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user_eg3_r.cpp
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Fri, Aug 9, 22:27

user_eg3_r.cpp
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#//! user_eg3_r.cpp -- Invoke rbox and qhull from C++
#include "libqhullcpp/RboxPoints.h"
#include "libqhullcpp/QhullError.h"
#include "libqhullcpp/QhullQh.h"
#include "libqhullcpp/QhullFacet.h"
#include "libqhullcpp/QhullFacetList.h"
#include "libqhullcpp/QhullLinkedList.h"
#include "libqhullcpp/QhullVertex.h"
#include "libqhullcpp/Qhull.h"
#include <cstdio> /* for printf() of help message */
#include <ostream>
using std::cerr;
using std::cin;
using std::cout;
using std::endl;
using orgQhull::Qhull;
using orgQhull::QhullError;
using orgQhull::QhullFacet;
using orgQhull::QhullFacetList;
using orgQhull::QhullQh;
using orgQhull::RboxPoints;
using orgQhull::QhullVertex;
using orgQhull::QhullVertexSet;
int main(int argc, char **argv);
int user_eg3(int argc, char **argv);
char prompt[]= "\n\
user_eg3 -- demonstrate calling rbox and qhull from C++.\n\
\n\
user_eg3 is statically linked to reentrant qhull. If user_eg3\n\
fails immediately, it is probably linked to the non-reentrant qhull.\n\
Try 'user_eg3 rbox qhull \"T1\"'\n\
\n\
eg-100 Run the example in qh-code.htm\n\
rbox \"200 D4\" ... Generate points from rbox\n\
qhull \"d p\" ... Run qhull and produce output\n\
qhull-cout \"o\" ... Run qhull and produce output to cout\n\
qhull \"T1\" ... Run qhull with level-1 trace to cerr\n\
facets Print facets when done\n\
\n\
For example\n\
user_eg3 rbox qhull\n\
user_eg3 rbox qhull d\n\
user_eg3 rbox \"10 D2\" \"2 D2\" qhull \"s p\" facets\n\
\n\
";
/*--------------------------------------------
-user_eg3- main procedure of user_eg3 application
*/
int main(int argc, char **argv) {
QHULL_LIB_CHECK
if(argc==1){
cout << prompt;
return 1;
}
try{
return user_eg3(argc, argv);
}catch(QhullError &e){
cerr << e.what() << std::endl;
return e.errorCode();
}
}//main
int user_eg3(int argc, char **argv)
{
if(strcmp(argv[1], "eg-100")==0){
RboxPoints rbox("100");
Qhull q(rbox, "");
QhullFacetList facets= q.facetList();
cout << facets;
return 0;
}
bool printFacets= false;
RboxPoints rbox;
Qhull qhull;
int readingRbox= 0;
int readingQhull= 0;
for(int i=1; i<argc; i++){
if(strcmp(argv[i], "rbox")==0){
if(readingRbox!=0 || readingQhull!=0){
cerr << "user_eg3 -- \"rbox\" must be first" << endl;
return 1;
}
readingRbox++;
}else if(strcmp(argv[i], "qhull")==0
|| strcmp(argv[i], "qhull-cout")==0){
if(readingQhull){
cerr << "user_eg3 -- only one \"qhull\" or \"qhull-cout\" allowed." << endl;
return 1;
}
if(strcmp(argv[i], "qhull-cout")==0){
qhull.setOutputStream(&cout);
}
if(rbox.isEmpty()){
if(readingRbox){
rbox.appendPoints("10 D2");
}else{
cerr << "Enter dimension count coordinates. End with ^Z (Windows) or ^D (Unix).\n";
rbox.appendPoints(cin);
}
}
readingQhull++;
readingRbox= 0;
}else if(strcmp(argv[i], "facets")==0){
printFacets= true;
}else if(readingRbox){
readingRbox++;
cerr << "rbox " << argv[i] << endl;
rbox.appendPoints(argv[i]);
if(rbox.hasRboxMessage()){
cerr << "user_eg3 " << argv[i] << " -- " << rbox.rboxMessage();
return rbox.rboxStatus();
}
}else if(readingQhull){
if(readingQhull==1){
qhull.runQhull(rbox, argv[i]);
qhull.outputQhull();
}else{
qhull.outputQhull(argv[i]);
}
readingQhull++;
if(qhull.hasQhullMessage()){
cerr << "\nResults of " << argv[i] << "\n" << qhull.qhullMessage();
qhull.clearQhullMessage();
}
}else{
cerr << "user_eg3 error: Expecting qhull, qhull-cout, or rbox. Got " << argv[i] << endl;
return 1;
}
}//foreach argv
if(readingRbox){
cout << rbox;
return 0;
}
if(readingQhull==1){ // e.g., rbox 10 qhull
qhull.runQhull(rbox, "");
qhull.outputQhull();
if(qhull.hasQhullMessage()){
cerr << "\nResults of qhull\n" << qhull.qhullMessage();
qhull.clearQhullMessage();
}
}
if(qhull.hasOutputStream()){
return 0;
}
if(printFacets){
QhullFacetList facets= qhull.facetList();
cout << "\nFacets created by Qhull::runQhull()\n" << facets;
}
return 0;
}//user_eg3

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