+void LocateResourceGoal::SearchVicinity() {
+ const world::Planet &planet = GetSituation().GetPlanet();
+ int srf = GetSituation().Surface();
+ const glm::dvec3 &pos = GetSituation().Position();
+
+ glm::ivec2 loc = planet.SurfacePosition(srf, pos);
+ glm::ivec2 seek_radius(2);
+ glm::ivec2 begin(glm::max(glm::ivec2(0), loc - seek_radius));
+ glm::ivec2 end(glm::min(glm::ivec2(planet.SideLength() - 1), loc + seek_radius));
+
+ const world::TileType::Yield *best = nullptr;
+ glm::ivec2 best_pos;
+ double best_distance;
+
+ for (int y = begin.y; y <= end.y; ++y) {
+ for (int x = begin.x; x <= end.x; ++x) {
+ const world::TileType &type = planet.TypeAt(srf, x, y);
+ auto yield = type.FindResource(res);
+ if (yield != type.resources.cend()) {
+ double dist = glm::length2(planet.TileCenter(srf, x, y) - pos);
+ if (!best) {
+ best = &*yield;
+ best_pos = glm::ivec2(x, y);
+ best_distance = dist;
+ } else if (yield->ubiquity - (dist * 0.125) > best->ubiquity - (best_distance * 0.125)) {
+ best = &*yield;
+ best_pos = glm::ivec2(x, y);
+ best_distance = dist;
+ }
+ }
+ }
+ }
+ if (best) {
+ found = true;
+ searching = false;
+ target_pos = planet.TileCenter(srf, best_pos.x, best_pos.y);
+ target_srf = srf;
+ target_tile = best_pos;
+ GetSteering().GoTo(target_pos);
+ } else if (!searching) {
+ found = false;
+ searching = true;
+ target_pos = GetSituation().Position();
+ target_pos[(srf + 0) % 3] += Assets().random.SNorm();
+ target_pos[(srf + 1) % 3] += Assets().random.SNorm();
+ GetSteering().GoTo(target_pos);
+ }
+}
+
+bool LocateResourceGoal::OnTargetTile() const noexcept {
+ const Situation &s = GetSituation();
+ return s.OnSurface()
+ && s.Surface() == target_srf
+ && s.OnTile()
+ && s.SurfacePosition() == target_tile;
+}
+