0027692: Visualization, AIS_AngleDimension - exterior angle and arrows visibility...
[occt.git] / src / STEPControl / STEPControl_Reader.cxx
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973c2be1 1// Copyright (c) 1999-2014 OPEN CASCADE SAS
b311480e 2//
973c2be1 3// This file is part of Open CASCADE Technology software library.
b311480e 4//
d5f74e42 5// This library is free software; you can redistribute it and/or modify it under
6// the terms of the GNU Lesser General Public License version 2.1 as published
973c2be1 7// by the Free Software Foundation, with special exception defined in the file
8// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
9// distribution for complete text of the license and disclaimer of any warranty.
b311480e 10//
973c2be1 11// Alternatively, this file may be used under the terms of Open CASCADE
12// commercial license or contractual agreement.
b311480e 13
7fd59977 14
7fd59977 15#include <Interface_EntityIterator.hxx>
16#include <Interface_Graph.hxx>
42cf5bc1 17#include <Interface_ShareFlags.hxx>
7fd59977 18#include <Interface_Static.hxx>
7fd59977 19#include <StepBasic_ApplicationContext.hxx>
42cf5bc1 20#include <StepBasic_ConversionBasedUnit.hxx>
7fd59977 21#include <StepBasic_DocumentProductEquivalence.hxx>
d402d481 22#include <StepBasic_HArray1OfNamedUnit.hxx>
d402d481 23#include <StepBasic_LengthMeasureWithUnit.hxx>
42cf5bc1 24#include <StepBasic_MeasureWithUnit.hxx>
25#include <StepBasic_NamedUnit.hxx>
d402d481 26#include <StepBasic_PlaneAngleMeasureWithUnit.hxx>
42cf5bc1 27#include <StepBasic_ProductDefinition.hxx>
28#include <StepBasic_ProductDefinitionContext.hxx>
29#include <StepBasic_ProductDefinitionFormation.hxx>
30#include <StepBasic_ProductDefinitionFormationRelationship.hxx>
31#include <StepBasic_ProductDefinitionWithAssociatedDocuments.hxx>
32#include <StepBasic_SiPrefix.hxx>
33#include <StepBasic_SiUnit.hxx>
34#include <StepBasic_SiUnitAndLengthUnit.hxx>
d402d481 35#include <StepBasic_SiUnitAndPlaneAngleUnit.hxx>
36#include <StepBasic_SiUnitAndSolidAngleUnit.hxx>
42cf5bc1 37#include <StepBasic_SiUnitName.hxx>
38#include <StepBasic_SolidAngleMeasureWithUnit.hxx>
39#include <StepBasic_SolidAngleUnit.hxx>
40#include <STEPConstruct_UnitContext.hxx>
42cf5bc1 41#include <STEPControl_Controller.hxx>
42#include <STEPControl_Reader.hxx>
d402d481 43#include <StepData_StepModel.hxx>
42cf5bc1 44#include <StepGeom_GeometricRepresentationContextAndGlobalUnitAssignedContext.hxx>
45#include <StepGeom_GeomRepContextAndGlobUnitAssCtxAndGlobUncertaintyAssCtx.hxx>
46#include <StepRepr_GlobalUncertaintyAssignedContext.hxx>
47#include <StepRepr_GlobalUnitAssignedContext.hxx>
48#include <StepRepr_MappedItem.hxx>
49#include <StepRepr_NextAssemblyUsageOccurrence.hxx>
50#include <StepRepr_ProductDefinitionShape.hxx>
51#include <StepRepr_PropertyDefinition.hxx>
d402d481 52#include <StepRepr_RepresentationContext.hxx>
42cf5bc1 53#include <StepRepr_RepresentationMap.hxx>
54#include <StepRepr_RepresentationRelationship.hxx>
55#include <StepRepr_ShapeAspect.hxx>
c6f530b8 56#include <StepShape_ManifoldSolidBrep.hxx>
42cf5bc1 57#include <StepShape_ShapeDefinitionRepresentation.hxx>
58#include <StepShape_ShapeRepresentation.hxx>
c6f530b8 59#include <StepShape_ShellBasedSurfaceModel.hxx>
42cf5bc1 60#include <TCollection_AsciiString.hxx>
d402d481 61#include <TColStd_Array1OfAsciiString.hxx>
62#include <TColStd_Array1OfReal.hxx>
42cf5bc1 63#include <TColStd_HSequenceOfTransient.hxx>
64#include <TColStd_MapOfAsciiString.hxx>
65#include <TColStd_SequenceOfAsciiString.hxx>
66#include <Transfer_TransientProcess.hxx>
67#include <XSControl_Controller.hxx>
68#include <XSControl_TransferReader.hxx>
69#include <XSControl_WorkSession.hxx>
70
7fd59977 71//=======================================================================
72//function : STEPControl_Reader
73//purpose :
74//=======================================================================
7fd59977 75STEPControl_Reader::STEPControl_Reader ()
76{
77 STEPControl_Controller::Init();
78 SetNorm ("STEP");
79}
80
81//=======================================================================
82//function : STEPControl_Reader
83//purpose :
84//=======================================================================
85
86STEPControl_Reader::STEPControl_Reader
87 (const Handle(XSControl_WorkSession)& WS, const Standard_Boolean scratch)
88{
89 STEPControl_Controller::Init();
90 SetWS (WS,scratch);
91 SetNorm ("STEP");
92}
93
94//=======================================================================
95//function : StepModel
96//purpose :
97//=======================================================================
98
99Handle(StepData_StepModel) STEPControl_Reader::StepModel () const
100{
101 return Handle(StepData_StepModel)::DownCast(Model());
102}
103
104//=======================================================================
105//function : TransferRoot
106//purpose :
107//=======================================================================
108
109Standard_Boolean STEPControl_Reader::TransferRoot (const Standard_Integer num)
110{
111 return TransferOneRoot (num);
112}
113
114//=======================================================================
115//function : NbRootsForTransfer
116//purpose :
117//=======================================================================
118
119Standard_Integer STEPControl_Reader::NbRootsForTransfer()
120{
121 if (therootsta) return theroots.Length();
122 therootsta = Standard_True;
123
124 //theroots.Clear();
125 Standard_Integer nb = Model()->NbEntities();
126 for (Standard_Integer i = 1; i <= nb; i ++) {
127 Handle(Standard_Transient) ent = Model()->Value(i);
c6f530b8 128 if (Interface_Static::IVal("read.step.all.shapes") == 1) {
129 // Special case to read invalid shape_representation without links to shapes.
130 if (ent->IsKind(STANDARD_TYPE(StepShape_ManifoldSolidBrep))) {
131 Interface_EntityIterator aShareds = WS()->Graph().Sharings(ent);
132 if (!aShareds.More()) {
133 theroots.Append(ent);
134 WS()->TransferReader()->TransientProcess()->RootsForTransfer()->Append(ent);
135 }
136 }
137 if (ent->IsKind(STANDARD_TYPE(StepShape_ShellBasedSurfaceModel))) {
138 Interface_EntityIterator aShareds = WS()->Graph().Sharings(ent);
139 if (!aShareds.More()) {
140 theroots.Append(ent);
141 WS()->TransferReader()->TransientProcess()->RootsForTransfer()->Append(ent);
142 }
143 }
144 }
7fd59977 145 if(ent->IsKind(STANDARD_TYPE(StepBasic_ProductDefinition))) {
146 // PTV 31.01.2003 TRJ11 exclude Product Definition With Associated Document from roots
147 if (ent->IsKind(STANDARD_TYPE(StepBasic_ProductDefinitionWithAssociatedDocuments))) {
148 // check if PDWAD-> PDF <-Document_Product_Equivalence.
149 Standard_Boolean iSexclude = Standard_False;
150 Handle(StepBasic_ProductDefinitionWithAssociatedDocuments) PDWAD =
151 Handle(StepBasic_ProductDefinitionWithAssociatedDocuments)::DownCast(ent);
152 Interface_EntityIterator PDWADsubs = WS()->Graph().Shareds(PDWAD);
153 for (PDWADsubs.Start(); PDWADsubs.More(); PDWADsubs.Next()) {
154 if ( !PDWADsubs.Value()->IsKind(STANDARD_TYPE(StepBasic_ProductDefinitionFormation)))
155 continue;
156 Handle(StepBasic_ProductDefinitionFormation) localPDF =
157 Handle(StepBasic_ProductDefinitionFormation)::DownCast(PDWADsubs.Value());
158 Interface_EntityIterator PDFsubs = WS()->Graph().Sharings(localPDF);
159 for( PDFsubs.Start(); PDFsubs.More(); PDFsubs.Next() )
160 if (PDFsubs.Value()->IsKind(STANDARD_TYPE(StepBasic_DocumentProductEquivalence))) {
161 iSexclude = Standard_True;
162 break;
163 }
164 if (iSexclude)
165 break;
166 }
167 if (iSexclude) {
0797d9d3 168#ifdef OCCT_DEBUG
7fd59977 169 cout << "Warning: STEPControl_Reader::NbRootsForTransfer exclude PDWAD from roots" << endl;
170#endif
171 continue;
172 }
173 }
174 Handle(StepBasic_ProductDefinition) PD =
175 Handle(StepBasic_ProductDefinition)::DownCast(ent);
176 Standard_Boolean IsRoot = Standard_True;
177 const Interface_Graph& graph = WS()->Graph();
178 // determinate roots used NextAssemblyUsageOccurrence
179 Interface_EntityIterator subs = graph.Sharings(PD);
180 for(subs.Start(); subs.More(); subs.Next()) {
181 Handle(StepRepr_NextAssemblyUsageOccurrence) NAUO =
182 Handle(StepRepr_NextAssemblyUsageOccurrence)::DownCast(subs.Value());
183 if (NAUO.IsNull()) continue;
184 if (PD==NAUO->RelatedProductDefinition()) IsRoot=Standard_False;
185 }
186 // determinate roots used ProductDefinitionContext
187 if(IsRoot) {
188 const char *str1 = Interface_Static::CVal("read.step.product.context");
189 Standard_Integer ICS = Interface_Static::IVal("read.step.product.context");
190 if(ICS>1) {
191 subs = graph.Shareds(PD);
192 for(subs.Start(); subs.More(); subs.Next()) {
193 Handle(StepBasic_ProductDefinitionContext) PDC =
194 Handle(StepBasic_ProductDefinitionContext)::DownCast(subs.Value());
195 if (PDC.IsNull()) continue;
196 const char *str2 = PDC->LifeCycleStage()->String().ToCString();
197 const char *str3 = PDC->Name()->String().ToCString();
198 if( !( strcasecmp(str1,str2)==0 || strcasecmp(str1,str3)==0 ) )
199 IsRoot=Standard_False;
200 }
201 }
202 }
203 // determinate roots used ProductDefinitionFormationRelationship
204 //subs = graph.Shareds(PD);
205 //for(subs.Start(); subs.More(); subs.Next()) {
206 // Handle(StepBasic_ProductDefinitionFormation) PDF =
207 // Handle(StepBasic_ProductDefinitionFormation)::DownCast(subs.Value());
208 // if (PDF.IsNull()) continue;
209 // Interface_EntityIterator subs1 = graph.Sharings(PDF);
210 // for(subs1.Start(); subs1.More(); subs1.Next()) {
211 // Handle(StepBasic_ProductDefinitionFormationRelationship) PDFR =
212 // Handle(StepBasic_ProductDefinitionFormationRelationship)::DownCast(subs1.Value());
213 // if (PDFR.IsNull()) continue;
214 // if (PDF==PDFR->RelatedProductDefinition()) IsRoot=Standard_False;
215 // }
216 //}
217 if (IsRoot) {
218 theroots.Append(ent);
7f56eba8 219 WS()->TransferReader()->TransientProcess()->RootsForTransfer()->Append(ent);
7fd59977 220 }
221 }
222 TCollection_AsciiString aProdMode = Interface_Static::CVal("read.step.product.mode");
223 if(!aProdMode.IsEqual("ON")) {
224 if(ent->IsKind(STANDARD_TYPE(StepShape_ShapeDefinitionRepresentation))) {
225 Standard_Boolean IsRoot = Standard_True;
226 Handle(StepShape_ShapeDefinitionRepresentation) SDR =
227 Handle(StepShape_ShapeDefinitionRepresentation)::DownCast(ent);
228 Handle(StepRepr_PropertyDefinition) PropDef = SDR->Definition().PropertyDefinition();
229 if(!PropDef.IsNull()) {
230 Handle(StepBasic_ProductDefinition) PD = PropDef->Definition().ProductDefinition();
231 if(!PD.IsNull()) IsRoot = Standard_False;
232 if(IsRoot) {
233 Handle(StepRepr_ShapeAspect) SA = PropDef->Definition().ShapeAspect();
234 if(!SA.IsNull()) {
235 Handle(StepRepr_ProductDefinitionShape) PDS = SA->OfShape();
236 PD = PDS->Definition().ProductDefinition();
237 if(!PD.IsNull()) IsRoot = Standard_False;
238 }
239 }
240 if(IsRoot) {
241 Handle(StepRepr_NextAssemblyUsageOccurrence) NAUO =
242 Handle(StepRepr_NextAssemblyUsageOccurrence)::DownCast(PropDef->Definition().ProductDefinitionRelationship());
243 if(!NAUO.IsNull()) IsRoot = Standard_False;
244 }
245 if(IsRoot) {
246 Handle(StepShape_ShapeRepresentation) SR =
247 Handle(StepShape_ShapeRepresentation)::DownCast(SDR->UsedRepresentation());
248 if(SR.IsNull()) IsRoot = Standard_False;
249 }
250 }
251 if(IsRoot) {
252 theroots.Append(ent);
7f56eba8 253 WS()->TransferReader()->TransientProcess()->RootsForTransfer()->Append(ent);
7fd59977 254 }
255 }
256 if(ent->IsKind(STANDARD_TYPE(StepShape_ShapeRepresentation))) {
257 Standard_Boolean IsRoot = Standard_True;
258 Handle(StepShape_ShapeRepresentation) SR =
259 Handle(StepShape_ShapeRepresentation)::DownCast(ent);
260 const Interface_Graph& graph = WS()->Graph();
261 Interface_EntityIterator subs = graph.Sharings(SR);
262 for(subs.Start(); subs.More() && IsRoot; subs.Next()) {
263 Handle(StepShape_ShapeDefinitionRepresentation) SDR =
264 Handle(StepShape_ShapeDefinitionRepresentation)::DownCast(subs.Value());
265 if(!SDR.IsNull()) IsRoot = Standard_False;
266 if(IsRoot) {
267 Handle(StepRepr_RepresentationRelationship) RR =
268 Handle(StepRepr_RepresentationRelationship)::DownCast(subs.Value());
269 if(!RR.IsNull()) {
270 Handle(StepShape_ShapeRepresentation) SR2 =
271 Handle(StepShape_ShapeRepresentation)::DownCast(RR->Rep1());
272 if(SR==SR2)
273 SR2 = Handle(StepShape_ShapeRepresentation)::DownCast(RR->Rep2());
274 Interface_EntityIterator subs2 = graph.Sharings(SR2);
275 for(subs2.Start(); subs2.More(); subs2.Next()) {
276 Handle(StepShape_ShapeDefinitionRepresentation) SDR2 =
277 Handle(StepShape_ShapeDefinitionRepresentation)::DownCast(subs2.Value());
278 if(!SDR2.IsNull()) IsRoot = Standard_False;
279 //else {
280 // if(SR==SRR->Rep2()) IsRoot = Standard_False;
281 //}
282 }
283 }
284 }
285 if(IsRoot) {
286 Handle(StepRepr_RepresentationMap) RM =
287 Handle(StepRepr_RepresentationMap)::DownCast(subs.Value());
288 if(!RM.IsNull()) {
289 Interface_EntityIterator subs2 = graph.Sharings(RM);
290 for(subs2.Start(); subs2.More(); subs2.Next()) {
291 Handle(StepRepr_MappedItem) MI = Handle(StepRepr_MappedItem)::DownCast(subs2.Value());
292 if(!MI.IsNull()) {
293 Interface_EntityIterator subs3 = graph.Sharings(MI);
294 for(subs3.Start(); subs3.More(); subs3.Next()) {
295 Handle(StepShape_ShapeRepresentation) SR2 =
296 Handle(StepShape_ShapeRepresentation)::DownCast(subs3.Value());
297 if(!SR2.IsNull()) IsRoot = Standard_False;
298 }
299 }
300 }
301 }
302 }
303 }
304 if(IsRoot) {
305 theroots.Append(ent);
7f56eba8 306 WS()->TransferReader()->TransientProcess()->RootsForTransfer()->Append(ent);
7fd59977 307 }
308 }
309 }
310
311 }
312
313
314 return theroots.Length();
315}
316
d402d481 317//=======================================================================
318//function : FileUnits
319//purpose :
320//=======================================================================
321
322void STEPControl_Reader::FileUnits( TColStd_SequenceOfAsciiString& theUnitLengthNames,
323 TColStd_SequenceOfAsciiString& theUnitAngleNames,
324 TColStd_SequenceOfAsciiString& theUnitSolidAngleNames)
325{
326 Standard_Integer nbroots = NbRootsForTransfer();
327 if(!nbroots)
328 return;
329 enum
330 {
331 LENGTH = 0,
332 ANLGE = 1,
333 SOLID_ANGLE = 2
334 };
335 const Interface_Graph& graph = WS()->Graph();
336 TColStd_MapOfAsciiString aMapUnits[3];
337
51740958 338 for(Standard_Integer i = 1; i <= nbroots; i++)
d402d481 339 {
340 Handle(Standard_Transient) anEnt = theroots(i);
341 Standard_Integer num = graph.EntityNumber(anEnt);
342 if(!num )
343 continue;
344 Handle(StepBasic_ProductDefinition) aProdDef =
345 Handle(StepBasic_ProductDefinition)::DownCast(anEnt);
346 Handle(StepShape_ShapeDefinitionRepresentation) aShapeDefRepr;
347 if(!aProdDef.IsNull())
348 {
349 Interface_EntityIterator subsPD = graph.Sharings(aProdDef);
350 for(subsPD.Start(); subsPD.More() && aShapeDefRepr.IsNull(); subsPD.Next())
351 {
352 Handle(StepRepr_ProductDefinitionShape) aProdDefShape =
353 Handle(StepRepr_ProductDefinitionShape)::DownCast(subsPD.Value());
354 if(aProdDefShape.IsNull())
355 continue;
356 Interface_EntityIterator subsSR = graph.Sharings(aProdDefShape);
357 Handle(StepShape_ShapeRepresentation) SR;
358 for(subsSR.Start(); subsSR.More() && aShapeDefRepr.IsNull(); subsSR.Next())
359 {
360 Handle(StepShape_ShapeDefinitionRepresentation) aCurShapeDefRepr =
361 Handle(StepShape_ShapeDefinitionRepresentation)::DownCast(subsSR.Value());
362 if(aCurShapeDefRepr.IsNull())
363 continue;
364 Handle(StepRepr_Representation) aUseRepr = aCurShapeDefRepr->UsedRepresentation();
365 if(aUseRepr.IsNull())
366 continue;
367 Handle(StepShape_ShapeRepresentation) aShapeRepr =
368 Handle(StepShape_ShapeRepresentation)::DownCast(aUseRepr);
369 if(aShapeRepr.IsNull())
370 continue;
371 aShapeDefRepr = aCurShapeDefRepr;
372
373 }
374
375
376 }
377
378 }
379 else
380 aShapeDefRepr = Handle(StepShape_ShapeDefinitionRepresentation)::DownCast(anEnt);
381 if(!aShapeDefRepr.IsNull())
382 {
383 Handle(StepShape_ShapeRepresentation) aShapeRepr =
384 Handle(StepShape_ShapeRepresentation)::DownCast(aShapeDefRepr->UsedRepresentation());
385 Handle(StepRepr_RepresentationContext) aRepCont = aShapeRepr->ContextOfItems();
386 if (aRepCont.IsNull())
387 continue;
388 TColStd_Array1OfAsciiString aNameUnits(1,3);
389 TColStd_Array1OfReal aFactorUnits(1,3);
390 if(findUnits(aRepCont,aNameUnits,aFactorUnits))
391 {
392 Standard_Integer k = LENGTH;
393 for ( ; k <= SOLID_ANGLE ; k++)
394 {
395 if(!aMapUnits[k].Contains(aNameUnits(k+1)))
396 {
397 aMapUnits[k].Add(aNameUnits(k+1));
398 TColStd_SequenceOfAsciiString& anUnitSeq = (k == LENGTH ?
399 theUnitLengthNames : ( k == ANLGE ? theUnitAngleNames : theUnitSolidAngleNames ));
400 anUnitSeq.Append(aNameUnits(k+1));
401 }
402 }
403 }
404
405 }
406
407 }
408 //for case when units was not found through PDF or SDR
409 if(theUnitLengthNames.IsEmpty())
410 {
7f56eba8 411 const Handle(Interface_InterfaceModel) &aModel = WS()->Model();
d402d481 412 if(aModel.IsNull())
413 return;
51740958 414 Standard_Integer nb = aModel->NbEntities();
415 for(Standard_Integer i = 1; i <= nb; i++)
d402d481 416 {
417 Handle(Standard_Transient) anEnt = aModel->Value(i);
418 Handle(StepRepr_RepresentationContext) aRepCont = Handle(StepRepr_RepresentationContext)::DownCast(anEnt);
419 if (aRepCont.IsNull())
420 continue;
421 TColStd_Array1OfAsciiString aNameUnits(1,3);
422 TColStd_Array1OfReal aFactorUnits(1,3);
423 if(findUnits(aRepCont,aNameUnits,aFactorUnits))
424 {
425 Standard_Integer k = LENGTH;
426 for ( ; k <= SOLID_ANGLE ; k++)
427 {
428 if(!aMapUnits[k].Contains(aNameUnits(k+1)))
429 {
430 aMapUnits[k].Add(aNameUnits(k+1));
431 TColStd_SequenceOfAsciiString& anUnitSeq = (k == LENGTH ?
432 theUnitLengthNames : ( k == ANLGE ? theUnitAngleNames : theUnitSolidAngleNames ));
433 anUnitSeq.Append(aNameUnits(k+1));
434 }
435 }
436 }
437 }
438 }
439}
440
441//=======================================================================
442//function : getSiName
443//purpose :
444//=======================================================================
445
e9c15c4c 446inline static TCollection_AsciiString getSiName(const Handle(StepBasic_SiUnit)& theUnit)
d402d481 447{
448
449 TCollection_AsciiString aName;
e9c15c4c 450 if (theUnit->HasPrefix()) {
451 switch (theUnit->Prefix()) {
452 case StepBasic_spExa: aName += "exa"; break;
453 case StepBasic_spPeta: aName += "peta"; break;
454 case StepBasic_spTera: aName += "tera"; break;
455 case StepBasic_spGiga: aName += "giga"; break;
456 case StepBasic_spMega: aName += "mega"; break;
457 case StepBasic_spHecto: aName += "hecto"; break;
458 case StepBasic_spDeca: aName += "deca"; break;
459 case StepBasic_spDeci: aName += "deci"; break;
460
461 case StepBasic_spPico: aName += "pico"; break;
462 case StepBasic_spFemto: aName += "femto"; break;
463 case StepBasic_spAtto: aName += "atto"; break;
464
465 case StepBasic_spKilo : aName += "kilo"; break;
466 case StepBasic_spCenti :aName += "centi"; break;
467 case StepBasic_spMilli :aName += "milli"; break;
468 case StepBasic_spMicro :aName += "micro"; break;
469 case StepBasic_spNano :aName += "nano"; break;
470 default: break;
d402d481 471 };
e9c15c4c 472 }
d402d481 473
e9c15c4c 474 switch(theUnit->Name()) {
d402d481 475 case StepBasic_sunMetre : aName += "metre"; break;
476 case StepBasic_sunRadian : aName += "radian"; break;
477 case StepBasic_sunSteradian : aName += "steradian"; break;
478 default: break;
479 };
480 return aName;
481}
482
483//=======================================================================
484//function : findUnits
485//purpose :
486//=======================================================================
487
488Standard_Boolean STEPControl_Reader::findUnits(
489 const Handle(StepRepr_RepresentationContext)& theRepCont,
490 TColStd_Array1OfAsciiString& theNameUnits,
491 TColStd_Array1OfReal& theFactorUnits)
492{
493 Handle(StepRepr_GlobalUnitAssignedContext) aContext;
494 Handle(StepRepr_GlobalUncertaintyAssignedContext) aTol;
495
496 if (theRepCont->IsKind(STANDARD_TYPE(StepGeom_GeometricRepresentationContextAndGlobalUnitAssignedContext))) {
497 aContext = Handle(StepGeom_GeometricRepresentationContextAndGlobalUnitAssignedContext)::
498 DownCast(theRepCont)->GlobalUnitAssignedContext();
499 }
500
501
502 if (theRepCont->IsKind(STANDARD_TYPE(StepGeom_GeomRepContextAndGlobUnitAssCtxAndGlobUncertaintyAssCtx))) {
503 aContext = Handle(StepGeom_GeomRepContextAndGlobUnitAssCtxAndGlobUncertaintyAssCtx)::
504 DownCast(theRepCont)->GlobalUnitAssignedContext();
505
506 }
507 if(aContext.IsNull())
508 return Standard_False;
509 // Start Computation
510 Handle(StepBasic_HArray1OfNamedUnit) anUnits = aContext->Units();
511 Standard_Integer nbU = aContext->NbUnits();
512 Standard_Integer nbFind = 0;
513 for (Standard_Integer i = 1; i <= nbU; i++) {
514 Handle(StepBasic_NamedUnit) aNamedUnit = aContext->UnitsValue(i);
515 Handle(StepBasic_ConversionBasedUnit) aConvUnit =
516 Handle(StepBasic_ConversionBasedUnit)::DownCast(aNamedUnit);
517 Standard_Integer anInd = 0;
518 TCollection_AsciiString aName;
519 Standard_Real anUnitFact = 0;
520 if( !aConvUnit.IsNull() )
521 {
522 Handle(StepBasic_MeasureWithUnit) aMeasWithUnit =
523 aConvUnit->ConversionFactor();
524
525 if(aMeasWithUnit.IsNull())
526 continue;
527
528 if( aMeasWithUnit->IsKind(STANDARD_TYPE(StepBasic_LengthMeasureWithUnit)) )
529 anInd = 1;
530 else if( aMeasWithUnit->IsKind(STANDARD_TYPE(StepBasic_PlaneAngleMeasureWithUnit)) )
531 anInd = 2;
532 else if( aMeasWithUnit->IsKind(STANDARD_TYPE(StepBasic_SolidAngleMeasureWithUnit)) )
533 anInd = 3;
534 if(!anInd)
535 continue;
536 aName = aConvUnit->Name()->String();
537 anUnitFact = aMeasWithUnit->ValueComponent();
538 }
539 else
540 {
541 Handle(StepBasic_SiUnit) aSiUnit = Handle(StepBasic_SiUnit)::DownCast(aNamedUnit);
542 if( aSiUnit.IsNull())
543 continue;
544 if(aSiUnit->IsKind(STANDARD_TYPE(StepBasic_SiUnitAndLengthUnit)))
545 anInd =1;
546 else if(aSiUnit->IsKind(STANDARD_TYPE(StepBasic_SiUnitAndPlaneAngleUnit)))
547 anInd = 2;
548 else if(aSiUnit->IsKind(STANDARD_TYPE(StepBasic_SiUnitAndSolidAngleUnit)))
549 anInd = 3;
550 if( !anInd )
551 continue;
552 anUnitFact = (!aSiUnit->HasPrefix() ?
553 1. : STEPConstruct_UnitContext::ConvertSiPrefix(aSiUnit->Prefix()));
e9c15c4c 554 aName = getSiName(aSiUnit);
d402d481 555
556
557 }
558 if( !anInd )
559 continue;
560
561 theNameUnits.SetValue(anInd, aName);
562 theFactorUnits.SetValue(anInd, anUnitFact);
563 nbFind++;
564
565 }
dde68833 566
567 return nbFind != 0;
d402d481 568}