAxis2PlacementLinear(pde, nullptr, nullptr);
cross_section_positions->push(axis_placement);
cross_sections->push(new Schema::IfcOpenCrossProfileDef(Schema::IfcProfileTypeEnum::IfcProfileType_CURVE, boost::none, true, std::vector<double>({ w,w }), std::vector<double>({ left_slope, right_slope }), boost::none, nullptr));
// create referents for superelevation information (business logic)
typename aggregate_of<typename Schema::IfcObjectDefinition>::ptr referents_for_left_side_property_set(new aggregate_of<typename Schema::IfcObjectDefinition>());
typename aggregate_of<typename Schema::IfcObjectDefinition>::ptr referents_for_right_side_property_set(new aggregate_of<typename Schema::IfcObjectDefinition>());
// at each superelevation data point, there needs to be a referent for the left and right side superelevation event
auto left_referent = new Schema::IfcReferent(IfcParse::IfcGlobalId(), nullptr, boost::none, boost::none, boost::none,
new Schema::IfcLinearPlacement(global_placement, axis_placement, nullptr),
nullptr, Schema::IfcReferentTypeEnum::IfcReferentType_SUPERELEVATIONEVENT);
auto right_referent = new Schema::IfcReferent(IfcParse::IfcGlobalId(), nullptr, boost::none, boost::none, boost::none,
new Schema::IfcLinearPlacement(global_placement, axis_placement, nullptr),
nullptr, Schema::IfcReferentTypeEnum::IfcReferentType_SUPERELEVATIONEVENT);
referents_for_left_side_property_set->push(left_referent);
referents_for_right_side_property_set->push(right_referent);
superelevation_referents->push(left_referent);
superelevation_referents->push(right_referent);
{
// define and assign property set (Pset_Superelevation) for the left side slope
typename aggregate_of<typename Schema::IfcProperty>::ptr pset_superelevation_properties(new aggregate_of<typename Schema::IfcProperty>());
typename aggregate_of<typename Schema::IfcValue>::ptr enum_value(new aggregate_of<typename Schema::IfcValue>());
enum_value->push(new Schema::IfcLabel(std::string("LEFT")));
pset_superelevation_properties->push(new Schema::IfcPropertyEnumeratedValue(std::string("Side"), boost::none, enum_value, PEnum_SideType));
pset_superelevation_properties->push(new Schema::IfcPropertySingleValue(std::string("Superelevation"), boost::none, new Schema::IfcRatioMeasure(left_slope), nullptr));
auto property_set = new Schema::IfcPropertySet(IfcParse::IfcGlobalId(), nullptr, std::string("Pset_Superelevation"), boost::none, pset_superelevation_properties);
auto rel_defines_by_properties = new Schema::IfcRelDefinesByProperties(IfcParse::IfcGlobalId(), nullptr, boost::none, boost::none, referents_for_left_side_property_set, property_set);
file.addEntity(rel_defines_by_properties);
}
{
// define and assign property set (Pset_Superelevation) for the right side slope
typename aggregate_of<typename Schema::IfcProperty>::ptr pset_superelevation_properties(new aggregate_of<typename Schema::IfcProperty>());
typename aggregate_of<typename Schema::IfcValue>::ptr enum_value(new aggregate_of<typename Schema::IfcValue>());
enum_value->push(new Schema::IfcLabel(std::string("RIGHT")));
pset_superelevation_properties->push(new Schema::IfcPropertyEnumeratedValue(std::string("Side"), boost::none, enum_value, PEnum_SideType));
pset_superelevation_properties->push(new Schema::IfcPropertySingleValue(std::string("Superelevation"), boost::none, new Schema::IfcRatioMeasure(right_slope), nullptr));
auto property_set = new Schema::IfcPropertySet(IfcParse::IfcGlobalId(), nullptr, std::string("Pset_Superelevation"), boost::none, pset_superelevation_properties);
auto rel_defines_by_properties = new Schema::IfcRelDefinesByProperties(IfcParse::IfcGlobalId(), nullptr, boost::none, boost::none, referents_for_right_side_property_set, property_set);
file.addEntity(rel_defines_by_properties);
}
}
auto sectioned_surface = new Schema::IfcSectionedSurface(gradient_curve, cross_section_positions, cross_sections);
typename aggregate_of<typename Schema::IfcRepresentationItem>::ptr surface_representation_items(new aggregate_of<typename Schema::IfcRepresentationItem>());
surface_representation_items->push(sectioned_surface);
auto surface_representation = new Schema::IfcShapeRepresentation(surface_model_representation_subcontext, std::string("Surface"), std::string("SectionedSurface"), surface_representation_items);
//
// Create the IfcAlignment
//
// the alignment has two representations, a plan view footprint and a 3d curve
typename aggregate_of<typename Schema::IfcRepresentation>::ptr alignment_representations(new aggregate_of<typename Schema::IfcRepresentation>());
alignment_representations->push(footprint_shape_representation); // 2D footprint
alignment_representations->push(axis3d_shape_representation); // 3D curve
alignment_representations->push(surface_representation); // Surface
// create the alignment product definition
auto alignment_product = new Schema::IfcProductDefinitionShape(std::string("Alignment Product Definition Shape"), boost::none, alignment_representations);
// create the alignment
auto alignment = new Schema::IfcAlignment(IfcParse::IfcGlobalId(), nullptr, std::string("Example Alignment"), boost::none, boost::none, global_placement, alignment_product, boost::none);
file.addEntity(alignment);
// add stationing information to the alignment
typename aggregate_of<typename Schema::IfcProperty>::ptr pset_station_properties(new aggregate_of<typename Schema::IfcProperty>());
pset_station_properties->push(new Schema::IfcPropertySingleValue(std::string("Station"), boost::none, new Schema::IfcLengthMeasure(10000.00), nullptr));
auto property_set = new Schema::IfcPropertySet(IfcParse::IfcGlobalId(), nullptr, std::string("Pset_Stationing"), boost::none, pset_station_properties);
file.addEntity(property_set);
auto stationing_referent = new Schema::IfcReferent(IfcParse::IfcGlobalId(), nullptr, std::string("Start of alignment station"), boost::none, boost::none,
new Schema::IfcLinearPlacement(global_placement,
new Schema::IfcAxis2PlacementLinear(new Schema::IfcPointByDistanceExpression(new Schema::IfcLengthMeasure(0.0), boost::none,boost::none,boost::none,gradient_curve),nullptr,nullptr),
nullptr),
nullptr, Schema::IfcReferentTypeEnum::IfcReferentType_STATION);
file.addEntity(stationing_referent);
typename aggregate_of<typename Schema::IfcObjectDefinition>::ptr related_stationing_objects(new aggregate_of<typename Schema::IfcObjectDefinition>());
related_stationing_objects->push(stationing_referent);
auto nests_stationing = new Schema::IfcRelNests(IfcParse::IfcGlobalId(), nullptr, std::string("Nests Referents with station information with alignment"), boost::none, alignment, related_stationing_objects);
file.addEntity(nests_stationing);
auto rel_defines_by_properties = new Schema::IfcRelDefinesByProperties(IfcParse::IfcGlobalId(), nullptr, std::string("Relates station property set to referent"), boost::none, related_stationing_objects, property_set);
file.addEntity(rel_defines_by_properties);
auto nests_superelevations = new Schema::IfcRelNests(IfcParse::IfcGlobalId(), nullptr, std::string("Nests Referents with superelevation information with alignment"), boost::none, alignment, superelevation_referents);
file.addEntity(nests_superelevations);
// Nest the IfcAlignmentHorizontal and IfcAlignmentVertical with the IfcAlignment to complete the business logic
// 4.1.4.4.1 Alignments nest horizontal and vertical layouts
// https://standards.buildingsmart.org/IFC/RELEASE/IFC4_3/HTML/concepts/Object_Composition/Nesting/Alignment_Layouts/content.html
typename aggregate_of<typename Schema::IfcObjectDefinition>::ptr alignment_layout_list(new aggregate_of<typename Schema::IfcObjectDefinition>());
alignment_layout_list->push(horizontal_alignment);
alignment_layout_list->push(vertical_profile);
auto nests_alignment_layouts = new Schema::IfcRelNests(IfcParse::IfcGlobalId(), nullptr, std::string("Nest horizontal and vertical alignment layouts with the alignment"), boost::none, alignment, alignment_layout_list);
file.addEntity(nests_alignment_layouts);
// Define the relationship with the project
// IFC 4.1.4.1.1 "Every IfcAlignment must be related to IfcProject using the IfcRelAggregates relationship"
// https://standards.buildingsmart.org/IFC/RELEASE/IFC4_3/HTML/concepts/Object_Composition/Aggregation/Alignment_Aggregation_To_Project/content.html
// IfcProject <-> IfcRelAggregates <-> IfcAlignment
typename aggregate_of<typename Schema::IfcObjectDefinition>::ptr list_of_alignments_in_project(new aggregate_of<typename Schema::IfcObjectDefinition>());
list_of_alignments_in_project->push(alignment);
auto aggregate_alignments_with_project = new Schema::IfcRelAggregates(IfcParse::IfcGlobalId(), nullptr, std::string("Alignments in project"), boost::none, project, list_of_alignments_in_project);
file.addEntity(aggregate_alignments_with_project);
// Define the spatial structure of the alignment with respect to the site
// IFC 4.1.5.1 alignment is referenced in spatial structure of an IfcSpatialElement. In this case IfcSite is the highest level IfcSpatialElement
// https://standards.buildingsmart.org/IFC/RELEASE/IFC4_3/HTML/concepts/Object_Connectivity/Alignment_Spatial_Reference/content.html
// IfcSite <-> IfcRelReferencedInSpatialStructure <-> IfcAlignment
// This means IfcAlignment is not part of the IfcSite (it is not an aggregate component) but instead IfcAlignment is used within
// the IfcSite by reference. This implies an IfcAlignment can traverse many IfcSite instances within an IfcProject
typename Schema::IfcSpatialReferenceSelect::list::ptr list_alignments_referenced_in_site(new Schema::IfcSpatialReferenceSelect::list);
list_alignments_referenced_in_site->push(alignment);
// this alignment traverse 3 bridge sites.
for (int i = 1; i <= 3; i++)
{
std::ostringstream os;
os << "Site of Bridge " << i;
auto site = file.addSite(project, nullptr);
site->setName(os.str());
auto rel_referenced_in_spatial_structure = new Schema::IfcRelReferencedInSpatialStructure(IfcParse::IfcGlobalId(), nullptr, boost::none, boost::none, list_alignments_referenced_in_site, site);
file.addEntity(rel_referenced_in_spatial_structure);
}
// That's it - save the model to a file
std::ofstream ofs("FHWA_Bridge_Geometry_Alignment_Example.ifc");
ofs << file;
}