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);
}
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);
}
}