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worldloader.cpp
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#include "worldloader.h"
#include "helper.h"
#include "filesystem.h"
#include "nbt.h"
#include "colors.h"
#include "globals.h"
#include <list>
#include <map>
#include <cstring>
#include <string>
#include <cstdio>
#include <zlib.h>
#define CHUNKS_PER_BIOME_FILE 32
#define REGIONSIZE 32
using std::string;
namespace
{
// This will hold all chunks (<1.3) or region files (>=1.3) discovered while scanning world dir
struct Chunk {
int x;
int z;
char *filename;
Chunk(const char *source, const int sx, const int sz) {
filename = strdup(source);
x = sx;
z = sz;
}
~Chunk() {
free(filename);
}
};
struct Point {
int x;
int z;
Point(const int sx, const int sz) {
x = sx;
z = sz;
}
};
typedef std::list<char *> charList; // List that holds C-Strings
typedef std::list<Chunk *> chunkList; // List that holds Chunk structs (see above)
typedef std::list<Point *> pointList; // List that holds Point structs (see above)
typedef std::map<uint32_t, uint32_t> chunkMap;
size_t lightsize; // Size of lightmap
chunkList chunks; // list of all chunks/regions of a world
pointList points; // all existing chunk X|Z found in region files
// network byte order to host byte order (32 bit, reads from 8 bit stream/array)
inline uint32_t _ntohl(uint8_t *val)
{
return (uint32_t(val[0]) << 24)
+ (uint32_t(val[1]) << 16)
+ (uint32_t(val[2]) << 8)
+ (uint32_t(val[3]));
}
}
static bool loadChunk(const char *streamOrFile, const size_t len = 0);
static bool loadAnvilChunk(NBT_Tag * const level, const int32_t chunkX, const int32_t chunkZ);
static void allocateTerrain();
static void loadBiomeChunk(const char* path, const int chunkX, const int chunkZ);
static bool loadAllRegions();
static bool loadRegion(const char* file, const bool mustExist, int &loadedChunks);
static bool loadTerrainRegion(const char *fromPath, int &loadedChunks);
static bool scanWorldDirectoryRegion(const char *fromPath);
static inline void assignBlock(const uint8_t &source, uint8_t* &dest, int &x, int &y, int &z, uint8_t* &justData);
static inline void lightCave(const int x, const int y, const int z);
int getWorldFormat(const char *worldPath)
{
int format = 0; // alpha (single chunk files)
size_t len = strlen(worldPath);
char *path = new char[len + 40];
memcpy(path, worldPath, len);
memcpy(path + len, "/region", 8);
myFile file;
DIRHANDLE sd = Dir::open(path, file);
if (sd != NULL) {
do { // Here we finally arrived at the region files
if (strcmp(".mca", RIGHTSTRING(file.name, 4)) == 0) {
format = 2;
break;
} else if (format != 1 && strcmp(".mcr", RIGHTSTRING(file.name, 4)) == 0) {
format = 1;
}
} while (Dir::next(sd, path, file));
Dir::close(sd);
}
return format;
}
bool scanWorldDirectory(const char *fromPath)
{
if (g_WorldFormat != 0) return scanWorldDirectoryRegion(fromPath);
charList subdirs;
myFile file;
DIRHANDLE d = Dir::open((char *)fromPath, file);
if (d == NULL) {
return false;
}
do {
if (file.isdir && strcmp(file.name + strlen(file.name) - 3, "/..") != 0 && strcmp(file.name + strlen(file.name) - 2, "/.") != 0) {
char *s = strdup(file.name);
subdirs.push_back(s);
}
} while (Dir::next(d, (char *)fromPath, file));
Dir::close(d);
if (subdirs.empty()) {
return false;
}
// OK go
for (chunkList::iterator it = chunks.begin(); it != chunks.end(); it++) {
delete *it;
}
chunks.clear();
g_FromChunkX = g_FromChunkZ = 10000000;
g_ToChunkX = g_ToChunkZ = -10000000;
// Read subdirs now
string base(fromPath);
base.append("/");
const size_t max = subdirs.size();
size_t count = 0;
printf("Scanning world...\n");
for (charList::iterator it = subdirs.begin(); it != subdirs.end(); it++) {
string base2 = base + *it;
printProgress(count++, max);
d = Dir::open((char *)base2.c_str(), file);
if (d == NULL) {
continue;
}
do {
if (file.isdir) {
// Scan inside scan
myFile chunk;
string path = base2 + "/" + file.name;
DIRHANDLE sd = Dir::open((char *)path.c_str(), chunk);
if (sd != NULL) {
do { // Here we finally arrived at the chunk files
if (!chunk.isdir && chunk.name[0] == 'c' && chunk.name[1] == '.') { // Make sure filename is a chunk
char *s = chunk.name;
// Extract x coordinate from chunk filename
s += 2;
int valX = base10(s);
// Extract z coordinate from chunk filename
while (*s != '.' && *s != '\0') {
++s;
}
int valZ = base10(s+1);
if (valX > -4000 && valX < 4000 && valZ > -4000 && valZ < 4000) {
// Update bounds
if (valX < g_FromChunkX) {
g_FromChunkX = valX;
}
if (valX > g_ToChunkX) {
g_ToChunkX = valX;
}
if (valZ < g_FromChunkZ) {
g_FromChunkZ = valZ;
}
if (valZ > g_ToChunkZ) {
g_ToChunkZ = valZ;
}
string full = path + "/" + chunk.name;
chunks.push_back(new Chunk(full.c_str(), valX, valZ));
} else {
printf("Ignoring bad chunk at %d %d\n", valX, valZ);
}
}
} while (Dir::next(sd, (char *)path.c_str(), chunk));
Dir::close(sd);
}
}
} while (Dir::next(d, (char *)base2.c_str(), file));
Dir::close(d);
}
printProgress(10, 10);
g_ToChunkX++;
g_ToChunkZ++;
//
for (charList::iterator it = subdirs.begin(); it != subdirs.end(); it++) {
free(*it);
}
printf("Min: (%d|%d) Max: (%d|%d)\n", g_FromChunkX, g_FromChunkZ, g_ToChunkX, g_ToChunkZ);
return true;
}
static bool scanWorldDirectoryRegion(const char *fromPath)
{
// OK go
for (chunkList::iterator it = chunks.begin(); it != chunks.end(); it++) {
delete *it;
}
chunks.clear();
g_FromChunkX = g_FromChunkZ = 10000000;
g_ToChunkX = g_ToChunkZ = -10000000;
// Read subdirs now
string path(fromPath);
path.append("/region");
printf("Scanning world...\n");
myFile region;
DIRHANDLE sd = Dir::open((char *)path.c_str(), region);
if (sd != NULL) {
do { // Here we finally arrived at the region files
if (!region.isdir && region.name[0] == 'r' && region.name[1] == '.') { // Make sure filename is a region
char *s = region.name;
const bool anvilFile = strcmp(".mca", RIGHTSTRING(s, 4)) == 0;
if ((g_WorldFormat == 2 && anvilFile) || (g_WorldFormat == 1 && !anvilFile)) {
// Extract x coordinate from region filename
s += 2;
const int valX = atoi(s) * REGIONSIZE;
// Extract z coordinate from region filename
while (*s != '.' && *s != '\0') {
++s;
}
if (*s == '.') {
const int valZ = atoi(s+1) * REGIONSIZE;
if (valX > -4000 && valX < 4000 && valZ > -4000 && valZ < 4000) {
string full = path + "/" + region.name;
chunks.push_back(new Chunk(full.c_str(), valX, valZ));
//printf("Good region at %d %d\n", valX, valZ);
} else {
printf("Ignoring bad region at %d %d\n", valX, valZ);
}
}
}
}
} while (Dir::next(sd, (char *)path.c_str(), region));
Dir::close(sd);
}
// Read all region files' headers to figure out which chunks actually exist
// It would be sufficient to just do this on those which form the edge
// Have yet to find out how slow this is on big maps to see if it's worth the effort
for (pointList::iterator it = points.begin(); it != points.end(); it++) {
delete *it;
}
points.clear();
for (chunkList::iterator it = chunks.begin(); it != chunks.end(); it++) {
Chunk &chunk = (**it);
FILE *fh = fopen(chunk.filename, "rb");
//printf("Plik %s\n",chunk.filename);
if (fh == NULL) {
printf("Cannot scan region %s\n",chunk.filename);
*chunk.filename = '\0';
continue;
}
uint8_t buffer[REGIONSIZE * REGIONSIZE * 4];
if (fread(buffer, 4, REGIONSIZE * REGIONSIZE, fh) != REGIONSIZE * REGIONSIZE) {
printf("Could not read header from %s\n", chunk.filename);
*chunk.filename = '\0';
continue;
}
fclose(fh);
// Check for existing chunks in region and update bounds
for (int i = 0; i < REGIONSIZE * REGIONSIZE; ++i) {
const uint32_t offset = (_ntohl(buffer + i * 4) >> 8) * 4096;
if (offset == 0) continue;
//printf("Scan region %s, offset %d (%d)\n",chunk.filename,offset,i);
const int valX = chunk.x + i % REGIONSIZE;
const int valZ = chunk.z + i / REGIONSIZE;
points.push_back(new Point(valX, valZ));
if (valX < g_FromChunkX) {
g_FromChunkX = valX;
}
if (valX > g_ToChunkX) {
g_ToChunkX = valX;
}
if (valZ < g_FromChunkZ) {
g_FromChunkZ = valZ;
}
if (valZ > g_ToChunkZ) {
g_ToChunkZ = valZ;
}
}
}
g_ToChunkX++;
g_ToChunkZ++;
//
printf("Min: (%d|%d) Max: (%d|%d)\n", g_FromChunkX, g_FromChunkZ, g_ToChunkX, g_ToChunkZ);
return true;
}
bool loadEntireTerrain()
{
if (g_WorldFormat != 0) return loadAllRegions();
if (chunks.empty()) {
return false;
}
allocateTerrain();
const size_t max = chunks.size();
size_t count = 0;
printf("Loading all chunks..\n");
for (chunkList::iterator it = chunks.begin(); it != chunks.end(); it++) {
printProgress(count++, max);
loadChunk((**it).filename);
delete *it;
}
chunks.clear();
printProgress(10, 10);
return true;
}
bool loadTerrain(const char *fromPath, int &loadedChunks)
{
loadedChunks = 0;
if (g_WorldFormat != 0) return loadTerrainRegion(fromPath, loadedChunks);
if (fromPath == NULL || *fromPath == '\0') {
return false;
}
allocateTerrain();
string path(fromPath);
if (path.at(path.size()-1) != '/') {
path.append("/");
}
printf("Loading all chunks..\n");
for (int chunkZ = g_FromChunkZ; chunkZ < g_ToChunkZ; ++chunkZ) {
printProgress(chunkZ - g_FromChunkZ, g_ToChunkZ - g_FromChunkZ);
for (int chunkX = g_FromChunkX; chunkX < g_ToChunkX; ++chunkX) {
string thispath = path + base36((chunkX + 640000) % 64) + "/" + base36((chunkZ + 640000) % 64) + "/c." + base36(chunkX) + "." + base36(chunkZ) + ".dat";
if (loadChunk(thispath.c_str())) {
++loadedChunks;
}
}
}
// Done loading all chunks
printProgress(10, 10);
return true;
}
static bool loadChunk(const char *streamOrFile, const size_t streamLen)
{
bool ok = false;
NBT *chunk;
if (streamLen == 0) { // File
chunk = new NBT(streamOrFile, ok);
} else {
chunk = new NBT((uint8_t*)streamOrFile, streamLen, true, ok);
}
if (!ok) {
//printf("Error loading chunk.\n");
delete chunk;
return false; // chunk does not exist
}
NBT_Tag *level = NULL;
ok = chunk->getCompound("Level", level);
if (!ok) {
printf("No level\n");
delete chunk;
return false;
}
int32_t chunkX, chunkZ;
ok = level->getInt("xPos", chunkX);
ok = ok && level->getInt("zPos", chunkZ);
if (!ok) {
printf("No pos\n");
delete chunk;
return false;
}
// Check if chunk is in desired bounds (not a chunk where the filename tells a different position)
if (chunkX < g_FromChunkX || chunkX >= g_ToChunkX || chunkZ < g_FromChunkZ || chunkZ >= g_ToChunkZ) {
if (streamLen == 0) printf("Chunk is out of bounds. %d %d\n", chunkX, chunkZ);
delete chunk;
return false; // Nope, its not...
}
if (g_WorldFormat == 2) {
bool ret = loadAnvilChunk(level, chunkX, chunkZ);
delete chunk;
return ret;
}
//
const int offsetz = (chunkZ - g_FromChunkZ) * CHUNKSIZE_Z;
const int offsetx = (chunkX - g_FromChunkX) * CHUNKSIZE_X;
uint8_t *blockdata, *lightdata, *skydata, *justData;
int32_t len;
ok = level->getByteArray("Blocks", blockdata, len);
if (!ok || len < CHUNKSIZE_X * CHUNKSIZE_Z * CHUNKSIZE_Y) {
printf("No blocks\n");
delete chunk;
return false;
}
ok = level->getByteArray("Data", justData, len);
if (!ok || len < (CHUNKSIZE_X * CHUNKSIZE_Z * CHUNKSIZE_Y) / 2) {
printf("No block data\n");
delete chunk;
return false;
}
if (g_Nightmode || g_Skylight) { // If nightmode, we need the light information too
ok = level->getByteArray("BlockLight", lightdata, len);
if (!ok || len < (CHUNKSIZE_X * CHUNKSIZE_Z * CHUNKSIZE_Y) / 2) {
printf("No block light\n");
delete chunk;
return false;
}
}
if (g_Skylight) { // Skylight desired - wish granted
ok = level->getByteArray("SkyLight", skydata, len);
if (!ok || len < (CHUNKSIZE_X * CHUNKSIZE_Z * CHUNKSIZE_Y) / 2) {
delete chunk;
return false;
}
}
// Markers
if (g_MarkerCount != 0) for (int i = 0; i < g_MarkerCount; ++i) {
Marker &m = g_Markers[i];
if (m.chunkX == chunkX && m.chunkZ == chunkZ) {
memset(blockdata + ((m.offsetZ + (m.offsetX * CHUNKSIZE_Z)) * CHUNKSIZE_Y), m.color, CHUNKSIZE_Y);
}
}
// Now read all blocks from this chunk and copy them to the world array
// Rotation introduces lots of if-else blocks here :-(
// Maybe make the macros functions and then use pointers.... Probably not faster
for (int x = 0; x < CHUNKSIZE_X; ++x) {
for (int z = 0; z < CHUNKSIZE_Z; ++z) {
if (g_Hell || g_ServerHell) {
// Remove blocks on top, otherwise there is not much to see here
int massive = 0;
uint8_t *bp = blockdata + ((z + (x * CHUNKSIZE_Z) + 1) * CHUNKSIZE_Y) - 1;
int i;
for (i = 0; i < 74; ++i) { // Go down 74 blocks from the ceiling to see if there is anything except solid
if (massive && (*bp == AIR || *bp == LAVA || *bp == STAT_LAVA)) {
if (--massive == 0) {
break; // Ignore caves that are only 2 blocks high
}
}
if (*bp != AIR && *bp != LAVA && *bp != STAT_LAVA) {
massive = 3;
}
--bp;
}
// So there was some cave or anything before going down 70 blocks, everything above will get removed
// If not, only 45 blocks starting at the ceiling will be removed
if (i > 70) {
i = 45; // TODO: Make this configurable
}
bp = blockdata + ((z + (x * CHUNKSIZE_Z) + 1) * CHUNKSIZE_Y) - 1;
for (int j = 0; j < i; ++j) {
*bp-- = AIR;
}
}
uint8_t *targetBlock;
if (g_Orientation == East) {
targetBlock = &BLOCKEAST(x + offsetx, 0, z + offsetz);
} else if (g_Orientation == North) {
targetBlock = &BLOCKNORTH(x + offsetx, 0, z + offsetz);
} else if (g_Orientation == South) {
targetBlock = &BLOCKSOUTH(x + offsetx, 0, z + offsetz);
} else {
targetBlock = &BLOCKWEST(x + offsetx, 0, z + offsetz);
}
// Following code applies only to modes (ab)using the light map, and for block remapping (wool color, trees, steps)
const int toY = g_MapsizeY + g_MapminY;
for (int y = (g_MapminY / 2) * 2; y < toY; ++y) {
const int oy = y - g_MapminY;
uint8_t &block = blockdata[y + (z + (x * CHUNKSIZE_Z)) * CHUNKSIZE_Y];
// Wool/wood/leaves block hack: Additional block data determines type of this block, here those get remapped to other block ids
// Ignore leaves for now if biomes are used, since I have no clue how the color shifting works then
assignBlock(block, targetBlock, x, y, z, justData);
if (g_Underground) {
if (y < g_MapminY) continue; // As we start at even numbers there might be no block data here
if (block == TORCH) {
// In underground mode, the lightmap is also used, but the values are calculated manually, to only show
// caves the players have discovered yet. It's not perfect of course, but works ok.
lightCave(x + offsetx, y, z + offsetz);
}
} else if (g_Skylight && y % 2 == 0 && y >= g_MapminY) { // copy light info too. Only every other time, since light info is 4 bits
const uint8_t &light = lightdata[(y / 2) + (z + (x * CHUNKSIZE_Z)) * (CHUNKSIZE_Y / 2)];
const uint8_t highlight = (light >> 4) & 0x0F;
const uint8_t lowlight = (light & 0x0F);
const uint8_t &sky = skydata[(y / 2) + (z + (x * CHUNKSIZE_Z)) * (CHUNKSIZE_Y / 2)];
uint8_t highsky = ((sky >> 4) & 0x0F);
uint8_t lowsky = (sky & 0x0F);
if (g_Nightmode) {
highsky = clamp(highsky / 3 - 2);
lowsky = clamp(lowsky / 3 - 2);
}
if (g_Orientation == East) {
SETLIGHTEAST(x + offsetx, oy, z + offsetz) = (MAX(highlight, highsky) << 4) | (MAX(lowlight, lowsky) & 0x0F);
} else if (g_Orientation == North) {
SETLIGHTNORTH(x + offsetx, oy, z + offsetz) = (MAX(highlight, highsky) << 4) | (MAX(lowlight, lowsky) & 0x0F);
} else if (g_Orientation == South) {
SETLIGHTSOUTH(x + offsetx, oy, z + offsetz) = (MAX(highlight, highsky) << 4) | (MAX(lowlight, lowsky) & 0x0F);
} else {
SETLIGHTWEST(x + offsetx, oy, z + offsetz) = (MAX(highlight, highsky) << 4) | (MAX(lowlight, lowsky) & 0x0F);
}
} else if (g_Nightmode && y % 2 == 0 && y >= g_MapminY) {
if (g_Orientation == East) {
SETLIGHTEAST(x + offsetx, oy, z + offsetz) = lightdata[(y / 2) + (z + (x * CHUNKSIZE_Z)) * (CHUNKSIZE_Y / 2)];
} else if (g_Orientation == North) {
SETLIGHTNORTH(x + offsetx, oy, z + offsetz) = lightdata[(y / 2) + (z + (x * CHUNKSIZE_Z)) * (CHUNKSIZE_Y / 2)];
} else if (g_Orientation == South) {
SETLIGHTSOUTH(x + offsetx, oy, z + offsetz) = lightdata[(y / 2) + (z + (x * CHUNKSIZE_Z)) * (CHUNKSIZE_Y / 2)];
} else {
SETLIGHTWEST(x + offsetx, oy, z + offsetz) = lightdata[(y / 2) + (z + (x * CHUNKSIZE_Z)) * (CHUNKSIZE_Y / 2)];
}
}
}
} // z
} // x
delete chunk;
return true;
}
static bool loadAnvilChunk(NBT_Tag * const level, const int32_t chunkX, const int32_t chunkZ)
{
uint8_t *blockdata, *lightdata, *skydata, *justData;
int32_t len, yoffset, yoffsetsomething = (g_MapminY + SECTION_Y * 10000) % SECTION_Y;
int8_t yo;
list<NBT_Tag *> *sections = NULL;
bool ok;
ok = level->getList("Sections", sections);
if (!ok) {
printf("No sections found in region\n");
return false;
}
//
const int offsetz = (chunkZ - g_FromChunkZ) * CHUNKSIZE_Z;
const int offsetx = (chunkX - g_FromChunkX) * CHUNKSIZE_X;
for (list<NBT_Tag *>::iterator it = sections->begin(); it != sections->end(); it++) {
NBT_Tag *section = *it;
ok = section->getByte("Y", yo);
if (!ok) {
printf("Y-Offset not found in section\n");
return false;
}
if (yo < g_SectionMin || yo > g_SectionMax) continue;
yoffset = (SECTION_Y * (int)(yo - g_SectionMin)) - yoffsetsomething;
if (yoffset < 0) yoffset = 0;
ok = section->getByteArray("Blocks", blockdata, len);
if (!ok || len < CHUNKSIZE_X * CHUNKSIZE_Z * SECTION_Y) {
printf("No blocks\n");
return false;
}
ok = section->getByteArray("Data", justData, len);
if (!ok || len < (CHUNKSIZE_X * CHUNKSIZE_Z * SECTION_Y) / 2) {
printf("No block data\n");
return false;
}
if (g_Nightmode || g_Skylight) { // If nightmode, we need the light information too
ok = section->getByteArray("BlockLight", lightdata, len);
if (!ok || len < (CHUNKSIZE_X * CHUNKSIZE_Z * SECTION_Y) / 2) {
printf("No block light\n");
return false;
}
}
if (g_Skylight) { // Skylight desired - wish granted
ok = section->getByteArray("SkyLight", skydata, len);
if (!ok || len < (CHUNKSIZE_X * CHUNKSIZE_Z * SECTION_Y) / 2) {
return false;
}
}
// Copy data
for (int x = 0; x < CHUNKSIZE_X; ++x) {
for (int z = 0; z < CHUNKSIZE_Z; ++z) {
uint8_t *targetBlock, *lightByte;
if (g_Orientation == East) {
targetBlock = &BLOCKEAST(x + offsetx, yoffset, z + offsetz);
if (g_Skylight || g_Nightmode) lightByte = &SETLIGHTEAST(x + offsetx, yoffset, z + offsetz);
} else if (g_Orientation == North) {
targetBlock = &BLOCKNORTH(x + offsetx, yoffset, z + offsetz);
if (g_Skylight || g_Nightmode) lightByte = &SETLIGHTNORTH(x + offsetx, yoffset, z + offsetz);
} else if (g_Orientation == South) {
targetBlock = &BLOCKSOUTH(x + offsetx, yoffset, z + offsetz);
if (g_Skylight || g_Nightmode) lightByte = &SETLIGHTSOUTH(x + offsetx, yoffset, z + offsetz);
} else {
targetBlock = &BLOCKWEST(x + offsetx, yoffset, z + offsetz);
if (g_Skylight || g_Nightmode) lightByte = &SETLIGHTWEST(x + offsetx, yoffset, z + offsetz);
}
//const int toY = g_MapsizeY + g_MapminY;
for (int y = 0; y < SECTION_Y; ++y) {
// In bounds check
if (g_SectionMin == yo && y < yoffsetsomething) continue;
if (g_SectionMax == yo && y + yoffset >= g_MapsizeY) break;
// Block data
uint8_t &block = blockdata[x + (z + (y * CHUNKSIZE_Z)) * CHUNKSIZE_X];
assignBlock(block, targetBlock, x, y, z, justData);
// Light
if (g_Underground) {
if (block == TORCH) {
if (y + yoffset < g_MapminY) continue;
printf("Torch at %d %d %d\n", x + offsetx, yoffset + y, z + offsetz);
lightCave(x + offsetx, yoffset + y, z + offsetz);
}
} else if (g_Skylight && (y & 1) == 0) {
const uint8_t highlight = ((lightdata[(x + (z + ((y + 1) * CHUNKSIZE_Z)) * CHUNKSIZE_X) / 2] >> ((x & 1) * 4)) & 0x0F);
const uint8_t lowlight = ((lightdata[(x + (z + (y * CHUNKSIZE_Z)) * CHUNKSIZE_X) / 2] >> ((x & 1) * 4)) & 0x0F);
uint8_t highsky = ((skydata[(x + (z + ((y + 1) * CHUNKSIZE_Z)) * CHUNKSIZE_X) / 2] >> ((x & 1) * 4)) & 0x0F);
uint8_t lowsky = ((skydata[(x + (z + (y * CHUNKSIZE_Z)) * CHUNKSIZE_X) / 2] >> ((x & 1) * 4)) & 0x0F);
if (g_Nightmode) {
highsky = clamp(highsky / 3 - 2);
lowsky = clamp(lowsky / 3 - 2);
}
*lightByte++ = ((MAX(highlight, highsky) & 0x0F) << 4) | (MAX(lowlight, lowsky) & 0x0F);
} else if (g_Nightmode && (y & 1) == 0) {
*lightByte++ = ((lightdata[(x + (z + (y * CHUNKSIZE_Z)) * CHUNKSIZE_X) / 2] >> ((x & 1) * 4)) & 0x0F)
| ((lightdata[(x + (z + ((y + 1) * CHUNKSIZE_Z)) * CHUNKSIZE_X) / 2] >> ((x & 1) * 4)) << 4);
}
} // for y
} // for z
} // for x
/*
// Markers Anvil - TODO
if (g_MarkerCount != 0) for (int i = 0; i < g_MarkerCount; ++i) {
Marker &m = g_Markers[i];
if (m.chunkX == chunkX && m.chunkZ == chunkZ) {
memset(blockdata + ((m.offsetZ + (m.offsetX * CHUNKSIZE_Z)) * SECTION_Y), m.color, SECTION_Y - 1);
printf("marker-%d-%d---%d-%d---%d---\n\n",chunkX,chunkZ,m.offsetX,m.offsetZ,m.color);
}
}
*/
}
return true;
}
uint64_t calcTerrainSize(const int chunksX, const int chunksZ)
{
uint64_t size = uint64_t(chunksX+2) * CHUNKSIZE_X * uint64_t(chunksZ+2) * CHUNKSIZE_Z * uint64_t(g_MapsizeY);
if (g_Nightmode || g_Underground || g_Skylight || g_BlendUnderground) {
size += size / 2;
}
if (g_UseBiomes) {
size += uint64_t(chunksX+2) * CHUNKSIZE_X * uint64_t(chunksZ+2) * CHUNKSIZE_Z * sizeof(uint16_t);
}
return size;
}
void calcBitmapOverdraw(int &left, int &right, int &top, int &bottom)
{
top = left = bottom = right = 0x0fffffff;
int val, x, z;
chunkList::iterator itC;
pointList::iterator itP;
if (g_WorldFormat != 0) {
itP = points.begin();
} else {
itC = chunks.begin();
}
for (;;) {
if (g_WorldFormat != 0) {
if (itP == points.end()) break;
x = (**itP).x;
z = (**itP).z;
} else {
if (itC == chunks.end()) break;
x = (**itC).x;
z = (**itC).z;
}
if (g_Orientation == North) {
// Right
val = (((g_ToChunkX - 1) - x) * CHUNKSIZE_X * 2)
+ ((z - g_FromChunkZ) * CHUNKSIZE_Z * 2);
if (val < right) {
right = val;
}
// Left
val = (((g_ToChunkZ - 1) - z) * CHUNKSIZE_Z * 2)
+ ((x - g_FromChunkX) * CHUNKSIZE_X * 2);
if (val < left) {
left = val;
}
// Top
val = (z - g_FromChunkZ) * CHUNKSIZE_Z + (x - g_FromChunkX) * CHUNKSIZE_X;
if (val < top) {
top = val;
}
// Bottom
val = (((g_ToChunkX - 1) - x) * CHUNKSIZE_X) + (((g_ToChunkZ - 1) - z) * CHUNKSIZE_Z);
if (val < bottom) {
bottom = val;
}
} else if (g_Orientation == South) {
// Right
val = (((g_ToChunkZ - 1) - z) * CHUNKSIZE_Z * 2)
+ ((x - g_FromChunkX) * CHUNKSIZE_X * 2);
if (val < right) {
right = val;
}
// Left
val = (((g_ToChunkX - 1) - x) * CHUNKSIZE_X * 2)
+ ((z - g_FromChunkZ) * CHUNKSIZE_Z * 2);
if (val < left) {
left = val;
}
// Top
val = ((g_ToChunkZ - 1) - z) * CHUNKSIZE_Z + ((g_ToChunkX - 1) - x) * CHUNKSIZE_X;
if (val < top) {
top = val;
}
// Bottom
val = ((x - g_FromChunkX) * CHUNKSIZE_X) + ((z - g_FromChunkZ) * CHUNKSIZE_Z);
if (val < bottom) {
bottom = val;
}
} else if (g_Orientation == East) {
// Right
val = ((g_ToChunkZ - 1) - z) * CHUNKSIZE_Z * 2 + ((g_ToChunkX - 1) - x) * CHUNKSIZE_X * 2;
if (val < right) {
right = val;
}
// Left
val = ((x - g_FromChunkX) * CHUNKSIZE_X) * 2 + + ((z - g_FromChunkZ) * CHUNKSIZE_Z) * 2;
if (val < left) {
left = val;
}
// Top
val = ((g_ToChunkX - 1) - x) * CHUNKSIZE_X
+ (z - g_FromChunkZ) * CHUNKSIZE_Z;
if (val < top) {
top = val;
}
// Bottom
val = ((g_ToChunkZ - 1) - z) * CHUNKSIZE_Z
+ (x - g_FromChunkX) * CHUNKSIZE_X;
if (val < bottom) {
bottom = val;
}
} else {
// Right
val = ((x - g_FromChunkX) * CHUNKSIZE_X) * 2 + + ((z - g_FromChunkZ) * CHUNKSIZE_Z) * 2;
if (val < right) {
right = val;
}
// Left
val = ((g_ToChunkZ - 1) - z) * CHUNKSIZE_Z * 2 + ((g_ToChunkX - 1) - x) * CHUNKSIZE_X * 2;
if (val < left) {
left = val;
}
// Top
val = ((g_ToChunkZ - 1) - z) * CHUNKSIZE_Z
+ (x - g_FromChunkX) * CHUNKSIZE_X;
if (val < top) {
top = val;
}
// Bottom
val = ((g_ToChunkX - 1) - x) * CHUNKSIZE_X
+ (z - g_FromChunkZ) * CHUNKSIZE_Z;
if (val < bottom) {
bottom = val;
}
}
//
if (g_WorldFormat != 0) {
itP++;
} else {
itC++;
}
}
}
static void allocateTerrain()
{
if (g_Terrain != NULL) {
delete[] g_Terrain;
}
if (g_Light != NULL) {
delete[] g_Light;
}
if (g_HeightMap != NULL) {
delete[] g_HeightMap;
}
g_HeightMap = new uint16_t[g_MapsizeX * g_MapsizeZ];
//printf("%d -- %d\n", g_MapsizeX, g_MapsizeZ); //dimensions of terrain map (in memory)
memset(g_HeightMap, 0, g_MapsizeX * g_MapsizeZ * sizeof(uint16_t));
const size_t terrainsize = g_MapsizeZ * g_MapsizeX * g_MapsizeY;
printf("Terrain takes up %.2fMiB", float(terrainsize / float(1024 * 1024)));
g_Terrain = new uint8_t[terrainsize];
memset(g_Terrain, 0, terrainsize); // Preset: Air
if (g_Nightmode || g_Underground || g_BlendUnderground || g_Skylight) {
lightsize = g_MapsizeZ * g_MapsizeX * ((g_MapsizeY + (g_MapminY % 2 == 0 ? 1 : 2)) / 2);
printf(", lightmap %.2fMiB", float(lightsize / float(1024 * 1024)));
g_Light = new uint8_t[lightsize];
// Preset: all bright / dark depending on night or day
if (g_Nightmode) {
memset(g_Light, 0x11, lightsize);
} else if (g_Underground) {
memset(g_Light, 0x00, lightsize);
} else {
memset(g_Light, 0xFF, lightsize);
}
}
printf("\n");
}
void clearLightmap()
{
if (g_Light != NULL) {
memset(g_Light, 0x00, lightsize);
}
}
/**
* Round down to the nearest multiple of 8, e.g. floor8(-5) == 8
*/
static const inline int floorBiome(const int val)
{
if (val < 0) {
return ((val - (CHUNKS_PER_BIOME_FILE - 1)) / CHUNKS_PER_BIOME_FILE) * CHUNKS_PER_BIOME_FILE;
}
return (val / CHUNKS_PER_BIOME_FILE) * CHUNKS_PER_BIOME_FILE;
}
/**
* Round down to the nearest multiple of 32, e.g. floor32(-5) == 32
*/
static const inline int floorRegion(const int val)
{
if (val < 0) {
return ((val - (REGIONSIZE - 1)) / REGIONSIZE) * REGIONSIZE;
}
return (val / REGIONSIZE) * REGIONSIZE;
}
/**
* Load all the 8x8-chunks-files containing biome information
*/
void loadBiomeMap(const char* path)
{
printf("Loading biome data...\n");
const uint64_t size = g_MapsizeX * g_MapsizeZ;
if (g_BiomeMapSize == 0 || size > g_BiomeMapSize) {
if (g_BiomeMap == NULL) delete[] g_BiomeMap;
g_BiomeMapSize = size;
g_BiomeMap = new uint16_t[size];
}
memset(g_BiomeMap, 0, size * sizeof(uint16_t));
//
const int tmpMin = -floorBiome(g_FromChunkX);
for (int x = floorBiome(g_FromChunkX); x <= floorBiome(g_ToChunkX); x += CHUNKS_PER_BIOME_FILE) {
printProgress(size_t(x + tmpMin), size_t(floorBiome(g_ToChunkX) + tmpMin));
for (int z = floorBiome(g_FromChunkZ); z <= floorBiome(g_ToChunkZ); z += CHUNKS_PER_BIOME_FILE) {
loadBiomeChunk(path, x, z);
}
}
printProgress(10, 10);
}
#define REGION_HEADER_SIZE REGIONSIZE * REGIONSIZE * 4
#define DECOMPRESSED_BUFFER 1000 * 1024
#define COMPRESSED_BUFFER 100 * 1024
/**
* Load all the 32x32-region-files containing chunks information
*/
static bool loadAllRegions()
{
if (chunks.empty()) {
return false;
}
allocateTerrain();
const size_t max = chunks.size();
size_t count = 0;
printf("Loading all chunks..\n");
for (chunkList::iterator it = chunks.begin(); it != chunks.end(); it++) {
Chunk &chunk = (**it);
printProgress(count++, max);
int i;
loadRegion(chunk.filename, true, i);
}
printProgress(10, 10);
return true;
}
/**
* Load all the 32x32 region files withing the specified bounds
*/
static bool loadTerrainRegion(const char *fromPath, int &loadedChunks)
{
loadedChunks = 0;
if (fromPath == NULL || *fromPath == '\0') {
return false;
}
allocateTerrain();
size_t maxlen = strlen(fromPath) + 40;
char *path = new char[maxlen];
printf("Loading all chunks..\n");
//
const int tmpMin = -floorRegion(g_FromChunkX);
for (int x = floorRegion(g_FromChunkX); x <= floorRegion(g_ToChunkX); x += REGIONSIZE) {
printProgress(size_t(x + tmpMin), size_t(floorRegion(g_ToChunkX) + tmpMin));
for (int z = floorRegion(g_FromChunkZ); z <= floorRegion(g_ToChunkZ); z += REGIONSIZE) {
if (g_WorldFormat == 2) {
snprintf(path, maxlen, "%s/region/r.%d.%d.mca", fromPath, int(x / REGIONSIZE), int(z / REGIONSIZE));
loadRegion(path, false, loadedChunks);
} else {
snprintf(path, maxlen, "%s/region/r.%d.%d.mcr", fromPath, int(x / REGIONSIZE), int(z / REGIONSIZE));
if (!loadRegion(path, false, loadedChunks)) {
snprintf(path, maxlen, "%s/region/r.%d.%d.data", fromPath, int(x / REGIONSIZE), int(z / REGIONSIZE));
loadRegion(path, false, loadedChunks);
}
}
}
}
delete[] path;
return true;
}
static bool loadRegion(const char* file, const bool mustExist, int &loadedChunks)
{
uint8_t buffer[COMPRESSED_BUFFER], decompressedBuffer[DECOMPRESSED_BUFFER];
FILE *rp = fopen(file, "rb");
if (rp == NULL) {
if (mustExist) printf("Error opening region file %s\n", file);
return false;
}
if (fread(buffer, 4, REGIONSIZE * REGIONSIZE, rp) != REGIONSIZE * REGIONSIZE) {
printf("Header too short in %s\n", file);
fclose(rp);
return false;
}
// Sort chunks using a map, so we access the file as sequential as possible
chunkMap localChunks;
for (uint32_t i = 0; i < REGION_HEADER_SIZE; i += 4) {
uint32_t offset = (_ntohl(buffer + i) >> 8) * 4096;
if (offset == 0) continue;
localChunks[offset] = i;
}
if (localChunks.size() == 0) return false;
z_stream zlibStream;
for (chunkMap::iterator ci = localChunks.begin(); ci != localChunks.end(); ci++) {
uint32_t offset = ci->first;
// Not even needed. duh.
//uint32_t index = ci->second;
//int x = (**it).x + (index / 4) % REGIONSIZE;
//int z = (**it).z + (index / 4) / REGIONSIZE;
if (0 != fseek(rp, offset, SEEK_SET)) {
printf("Error seeking to chunk in region file %s\n", file);
continue;
}
if (1 != fread(buffer, 5, 1, rp)) {
printf("Error reading chunk size from region file %s\n", file);
continue;
}
uint32_t len = _ntohl(buffer);
uint8_t version = buffer[4];
if (len == 0) continue;
len--;
if (len > COMPRESSED_BUFFER) {
printf("Chunk too big in %s\n", file);
continue;
}
if (fread(buffer, 1, len, rp) != len) {
printf("Not enough input for chunk in %s\n", file);
continue;
}
if (version == 1 || version == 2) { // zlib/gzip deflate
memset(&zlibStream, 0, sizeof(z_stream));
zlibStream.next_out = (Bytef*)decompressedBuffer;
zlibStream.avail_out = DECOMPRESSED_BUFFER;
zlibStream.avail_in = len;
zlibStream.next_in = (Bytef*)buffer;
inflateInit2(&zlibStream, 32 + MAX_WBITS);
int status = inflate(&zlibStream, Z_FINISH); // decompress in one step
inflateEnd(&zlibStream);
if (status != Z_STREAM_END) {
printf("Error decompressing chunk from %s\n", file);
continue;
}
len = zlibStream.total_out;
} else {
printf("Unsupported McRegion version: %d\n", (int)version);
continue;
}
if (loadChunk((char*)decompressedBuffer, len)) {
loadedChunks++;
}
}
fclose(rp);
return true;
}
static const inline uint16_t ntoh16(const uint16_t val)
{
return (uint16_t(*(uint8_t*)&val) << 8) + uint16_t(*(((uint8_t*)&val) + 1));
}
static void loadBiomeChunk(const char* path, const int chunkX, const int chunkZ)
{
# define BIOME_ENTRIES CHUNKS_PER_BIOME_FILE * CHUNKS_PER_BIOME_FILE * CHUNKSIZE_X * CHUNKSIZE_Z
# define RECORDS_PER_LINE CHUNKSIZE_X * CHUNKS_PER_BIOME_FILE
const size_t size = strlen(path) + 50;
char *file = new char[size];
snprintf(file, size, "%s/b.%d.%d.biome", path, chunkX / CHUNKS_PER_BIOME_FILE, chunkZ / CHUNKS_PER_BIOME_FILE);
if (!fileExists(file)) {
printf("'%s' doesn't exist. Please update biome cache.\n", file);
delete[] file;
return;
}
FILE *fh = fopen(file, "rb");
uint16_t *data = new uint16_t[BIOME_ENTRIES];
const bool success = (fread(data, sizeof(uint16_t), BIOME_ENTRIES, fh) == BIOME_ENTRIES);