Added PieceStructures generator.

src/Generating/PrefabStructure.cpp

@@ -0,0 +1,74 @@
+
+// PrefabStructure.cpp
+
+// Implements the cPrefabStructure class representing a cGridStructGen::cStructure descendant based on placed cPrefab instances
+
+#include "Globals.h"
+#include "PrefabStructure.h"
+#include "Prefab.h"
+
+
+
+
+
+cPrefabStructure::cPrefabStructure(
+	int a_GridX, int a_GridZ,
+	int a_OriginX, int a_OriginZ,
+	cPlacedPieces & a_Pieces,
+	cTerrainHeightGenPtr a_HeightGen
+):
+	Super(a_GridX, a_GridZ, a_OriginX, a_OriginZ),
+	m_Pieces(a_Pieces),
+	m_HeightGen(a_HeightGen)
+{
+}
+
+
+
+
+
+cPrefabStructure::~cPrefabStructure()
+{
+	cPieceGenerator::FreePieces(m_Pieces);
+}
+
+
+
+
+
+void cPrefabStructure::DrawIntoChunk(cChunkDesc & a_Chunk)
+{
+	// Iterate over all items
+	// Each intersecting prefab is placed on ground, if requested, then drawn
+	for (cPlacedPieces::iterator itr = m_Pieces.begin(), end = m_Pieces.end(); itr != end; ++itr)
+	{
+		const cPrefab & Prefab = static_cast<const cPrefab &>((*itr)->GetPiece());
+		if (Prefab.ShouldMoveToGround() && !(*itr)->HasBeenMovedToGround())
+		{
+			PlacePieceOnGround(**itr);
+		}
+		Prefab.Draw(a_Chunk, *itr);
+	}  // for itr - m_PlacedPieces[]
+}
+
+
+
+
+
+void cPrefabStructure::PlacePieceOnGround(cPlacedPiece & a_Piece)
+{
+	cPiece::cConnector FirstConnector = a_Piece.GetRotatedConnector(0);
+	int ChunkX, ChunkZ;
+	int BlockX = FirstConnector.m_Pos.x;
+	int BlockZ = FirstConnector.m_Pos.z;
+	int BlockY;
+	cChunkDef::AbsoluteToRelative(BlockX, BlockY, BlockZ, ChunkX, ChunkZ);
+	cChunkDef::HeightMap HeightMap;
+	m_HeightGen->GenHeightMap(ChunkX, ChunkZ, HeightMap);
+	int TerrainHeight = cChunkDef::GetHeight(HeightMap, BlockX, BlockZ);
+	a_Piece.MoveToGroundBy(TerrainHeight - FirstConnector.m_Pos.y + 1);
+}
+
+
+
+