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I am trying to compile an example from the book CGAL Arrangements and Their Applications: A Step-by-Step Guide By Efi Fogel, Dan Halperin, Ron Wein. The example can be seen at this link:

https://books.google.ca/books?id=u0CONtnwi9YC&pg=PA203&lpg=PA203&dq=CGAL+shadow&source=bl&ots=16oLfsUPYy&sig=YM3Da9lqB5-LNjGcpip_v_fBWOw&hl=en&sa=X&ei=ajCUVf_XKobloATxi6noDA&ved=0CCYQ6AEwAQ#v=onepage&q&f=false

For some reason I get a fierce compilation error that is very vague. Here is what I have written so far:

Here is the main function that actually casts the shadow. I have commented the line causing the compile error and posted the error itself below.

#include <boost/lexical_cast.hpp>
#include <iostream>
#include <string>
#include <CGAL/Cartesian.h>
#include <CGAL/Filtered_kernel.h>
#include <CGAL/Arrangement_2.h>
#include <CGAL/Polyhedron_3.h>
#include <CGAL/Direction_3.h>
#include <fstream>
#include <CGAL/IO/Polyhedron_iostream.h>
#include <CGAL/Polyhedron_traits_with_normals_3.h>
#include <CGAL/IO/Polyhedron_iostream.h>
#include <CGAL/IO/Gps_iostream.h>
#include "Normal_equation.h"
#include "bops_set_linear.h"
typedef double Real;
//typedef CGAL::Cartesian<Real> Kernel0;
// Use a filtered kernel so that all predicates are exact.
//typedef CGAL::Filtered_kernel<Kernel0> Kernel;
typedef CGAL::Polyhedron_traits_with_normals_3<Kernel> Polyhedron_traits;
typedef CGAL:: Polyhedron_3<Polyhedron_traits> Polyhedron;
typedef Kernel::Point_3 Point_3;
typedef Kernel::Plane_3 Plane_3;
typedef Kernel::Direction_3 Direction_3;

int main(int argc, char* argv[]){

    CGAL_assertion(argc > 3);
    Kernel::FT x = boost::lexical_cast<double>(argv[1]); //Take in x coordinate for shadow plane
    Kernel::FT y = boost::lexical_cast<double>(argv[2]); //Take in y coordinate for shadow plane
    Kernel::FT z = boost::lexical_cast<double>(argv[3]); //Take in z coordinate for shadow plane
    Direction_3 direction(x, y, z);

    const char* filename = (argc > 4) ? argv[4] : "hand.off";
    std::ifstream inFile(filename);

    if (!inFile.is_open()){
        std::cerr << "Failed to open file " << filename << "\n";
        exit(1);
    }

    Polyhedron polyhedron;
    inFile >> polyhedron;

    std::transform(polyhedron.facets_begin(), polyhedron.facets_end(), polyhedron.planes_begin(), Normal_equation());
    std::list<Polygon> polygons;

    Kernel kernel;
    Kernel::Compare_z_3 cmp_z = kernel.compare_z_3_object();
    Kernel::Construct_projected_xy_point_2 proj = kernel.construct_projected_xy_point_2_object();
    Kernel::Construct_translated_point_3 translate = kernel.construct_translated_point_3_object();
    Point_3 origin = kernel.construct_point_3_object()(CGAL::ORIGIN);
    Plane_3 plane = kernel.construct_plane_3_object()(origin, direction);
    Point_3 r = translate(origin, direction.vector());
    for (Polyhedron::Facet_const_iterator fit = polyhedron.facets_begin(); fit != polyhedron.facets_end(); ++fit){

        if (CGAL::angle(translate(origin, fit->plane()), origin, r) == CGAL::OBTUSE) continue;
    //Go over the facet vertices and project them
    Polygon polygon;
    Polyhedron::Halfedge_around_facet_const_circulator hit = fit->facet_begin();
    do{
        const Point_3& point = hit->vertex()->point();
        polygon.push_back(proj(plane, point));
    } while (++hit != fit->facet_begin());
    polygons.push_back(polygon);
}
polyhedron.clear();
Polygon_set S;
S.join(polygons.begin(), polygons.end()); //THIS IS THE LINE CAUSING THE COMPILE ERROR
std::cout << S;
return 0;
}

Here is the Normal_Equation struct in Normal_equation.h

struct Normal_equation{
    template <typename Facet> typename Facet::Plane_3 operator()(Facet & f){
        typename Facet::Halfedge_handle h = f.halfedge();
        return CGAL::cross_product(h->next()->vertex()->point() - h->vertex()->point(), h->next()->next()->vertex()->point() - h->next()->vertex()->point());
    }
};

The following two files are used as type setters: bops_linear.h

#ifndef BOPS_LINEAR_H
#define BOPS_LINEAR_H

#include <list>

#include <CGAL/Exact_predicates_exact_constructions_kernel.h>
#include <CGAL/Boolean_set_operations_2.h>

typedef CGAL::Exact_predicates_exact_constructions_kernel Kernel;
typedef Kernel::Point_2                            Point;
typedef CGAL::Polygon_2<Kernel>                    Polygon;
typedef CGAL::Polygon_with_holes_2<Kernel>         Polygon_with_holes;
typedef std::list<Polygon_with_holes>              Pgn_with_holes_container;

#endif

bops_set_linear.h

#ifndef BOPS_SET_LINEAR_H
#define BOPS_SET_LINEAR_H

#include "bops_linear.h"

#include <CGAL/Polygon_set_2.h>

typedef CGAL::Polygon_set_2<Kernel>             Polygon_set;

#endif

I am no expert with this stuff so I included my Makefile so you can see what I have linked

CXX = g++

CXXFLAGS = -g -O -frounding-math
Link = -lCGAL -lmpfr -lgmp -DBOOST_LOG_DYN_LINK -lboost_thread

all: main

main: main.cpp Normal_equation.h 
    $(CXX) $(CXXFLAGS) -o $@ main.cpp $(Link)

clean:
    rm -f main.o main

Here is where it gets really nasty. The compile error is a mile long and is really vague. It is a little beyond me. I excedded the character count for this post so I have posted it in my Onedrive and you can see it here: http://1drv.ms/1eHZkuq

Nick
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  • Have your tried to compile the original example? They can all be obtained from http://acg.cs.tau.ac.il/cgal-arrangement-book/source-code-data-and-miscellaneous-files – Efi Fogel Jul 09 '15 at 12:11
  • Oh thank you.I didn't know that. Will try and report back – Nick Jul 09 '15 at 16:16

1 Answers1

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I don't know why but I managed to get it to compile by changing the Kernel. I changed the file bops_liner.h to

#ifndef BOPS_LINEAR_H
#define BOPS_LINEAR_H

#include <list>
#include <CGAL/Simple_cartesian.h>
//#include <CGAL/Exact_predicates_exact_constructions_kernel.h>
#include <CGAL/Boolean_set_operations_2.h>


typedef double Real;
typedef CGAL::Simple_cartesian<Real> Kernel;
//typedef CGAL::Exact_predicates_exact_constructions_kernel Kernel;
typedef Kernel::Point_2                            Point;
typedef CGAL::Polygon_2<Kernel>                    Polygon;
typedef CGAL::Polygon_with_holes_2<Kernel>         Polygon_with_holes;
typedef std::list<Polygon_with_holes>              Pgn_with_holes_container;

#endif
Nick
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