+#ifdef PATH_FIND_DEBUG
+void
+path_find_visualize(coord sx, coord sy, coord dx, coord dy)
+{
+ int uid;
+ int xmin, xmax, ymin, ymax, x, y, odd, ch;
+ double c, u, cost;
+ char buf[1024];
+
+ assert(pf_cost(XYOFFSET(sx, sy)) == 0.0);
+ c = pf_cost(XYOFFSET(dx, dy));
+ u = c / 10.0;
+
+ /* find bounding box */
+ xmin = xmax = 0;
+ ymin = ymax = 0;
+ for (y = -WORLD_Y / 2; y < WORLD_Y / 2; y++) {
+ odd = ((sx + -WORLD_X / 2) ^ (sy + y)) & 1;
+ for (x = -WORLD_X / 2 + odd; x < WORLD_X / 2; x += 2) {
+ uid = XYOFFSET(XNORM(sx + x), YNORM(sy + y));
+ if (pf_is_unvisited(uid))
+ continue;
+ if (xmin > x)
+ xmin = x;
+ if (xmax < x)
+ xmax = x;
+ if (ymin > y)
+ ymin = y;
+ if (ymax < y)
+ ymax = y;
+ }
+ }
+ printf("bbox %d:%d,%d:%d origin %d,%d\n",
+ xmin, xmax, ymin, ymax, sx, sy);
+
+ for (y = ymin; y <= ymax; y++) {
+ odd = ((sx + xmin) ^ (sy + y)) & 1;
+ if (odd)
+ printf(" ");
+ for (x = xmin + odd; x <= xmax; x += 2) {
+ uid = XYOFFSET(XNORM(sx + x), YNORM(sy + y));
+ if (pf_is_unvisited(uid))
+ ch = ' ';
+ else if (uid == XYOFFSET(dx, dy))
+ ch = 'D';
+ else if (uid == XYOFFSET(sx, sy))
+ ch = 'S';
+ else {
+ cost = pf_cost(uid);
+ ch = cost > c ? '+' : '0' + (int)(10 * (cost / c));
+ }
+ printf(" %c", ch);
+ }
+ printf("\n");
+ }
+ path_find_route(buf, sizeof(buf), sx, sy, dx, dy);
+ printf("%s %g\n", buf, pf_cost(XYOFFSET(dx, dy)));
+}
+#endif
+