class OpenMesh < Formula
  desc "Generic data structure to represent and manipulate polygonal meshes"
  homepage "https://openmesh.org/"
  url "https://www.openmesh.org/media/Releases/6.3/OpenMesh-6.3.tar.bz2"
  sha256 "b97be926e430bcda10f44f2d4bbe2657b0778c2eed17346f4f32c06db36843ce"
  head "https://www.graphics.rwth-aachen.de:9000/OpenMesh/OpenMesh.git"

  bottle do
    cellar :any
    sha256 "676e75669a5b5d754bb4bfcb44ae218ee19e51a2ee337a73d02d7afa3975dbd4" => :sierra
    sha256 "adcf854d3ed46bdd19c10f04537239991a9ca96e06c078f16c1d8f303f411561" => :el_capitan
    sha256 "3ea01760dd5aed9a42c1961aaf020e146a0b9a57fcaab1181803a17525fca1b9" => :yosemite
  end

  depends_on "cmake" => :build

  def install
    mkdir "build" do
      system "cmake", "..", "-DBUILD_APPS=OFF", *std_cmake_args
      system "make", "install"
    end
  end

  test do
    (testpath/"test.cpp").write <<-EOS.undent
    #include <iostream>
    #include <OpenMesh/Core/IO/MeshIO.hh>
    #include <OpenMesh/Core/Mesh/PolyMesh_ArrayKernelT.hh>
    typedef OpenMesh::PolyMesh_ArrayKernelT<>  MyMesh;
    int main()
    {
        MyMesh mesh;
        MyMesh::VertexHandle vhandle[4];
        vhandle[0] = mesh.add_vertex(MyMesh::Point(-1, -1,  1));
        vhandle[1] = mesh.add_vertex(MyMesh::Point( 1, -1,  1));
        vhandle[2] = mesh.add_vertex(MyMesh::Point( 1,  1,  1));
        vhandle[3] = mesh.add_vertex(MyMesh::Point(-1,  1,  1));
        std::vector<MyMesh::VertexHandle>  face_vhandles;
        face_vhandles.clear();
        face_vhandles.push_back(vhandle[0]);
        face_vhandles.push_back(vhandle[1]);
        face_vhandles.push_back(vhandle[2]);
        face_vhandles.push_back(vhandle[3]);
        mesh.add_face(face_vhandles);
        try
        {
        if ( !OpenMesh::IO::write_mesh(mesh, "triangle.off") )
        {
            std::cerr << "Cannot write mesh to file 'triangle.off'" << std::endl;
            return 1;
        }
        }
        catch( std::exception& x )
        {
        std::cerr << x.what() << std::endl;
        return 1;
        }
        return 0;
    }

    EOS
    flags = %W[
      -I#{include}
      -L#{lib}
      -lOpenMeshCore
      -lOpenMeshTools
    ]
    system ENV.cxx, "test.cpp", "-o", "test", *flags
    system "./test"
  end
end