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[KL <>]

Furthermore, trying that code with a simple triangle yields incorrect result..

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15:40, 3 September 2022, "KL ( via cgal-discuss Mailing List)" <>:

Hi,

 

I was trying parametrization of a triangulated mesh, but the output is empty:

 

SurfaceMesh sm;

 

// load my vertices into the sm. Already triangulated. Clockwise. not CCW.

 

// a single mesh can be made of multiple triangle faces. So register them:

for ( u32 inner = 0; inner < consecutive_triangles_for_one_face; inner += 1 ){

 

        auto &tri = triangulated_input[inner].outer();

        auto v1 = sm.add_vertex( {tri[0].x(), tri[0].y(), tri[0].z()} );

        auto v2 = sm.add_vertex( {tri[1].x(), tri[1].y(), tri[1].z()} );

        auto v3 = sm.add_vertex( {tri[2].x(), tri[2].y(), tri[2].z()} );

 

        sm.add_face( v1, v2, v3 );

 

}

 

vector <Vector2f> tmp_uvs;

//from then on, I follow the example structure:

halfedge_descriptor bhd = CGAL::Polygon_mesh_processing::longest_border( sm ).first;

UV_pmap uv_map = sm.add_property_map <vertex_descriptor, Point_2> ( "h:uv" ).first;

auto err = SMP::parameterize( sm, bhd, uv_map );

 

if ( err != SMP::OK ){

        std::cerr << "Error: " << SMP::get_error_message( err ) << std::endl;

 

}

 

//I want to extract the x/y values for each vertice

for ( auto &e : uv_map ){

    auto &t = e;

    tmp_uvs.push_back( {float(t.x() ), float(t.y() )} );

 

}

 

But I only get 0's. I need to add the halfedges myself ?

 

Thanks for your help

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MKL

 

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