Example #1
0
static void
sp_path_convert_to_guides(SPItem *item)
{
    SPPath *path = SP_PATH(item);

    if (!path->_curve) {
        return;
    }

    std::list<std::pair<Geom::Point, Geom::Point> > pts;

    Geom::Affine const i2dt(path->i2dt_affine());

    Geom::PathVector const & pv = path->_curve->get_pathvector();
    for(Geom::PathVector::const_iterator pit = pv.begin(); pit != pv.end(); ++pit) {
        for(Geom::Path::const_iterator cit = pit->begin(); cit != pit->end_default(); ++cit) {
            // only add curves for straight line segments
            if( is_straight_curve(*cit) )
            {
                pts.push_back(std::make_pair(cit->initialPoint() * i2dt, cit->finalPoint() * i2dt));
            }
        }
    }

    sp_guide_pt_pairs_to_guides(item->document, pts);
}
Example #2
0
/*
 * sp_svg_write_polygon: Write points attribute for polygon tag.
 * pathv may only contain paths with only straight line segments
 * Return value: points attribute string.
 */
static gchar *sp_svg_write_polygon(Geom::PathVector const & pathv)
{
    Inkscape::SVGOStringStream os;

    for (Geom::PathVector::const_iterator pit = pathv.begin(); pit != pathv.end(); ++pit) {
        for (Geom::Path::const_iterator cit = pit->begin(); cit != pit->end_default(); ++cit) {
            if ( is_straight_curve(*cit) )
            {
                os << cit->finalPoint()[0] << "," << cit->finalPoint()[1] << " ";
            } else {
                g_error("sp_svg_write_polygon: polygon path contains non-straight line segments");
            }
        }
    }

    return g_strdup(os.str().c_str());
}
Example #3
0
/* Calculates...
   and returns ... in *wind and the distance to ... in *dist.
   Returns bounding box in *bbox if bbox!=NULL.
 */
void
pathv_matrix_point_bbox_wind_distance (Geom::PathVector const & pathv, Geom::Affine const &m, Geom::Point const &pt,
                         Geom::Rect *bbox, int *wind, Geom::Coord *dist,
                         Geom::Coord tolerance, Geom::Rect const *viewbox)
{
    if (pathv.empty()) {
        if (wind) *wind = 0;
        if (dist) *dist = Geom::infinity();
        return;
    }

    // remember last point of last curve
    Geom::Point p0(0,0);

    // remembering the start of subpath
    Geom::Point p_start(0,0);
    bool start_set = false;

    for (Geom::PathVector::const_iterator it = pathv.begin(); it != pathv.end(); ++it) {

        if (start_set) { // this is a new subpath
            if (wind && (p0 != p_start)) // for correct fill picking, each subpath must be closed
                geom_line_wind_distance (p0[X], p0[Y], p_start[X], p_start[Y], pt, wind, dist);
        }
        p0 = it->initialPoint() * m;
        p_start = p0;
        start_set = true;
        if (bbox) {
            bbox->expandTo(p0);
        }

        // loop including closing segment if path is closed
        for (Geom::Path::const_iterator cit = it->begin(); cit != it->end_default(); ++cit) {
            geom_curve_bbox_wind_distance(*cit, m, pt, bbox, wind, dist, tolerance, viewbox, p0);
        }
    }

    if (start_set) { 
        if (wind && (p0 != p_start)) // for correct picking, each subpath must be closed
            geom_line_wind_distance (p0[X], p0[Y], p_start[X], p_start[Y], pt, wind, dist);
    }
}