PrefabStructure.cpp

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// 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,
    cTerrainHeightGen & a_HeightGen
):
    Super(a_GridX, a_GridZ, a_OriginX, a_OriginZ),
    m_Pieces(std::move(a_Pieces)),
    m_HeightGen(a_HeightGen)
{
}
 
 
 
 
 
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->get());
    }  // 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);
}