diff options
Diffstat (limited to 'src/mapgen.cpp')
-rw-r--r-- | src/mapgen.cpp | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/src/mapgen.cpp b/src/mapgen.cpp index 7b32ffab1..f73e16dd0 100644 --- a/src/mapgen.cpp +++ b/src/mapgen.cpp @@ -299,6 +299,41 @@ void Mapgen::updateHeightmap(v3s16 nmin, v3s16 nmax) } } + +void Mapgen::getSurfaces(v2s16 p2d, s16 ymin, s16 ymax, + s16 *floors, s16 *ceilings, u16 *num_floors, u16 *num_ceilings) +{ + u16 floor_i = 0; + u16 ceiling_i = 0; + const v3s16 &em = vm->m_area.getExtent(); + + bool is_walkable = false; + u32 vi = vm->m_area.index(p2d.X, ymax, p2d.Y); + MapNode mn_max = vm->m_data[vi]; + bool walkable_above = ndef->get(mn_max).walkable; + vm->m_area.add_y(em, vi, -1); + + for (s16 y = ymax - 1; y >= ymin; y--) { + MapNode mn = vm->m_data[vi]; + is_walkable = ndef->get(mn).walkable; + + if (is_walkable && !walkable_above) { + floors[floor_i] = y; + floor_i++; + } else if (!is_walkable && walkable_above) { + ceilings[ceiling_i] = y + 1; + ceiling_i++; + } + + vm->m_area.add_y(em, vi, -1); + walkable_above = is_walkable; + } + + *num_floors = floor_i; + *num_ceilings = ceiling_i; +} + + inline bool Mapgen::isLiquidHorizontallyFlowable(u32 vi, v3s16 em) { u32 vi_neg_x = vi; |