diff options
| -rw-r--r-- | src/Generating/Prefab.cpp | 43 |
1 files changed, 42 insertions, 1 deletions
diff --git a/src/Generating/Prefab.cpp b/src/Generating/Prefab.cpp index 69bea69e8..7d1762036 100644 --- a/src/Generating/Prefab.cpp +++ b/src/Generating/Prefab.cpp @@ -158,12 +158,53 @@ cPrefab::cPrefab(const cPrefab::sDef & a_Def) : void cPrefab::Draw(cChunkDesc & a_Dest, const cPlacedPiece * a_Placement) const { + // Draw the basic image: Vector3i Placement = a_Placement->GetCoords(); int ChunkStartX = a_Dest.GetChunkX() * cChunkDef::Width; int ChunkStartZ = a_Dest.GetChunkZ() * cChunkDef::Width; Placement.Move(-ChunkStartX, 0, -ChunkStartZ); - a_Dest.WriteBlockArea(m_BlockArea[a_Placement->GetNumCCWRotations()], Placement.x, Placement.y, Placement.z, m_MergeStrategy); + const cBlockArea & Image = m_BlockArea[a_Placement->GetNumCCWRotations()]; + a_Dest.WriteBlockArea(Image, Placement.x, Placement.y, Placement.z, m_MergeStrategy); + // If requested, draw the floor (from the bottom of the prefab down to the nearest non-air) + int MaxX = Image.GetSizeX(); + int MaxZ = Image.GetSizeZ(); + for (int z = 0; z < MaxZ; z++) + { + int RelZ = Placement.z + z; + if ((RelZ < 0) || (RelZ >= cChunkDef::Width)) + { + // Z coord outside the chunk + continue; + } + for (int x = 0; x < MaxX; x++) + { + int RelX = Placement.x + x; + if ((RelX < 0) || (RelX >= cChunkDef::Width)) + { + // X coord outside the chunk + continue; + } + BLOCKTYPE BlockType; + NIBBLETYPE BlockMeta; + Image.GetRelBlockTypeMeta(x, 0, z, BlockType, BlockMeta); + if ((BlockType == E_BLOCK_AIR) || (BlockType == E_BLOCK_SPONGE)) + { + // Do not expand air nor sponge blocks + continue; + } + for (int y = Placement.y - 1; y >= 0; y--) + { + BLOCKTYPE ExistingBlock = a_Dest.GetBlockType(RelX, y, RelZ); + if (ExistingBlock != E_BLOCK_AIR) + { + // End the expansion for this column, reached the end + break; + } + a_Dest.SetBlockTypeMeta(RelX, y, RelZ, BlockType, BlockMeta); + } // for y + } // for x + } // for z } |