bbtk_creaVtk_PKG/src/bbcreaVtkCreateMeshFromPoints.cxx

   1 //=====
   2 // Before editing this file, make sure it's a file of your own (i.e.: it wasn't generated from xml description; if so : your modifications will be lost)
   3 //=====
   4 #include "bbcreaVtkCreateMeshFromPoints.h"
   5 #include "bbcreaVtkPackage.h"
   6
   7 #include "vtkTriangleStrip.h"
   8 #include <vtkMath.h>
   9
  10 namespace bbcreaVtk
  11 {
  12
  13 BBTK_ADD_BLACK_BOX_TO_PACKAGE(creaVtk,CreateMeshFromPoints)
  14 BBTK_BLACK_BOX_IMPLEMENTATION(CreateMeshFromPoints,bbtk::AtomicBlackBox);
  15 //=====
  16 // Before editing this file, make sure it's a file of your own (i.e.: it wasn't generated from xml description; if so : your modifications will be lost)
  17 //=====
  18 void CreateMeshFromPoints::Process()
  19 {
  20
  21 // THE MAIN PROCESSING METHOD BODY
  22 //   Here we simply set the input 'In' value to the output 'Out'
  23 //   And print out the output value
  24 // INPUT/OUTPUT ACCESSORS ARE OF THE FORM :
  25 //    void bbSet{Input|Output}NAME(const TYPE&)
  26 //    const TYPE& bbGet{Input|Output}NAME() const
  27 //    Where :
  28 //    * NAME is the name of the input/output
  29 //      (the one provided in the attribute 'name' of the tag 'input')
  30 //    * TYPE is the C++ type of the input/output
  31 //      (the one provided in the attribute 'type' of the tag 'input')
  32
  33 //    bbSetOutputOut( bbGetInputIn() );
  34 //    std::cout << "Output value = " <<bbGetOutputOut() << std::endl;
  35
  36                 std::vector<double> lstX                = bbGetInputLstX();
  37                 std::vector<double> lstY                = bbGetInputLstY();
  38                 std::vector<double> lstZ                = bbGetInputLstZ();
  39                 std::vector<int> lstIndexs              = bbGetInputLstIndexs();
  40                 if ( (lstIndexs.size()<=1) || (lstX.size()==0) || (lstX.size()!=lstY.size()) || (lstY.size()!=lstZ.size()) )
  41                 {
  42                         printf("Warning! CreateMeshFromPoints::Process: List of points X Y Z  and LstIndexes is not correct\n");
  43                         bbSetOutputOut(NULL);
  44                 } else  {
  45                         int ii,sizeSegment1,sizeSegment2;
  46                         int endSegment;
  47 //                      vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New();
  48                         if (points!=NULL) points->Delete();
  49                         points = vtkPoints::New();
  50                         int i,sizeLstX  =       lstX.size();
  51                         for (i=0;i<sizeLstX;i++)
  52                         {
  53                                 points->InsertNextPoint(lstX[i],lstY[i],lstZ[i]);
  54                         } // for i
  55 //                      vtkSmartPointer<vtkCellArray> cells = vtkSmartPointer<vtkCellArray>::New();
  56                         if (cells!=NULL) cells->Delete();
  57                         cells = vtkCellArray::New();
  58                         int maxElements;
  59                         int maxSegment1,maxSegment2;
  60                         int iSeg1,iSeg2;
  61                         int iGeneral    =       0;
  62                         int     sizeLstIdexes=lstIndexs.size();
  63                         for (i=0; i<sizeLstIdexes-1; i++ )
  64                         {
  65                                 sizeSegment1 = lstIndexs[i];
  66                                 sizeSegment2 = lstIndexs[i+1];
  67                                 vtkSmartPointer<vtkTriangleStrip> triangleStrip = vtkSmartPointer<vtkTriangleStrip>::New();
  68                                 triangleStrip->GetPointIds()->SetNumberOfIds(sizeSegment1+sizeSegment2);
  69                                 maxElements=sizeSegment1;
  70                                 if (maxElements<sizeSegment2) maxElements=sizeSegment2;
  71                                 maxSegment1     = iGeneral+sizeSegment1;
  72                                 maxSegment2     = iGeneral+sizeSegment1+sizeSegment2;
  73                                 iSeg1           = iGeneral;
  74                                 iSeg2           = iGeneral+sizeSegment1;
  75                                 for (ii=0; ii<maxElements; ii++)
  76                                 {
  77                                         triangleStrip->GetPointIds()->SetId(ii*2  ,iSeg1);
  78                                         triangleStrip->GetPointIds()->SetId(ii*2+1,iSeg2);
  79                                         iSeg1++;
  80                                         iSeg2++;
  81                     if (iSeg1>=maxSegment1) { iSeg1=maxSegment1-1; }
  82                     if (iSeg2>=maxSegment2) { iSeg2=maxSegment2-1; }
  83                                 } // for ii
  84                                 iGeneral=iGeneral+sizeSegment1;
  85                                 cells->InsertNextCell(triangleStrip);
  86                         } //for  LstIndexs
  87
  88                         int lastId1 = lstIndexs[0]-1;
  89                         int lastId2 = sizeLstX - 1;
  90                         int firstId2 = sizeLstX - lstIndexs[sizeLstIdexes - 1];
  91                         bool face1open = lstX[0] != lstX[lastId1] && lstY[0] != lstY[lastId1] && lstZ[0] != lstZ[lastId1];
  92                         bool face2open = lstX[firstId2] != lstX[lastId2] && lstY[firstId2] != lstY[lastId2] && lstZ[firstId2] != lstZ[lastId2];
  93
  94                         bool altFace1open = lstX[0] != lstX[firstId2] && lstY[0] != lstY[firstId2] && lstZ[0] != lstZ[firstId2];
  95                         bool altFace2open = lstX[lastId1] != lstX[lastId2] && lstY[lastId1] != lstY[lastId2] && lstZ[lastId1] != lstZ[lastId2];
  96
  97                         //bool closedLineOrd = !altFace1open && !altFace2open;
  98
  99                         //isClosedCont = !face1open && !face2open;
 100                         isClosedCont = false;
 101                         if(bbGetInputCloseSurface())
 102                         {
 103                                 //false = Open Contour
 104                                 //true = Closed Contour
 105                                 if(!face1open && !face2open)
 106                                 {
 107                                         isClosedCont = true;
 108                                         CloseContourSides(lstIndexs, true);
 109                                 }
 110                                 else if(!altFace1open && !altFace2open)
 111                                 {
 112                                         isClosedCont = true;
 113                                         CloseContourSides(lstIndexs, false);
 114                                 }
 115                                 else{
 116                                         CloseOpenContourSurface(lstIndexs);
 117                                 }
 118                         }
 119
 120 //                      vtkPolyData *polydata = vtkPolyData::New();
 121                         if (polydata!=NULL) polydata->Delete();
 122                         polydata = vtkPolyData::New();
 123                         polydata->SetPoints(points);
 124                         polydata->SetStrips(cells);
 125 //                      vtkCleanPolyData *clean=vtkCleanPolyData::New();
 126                         if (clean!=NULL) clean->Delete();
 127                         clean = vtkCleanPolyData::New();
 128                         clean->SetInputData(polydata);
 129                         clean->Update();
 130 //                      vtkTriangleFilter *triangle = vtkTriangleFilter::New();
 131                         if (triangle!=NULL) triangle->Delete();
 132                         triangle = vtkTriangleFilter::New();
 133                         triangle->SetInputData( clean->GetOutput() );
 134                         triangle->Update();
 135             bbSetOutputOut( triangle->GetOutput() );
 136             //            bbSetOutputOut( clean->GetOutput() );
 137                 }// if listXYZ size
 138                 //printf("PG CreateMeshFromPoints::Process: End\n");
 139 }
 140
 141 /**
 142 * Closes the sides of the contour
 143 * iterates in one way or the other, depending on the order of the points and calculated vectors.
 144 * uPointOrder: Points are order in a U shape
 145 * lstIndexs: number of points on each spline
 146 */
 147 void CreateMeshFromPoints::CloseContourSides(std::vector<int> lstIndexs, bool uPointOrder){
 148         int     sizeLstIdexes = lstIndexs.size();
 149         int sizePoints = bbGetInputLstX().size();
 150
 151         int firstIndex, end, centroidId, numPointsFace, contraryId;
 152         int increment = uPointOrder?1:sizeLstIdexes;
 153         double centroid[3];
 154
 155         for(int facesIdx = 0; facesIdx < 2; facesIdx++){
 156                 std::fill(std::begin(centroid), std::end(centroid), 0);
 157                 if(facesIdx == 0)
 158                 {
 159                         firstIndex = 0;
 160                         numPointsFace = uPointOrder?lstIndexs[0]: sizeLstIdexes;
 161                         end = uPointOrder?firstIndex + numPointsFace:sizePoints - lstIndexs[sizeLstIdexes - 1] + 1;
 162                         contraryId = sizePoints-1;
 163                 }else{
 164                         firstIndex = uPointOrder?sizePoints - lstIndexs[sizeLstIdexes-1]:lstIndexs[0]-1;
 165                         numPointsFace = uPointOrder?lstIndexs[sizeLstIdexes-1]:sizeLstIdexes;
 166                         end = uPointOrder?firstIndex + numPointsFace:sizePoints;
 167                         contraryId = 0;
 168                 }
 169                 if(numPointsFace > 1)
 170                 {
 171                         bool validCentroid = CalcValidCentroid(centroid, firstIndex, end, increment, numPointsFace);
 172                         if(validCentroid)
 173                         {
 174                                 bool normalOrder    = isPointingCorrectly(firstIndex, firstIndex+increment, centroid, contraryId);
 175                                 centroidId          = points->InsertNextPoint(centroid[0], centroid[1], centroid[2]);
 176                                 vtkSmartPointer<vtkTriangleStrip> triangleStrip1 = vtkSmartPointer<vtkTriangleStrip>::New();
 177                                 triangleStrip1->GetPointIds()->SetNumberOfIds(numPointsFace*2 + (!isClosedCont?2:0));
 178                                 if( normalOrder )
 179                 {
 180                                         int initial = firstIndex;
 181                                         int triangleIndex = 0;
 182                                         for(int index = initial; index < end; index+=increment){
 183                                                 triangleStrip1->GetPointIds()->SetId(triangleIndex,index);
 184                                                 triangleStrip1->GetPointIds()->SetId(triangleIndex+1,centroidId);//1
 185                                                 if(index+increment >= end && !isClosedCont){
 186                                                         triangleStrip1->GetPointIds()->SetId(triangleIndex+2,initial);//2
 187                                                         triangleStrip1->GetPointIds()->SetId(triangleIndex+3,centroidId);//3
 188                                                 }
 189                                                 //else{
 190                                                 //}
 191                                                 triangleIndex+=2;
 192                                         }
 193                                         cells->InsertNextCell(triangleStrip1);
 194                                 } else {
 195                                         int initial = firstIndex-1;
 196                                         int triangleIndex = 0;
 197                                         int triangleStripStart = end-1;
 198                                         for(int index = triangleStripStart; index > initial; index-=increment){
 199                                                 triangleStrip1->GetPointIds()->SetId(triangleIndex,index);
 200                                                 triangleStrip1->GetPointIds()->SetId(triangleIndex+1,centroidId);
 201                                                 if(index-increment <= initial && !isClosedCont){
 202                                                         triangleStrip1->GetPointIds()->SetId(triangleIndex+2,triangleStripStart);
 203                                                         triangleStrip1->GetPointIds()->SetId(triangleIndex+3,centroidId);
 204                                                 }
 205                                                 //else{
 206                                                 //}
 207                                                 triangleIndex+=2;
 208                                         }
 209                                         cells->InsertNextCell(triangleStrip1);
 210                                 }
 211                         }//if validCentroid
 212                 }//if numPointsFace
 213         }//for facesIdx
 214
 215 }
 216
 217 /**
 218 * Checks if the normal from firstPointId, secPointId and centroid points away
 219 * from the vector centroid to contrPointId.
 220 * Used to check that the order used to create the new polygons is correct.
 221 */
 222 bool CreateMeshFromPoints::isPointingCorrectly( int firstPointId, int secPointId, double(&centroid)[3], int contrPointId) {
 223
 224         double firstPoint[3], secPoint[3], contrPoint[3];
 225         points->GetPoint(firstPointId, firstPoint);
 226         points->GetPoint(secPointId, secPoint);
 227
 228         double firstVect[3], secVect[3], normal[3], contrVect[3];
 229
 230         vtkMath::Subtract(firstPoint, centroid, firstVect);
 231         vtkMath::Subtract(secPoint, centroid, secVect);
 232
 233         points->GetPoint(contrPointId, contrPoint);
 234         vtkMath::Subtract(contrPoint, centroid, contrVect);
 235
 236         vtkMath::Cross(firstVect, secVect, normal);
 237         double dotCalc;
 238         dotCalc = vtkMath::Dot(normal, contrVect);
 239
 240         return dotCalc<0;
 241 }
 242
 243 /**
 244 * Checks if points on each side of the shapes represent a curve.
 245 */
 246 bool CreateMeshFromPoints::CheckLinePointOrder(){
 247         int sizePoints = bbGetInputLstX().size();
 248         std::vector<int> lstIndexs = bbGetInputLstIndexs();
 249         double point1[3], point2[3], point3[3];
 250         double center[3];
 251         double firstRadiusSum = 0;
 252         double secondRadiusSum = 0;
 253         for(int i = 0; i < lstIndexs[0] && lstIndexs[0] > 9; i+=5){
 254                 if(i+10 < lstIndexs[0]){
 255                         points->GetPoint(i, point1);
 256                         points->GetPoint(i+5, point2);
 257                         points->GetPoint(i+10, point3);
 258                         firstRadiusSum += vtkMath::Solve3PointCircle(point1, point2, point3, center);
 259                 }
 260         }
 261
 262         for(int i = 0; i < sizePoints && lstIndexs.size() > 9; i+=(lstIndexs.size()*5)){
 263                 if(i+(10*lstIndexs.size()) < sizePoints){
 264                         points->GetPoint(i, point1);
 265                         points->GetPoint(i+(5*lstIndexs.size()), point2);
 266                         points->GetPoint(i+(10*lstIndexs.size()), point3);
 267                         secondRadiusSum += vtkMath::Solve3PointCircle(point1, point2, point3, center);
 268                 }
 269         }
 270
 271         return firstRadiusSum > secondRadiusSum;
 272 }
 273
 274 /**
 275 * Closes an open contour
 276 * lstIndexs: number of points on each spline
 277 */
 278 void CreateMeshFromPoints::CloseOpenContourSurface(std::vector<int> lstIndexs){
 279         bool linePointOrder = CheckLinePointOrder();
 280         CloseContourSides(lstIndexs, !linePointOrder);
 281         CloseContourBottom(!linePointOrder);
 282 }
 283
 284 /**
 285 * Calculates centroid and checks if points are collinear.
 286 * centroid: array to store calculation
 287 * start: start index of points to use
 288 * end: end index of points to use
 289 * increment: increment to be used in point iteration
 290 * numPoints: number of points used to calculate the centroid.
 291 * Returns a bool indicating the validity of the centroid calculated.
 292 * False = invalid centroid = all points are the same.
 293 */
 294 bool CreateMeshFromPoints::CalcValidCentroid(double(&centroid)[3], int start, int end, int increment, int numPoints){
 295         double currPoint[3] = {}, prevPoint[3] = {}, middlePoint[3] = {}, firstPoint[3] = {};
 296         double vector1[3], vector2[3];
 297         bool samePoint = true;
 298         int splineMidPoint = numPoints/2;
 299         bool collinear = true;
 300
 301         points->GetPoint(start, firstPoint);
 302         points->GetPoint(splineMidPoint, middlePoint);
 303         vtkMath::Subtract(middlePoint, firstPoint, vector1);
 304
 305         for(int i = start; i < end; i+=increment){
 306                 points->GetPoint(i, currPoint);
 307                 if(samePoint && i > start && (currPoint[0] != prevPoint[0] || currPoint[1] != prevPoint[1] || currPoint[2] != prevPoint[2])){
 308                         samePoint = false;
 309                 }
 310
 311                 vtkMath::Subtract(currPoint, firstPoint, vector2);
 312                 double angle = vtkMath::AngleBetweenVectors(vector1, vector2);
 313                 if(angle > 0.0001 && collinear){
 314                         collinear = false;
 315                 }
 316
 317                 centroid[0] += currPoint[0];
 318                 centroid[1] += currPoint[1];
 319                 centroid[2] += currPoint[2];
 320                 std::copy(std::begin(currPoint), std::end(currPoint), prevPoint);
 321         }
 322
 323         centroid[0] /= numPoints;
 324         centroid[1] /= numPoints;
 325         centroid[2] /= numPoints;
 326
 327         return !samePoint && !collinear;
 328 }
 329
 330 /**
 331 * Closes the bottom of the given countour.
 332 * Should only be used when its an open contour.
 333 * uPointOrder: points are ordered in U shape
 334 */
 335 void CreateMeshFromPoints::CloseContourBottom(bool uPointOrder){
 336         std::vector<int> lstIndexs = bbGetInputLstIndexs();
 337         int sizeLstIdexes = lstIndexs.size();
 338         int sizeLstX = bbGetInputLstX().size();
 339
 340         vtkSmartPointer<vtkTriangleStrip> triangleStripBottom = vtkSmartPointer<vtkTriangleStrip>::New();
 341         triangleStripBottom->GetPointIds()->SetNumberOfIds(sizeLstIdexes*2);
 342         int triangleIndex = 0, currentId = 0, nextId = 0;
 343         for(int splineIndex = 0; splineIndex < sizeLstIdexes;splineIndex++){
 344                 triangleStripBottom->GetPointIds()->SetId(triangleIndex, currentId);
 345                 nextId = uPointOrder?currentId + lstIndexs[splineIndex] - 1:sizeLstX - sizeLstIdexes + splineIndex;
 346                 triangleStripBottom->GetPointIds()->SetId(triangleIndex+1, nextId);
 347                 triangleIndex+=2;
 348                 currentId = uPointOrder?nextId + 1: splineIndex+1;
 349         }
 350         cells->InsertNextCell(triangleStripBottom);
 351 }
 352
 353 //=====
 354 // Before editing this file, make sure it's a file of your own (i.e.: it wasn't generated from xml description; if so : your modifications will be lost)
 355 //=====
 356 void CreateMeshFromPoints::bbUserSetDefaultValues()
 357 {
 358
 359 //  SET HERE THE DEFAULT INPUT/OUTPUT VALUES OF YOUR BOX
 360 //    Here we initialize the input 'In' to 0
 361 //   bbSetInputIn(0);
 362         bbSetInputCloseSurface(false);
 363         isClosedCont = NULL;
 364         points          = NULL;
 365         cells           = NULL;
 366         polydata        = NULL;
 367         clean           = NULL;
 368         triangle        = NULL;
 369 }
 370 //=====
 371 // Before editing this file, make sure it's a file of your own (i.e.: it wasn't generated from xml description; if so : your modifications will be lost)
 372 //=====
 373 void CreateMeshFromPoints::bbUserInitializeProcessing()
 374 {
 375
 376 //  THE INITIALIZATION METHOD BODY :
 377 //    Here does nothing
 378 //    but this is where you should allocate the internal/output pointers
 379 //    if any
 380
 381
 382 }
 383 //=====
 384 // Before editing this file, make sure it's a file of your own (i.e.: it wasn't generated from xml description; if so : your modifications will be lost)
 385 //=====
 386 void CreateMeshFromPoints::bbUserFinalizeProcessing()
 387 {
 388
 389 //  THE FINALIZATION METHOD BODY :
 390 //    Here does nothing
 391 //    but this is where you should desallocate the internal/output pointers
 392 //    if any
 393
 394 }
 395 }
 396 // EO namespace bbcreaVtk
 397
 398