libigl/tests/include/igl/writePLY.cpp

#include <test_common.h>
#include <igl/readPLY.h>
#include <igl/writePLY.h>
#include <fstream>
#include <string>
#include <vector>

TEST_CASE("writePLY: bunny.ply", "[igl]")
{
    std::ifstream f(test_common::data_path("bunny.ply"));
    REQUIRE (f.good());
    f.close();
    
    Eigen::MatrixXd V1,N1,UV1,VD1,FD1,ED1;
    std::vector<std::string> Vheader1,Fheader1,Eheader1,comments1;

    Eigen::MatrixXi F1,E1;

    // load test data first
    REQUIRE (igl::readPLY(test_common::data_path("bunny.ply"), V1, F1, E1, N1, UV1, VD1,Vheader1, FD1,Fheader1, ED1,Eheader1,comments1));

    // add more data 
    Vheader1.push_back("dummy_data");
    Eigen::VectorXd dummy_data(V1.rows());
    for(size_t i=0;i<V1.rows();++i)
        dummy_data(i)=(double)i;
    Eigen::MatrixXd VD2(V1.rows(),VD1.cols()+1);
    VD2<<VD1,dummy_data;


    // test that saving preserves all the data, including new data column
    REQUIRE (igl::writePLY("test_bunny.ply", V1, F1, E1, N1, UV1, VD2, Vheader1, FD1,Fheader1, ED1, Eheader1, comments1, true));

    Eigen::MatrixXd V,N,UV,VD,FD,ED;
    Eigen::MatrixXi F,E;
    std::vector<std::string> Vheader,Fheader,Eheader,comments;

    // test that saving preserves all the data
    REQUIRE (igl::readPLY("test_bunny.ply", V, F, E, N, UV, VD,Vheader, FD,Fheader, ED,Eheader, comments));

    REQUIRE (V.rows() == 35947);
    REQUIRE (V.cols() == 3);
    REQUIRE (F.rows() == 69451);
    REQUIRE (F.cols() == 3);
    // no edge data
    REQUIRE (E.rows() == 0);
    REQUIRE (E.cols() == 0);

    // no normals or texture coordinates
    REQUIRE (N.rows() == 0);
    REQUIRE (N.cols() == 0);
    REQUIRE (UV.rows() == 0);
    REQUIRE (UV.cols() == 0);

    // this bunny have additonal data
    REQUIRE (VD.rows() == 35947);
    REQUIRE (VD.cols() == 3);

    // the dummy column contents check
    for(size_t i=0;i<V.rows();++i)
        REQUIRE (VD(i,2) == (double)i);

    REQUIRE (Vheader.size() == 3);
    REQUIRE (Vheader[0] == "confidence" );
    REQUIRE (Vheader[1] == "intensity" );
    REQUIRE (Vheader[2] == "dummy_data" );

    // no Face data or edge data
    REQUIRE (FD.rows() == 0);
    REQUIRE (FD.cols() == 0);
    REQUIRE (Fheader.size() == 0);

    REQUIRE (ED.rows() == 0);
    REQUIRE (ED.cols() == 0);
    REQUIRE (Eheader.size() == 0);

    // there are comments
    REQUIRE (comments.size() == 2);
}