| 40 |
|
* |
| 41 |
|
* ConvexHull.cpp |
| 42 |
|
* |
| 43 |
< |
* Purpose: To calculate convexhull, hull volume and radius |
| 44 |
< |
* using the CGAL library. |
| 43 |
> |
* Purpose: To calculate convexhull, hull volume libqhull. |
| 44 |
|
* |
| 45 |
|
* Created by Charles F. Vardeman II on 11 Dec 2006. |
| 46 |
|
* @author Charles F. Vardeman II |
| 47 |
< |
* @version $Id: ConvexHull.cpp,v 1.1 2006-12-14 19:32:32 chuckv Exp $ |
| 47 |
> |
* @version $Id: ConvexHull.cpp,v 1.2 2007-05-29 22:50:14 chuckv Exp $ |
| 48 |
|
* |
| 49 |
|
*/ |
| 50 |
|
|
| 52 |
|
#include <iostream> |
| 53 |
|
#include <fstream> |
| 54 |
|
|
| 55 |
+ |
char options[] = "qhull Qt FA"; |
| 56 |
+ |
int dim_ = 3; |
| 57 |
|
|
| 58 |
|
using namespace oopse; |
| 59 |
|
|
| 60 |
+ |
ConvexHull::ConvexHull(){} |
| 61 |
|
|
| 62 |
|
|
| 61 |
– |
|
| 63 |
|
bool ConvexHull::genHull(std::vector<Vector3d> pos) |
| 64 |
|
{ |
| 65 |
+ |
FILE *outfile = stdout; |
| 66 |
+ |
FILE *errfile = stderr; |
| 67 |
+ |
facetT *facet; |
| 68 |
+ |
int exitcode; |
| 69 |
+ |
boolT ismalloc = False; |
| 70 |
+ |
int curlong,totlong; |
| 71 |
+ |
|
| 72 |
+ |
int numpoints = pos.size(); |
| 73 |
+ |
|
| 74 |
+ |
coordT points[numpoints][dim_]; |
| 75 |
+ |
|
| 76 |
+ |
for (int i=0; i<numpoints; i++) |
| 77 |
+ |
{ |
| 78 |
+ |
points[i][0] = pos[i][0]; |
| 79 |
+ |
points[i][1] = pos[i][1]; |
| 80 |
+ |
points[i][2] = pos[i][2]; |
| 81 |
+ |
} |
| 82 |
+ |
|
| 83 |
|
|
| 65 |
– |
std::vector<Point_3> points; |
| 66 |
– |
points.reserve(pos.size()); |
| 67 |
– |
// Copy the positon vector into a points vector for cgal. |
| 68 |
– |
for (int i = 0; i < pos.size(); ++i) |
| 69 |
– |
{ |
| 70 |
– |
Point_3 pt(pos[i][0],pos[i][1],pos[i][2]); |
| 71 |
– |
points.push_back(pt); |
| 72 |
– |
} |
| 84 |
|
|
| 85 |
< |
// compute convex hull |
| 86 |
< |
CGAL::convex_hull_3(points.begin(), points.end(), ch_object); |
| 87 |
< |
// Make sure hull is a polyhedron |
| 88 |
< |
if ( CGAL::assign(ch_polyhedron, ch_object) ) |
| 89 |
< |
{ |
| 90 |
< |
return true; |
| 91 |
< |
} |
| 92 |
< |
else |
| 93 |
< |
{ |
| 94 |
< |
return false; |
| 95 |
< |
} |
| 85 |
> |
qh_initflags (options); |
| 86 |
> |
qh_init_B (points[0], numpoints, dim_, ismalloc); |
| 87 |
> |
qh_qhull(); |
| 88 |
> |
qh_check_output(); |
| 89 |
> |
|
| 90 |
> |
|
| 91 |
> |
|
| 92 |
> |
qh_getarea(qh facet_list); |
| 93 |
> |
volume_ = qh totvol; |
| 94 |
> |
area_ = qh totarea; |
| 95 |
> |
|
| 96 |
> |
|
| 97 |
> |
|
| 98 |
> |
qh_freeqhull(!qh_ALL); |
| 99 |
> |
qh_memfreeshort (&curlong, &totlong); |
| 100 |
> |
if (curlong || totlong) |
| 101 |
> |
fprintf (errfile, "qhull internal warning (main): did not free %d bytes of long memory (%d pieces)\n", |
| 102 |
> |
totlong, curlong); |
| 103 |
> |
|
| 104 |
> |
|
| 105 |
> |
return true; |
| 106 |
|
} |
| 107 |
|
|
| 108 |
+ |
|
| 109 |
|
RealType ConvexHull::getVolume() |
| 110 |
|
{ |
| 111 |
< |
/* |
| 90 |
< |
std::list<Point> L; |
| 91 |
< |
L.push_front(Point(0,0,0)); |
| 92 |
< |
L.push_front(Point(1,0,0)); |
| 93 |
< |
L.push_front(Point(0,1,0)); |
| 94 |
< |
|
| 95 |
< |
Triangulation T(L.begin(), L.end()); |
| 96 |
< |
|
| 97 |
< |
int n = T.number_of_vertices(); |
| 98 |
< |
|
| 99 |
< |
// insertion from a vector : |
| 100 |
< |
std::vector<Point> V(3); |
| 101 |
< |
V[0] = Point(0,0,1); |
| 102 |
< |
V[1] = Point(1,1,1); |
| 103 |
< |
V[2] = Point(2,2,2); |
| 104 |
< |
|
| 105 |
< |
n = n + T.insert(V.begin(), V.end()); |
| 106 |
< |
|
| 107 |
< |
assert( n == 6 ); // 6 points have been inserted |
| 108 |
< |
assert( T.is_valid() ); // checking validity of T |
| 109 |
< |
|
| 110 |
< |
double sum_v = 0; |
| 111 |
< |
for(Triangulation::Cell_iterator c_it = T.cells_begin(); c_it != T.cells_end(); ++c_it) |
| 112 |
< |
{ |
| 113 |
< |
sum_v += T.tetrahedron(c_it).volume(); |
| 114 |
< |
} |
| 115 |
< |
std::cout << "sum_v " << sum_v << std::endl; |
| 116 |
< |
*/ |
| 117 |
< |
return 0.0; |
| 111 |
> |
return volume_; |
| 112 |
|
} |
| 113 |
|
|
| 114 |
|
void ConvexHull::geomviewHull(const std::string& geomFileName) |
| 119 |
|
//create new .md file based on old .md file |
| 120 |
|
newGeomFile.open(geomFileName.c_str()); |
| 121 |
|
|
| 128 |
– |
// Write polyhedron in Object File Format (OFF). |
| 129 |
– |
CGAL::set_ascii_mode( std::cout); |
| 130 |
– |
newGeomFile << "OFF" << std::endl << ch_polyhedron.size_of_vertices() << ' ' |
| 131 |
– |
<< ch_polyhedron.size_of_facets() << " 0" << std::endl; |
| 132 |
– |
std::copy( ch_polyhedron.points_begin(), ch_polyhedron.points_end(), |
| 133 |
– |
std::ostream_iterator<Point_3>( newGeomFile, "\n")); |
| 134 |
– |
for ( Facet_iterator i = ch_polyhedron.facets_begin(); i != ch_polyhedron.facets_end(); ++i) |
| 135 |
– |
{ |
| 136 |
– |
Halfedge_facet_circulator j = i->facet_begin(); |
| 137 |
– |
// Facets in polyhedral surfaces are at least triangles. |
| 138 |
– |
CGAL_assertion( CGAL::circulator_size(j) >= 3); |
| 139 |
– |
newGeomFile << CGAL::circulator_size(j) << ' '; |
| 140 |
– |
do |
| 141 |
– |
{ |
| 142 |
– |
newGeomFile << ' ' << std::distance(ch_polyhedron.vertices_begin(), j->vertex()); |
| 143 |
– |
} |
| 144 |
– |
while ( ++j != i->facet_begin()); |
| 145 |
– |
newGeomFile << std::endl; |
| 146 |
– |
} |
| 122 |
|
|
| 123 |
|
newGeomFile.close(); |
| 124 |
|
|
