Esempio n. 1
0
void TreeNode::draw() const
{
  std::ofstream ofs(NODE_FILENAME);
  cairo_t *cr;
  cairo_surface_t *surface;
  CGAL::Bbox_2 bbox = region.bbox();

  assert(bbox.xmin() >= 0.0);
  assert(bbox.ymin() >= 0.0);

#ifdef PDF_OUTPUT
  surface = cairo_pdf_surface_create(IMG_FILENAME, bbox.xmax(), bbox.ymax());
#endif
#ifdef PNG_OUTPUT
  surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, bbox.xmax(), bbox.ymax());
#endif
  cr = cairo_create(surface);

  cairo_select_font_face(cr, "serif", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_BOLD);
  cairo_set_font_size(cr, 10.0);

  draw_region(cr);
  draw_text(cr);
  write_centroid(ofs);

  cairo_show_page(cr);
  cairo_destroy(cr);
#ifdef PNG_OUTPUT
  cairo_surface_write_to_png(surface, IMG_FILENAME);
#endif
  cairo_surface_destroy(surface);
}
Esempio n. 2
0
void TreeNode::draw_region(cairo_t *cr) const {
  if (region.size() >= 3) {
    if (this->name) {
      Polygon_2::Vertex_circulator vcir, vend;
      vcir = vend = region.vertices_circulator();
      Bbox_2 bbox = region.bbox();

      cairo_pattern_t *fill =
        cairo_pattern_create_linear(bbox.xmin(), bbox.ymin(),
                                    bbox.xmax(), bbox.ymax());
      cairo_pattern_add_color_stop_rgb(fill, 0.0, 1.0, 1.0, 1.0);

      /* L*a*b* 色空間
      {
        double r, g, b;
        cl2pix(&r, &g, &b,
          dsfmt_genrand_open_open(&dsfmt),
          dsfmt_genrand_open_open(&dsfmt));
        cairo_pattern_add_color_stop_rgb(fill, 1.0, r, g, b);
      }
      */
      // 単なるRGB
      cairo_pattern_add_color_stop_rgb(fill, 1.0,
        dsfmt_genrand_open_open(&dsfmt),
        dsfmt_genrand_open_open(&dsfmt),
        dsfmt_genrand_open_open(&dsfmt));

      cairo_move_to(cr, CGAL::to_double(vcir->x()), CGAL::to_double(vcir->y()));
      ++vcir;

      do {
        cairo_line_to(cr, CGAL::to_double(vcir->x()), CGAL::to_double(vcir->y()));
        ++vcir;
      } while (vcir != vend);
      cairo_line_to(cr, CGAL::to_double(vend->x()), CGAL::to_double(vend->y()));
      cairo_set_source(cr, fill);
      cairo_fill_preserve(cr);
      cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
      cairo_stroke(cr);
      cairo_pattern_destroy(fill);
    }
  }

  std::list<TreeNode>::const_iterator tit;
  for (tit = children.begin(); tit != children.end(); ++tit) {
    tit->draw_region(cr);
  }
}