// HeightMap.cpp
// Implements the cHeightMap class representing a cCallback descendant that draws a B&W map of heights for the world
#include "Globals.h"
#include "HeightMap.h"
static const unsigned char g_BMPHeader[] =
{
0x42, 0x4D, 0x36, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x36, 0x00, 0x00, 0x00, 0x28, 0x00,
0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0xfe, 0xff, 0xff, 0x01, 0x00, 0x20, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x13, 0x0B, 0x00, 0x00, 0x13, 0x0B, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00
} ;
cHeightMap::cHeightMap(void) :
m_CurrentRegionX(0),
m_CurrentRegionZ(0),
m_IsCurrentRegionValid(false)
{
}
void cHeightMap::Finish(void)
{
if (m_IsCurrentRegionValid)
{
StartNewRegion(0, 0);
}
}
bool cHeightMap::OnNewChunk(int a_ChunkX, int a_ChunkZ)
{
int RegionX = (a_ChunkX < 0) ? (a_ChunkX - 31) / 32 : a_ChunkX / 32;
int RegionZ = (a_ChunkZ < 0) ? (a_ChunkZ - 31) / 32 : a_ChunkZ / 32;
if ((RegionX != m_CurrentRegionX) || (RegionZ != m_CurrentRegionZ))
{
if (m_IsCurrentRegionValid)
{
StartNewRegion(RegionX, RegionZ);
}
m_CurrentRegionX = RegionX;
m_CurrentRegionZ = RegionZ;
}
m_IsCurrentRegionValid = true;
m_CurrentChunkX = a_ChunkX;
m_CurrentChunkZ = a_ChunkZ;
m_CurrentChunkOffX = m_CurrentChunkX - m_CurrentRegionX * 32;
m_CurrentChunkOffZ = m_CurrentChunkZ - m_CurrentRegionZ * 32;
memset(m_BlockTypes, 0, sizeof(m_BlockTypes));
return false;
}
bool cHeightMap::OnHeightMap(const int * a_HeightMapBE)
{
ASSERT(m_CurrentChunkOffX >= 0);
ASSERT(m_CurrentChunkOffX < 32);
ASSERT(m_CurrentChunkOffZ >= 0);
ASSERT(m_CurrentChunkOffZ < 32);
int * BaseHeight = m_Height + m_CurrentChunkOffZ * 16 * 512 + m_CurrentChunkOffX * 16;
for (int z = 0; z < 16; z++)
{
int * Row = BaseHeight + z * 512;
for (int x = 0; x < 16; x++)
{
Row[x] = ntohl(a_HeightMapBE[z * 16 + x]);
}
} // for z
return false; // Still want blockdata to remove trees from the heightmap
}
bool cHeightMap::OnSection(
unsigned char a_Y,
const BLOCKTYPE * a_BlockTypes,
const NIBBLETYPE * a_BlockAdditional,
const NIBBLETYPE * a_BlockMeta,
const NIBBLETYPE * a_BlockLight,
const NIBBLETYPE * a_BlockSkyLight
)
{
// Copy the section data into the appropriate place in the internal buffer
memcpy(m_BlockTypes + a_Y * 16 * 16 * 16, a_BlockTypes, 16 * 16 * 16);
return false;
}
bool cHeightMap::OnSectionsFinished(void)
{
// Remove trees from the heightmap:
for (int z = 0; z < 16; z++)
{
for (int x = 0; x < 16; x++)
{
for (int y = m_Height[512 * (16 * m_CurrentChunkOffZ + z) + 16 * m_CurrentChunkOffX + x]; y >= 0; y--)
{
if (IsGround(m_BlockTypes[256 * y + 16 * z + x]))
{
m_Height[512 * (16 * m_CurrentChunkOffZ + z) + 16 * m_CurrentChunkOffX + x] = y;
break; // for y
}
} // for y
} // for x
} // for z
return true;
}
void cHeightMap::StartNewRegion(int a_RegionX, int a_RegionZ)
{
AString FileName;
Printf(FileName, "Height.%d.%d.bmp", m_CurrentRegionX, m_CurrentRegionZ);
cFile f;
if (!f.Open(FileName, cFile::fmWrite))
{
LOG("Cannot open file \"%s\" for writing the height map. Data for this region lost.", FileName.c_str());
}
else
{
f.Write(g_BMPHeader, sizeof(g_BMPHeader));
for (int z = 0; z < 512; z++)
{
int RowData[512];
int * HeightRow = m_Height + z * 512;
for (int x = 0; x < 512; x++)
{
RowData[x] = std::max(std::min(HeightRow[x], 255), 0) * 0x010101;
}
f.Write(RowData, sizeof(RowData));
} // for z
}
memset(m_Height, 0, sizeof(m_Height));
m_CurrentRegionX = a_RegionX;
m_CurrentRegionZ = a_RegionZ;
}
bool cHeightMap::IsGround(BLOCKTYPE a_BlockType)
{
// Name all blocks that are NOT ground, return false for them:
switch (a_BlockType)
{
case E_BLOCK_AIR:
case E_BLOCK_BED:
case E_BLOCK_BREWING_STAND:
case E_BLOCK_BROWN_MUSHROOM:
case E_BLOCK_CACTUS:
case E_BLOCK_CAKE:
case E_BLOCK_CARROTS:
case E_BLOCK_CAULDRON:
case E_BLOCK_CHEST:
case E_BLOCK_COBBLESTONE_WALL:
case E_BLOCK_COBWEB:
case E_BLOCK_COCOA_POD:
case E_BLOCK_CROPS:
case E_BLOCK_DEAD_BUSH:
case E_BLOCK_DETECTOR_RAIL:
case E_BLOCK_DIRT:
case E_BLOCK_DRAGON_EGG:
case E_BLOCK_END_PORTAL:
case E_BLOCK_ENDER_CHEST:
case E_BLOCK_FENCE:
case E_BLOCK_FENCE_GATE:
case E_BLOCK_FIRE:
case E_BLOCK_FLOWER_POT:
case E_BLOCK_HEAD:
case E_BLOCK_IRON_BARS:
case E_BLOCK_LADDER:
case E_BLOCK_LAVA:
case E_BLOCK_LEAVES:
case E_BLOCK_LEVER:
case E_BLOCK_LILY_PAD:
case E_BLOCK_LOG: // NOTE: This block is actually solid, but we don't want it because it's the thing that trees are made of, and we're getting rid of trees
case E_BLOCK_MELON:
case E_BLOCK_MELON_STEM:
case E_BLOCK_NETHER_BRICK_FENCE:
case E_BLOCK_NETHER_PORTAL:
case E_BLOCK_POWERED_RAIL:
case E_BLOCK_PUMPKIN:
case E_BLOCK_PUMPKIN_STEM:
case E_BLOCK_RAIL:
case E_BLOCK_RED_ROSE:
case E_BLOCK_RED_MUSHROOM:
case E_BLOCK_REDSTONE_REPEATER_OFF:
case E_BLOCK_REDSTONE_REPEATER_ON:
case E_BLOCK_REDSTONE_TORCH_OFF:
case E_BLOCK_REDSTONE_TORCH_ON:
case E_BLOCK_REDSTONE_WIRE:
case E_BLOCK_REEDS:
case E_BLOCK_SAPLING:
case E_BLOCK_SIGN_POST:
case E_BLOCK_SNOW:
case E_BLOCK_STATIONARY_LAVA:
case E_BLOCK_STATIONARY_WATER:
case E_BLOCK_STONE_BUTTON:
case E_BLOCK_STONE_PRESSURE_PLATE:
case E_BLOCK_TALL_GRASS:
case E_BLOCK_TORCH:
case E_BLOCK_TRIPWIRE:
case E_BLOCK_TRIPWIRE_HOOK:
case E_BLOCK_VINES:
case E_BLOCK_WALLSIGN:
case E_BLOCK_WATER:
case E_BLOCK_WOODEN_BUTTON:
case E_BLOCK_WOODEN_PRESSURE_PLATE:
case E_BLOCK_YELLOW_FLOWER:
{
return false;
}
}
return true;
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// cHeightMapFactory:
cHeightMapFactory::~cHeightMapFactory()
{
// Force all threads to save their last regions:
for (cCallbacks::iterator itr = m_Callbacks.begin(), end = m_Callbacks.end(); itr != end; ++itr)
{
((cHeightMap *)(*itr))->Finish();
}
// TODO: Join all the files into one giant image file
}
