Method parse

tools/Wires/WireNetwork/SVGParser.cpp:36–76

}

void SVGParser::parse(const std::string& filename, bool keep_bbox) {
    NSVGimage* image = nsvgParseFromFile(filename.c_str(), "px", 96);
    if (!image) {
        throw IOError("Error: " + filename + " does not exist.");
    }
    const auto width = image->width;
    const auto height = image->height;

    if (keep_bbox) { add_bbox(width, height); }

    for (auto shape = image->shapes; shape != NULL; shape=shape->next) {
        for (auto path = shape->paths; path != NULL; path=path->next) {
            const int v_first = m_vertices.size();
            for (size_t i=0; i<path->npts-1; i+=3) {
                float* p = &path->pts[i*2];
                // SVG's coordinate system is left handed.
                const Vector2F p0{p[0], -p[1]};
                const Vector2F p1{p[2], -p[3]};
                const Vector2F p2{p[4], -p[5]};
                const Vector2F p3{p[6], -p[7]};
                assert(p0.array().isFinite().all());
                assert(p3.array().isFinite().all());
                if (!std::isfinite(p1[0]) || !std::isfinite(p1[1]) ||
                    !std::isfinite(p2[0]) || !std::isfinite(p2[1])) {
                    add_line_segment(p0, p3, i!=0);
                } else {
                    const auto tol = (
                            (p1-p0).norm() +
                            (p2-p1).norm() +
                            (p3-p2).norm()) * 1e-3;
                    add_bezier_curve(p0, p1, p2, p3, tol, 0, i!=0);
                }
            }
            const int v_last = m_vertices.size()-1;
            if (path->closed) {
                m_edges.emplace_back(v_last, v_first);
            }
        }
    }
    nsvgDelete(image);
}


void SVGParser::add_bbox(Float width, Float height) {