| 1 | // Created on: 2011-10-14 |
| 2 | // Created by: Roman KOZLOV |
| 3 | // Copyright (c) 2011-2014 OPEN CASCADE SAS |
| 4 | // |
| 5 | // This file is part of Open CASCADE Technology software library. |
| 6 | // |
| 7 | // This library is free software; you can redistribute it and/or modify it under |
| 8 | // the terms of the GNU Lesser General Public License version 2.1 as published |
| 9 | // by the Free Software Foundation, with special exception defined in the file |
| 10 | // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT |
| 11 | // distribution for complete text of the license and disclaimer of any warranty. |
| 12 | // |
| 13 | // Alternatively, this file may be used under the terms of Open CASCADE |
| 14 | // commercial license or contractual agreement. |
| 15 | |
| 16 | #include <Adaptor3d_HCurve.hxx> |
| 17 | #include <Adaptor3d_IsoCurve.hxx> |
| 18 | #include <Bnd_Box.hxx> |
| 19 | #include <BRep_Tool.hxx> |
| 20 | #include <BRepMesh_IncrementalMesh.hxx> |
| 21 | #include <BRepBndLib.hxx> |
| 22 | #include <BRepMesh_DiscretFactory.hxx> |
| 23 | #include <BRepMesh_DiscretRoot.hxx> |
| 24 | #include <BRepTools.hxx> |
| 25 | #include <Hatch_Hatcher.hxx> |
| 26 | #include <GCPnts_QuasiUniformDeflection.hxx> |
| 27 | #include <GCPnts_TangentialDeflection.hxx> |
| 28 | #include <Geom_BezierSurface.hxx> |
| 29 | #include <Geom_BSplineSurface.hxx> |
| 30 | #include <Geom2dAdaptor_Curve.hxx> |
| 31 | #include <GeomAdaptor_Curve.hxx> |
| 32 | #include <gp_Dir2d.hxx> |
| 33 | #include <gp_Pnt2d.hxx> |
| 34 | #include <IVtkOCC_ShapeMesher.hxx> |
| 35 | #include <NCollection_Array1.hxx> |
| 36 | #include <Poly_Polygon3D.hxx> |
| 37 | #include <Poly_PolygonOnTriangulation.hxx> |
| 38 | #include <Poly_Triangulation.hxx> |
| 39 | #include <Precision.hxx> |
| 40 | #include <Prs3d.hxx> |
| 41 | #include <Prs3d_Drawer.hxx> |
| 42 | #include <Quantity_Length.hxx> |
| 43 | #include <Standard_ErrorHandler.hxx> |
| 44 | #include <TColgp_SequenceOfPnt2d.hxx> |
| 45 | #include <TColStd_Array1OfReal.hxx> |
| 46 | #include <TopExp.hxx> |
| 47 | #include <TopExp_Explorer.hxx> |
| 48 | |
| 49 | // Handle implementation |
| 50 | |
| 51 | |
| 52 | //================================================================ |
| 53 | // Function : internalBuild |
| 54 | // Purpose : |
| 55 | //================================================================ |
| 56 | void IVtkOCC_ShapeMesher::internalBuild() |
| 57 | { |
| 58 | // TODO: do we need any protection here so as not to triangualte |
| 59 | // the shape twice??? This can be done e.g. by checking if |
| 60 | // triangulation exists for TopoDS_Shape.. |
| 61 | meshShape(); |
| 62 | |
| 63 | // Free vertices and free edges should always be shown. |
| 64 | // Shared edges are needed in WF representation only. |
| 65 | // TODO: how to filter free edges at visualization level???? |
| 66 | addFreeVertices(); |
| 67 | addEdges(); |
| 68 | |
| 69 | // Build wireframe points and cells (lines for isolines) |
| 70 | addWireFrameFaces(); |
| 71 | |
| 72 | // Build shaded representation (based on Poly_Triangulation) |
| 73 | addShadedFaces(); |
| 74 | } |
| 75 | |
| 76 | //================================================================ |
| 77 | // Function : GetShapeObj |
| 78 | // Purpose : |
| 79 | //================================================================ |
| 80 | const IVtkOCC_Shape::Handle IVtkOCC_ShapeMesher::GetShapeObj() const |
| 81 | { |
| 82 | return (IVtkOCC_Shape::Handle::DownCast(myShapeObj)); |
| 83 | } |
| 84 | |
| 85 | //================================================================ |
| 86 | // Function : GetDeflection |
| 87 | // Purpose : Returns absolute deflection used by this algorithm. |
| 88 | //================================================================ |
| 89 | Standard_Real IVtkOCC_ShapeMesher::GetDeflection() const |
| 90 | { |
| 91 | if (myDeflection < Precision::Confusion()) // if not yet initialized |
| 92 | { |
| 93 | Handle(Prs3d_Drawer) aDefDrawer = new Prs3d_Drawer(); |
| 94 | aDefDrawer->SetTypeOfDeflection (Aspect_TOD_RELATIVE); |
| 95 | aDefDrawer->SetDeviationCoefficient (GetDeviationCoeff()); |
| 96 | myDeflection = Prs3d::GetDeflection (GetShapeObj()->GetShape(), aDefDrawer); |
| 97 | } |
| 98 | |
| 99 | return myDeflection; |
| 100 | } |
| 101 | |
| 102 | //================================================================ |
| 103 | // Function : meshShape |
| 104 | // Purpose : |
| 105 | //================================================================ |
| 106 | void IVtkOCC_ShapeMesher::meshShape() |
| 107 | { |
| 108 | TopoDS_Shape anOcctShape = GetShapeObj()->GetShape(); |
| 109 | if (anOcctShape.IsNull()) |
| 110 | { |
| 111 | return; |
| 112 | } |
| 113 | |
| 114 | //Clean triangulation before compute incremental mesh |
| 115 | BRepTools::Clean (anOcctShape); |
| 116 | |
| 117 | //Compute triangulation |
| 118 | Standard_Real aDeflection = GetDeflection(); |
| 119 | if (aDeflection < Precision::Confusion()) |
| 120 | { |
| 121 | return; |
| 122 | } |
| 123 | |
| 124 | try |
| 125 | { |
| 126 | OCC_CATCH_SIGNALS |
| 127 | |
| 128 | Handle(BRepMesh_DiscretRoot) anAlgo; |
| 129 | anAlgo = BRepMesh_DiscretFactory::Get().Discret (anOcctShape, |
| 130 | aDeflection, |
| 131 | GetDeviationAngle()); |
| 132 | if (!anAlgo.IsNull()) |
| 133 | { |
| 134 | anAlgo->Perform(); |
| 135 | } |
| 136 | } |
| 137 | catch (Standard_Failure) |
| 138 | { } |
| 139 | } |
| 140 | |
| 141 | //================================================================ |
| 142 | // Function : addFreeVertices |
| 143 | // Purpose : |
| 144 | //================================================================ |
| 145 | void IVtkOCC_ShapeMesher::addFreeVertices() |
| 146 | { |
| 147 | TopTools_IndexedDataMapOfShapeListOfShape aVertexMap; |
| 148 | TopExp::MapShapesAndAncestors (GetShapeObj()->GetShape(), |
| 149 | TopAbs_VERTEX, |
| 150 | TopAbs_EDGE, |
| 151 | aVertexMap); |
| 152 | |
| 153 | Standard_Integer aVertNum = aVertexMap.Extent(); |
| 154 | IVtk_MeshType aType; |
| 155 | for (Standard_Integer anIt = 1; anIt <= aVertNum; anIt++) |
| 156 | { |
| 157 | if (aVertexMap.FindFromIndex(anIt).IsEmpty()) |
| 158 | { |
| 159 | aType = MT_FreeVertex; |
| 160 | } |
| 161 | else |
| 162 | { |
| 163 | aType = MT_SharedVertex; |
| 164 | } |
| 165 | TopoDS_Vertex aVertex = TopoDS::Vertex (aVertexMap.FindKey (anIt)); |
| 166 | addVertex (aVertex, GetShapeObj()->GetSubShapeId (aVertex), aType); |
| 167 | } |
| 168 | } |
| 169 | |
| 170 | //================================================================ |
| 171 | // Function : addEdges |
| 172 | // Purpose : |
| 173 | //================================================================ |
| 174 | void IVtkOCC_ShapeMesher::addEdges() |
| 175 | { |
| 176 | TopTools_IndexedDataMapOfShapeListOfShape anEdgesMap; |
| 177 | TopExp::MapShapesAndAncestors (GetShapeObj()->GetShape(), |
| 178 | TopAbs_EDGE, |
| 179 | TopAbs_FACE, |
| 180 | anEdgesMap); |
| 181 | |
| 182 | int aNbFaces; |
| 183 | IVtk_MeshType aType; |
| 184 | myEdgesTypes.Clear(); |
| 185 | |
| 186 | TopExp_Explorer anEdgeIter (GetShapeObj()->GetShape(), TopAbs_EDGE); |
| 187 | for (; anEdgeIter.More(); anEdgeIter.Next()) |
| 188 | { |
| 189 | TopoDS_Edge anOcctEdge = TopoDS::Edge (anEdgeIter.Current()); |
| 190 | aNbFaces = anEdgesMap.FindFromKey (anOcctEdge).Extent(); |
| 191 | if (aNbFaces == 0) |
| 192 | { |
| 193 | aType = MT_FreeEdge; |
| 194 | } |
| 195 | else if (aNbFaces == 1) |
| 196 | { |
| 197 | aType = MT_BoundaryEdge; |
| 198 | } |
| 199 | else |
| 200 | { |
| 201 | aType = MT_SharedEdge; |
| 202 | } |
| 203 | addEdge (anOcctEdge, GetShapeObj()->GetSubShapeId (anOcctEdge), aType); |
| 204 | myEdgesTypes.Bind (anOcctEdge, aType); |
| 205 | } |
| 206 | } |
| 207 | |
| 208 | //================================================================ |
| 209 | // Function : addWireFrameFaces |
| 210 | // Purpose : |
| 211 | //================================================================ |
| 212 | void IVtkOCC_ShapeMesher::addWireFrameFaces() |
| 213 | { |
| 214 | // Check the deflection value once for all faces |
| 215 | if (GetDeflection() < Precision::Confusion()) |
| 216 | { |
| 217 | return; |
| 218 | } |
| 219 | |
| 220 | TopExp_Explorer aFaceIter (GetShapeObj()->GetShape(), TopAbs_FACE); |
| 221 | for (; aFaceIter.More(); aFaceIter.Next()) |
| 222 | { |
| 223 | TopoDS_Face anOcctFace = TopoDS::Face (aFaceIter.Current()); |
| 224 | try |
| 225 | { |
| 226 | OCC_CATCH_SIGNALS |
| 227 | addWFFace (anOcctFace, |
| 228 | GetShapeObj()->GetSubShapeId (anOcctFace)); |
| 229 | } |
| 230 | catch (Standard_Failure) |
| 231 | { } |
| 232 | } |
| 233 | } |
| 234 | |
| 235 | //================================================================ |
| 236 | // Function : addShadedFaces |
| 237 | // Purpose : |
| 238 | //================================================================ |
| 239 | void IVtkOCC_ShapeMesher::addShadedFaces() |
| 240 | { |
| 241 | TopExp_Explorer aFaceIter (GetShapeObj()->GetShape(), TopAbs_FACE); |
| 242 | for (; aFaceIter.More(); aFaceIter.Next()) |
| 243 | { |
| 244 | TopoDS_Face anOcctFace = TopoDS::Face (aFaceIter.Current()); |
| 245 | addShadedFace (anOcctFace, |
| 246 | GetShapeObj()->GetSubShapeId (anOcctFace)); |
| 247 | } |
| 248 | } |
| 249 | |
| 250 | //================================================================ |
| 251 | // Function : addVertex |
| 252 | // Purpose : |
| 253 | //================================================================ |
| 254 | void IVtkOCC_ShapeMesher::addVertex (const TopoDS_Vertex& theVertex, |
| 255 | const IVtk_IdType theShapeId, |
| 256 | const IVtk_MeshType theMeshType) |
| 257 | { |
| 258 | if (theVertex.IsNull()) |
| 259 | { |
| 260 | return; |
| 261 | } |
| 262 | |
| 263 | gp_Pnt aPnt3d = BRep_Tool::Pnt (theVertex); |
| 264 | |
| 265 | IVtk_PointId anId = |
| 266 | myShapeData->InsertCoordinate (aPnt3d.X(), aPnt3d.Y(), aPnt3d.Z()); |
| 267 | myShapeData->InsertVertex (theShapeId, anId, theMeshType); |
| 268 | |
| 269 | } |
| 270 | |
| 271 | //================================================================ |
| 272 | // Function : processPolyline |
| 273 | // Purpose : |
| 274 | //================================================================ |
| 275 | void IVtkOCC_ShapeMesher::processPolyline (Standard_Integer theNbNodes, |
| 276 | const TColgp_Array1OfPnt& thePoints, |
| 277 | const TColStd_Array1OfInteger& thePointIds, |
| 278 | const IVtk_IdType theOcctId, |
| 279 | bool theNoTransform, |
| 280 | gp_Trsf theTransformation, |
| 281 | const IVtk_MeshType theMeshType) |
| 282 | { |
| 283 | if (theNbNodes < 2) |
| 284 | { |
| 285 | return; |
| 286 | } |
| 287 | |
| 288 | IVtk_PointIdList *aPolyPointIds = new IVtk_PointIdList(); |
| 289 | |
| 290 | IVtk_PointId anId; |
| 291 | for (Standard_Integer aJ = 0; aJ < theNbNodes; aJ++) |
| 292 | { |
| 293 | Standard_Integer aPntId = thePointIds (aJ + 1); |
| 294 | gp_Pnt point = thePoints (aPntId); |
| 295 | |
| 296 | if (!theNoTransform) |
| 297 | { |
| 298 | // Apply the transformation to points |
| 299 | point.Transform (theTransformation); |
| 300 | } |
| 301 | |
| 302 | anId = myShapeData->InsertCoordinate (point.X(), point.Y(), point.Z()); |
| 303 | aPolyPointIds->Append (anId); |
| 304 | } |
| 305 | |
| 306 | myShapeData->InsertLine (theOcctId, aPolyPointIds, theMeshType); |
| 307 | |
| 308 | delete aPolyPointIds; |
| 309 | } |
| 310 | |
| 311 | //================================================================ |
| 312 | // Function : addEdge |
| 313 | // Purpose : |
| 314 | //================================================================ |
| 315 | void IVtkOCC_ShapeMesher::addEdge (const TopoDS_Edge& theEdge, |
| 316 | const IVtk_IdType theShapeId, |
| 317 | const IVtk_MeshType theMeshType) |
| 318 | { |
| 319 | if (theEdge.IsNull() || BRep_Tool::Degenerated (theEdge)) |
| 320 | { |
| 321 | return; |
| 322 | } |
| 323 | |
| 324 | // Two discrete representations of an OCCT edge are possible: |
| 325 | // 1. Polygon on trinagulation - holds Ids of points |
| 326 | // contained in Poly_Triangulation object |
| 327 | Handle(Poly_PolygonOnTriangulation) aPolyOnTriangulation; |
| 328 | Handle(Poly_Triangulation) aTriangulation; |
| 329 | TopLoc_Location aLocation; |
| 330 | BRep_Tool::PolygonOnTriangulation (theEdge, |
| 331 | aPolyOnTriangulation, |
| 332 | aTriangulation, |
| 333 | aLocation, |
| 334 | 1); |
| 335 | |
| 336 | // 2. 3D polygon - holds 3D points |
| 337 | Handle(Poly_Polygon3D) aPoly3d; |
| 338 | if (aPolyOnTriangulation.IsNull()) |
| 339 | { |
| 340 | aPoly3d = BRep_Tool::Polygon3D (theEdge, aLocation); |
| 341 | } |
| 342 | |
| 343 | if (aPoly3d.IsNull() && aPolyOnTriangulation.IsNull()) |
| 344 | { |
| 345 | return; |
| 346 | } |
| 347 | |
| 348 | // Handle a non-identity transofmation applied to the edge |
| 349 | gp_Trsf anEdgeTransf; |
| 350 | bool noTransform = true; |
| 351 | if (!aLocation.IsIdentity()) |
| 352 | { |
| 353 | noTransform = false; |
| 354 | anEdgeTransf = aLocation.Transformation(); |
| 355 | } |
| 356 | |
| 357 | if (!aPoly3d.IsNull()) |
| 358 | { |
| 359 | Standard_Integer aNbNodes = aPoly3d->NbNodes(); |
| 360 | const TColgp_Array1OfPnt& aPoints = aPoly3d->Nodes(); |
| 361 | TColStd_Array1OfInteger aPointIds (1, aNbNodes); |
| 362 | |
| 363 | for (Standard_Integer anI = 1; anI <= aNbNodes; anI++) |
| 364 | { |
| 365 | aPointIds.SetValue (anI, anI); |
| 366 | } |
| 367 | |
| 368 | processPolyline (aNbNodes, |
| 369 | aPoints, |
| 370 | aPointIds, |
| 371 | theShapeId, |
| 372 | noTransform, |
| 373 | anEdgeTransf, |
| 374 | theMeshType); |
| 375 | } |
| 376 | else |
| 377 | { |
| 378 | Standard_Integer aNbNodes = aPolyOnTriangulation->NbNodes(); |
| 379 | const TColStd_Array1OfInteger& aPointIds = aPolyOnTriangulation->Nodes(); |
| 380 | const TColgp_Array1OfPnt& aPoints = aTriangulation->Nodes(); |
| 381 | |
| 382 | processPolyline (aNbNodes, |
| 383 | aPoints, |
| 384 | aPointIds, |
| 385 | theShapeId, |
| 386 | noTransform, |
| 387 | anEdgeTransf, |
| 388 | theMeshType); |
| 389 | } |
| 390 | } |
| 391 | |
| 392 | |
| 393 | //================================================================ |
| 394 | // Function : FindLimits |
| 395 | // Purpose : Static internal function, finds parametrical limits of the curve. |
| 396 | //! @param [in] theCurve 3D curve adaptor used to retrieve the curve geometry |
| 397 | //! @param [in] theLimit maximum allowed absolute parameter value |
| 398 | //! @param [out] theFirst minimum parameter value for the curve |
| 399 | //! @param [out] theLast maximum parameter value for the curve |
| 400 | //================================================================ |
| 401 | static void FindLimits (const Adaptor3d_Curve& theCurve, |
| 402 | const Standard_Real& theLimit, |
| 403 | Standard_Real& theFirst, |
| 404 | Standard_Real& theLast) |
| 405 | { |
| 406 | theFirst = Max(theCurve.FirstParameter(), theFirst); |
| 407 | theLast = Min(theCurve.LastParameter(), theLast); |
| 408 | Standard_Boolean isFirstInf = Precision::IsNegativeInfinite (theFirst); |
| 409 | Standard_Boolean isLastInf = Precision::IsPositiveInfinite (theLast); |
| 410 | |
| 411 | if (isFirstInf || isLastInf) |
| 412 | { |
| 413 | gp_Pnt aP1, aP2; |
| 414 | Standard_Real aDelta = 1; |
| 415 | if (isFirstInf && isLastInf) |
| 416 | { |
| 417 | do |
| 418 | { |
| 419 | aDelta *= 2; |
| 420 | theFirst = - aDelta; |
| 421 | theLast = aDelta; |
| 422 | theCurve.D0 (theFirst, aP1); |
| 423 | theCurve.D0 (theLast, aP2); |
| 424 | } while (aP1.Distance (aP2) < theLimit); |
| 425 | } |
| 426 | else if (isFirstInf) |
| 427 | { |
| 428 | theCurve.D0 (theLast, aP2); |
| 429 | do { |
| 430 | aDelta *= 2; |
| 431 | theFirst = theLast - aDelta; |
| 432 | theCurve.D0 (theFirst, aP1); |
| 433 | } while (aP1.Distance(aP2) < theLimit); |
| 434 | } |
| 435 | else if (isLastInf) |
| 436 | { |
| 437 | theCurve.D0 (theFirst, aP1); |
| 438 | do |
| 439 | { |
| 440 | aDelta *= 2; |
| 441 | theLast = theFirst + aDelta; |
| 442 | theCurve.D0 (theLast, aP2); |
| 443 | } while (aP1.Distance (aP2) < theLimit); |
| 444 | } |
| 445 | } |
| 446 | } |
| 447 | |
| 448 | //================================================================ |
| 449 | // Function : FindLimits |
| 450 | // Purpose :Static helper function, builds a discrete representation |
| 451 | //! (sequence of points) for the given curve. |
| 452 | //! |
| 453 | //! @param [in] theCurve 3D curve adaptor used to retrieve the curve geometry |
| 454 | //! @param [in] theDeflection absolute deflection value |
| 455 | //! @param [in] theAngle deviation angle value |
| 456 | //! @param [in] theU1 minimal curve parameter value |
| 457 | //! @param [in] theU2 maximal curve parameter value |
| 458 | //! @param [out] thePoints the container for generated polyline |
| 459 | //================================================================ |
| 460 | static void DrawCurve (Adaptor3d_Curve& theCurve, |
| 461 | const Quantity_Length theDeflection, |
| 462 | const Standard_Real theAngle, |
| 463 | const Standard_Real theU1, |
| 464 | const Standard_Real theU2, |
| 465 | IVtk_Polyline& thePoints) |
| 466 | { |
| 467 | switch (theCurve.GetType()) |
| 468 | { |
| 469 | case GeomAbs_Line: |
| 470 | { |
| 471 | gp_Pnt aPnt = theCurve.Value(theU1); |
| 472 | thePoints.Append (aPnt); |
| 473 | |
| 474 | aPnt = theCurve.Value(0.5 * (theU1 + theU2)); |
| 475 | thePoints.Append (aPnt); |
| 476 | |
| 477 | aPnt = theCurve.Value (theU2); |
| 478 | thePoints.Append(aPnt); |
| 479 | } |
| 480 | break; |
| 481 | default: |
| 482 | { |
| 483 | Standard_Integer aNbInter = theCurve.NbIntervals(GeomAbs_C1); |
| 484 | Standard_Integer anI, aJ; |
| 485 | TColStd_Array1OfReal aParams(1, aNbInter+1); |
| 486 | theCurve.Intervals(aParams, GeomAbs_C1); |
| 487 | Standard_Real anU1, anU2; |
| 488 | Standard_Integer NumberOfPoints; |
| 489 | |
| 490 | for (aJ = 1; aJ <= aNbInter; aJ++) |
| 491 | { |
| 492 | anU1 = aParams (aJ); anU2 = aParams (aJ + 1); |
| 493 | if (anU2 > anU1 && anU1 < anU2) |
| 494 | { |
| 495 | anU1 = Max(anU1, anU1); |
| 496 | anU2 = Min(anU2, anU2); |
| 497 | |
| 498 | GCPnts_TangentialDeflection anAlgo (theCurve, anU1, anU2, theAngle, theDeflection); |
| 499 | NumberOfPoints = anAlgo.NbPoints(); |
| 500 | |
| 501 | if (NumberOfPoints > 0) |
| 502 | { |
| 503 | for (anI = 1; anI < NumberOfPoints; anI++) |
| 504 | { |
| 505 | thePoints.Append(anAlgo.Value (anI)); |
| 506 | } |
| 507 | if (aJ == aNbInter) |
| 508 | { |
| 509 | thePoints.Append (anAlgo.Value (NumberOfPoints)); |
| 510 | } |
| 511 | } |
| 512 | } |
| 513 | } |
| 514 | } |
| 515 | } |
| 516 | } |
| 517 | |
| 518 | //================================================================ |
| 519 | // Function : buildIsoLines |
| 520 | // Purpose : |
| 521 | //================================================================ |
| 522 | void IVtkOCC_ShapeMesher::buildIsoLines (const Handle(BRepAdaptor_HSurface)& theFace, |
| 523 | const Standard_Boolean theIsDrawUIso, |
| 524 | const Standard_Boolean theIsDrawVIso, |
| 525 | const Standard_Integer theNBUiso, |
| 526 | const Standard_Integer theNBViso, |
| 527 | IVtk_PolylineList& thePolylines) |
| 528 | { |
| 529 | Standard_Real anUF, anUL, aVF, aVL; |
| 530 | anUF = theFace->FirstUParameter(); |
| 531 | anUL = theFace->LastUParameter(); |
| 532 | aVF = theFace->FirstVParameter(); |
| 533 | aVL = theFace->LastVParameter(); |
| 534 | |
| 535 | // Restrict maximal parameter value |
| 536 | // in OCCT it's 5e+5 by default |
| 537 | const Standard_Real aLimit = 5e+5; |
| 538 | |
| 539 | // compute bounds of the restriction |
| 540 | Standard_Real anUMin, anUMax, aVMin, aVMax; |
| 541 | Standard_Integer anI; |
| 542 | |
| 543 | anUMin = Max (anUF, -aLimit); |
| 544 | anUMax = Min (anUL, aLimit); |
| 545 | aVMin = Max (aVF, -aLimit); |
| 546 | aVMax = Min (aVL, aLimit); |
| 547 | |
| 548 | // update min max for the hatcher. |
| 549 | gp_Pnt2d aP1,aP2; |
| 550 | gp_Pnt aDummyPnt; |
| 551 | |
| 552 | Standard_Real aDdefle = Max (anUMax - anUMin, aVMax - aVMin) * GetDeviationCoeff(); |
| 553 | TColgp_SequenceOfPnt2d aTabPoints; |
| 554 | |
| 555 | anUMin = aVMin = 1.e100; |
| 556 | anUMax = aVMax = -1.e100; |
| 557 | |
| 558 | // Process the edges |
| 559 | TopExp_Explorer aToolRst; |
| 560 | TopoDS_Face aTopoFace (((BRepAdaptor_Surface*)&(theFace->Surface()))->Face()); |
| 561 | for (aToolRst.Init (aTopoFace, TopAbs_EDGE); aToolRst.More(); aToolRst.Next()) |
| 562 | { |
| 563 | TopAbs_Orientation anOrient = aToolRst.Current().Orientation(); |
| 564 | // Skip INTERNAL and EXTERNAL edges |
| 565 | if (anOrient == TopAbs_FORWARD || anOrient == TopAbs_REVERSED) |
| 566 | { |
| 567 | Standard_Real anU1, anU2; |
| 568 | const Handle(Geom2d_Curve)& aCurve = |
| 569 | BRep_Tool::CurveOnSurface (TopoDS::Edge (aToolRst.Current()), |
| 570 | aTopoFace, |
| 571 | anU1, anU2); |
| 572 | if (aCurve.IsNull()) |
| 573 | { |
| 574 | continue; |
| 575 | } |
| 576 | |
| 577 | Geom2dAdaptor_Curve aRCurve; |
| 578 | aRCurve.Load (aCurve, anU1, anU2); |
| 579 | if (aRCurve.GetType() != GeomAbs_Line) |
| 580 | { |
| 581 | GCPnts_QuasiUniformDeflection aUDP(aRCurve, aDdefle); |
| 582 | if (aUDP.IsDone()) |
| 583 | { |
| 584 | Standard_Integer NumberOfPoints = aUDP.NbPoints(); |
| 585 | if ( NumberOfPoints >= 2 ) |
| 586 | { |
| 587 | aDummyPnt = aUDP.Value (1); |
| 588 | aP2.SetCoord (aDummyPnt.X(), aDummyPnt.Y()); |
| 589 | anUMin = Min (aP2.X(), anUMin); |
| 590 | anUMax = Max (aP2.X(), anUMax); |
| 591 | aVMin = Min (aP2.Y(), aVMin); |
| 592 | aVMax = Max (aP2.Y(), aVMax); |
| 593 | for (anI = 2; anI <= NumberOfPoints; anI++) |
| 594 | { |
| 595 | aP1 = aP2; |
| 596 | aDummyPnt = aUDP.Value (anI); |
| 597 | aP2.SetCoord (aDummyPnt.X(), aDummyPnt.Y()); |
| 598 | anUMin = Min(aP2.X(), anUMin); |
| 599 | anUMax = Max(aP2.X(), anUMax); |
| 600 | aVMin = Min(aP2.Y(), aVMin); |
| 601 | aVMax = Max(aP2.Y(), aVMax); |
| 602 | |
| 603 | if(anOrient == TopAbs_FORWARD ) |
| 604 | { |
| 605 | //isobuild.Trim(P1,P2); |
| 606 | aTabPoints.Append (aP1); |
| 607 | aTabPoints.Append (aP2); |
| 608 | } |
| 609 | else |
| 610 | { |
| 611 | //isobuild.Trim(P2,P1); |
| 612 | aTabPoints.Append (aP2); |
| 613 | aTabPoints.Append (aP1); |
| 614 | } |
| 615 | } |
| 616 | } |
| 617 | } |
| 618 | else |
| 619 | { |
| 620 | cout << "Cannot evaluate curve on surface"<<endl; |
| 621 | } |
| 622 | } |
| 623 | else |
| 624 | { |
| 625 | anU1 = aRCurve.FirstParameter(); |
| 626 | anU2 = aRCurve.LastParameter(); |
| 627 | // MSV 17.08.06 OCC13144: U2 occured less than U1, to overcome it |
| 628 | // ensure that distance U2-U1 is not greater than aLimit*2, |
| 629 | // if greater then choose an origin and use aLimit to define |
| 630 | // U1 and U2 anew |
| 631 | Standard_Real aOrigin = 0.; |
| 632 | if (!Precision::IsNegativeInfinite(anU1) || !Precision::IsPositiveInfinite (anU2)) |
| 633 | { |
| 634 | if (Precision::IsNegativeInfinite (anU1)) |
| 635 | { |
| 636 | aOrigin = anU2 - aLimit; |
| 637 | } |
| 638 | else if (Precision::IsPositiveInfinite (anU2)) |
| 639 | { |
| 640 | aOrigin = anU1 + aLimit; |
| 641 | } |
| 642 | else |
| 643 | { |
| 644 | aOrigin = (anU1 + anU2) * 0.5; |
| 645 | } |
| 646 | } |
| 647 | |
| 648 | anU1 = Max (aOrigin - aLimit, anU1); |
| 649 | anU2 = Min (aOrigin + aLimit, anU2); |
| 650 | aP1 = aRCurve.Value (anU1); |
| 651 | aP2 = aRCurve.Value (anU2); |
| 652 | anUMin = Min(aP1.X(), anUMin); |
| 653 | anUMax = Max(aP1.X(), anUMax); |
| 654 | aVMin = Min(aP1.Y(), aVMin); |
| 655 | aVMax = Max(aP1.Y(), aVMax); |
| 656 | anUMin = Min(aP2.X(), anUMin); |
| 657 | anUMax = Max(aP2.X(), anUMax); |
| 658 | aVMin = Min(aP2.Y(), aVMin); |
| 659 | aVMax = Max(aP2.Y(), aVMax); |
| 660 | if(anOrient == TopAbs_FORWARD ) |
| 661 | { |
| 662 | // isobuild.Trim(P1,P2); |
| 663 | aTabPoints.Append (aP1); |
| 664 | aTabPoints.Append (aP2); |
| 665 | } |
| 666 | else |
| 667 | { |
| 668 | //isobuild.Trim(P2,P1); |
| 669 | aTabPoints.Append (aP2); |
| 670 | aTabPoints.Append (aP1); |
| 671 | } |
| 672 | } |
| 673 | } |
| 674 | } |
| 675 | |
| 676 | // load the isos |
| 677 | const Standard_Real anIntersectionTolerance = 1.e-5; |
| 678 | Hatch_Hatcher anIsoBuild (anIntersectionTolerance, Standard_True ); |
| 679 | |
| 680 | Standard_Boolean isUClosed = theFace->IsUClosed(); |
| 681 | Standard_Boolean isVClosed = theFace->IsVClosed(); |
| 682 | |
| 683 | if (!isUClosed) |
| 684 | { |
| 685 | anUMin = anUMin + (anUMax - anUMin) / 1000.0; |
| 686 | anUMax = anUMax - (anUMax - anUMin) /1000.0; |
| 687 | } |
| 688 | |
| 689 | if (!isVClosed) |
| 690 | { |
| 691 | aVMin = aVMin + (aVMax - aVMin) /1000.0; |
| 692 | aVMax = aVMax - (aVMax - aVMin) /1000.0; |
| 693 | } |
| 694 | |
| 695 | if (theIsDrawUIso) |
| 696 | { |
| 697 | if (theNBUiso > 0) |
| 698 | { |
| 699 | isUClosed = Standard_False; |
| 700 | Standard_Real aDu= isUClosed ? (anUMax - anUMin) / theNBUiso : (anUMax - anUMin) / (1 + theNBUiso); |
| 701 | for (anI = 1; anI <= theNBUiso; anI++) |
| 702 | { |
| 703 | anIsoBuild.AddXLine (anUMin + aDu*anI); |
| 704 | } |
| 705 | } |
| 706 | } |
| 707 | if (theIsDrawVIso) |
| 708 | { |
| 709 | if (theNBViso > 0) |
| 710 | { |
| 711 | isVClosed = Standard_False; |
| 712 | Standard_Real aDv= isVClosed ? (aVMax - aVMin) / theNBViso : (aVMax - aVMin) / (1 + theNBViso); |
| 713 | for (anI = 1; anI <= theNBViso; anI++) |
| 714 | { |
| 715 | anIsoBuild.AddYLine (aVMin + aDv*anI); |
| 716 | } |
| 717 | } |
| 718 | } |
| 719 | |
| 720 | Standard_Integer aLength = aTabPoints.Length(); |
| 721 | for (anI = 1; anI <= aLength; anI += 2) |
| 722 | { |
| 723 | anIsoBuild.Trim (aTabPoints (anI),aTabPoints (anI + 1)); |
| 724 | } |
| 725 | |
| 726 | // Create the polylines for isos |
| 727 | Adaptor3d_IsoCurve anIso; |
| 728 | anIso.Load(theFace); |
| 729 | Handle(Geom_Curve) aBCurve; |
| 730 | const BRepAdaptor_Surface& aBSurf = *(BRepAdaptor_Surface*)&(theFace->Surface()); |
| 731 | GeomAbs_SurfaceType aType = theFace->GetType(); |
| 732 | |
| 733 | Standard_Integer aNumberOfLines = anIsoBuild.NbLines(); |
| 734 | Handle(Geom_Surface) aGeomSurf; |
| 735 | if (aType == GeomAbs_BezierSurface) |
| 736 | { |
| 737 | aGeomSurf = aBSurf.Bezier(); |
| 738 | } |
| 739 | else if (aType == GeomAbs_BSplineSurface) |
| 740 | { |
| 741 | aGeomSurf = aBSurf.BSpline(); |
| 742 | } |
| 743 | |
| 744 | Standard_Real aDeflection = GetDeflection(); |
| 745 | Standard_Real anAngle = GetDeviationAngle(); |
| 746 | for (anI = 1; anI <= aNumberOfLines; anI++) |
| 747 | { |
| 748 | Standard_Integer aNumberOfIntervals = anIsoBuild.NbIntervals(anI); |
| 749 | Standard_Real aCoord = anIsoBuild.Coordinate(anI); |
| 750 | for (Standard_Integer aJ = 1; aJ <= aNumberOfIntervals; aJ++) |
| 751 | { |
| 752 | Standard_Real aB1 = anIsoBuild.Start (anI, aJ); |
| 753 | Standard_Real aB2 = anIsoBuild.End(anI, aJ); |
| 754 | |
| 755 | if (!aGeomSurf.IsNull()) |
| 756 | { |
| 757 | if (anIsoBuild.IsXLine (anI)) |
| 758 | { |
| 759 | aBCurve = aGeomSurf->UIso (aCoord); |
| 760 | } |
| 761 | else |
| 762 | { |
| 763 | aBCurve = aGeomSurf->VIso (aCoord); |
| 764 | } |
| 765 | |
| 766 | GeomAdaptor_Curve aGeomCurve (aBCurve); |
| 767 | FindLimits (aGeomCurve, aLimit, aB1, aB2); |
| 768 | if (aB2 - aB1 > Precision::Confusion()) |
| 769 | { |
| 770 | IVtk_Polyline aPoints; |
| 771 | DrawCurve (aGeomCurve, aDeflection, anAngle, aB1, aB2, aPoints); |
| 772 | thePolylines.Append (aPoints); |
| 773 | } |
| 774 | } |
| 775 | else |
| 776 | { |
| 777 | if (anIsoBuild.IsXLine (anI)) |
| 778 | { |
| 779 | anIso.Load (GeomAbs_IsoU, aCoord, aB1, aB2); |
| 780 | } |
| 781 | else |
| 782 | { |
| 783 | anIso.Load (GeomAbs_IsoV, aCoord, aB1, aB2); |
| 784 | } |
| 785 | FindLimits (anIso, aLimit, aB1, aB2); |
| 786 | if (aB2 - aB1>Precision::Confusion()) |
| 787 | { |
| 788 | IVtk_Polyline aPoints; |
| 789 | DrawCurve (anIso, aDeflection, anAngle, aB1, aB2, aPoints); |
| 790 | thePolylines.Append (aPoints); |
| 791 | } |
| 792 | } |
| 793 | } |
| 794 | } |
| 795 | } |
| 796 | |
| 797 | //================================================================ |
| 798 | // Function : addWFFace |
| 799 | // Purpose : |
| 800 | //================================================================ |
| 801 | void IVtkOCC_ShapeMesher::addWFFace (const TopoDS_Face& theFace, |
| 802 | const IVtk_IdType theShapeId) |
| 803 | { |
| 804 | if (theFace.IsNull()) |
| 805 | { |
| 806 | return; |
| 807 | } |
| 808 | |
| 809 | TopoDS_Face aFaceToMesh = theFace; |
| 810 | aFaceToMesh.Orientation (TopAbs_FORWARD); |
| 811 | |
| 812 | // The code that builds wireframe representation for a TopoDS_Face |
| 813 | // has been adapted from some OCCT 6.5.1 methods: |
| 814 | // - Prs3d_WFShape::Add() |
| 815 | // - StdPrs_WFDeflectionRestrictedFace::Add() |
| 816 | // - StdPrs_DeflectionCurve::Add() |
| 817 | |
| 818 | // Add face's edges here but with the face ID |
| 819 | TopExp_Explorer anEdgeIter (aFaceToMesh, TopAbs_EDGE ); |
| 820 | for (; anEdgeIter.More(); anEdgeIter.Next()) |
| 821 | { |
| 822 | TopoDS_Edge anOcctEdge = TopoDS::Edge (anEdgeIter.Current()); |
| 823 | addEdge (anOcctEdge, theShapeId, myEdgesTypes (anOcctEdge)); |
| 824 | } |
| 825 | |
| 826 | TopLoc_Location aLoc; |
| 827 | const Handle(Geom_Surface)& aGeomSurf = BRep_Tool::Surface (aFaceToMesh, aLoc); |
| 828 | if (aGeomSurf.IsNull()) |
| 829 | { |
| 830 | return; |
| 831 | } |
| 832 | |
| 833 | BRepAdaptor_Surface aSurf; |
| 834 | aSurf.Initialize (aFaceToMesh); |
| 835 | Handle(BRepAdaptor_HSurface) aSurfAdaptor = new BRepAdaptor_HSurface (aSurf); |
| 836 | |
| 837 | IVtk_PolylineList aPolylines; |
| 838 | gp_Trsf aDummyTrsf; |
| 839 | |
| 840 | // Building U isolines |
| 841 | // Introducing a local scope here to simplify variable naming |
| 842 | { |
| 843 | buildIsoLines (aSurfAdaptor, |
| 844 | myNbIsos[0], |
| 845 | Standard_False, |
| 846 | myNbIsos[0], |
| 847 | 0, |
| 848 | aPolylines); |
| 849 | |
| 850 | IVtk_PolylineList::Iterator anIt (aPolylines); |
| 851 | for (; anIt.More(); anIt.Next()) |
| 852 | { |
| 853 | const IVtk_Polyline& aPntSeq = anIt.Value(); |
| 854 | Standard_Integer aNbNodes = aPntSeq.Length(); |
| 855 | TColgp_Array1OfPnt aPoints (1, aNbNodes); |
| 856 | for (Standard_Integer aJ = 1; aJ <= aNbNodes; aJ++) |
| 857 | { |
| 858 | aPoints.SetValue (aJ, aPntSeq.Value(aJ)); |
| 859 | } |
| 860 | |
| 861 | TColStd_Array1OfInteger aPointIds (1, aNbNodes); |
| 862 | for (Standard_Integer anI = 1; anI <= aNbNodes; anI++) |
| 863 | { |
| 864 | aPointIds.SetValue (anI, anI); |
| 865 | } |
| 866 | |
| 867 | processPolyline (aNbNodes, |
| 868 | aPoints, |
| 869 | aPointIds, |
| 870 | theShapeId, |
| 871 | true, |
| 872 | aDummyTrsf, |
| 873 | MT_IsoLine); |
| 874 | } |
| 875 | } |
| 876 | |
| 877 | // Building V isolines |
| 878 | { |
| 879 | aPolylines.Clear(); |
| 880 | buildIsoLines (aSurfAdaptor, |
| 881 | Standard_False, |
| 882 | myNbIsos[1], |
| 883 | 0, |
| 884 | myNbIsos[1], |
| 885 | aPolylines); |
| 886 | |
| 887 | IVtk_PolylineList::Iterator anIt (aPolylines); |
| 888 | for (; anIt.More(); anIt.Next()) |
| 889 | { |
| 890 | const IVtk_Polyline& aPntSeq = anIt.Value(); |
| 891 | Standard_Integer aNbNodes = aPntSeq.Length(); |
| 892 | TColgp_Array1OfPnt aPoints (1, aNbNodes); |
| 893 | for (int aJ = 1; aJ <= aNbNodes; aJ++) |
| 894 | { |
| 895 | aPoints.SetValue (aJ, aPntSeq.Value (aJ)); |
| 896 | } |
| 897 | |
| 898 | TColStd_Array1OfInteger aPointIds (1, aNbNodes); |
| 899 | for (Standard_Integer anI = 1; anI <= aNbNodes; anI++) |
| 900 | { |
| 901 | aPointIds.SetValue (anI, anI); |
| 902 | } |
| 903 | |
| 904 | processPolyline (aNbNodes, |
| 905 | aPoints, |
| 906 | aPointIds, |
| 907 | theShapeId, |
| 908 | true, |
| 909 | aDummyTrsf, |
| 910 | MT_IsoLine); |
| 911 | } |
| 912 | } |
| 913 | } |
| 914 | |
| 915 | //================================================================ |
| 916 | // Function : addShadedFace |
| 917 | // Purpose : |
| 918 | //================================================================ |
| 919 | void IVtkOCC_ShapeMesher::addShadedFace (const TopoDS_Face& theFace, |
| 920 | const IVtk_IdType theShapeId) |
| 921 | { |
| 922 | if (theFace.IsNull()) |
| 923 | { |
| 924 | return; |
| 925 | } |
| 926 | |
| 927 | // Build triangulation of the face. |
| 928 | TopLoc_Location aLoc; |
| 929 | Handle(Poly_Triangulation) anOcctTriangulation = BRep_Tool::Triangulation (theFace, aLoc); |
| 930 | if (anOcctTriangulation.IsNull()) |
| 931 | { |
| 932 | return; |
| 933 | } |
| 934 | |
| 935 | gp_Trsf aPntTransform; |
| 936 | Standard_Boolean noTransform = Standard_True; |
| 937 | if (!aLoc.IsIdentity()) |
| 938 | { |
| 939 | noTransform = Standard_False; |
| 940 | aPntTransform = aLoc.Transformation(); |
| 941 | } |
| 942 | |
| 943 | // Get triangulation points. |
| 944 | const TColgp_Array1OfPnt& aPoints = anOcctTriangulation->Nodes(); |
| 945 | Standard_Integer aNbPoints = anOcctTriangulation->NbNodes(); |
| 946 | |
| 947 | // Keep inserted points id's of triangulation in an array. |
| 948 | NCollection_Array1<IVtk_PointId> aPointIds (1, aNbPoints); |
| 949 | IVtk_PointId anId; |
| 950 | |
| 951 | Standard_Integer anI; |
| 952 | for (anI = 1; anI <= aNbPoints; anI++) |
| 953 | { |
| 954 | gp_Pnt aPoint = aPoints (anI); |
| 955 | |
| 956 | if (!noTransform) |
| 957 | { |
| 958 | aPoint.Transform (aPntTransform); |
| 959 | } |
| 960 | |
| 961 | // Add a point into output shape data and keep its id in the array. |
| 962 | anId = myShapeData->InsertCoordinate (aPoint.X(), aPoint.Y(), aPoint.Z()); |
| 963 | aPointIds.SetValue (anI, anId); |
| 964 | } |
| 965 | |
| 966 | // Create triangles on the created triangulation points. |
| 967 | const Poly_Array1OfTriangle& aTriangles = anOcctTriangulation->Triangles(); |
| 968 | Standard_Integer aNbTriangles = anOcctTriangulation->NbTriangles(); |
| 969 | Standard_Integer aN1, aN2, aN3; |
| 970 | for (anI = 1; anI <= aNbTriangles; anI++) |
| 971 | { |
| 972 | aTriangles(anI).Get (aN1, aN2, aN3); // get indexes of triangle's points |
| 973 | // Insert new triangle on these points into output shape data. |
| 974 | myShapeData->InsertTriangle ( |
| 975 | theShapeId, aPointIds(aN1), aPointIds(aN2), aPointIds(aN3), MT_ShadedFace); |
| 976 | } |
| 977 | } |