diff options
Diffstat (limited to 'src/mapgen_fractal.cpp')
| -rw-r--r-- | src/mapgen_fractal.cpp | 27 |
1 files changed, 19 insertions, 8 deletions
diff --git a/src/mapgen_fractal.cpp b/src/mapgen_fractal.cpp index 9cb682a91..8a5c1e2bc 100644 --- a/src/mapgen_fractal.cpp +++ b/src/mapgen_fractal.cpp @@ -209,17 +209,28 @@ void MapgenFractalParams::writeParams(Settings *settings) const ///////////////////////////////////////////////////////////////// -int MapgenFractal::getGroundLevelAtPoint(v2s16 p) +int MapgenFractal::getSpawnLevelAtPoint(v2s16 p) { - s16 search_start = 128; - s16 search_end = -128; - - for (s16 y = search_start; y >= search_end; y--) { - if (getFractalAtPoint(p.X, y, p.Y)) - return y; + bool solid_below = false; // Dry solid node is present below to spawn on + u8 air_count = 0; // Consecutive air nodes above the dry solid node + s16 seabed_level = NoisePerlin2D(&noise_seabed->np, p.X, p.Y, seed); + // Seabed can rise above water_level or might be raised to create dry land + s16 search_start = MYMAX(seabed_level, water_level + 1); + if (seabed_level > water_level) + solid_below = true; + + for (s16 y = search_start; y <= search_start + 128; y++) { + if (getFractalAtPoint(p.X, y, p.Y)) { // Fractal node + solid_below = true; + air_count = 0; + } else if (solid_below) { // Air above solid node + air_count++; + if (air_count == 2) + return y - 2; + } } - return -MAX_MAP_GENERATION_LIMIT; + return MAX_MAP_GENERATION_LIMIT; // Unsuitable spawn point } |