diff options
| -rw-r--r-- | crawl-ref/source/dgn-shoals.cc | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/crawl-ref/source/dgn-shoals.cc b/crawl-ref/source/dgn-shoals.cc index f3b7e386fd..1f7485dd5b 100644 --- a/crawl-ref/source/dgn-shoals.cc +++ b/crawl-ref/source/dgn-shoals.cc @@ -216,6 +216,71 @@ static void _shoals_apply_level() grd(*ri) = _shoals_feature_at(*ri); } +static bool _has_adjacent_feat(coord_def c, dungeon_feature_type feat) +{ + for (adjacent_iterator ai(c); ai; ++ai) + if (grd(*ai) == feat) + return true; + return false; +} + +// Returns all points in deep water with an adjacent square in shallow water. +static std::vector<coord_def> _shoals_water_depth_change_points() +{ + std::vector<coord_def> points; + for (rectangle_iterator ri(1); ri; ++ri) + { + coord_def c(*ri); + if (grd(c) == DNGN_DEEP_WATER + && _has_adjacent_feat(c, DNGN_SHALLOW_WATER)) + points.push_back(c); + } + return points; +} + +static inline void _shoals_deepen_water_at(coord_def p, int distance) +{ + shoals_heights(p) -= distance * 5; +} + +static void _shoals_deepen_water() +{ + std::vector<coord_def> pages[2]; + int current_page = 0; + pages[current_page] = _shoals_water_depth_change_points(); + FixedArray<bool, GXM, GYM> seen_points(false); + + for (int i = 0, size = pages[current_page].size(); i < size; ++i) + seen_points(pages[current_page][i]) = true; + + int distance = 0; + while (!pages[current_page].empty()) + { + const int next_page = !current_page; + std::vector<coord_def> &cpage(pages[current_page]); + std::vector<coord_def> &npage(pages[next_page]); + for (int i = 0, size = cpage.size(); i < size; ++i) + { + coord_def c(cpage[i]); + if (distance) + _shoals_deepen_water_at(c, distance); + + for (adjacent_iterator ai(c); ai; ++ai) + { + coord_def adj(*ai); + if (!seen_points(adj) && grd(adj) == DNGN_DEEP_WATER) + { + npage.push_back(adj); + seen_points(adj) = true; + } + } + } + cpage.clear(); + current_page = next_page; + distance++; + } +} + static coord_def _pick_shoals_island() { const int lucky_island = random2(_shoals_islands.size()); @@ -316,5 +381,6 @@ void prepare_shoals(int level_number) _shoals_cliffs(); _shoals_smooth(); _shoals_apply_level(); + _shoals_deepen_water(); _shoals_furniture(_shoals_margin); } |