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root/OpenMD/trunk/src/math/ConvexHull.cpp
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Comparing trunk/src/math/ConvexHull.cpp (file contents):
Revision 1143 by chuckv, Wed May 30 19:51:07 2007 UTC vs.
Revision 1374 by chuckv, Tue Oct 20 20:05:28 2009 UTC

# Line 1 | Line 1
1 < /* Copyright (c) 2006 The University of Notre Dame. All Rights Reserved.
1 > /* Copyright (c) 2008, 2009 The University of Notre Dame. All Rights Reserved.
2   *
3   * The University of Notre Dame grants you ("Licensee") a
4   * non-exclusive, royalty free, license to use, modify and
# Line 44 | Line 44
44   *
45   *  Created by Charles F. Vardeman II on 11 Dec 2006.
46   *  @author  Charles F. Vardeman II
47 < *  @version $Id: ConvexHull.cpp,v 1.4 2007-05-30 19:51:07 chuckv Exp $
47 > *  @version $Id: ConvexHull.cpp,v 1.16 2009-10-20 20:05:28 chuckv Exp $
48   *
49   */
50  
51 + /* Standard includes independent of library */
52 +
53   #include <iostream>
54   #include <fstream>
55 + #include <list>
56 + #include <algorithm>
57 + #include <iterator>
58   #include "math/ConvexHull.hpp"
59 + #include "utils/simError.h"
60  
61 + #ifdef IS_MPI
62 + #include <mpi.h>
63 + #endif
64 +
65   using namespace oopse;
66  
67 < ConvexHull::ConvexHull() : dim_(3), options_("qhull Qt FA") {
67 > #ifdef HAVE_QHULL
68 > extern "C"
69 > {
70 > #include <qhull/qhull.h>
71 > #include <qhull/mem.h>
72 > #include <qhull/qset.h>
73 > #include <qhull/geom.h>
74 > #include <qhull/merge.h>
75 > #include <qhull/poly.h>
76 > #include <qhull/io.h>
77 > #include <qhull/stat.h>
78   }
79  
80 < bool ConvexHull::genHull(std::vector<Vector3d> pos) {
81 <  FILE *outfile = stdout;
82 <  FILE *errfile = stderr;
80 > /* Old options Qt Qu Qg QG0 FA */
81 > /* More old opts Qc Qi Pp*/
82 >
83 > ConvexHull::ConvexHull() : Hull(), dim_(3), options_("qhull Qt Pp") {
84 > }
85 >
86 > void ConvexHull::computeHull(std::vector<StuntDouble*> bodydoubles) {
87 >
88 >  int numpoints = bodydoubles.size();
89 >
90 >  Triangles_.clear();
91 >  
92 >  vertexT *vertex, **vertexp;
93    facetT *facet;
94 <  int exitcode;
95 <  boolT ismalloc = False;
66 <  int curlong,totlong;
94 >  setT *vertices;
95 >  int curlong, totlong;
96    
97 <  int numpoints = pos.size();
98 <
70 <  coordT* points;
71 <  points = (coordT*) malloc(sizeof(coordT) * (numpoints*dim_));
97 >  std::vector<double> ptArray(numpoints*3);
98 >  std::vector<bool> isSurfaceID(numpoints);
99  
100 <  for (int i=0; i<numpoints; i++) {
101 <    points[dim_ * i] = pos[i][0];
102 <    points[dim_ * i + 1] = pos[i][1];
103 <    points[dim_ * i + 2] = pos[i][2];          
100 >  // Copy the positon vector into a points vector for qhull.
101 >  std::vector<StuntDouble*>::iterator SD;
102 >  int i = 0;
103 >  for (SD =bodydoubles.begin(); SD != bodydoubles.end(); ++SD){
104 >    Vector3d pos = (*SD)->getPos();      
105 >    ptArray[dim_ * i] = pos.x();
106 >    ptArray[dim_ * i + 1] = pos.y();
107 >    ptArray[dim_ * i + 2] = pos.z();
108 >    i++;
109    }
110    
111 +  boolT ismalloc = False;
112 +  /* Clean up memory from previous convex hull calculations*/
113    
114 <  qh_initflags (const_cast<char *>(options_.c_str()));
115 <  qh_init_B (points, numpoints, dim_, ismalloc);
116 <  qh_qhull();
117 <  qh_check_output();
114 >  if (qh_new_qhull(dim_, numpoints, &ptArray[0], ismalloc,
115 >                   const_cast<char *>(options_.c_str()), NULL, stderr)) {
116 >
117 >    sprintf(painCave.errMsg, "ConvexHull: Qhull failed to compute convex hull");
118 >    painCave.isFatal = 1;
119 >    simError();
120 >    
121 >  } //qh_new_qhull
122 >
123 >
124 > #ifdef IS_MPI
125 >  //If we are doing the mpi version, set up some vectors for data communication
126    
127 +  int nproc = MPI::COMM_WORLD.Get_size();
128 +  int myrank = MPI::COMM_WORLD.Get_rank();
129 +  int localHullSites = 0;
130 +  int* hullSitesOnProc = new int[nproc];
131 +  int* coordsOnProc = new int[nproc];
132 +  int* displacements = new int[nproc];
133 +  int* vectorDisplacements = new int[nproc];
134 +
135 +  std::vector<double> coords;
136 +  std::vector<double> vels;
137 +  std::vector<int> objectIDs;
138 +  std::vector<double> masses;
139 +
140 +  FORALLvertices{
141 +    localHullSites++;
142 +    
143 +    int idx = qh_pointid(vertex->point);
144 +    coords.push_back(ptArray[dim_  * idx]);
145 +    coords.push_back(ptArray[dim_  * idx + 1]);
146 +    coords.push_back(ptArray[dim_  * idx + 2]);
147 +
148 +    StuntDouble* sd = bodydoubles[idx];
149 +
150 +    Vector3d vel = sd->getVel();
151 +    vels.push_back(vel.x());
152 +    vels.push_back(vel.y());
153 +    vels.push_back(vel.z());
154 +
155 +    masses.push_back(sd->getMass());
156 +  }
157 +
158 +  MPI::COMM_WORLD.Allgather(&localHullSites, 1, MPI::INT, &hullSitesOnProc[0],
159 +                            1, MPI::INT);
160 +
161 +  int globalHullSites = 0;
162 +  for (int iproc = 0; i < nproc; iproc++){
163 +    globalHullSites += hullSitesOnProc[iproc];
164 +    coordsOnProc[iproc] = dim_ * hullSitesOnProc[iproc];
165 +  }
166 +
167 +  displacements[0] = 0;
168 +  vectorDisplacements[0] = 0;
169    
170 +  for (int iproc = 1; i < nproc; iproc++){
171 +    displacements[iproc] = displacements[iproc-1] + hullSitesOnProc[iproc-1];
172 +    vectorDisplacements[iproc] = vectorDisplacements[iproc-1] + coordsOnProc[iproc-1];
173 +  }
174 +
175 +  std::vector<double> globalCoords(dim_*globalHullSites);
176 +  std::vector<double> globalVels(dim_*globalHullSites);
177 +  std::vector<double> globalMasses(globalHullSites);
178 +  int count = coordsOnProc[myrank];
179    
180 <  qh_getarea(qh facet_list);
181 <  volume_ = qh totvol;                                                  
182 <  area_ = qh totarea;                                          
180 >  MPI::COMM_WORLD.Allgatherv(&coords[0], count, MPI::DOUBLE,
181 >                             &globalCoords[0], &coordsOnProc[0], &vectorDisplacements[0],
182 >                             MPI::DOUBLE);
183 >
184 >  MPI::COMM_WORLD.Allgatherv(&vels[0], count, MPI::DOUBLE,
185 >                             &globalVels[0], &coordsOnProc[0], &vectorDisplacements[0],
186 >                             MPI::DOUBLE);
187 >
188 >  MPI::COMM_WORLD.Allgatherv(&masses[0], localHullSites, MPI::DOUBLE,
189 >                             &globalMasses[0], &hullSitesOnProc[0], &displacements[0],
190 >                             MPI::DOUBLE);
191 >
192 >  // Free previous hull
193 >  qh_freeqhull(!qh_ALL);
194 >  qh_memfreeshort(&curlong, &totlong);
195 >  if (curlong || totlong)
196 >    std::cerr << "qhull internal warning (main): did not free %d bytes of long memory (%d pieces) "
197 >              << totlong << curlong << std::endl;
198    
199 +  if (qh_new_qhull(dim_, globalHullSites, &globalCoords[0], ismalloc,
200 +                   const_cast<char *>(options_.c_str()), NULL, stderr)){
201 +    
202 +    sprintf(painCave.errMsg, "ConvexHull: Qhull failed to compute global convex hull");
203 +    painCave.isFatal = 1;
204 +    simError();
205 +    
206 +  } //qh_new_qhull
207 +
208 + #endif
209 +
210 +  FORALLfacets {  
211 +    Triangle face;
212 +
213 +    Vector3d V3dNormal(facet->normal[0], facet->normal[1], facet->normal[2]);
214 +    face.setNormal(V3dNormal);
215 +    
216 +    RealType faceArea = qh_facetarea(facet);
217 +    face.setArea(faceArea);
218 +    
219 +    vertices = qh_facet3vertex(facet);
220 +      
221 +    coordT *center = qh_getcenter(vertices);
222 +    Vector3d V3dCentroid(center[0], center[1], center[2]);
223 +    face.setCentroid(V3dCentroid);
224 +
225 +    Vector3d faceVel = V3Zero;
226 +    Vector3d p[3];
227 +    RealType faceMass = 0.0;
228 +    int ver = 0;
229 +
230 +    FOREACHvertex_(vertices){
231 +      int id = qh_pointid(vertex->point);
232 +      p[ver][0] = vertex->point[0];
233 +      p[ver][1] = vertex->point[1];
234 +      p[ver][2] = vertex->point[2];
235 +      
236 +      Vector3d vel;
237 +      RealType mass;
238 +
239 + #ifdef IS_MPI
240 +      vel = Vector3d(globalVels[dim_ * id],
241 +                     globalVels[dim_ * id + 1],
242 +                     globalVels[dim_ * id + 2]);
243 +      mass = globalMasses[id];
244 +
245 +      // localID will be between 0 and hullSitesOnProc[myrank] if we own this guy.
246 +      int localID = id - displacements[myrank];
247 +      if (id >= 0 && id < hullSitesOnProc[myrank])
248 +        face.addVertexSD(bodydoubles[localID]);
249 +      else
250 +        face.addVertexSD(NULL);
251 + #else
252 +      vel = bodydoubles[id]->getVel();
253 +      mass = bodydoubles[id]->getMass();
254 +      face.addVertexSD(bodydoubles[id]);      
255 + #endif
256 +        
257 +      faceVel = faceVel + vel;
258 +      faceMass = faceMass + mass;
259 +      ver++;      
260 +    } //Foreachvertex
261 +
262 +    face.addVertices(p[0], p[1], p[2]);
263 +    face.setFacetMass(faceMass);
264 +    face.setFacetVelocity(faceVel/3.0);
265 +    Triangles_.push_back(face);
266 +    qh_settempfree(&vertices);      
267 +
268 +  } //FORALLfacets
269    
270 +  qh_getarea(qh facet_list);
271 +  volume_ = qh totvol;
272 +  area_ = qh totarea;
273 +
274 + #ifdef IS_MPI
275 +  delete [] hullSitesOnProc;
276 +  delete [] coordsOnProc;
277 +  delete [] displacements;
278 +  delete [] vectorDisplacements;
279 + #endif
280    
281    qh_freeqhull(!qh_ALL);
282 <  qh_memfreeshort (&curlong, &totlong);
282 >  qh_memfreeshort(&curlong, &totlong);
283    if (curlong || totlong)
284 <    fprintf (errfile, "qhull internal warning (main): did not free %d bytes of long memory (%d pieces)\n",
285 <             totlong, curlong);
98 <  
99 <  
100 <  return true;
284 >    std::cerr << "qhull internal warning (main): did not free %d bytes of long memory (%d pieces) "
285 >              << totlong << curlong << std::endl;    
286   }
287  
288  
104 – RealType ConvexHull::getVolume() {
105 –  return volume_;
106 – }
289  
290 < void ConvexHull::geomviewHull(const std::string& geomFileName) {
290 > void ConvexHull::printHull(const std::string& geomFileName) {
291 >  FILE *newGeomFile;
292    
110 –  std::ofstream newGeomFile;
111 –  
293    //create new .md file based on old .md file
294 <  newGeomFile.open(geomFileName.c_str());
294 >  newGeomFile = fopen(geomFileName.c_str(), "w");
295 >  qh_findgood_all(qh facet_list);
296 >  for (int i = 0; i < qh_PRINTEND; i++)
297 >    qh_printfacets(newGeomFile, qh PRINTout[i], qh facet_list, NULL, !qh_ALL);
298    
299 <  
116 <  newGeomFile.close();
299 >  fclose(newGeomFile);
300   }
301 + #endif //QHULL

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