Function extract_data

tools/Boolean/Carve/CarveEngine.cpp:58–84

    }

    void extract_data(CarveMeshPtr mesh, MatrixFr& vertices, MatrixIr& faces) {
        typedef CarveMesh::vertex_t CarveVertex;
        const size_t num_vertices = mesh->vertex_storage.size();
        vertices.resize(num_vertices, 3);
        for (size_t i=0; i<num_vertices; i++) {
            const auto& v = mesh->vertex_storage[i];
            vertices(i,0) = v.v.x;
            vertices(i,1) = v.v.y;
            vertices(i,2) = v.v.z;
        }

        const size_t num_faces = mesh->faceEnd() - mesh->faceBegin();
        faces.resize(num_faces, 3);
        for (auto itr=mesh->faceBegin(); itr != mesh->faceEnd(); itr++) {
            std::vector<CarveVertex* > vts;
            (*itr)->getVertices(vts);
            assert(vts.size() == 3);

            // WARNING:
            // Here is my guess on how to extract vertex index.
            // Carve's documentation is not clear on how to do this.  
            const size_t fid = itr - mesh->faceBegin();
            faces(fid, 0) = vts[0] - &mesh->vertex_storage[0];
            faces(fid, 1) = vts[1] - &mesh->vertex_storage[0];
            faces(fid, 2) = vts[2] - &mesh->vertex_storage[0];
        }
    }
}
using namespace CarveEngineHelper;