minetest/src/mg_schematic.cpp

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/*
Minetest
Copyright (C) 2010-2014 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <fstream>
#include "mg_schematic.h"
#include "mapgen.h"
#include "map.h"
#include "mapblock.h"
#include "log.h"
#include "util/numeric.h"
#include "util/serialize.h"
#include "serialization.h"
#include "filesys.h"
const char *SchematicManager::ELEMENT_TITLE = "schematic";
///////////////////////////////////////////////////////////////////////////////
SchematicManager::SchematicManager(IGameDef *gamedef) :
GenElementManager(gamedef)
{
}
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///////////////////////////////////////////////////////////////////////////////
Schematic::Schematic()
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{
schemdata = NULL;
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slice_probs = NULL;
flags = 0;
size = v3s16(0, 0, 0);
}
Schematic::~Schematic()
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{
delete []schemdata;
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delete []slice_probs;
}
void Schematic::resolveNodeNames(NodeResolveInfo *nri)
{
m_ndef->getIdsFromResolveInfo(nri, c_nodes);
}
void Schematic::updateContentIds()
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{
if (flags & SCHEM_CIDS_UPDATED)
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return;
flags |= SCHEM_CIDS_UPDATED;
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size_t bufsize = size.X * size.Y * size.Z;
for (size_t i = 0; i != bufsize; i++)
schemdata[i].setContent(c_nodes[schemdata[i].getContent()]);
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}
void Schematic::blitToVManip(v3s16 p, ManualMapVoxelManipulator *vm,
Rotation rot, bool force_placement, INodeDefManager *ndef)
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{
int xstride = 1;
int ystride = size.X;
int zstride = size.X * size.Y;
updateContentIds();
s16 sx = size.X;
s16 sy = size.Y;
s16 sz = size.Z;
int i_start, i_step_x, i_step_z;
switch (rot) {
case ROTATE_90:
i_start = sx - 1;
i_step_x = zstride;
i_step_z = -xstride;
SWAP(s16, sx, sz);
break;
case ROTATE_180:
i_start = zstride * (sz - 1) + sx - 1;
i_step_x = -xstride;
i_step_z = -zstride;
break;
case ROTATE_270:
i_start = zstride * (sz - 1);
i_step_x = -zstride;
i_step_z = xstride;
SWAP(s16, sx, sz);
break;
default:
i_start = 0;
i_step_x = xstride;
i_step_z = zstride;
}
s16 y_map = p.Y;
for (s16 y = 0; y != sy; y++) {
if (slice_probs[y] != MTSCHEM_PROB_ALWAYS &&
myrand_range(1, 255) > slice_probs[y])
continue;
for (s16 z = 0; z != sz; z++) {
u32 i = z * i_step_z + y * ystride + i_start;
for (s16 x = 0; x != sx; x++, i += i_step_x) {
u32 vi = vm->m_area.index(p.X + x, y_map, p.Z + z);
if (!vm->m_area.contains(vi))
continue;
if (schemdata[i].getContent() == CONTENT_IGNORE)
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continue;
if (schemdata[i].param1 == MTSCHEM_PROB_NEVER)
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continue;
if (!force_placement) {
content_t c = vm->m_data[vi].getContent();
if (c != CONTENT_AIR && c != CONTENT_IGNORE)
continue;
}
if (schemdata[i].param1 != MTSCHEM_PROB_ALWAYS &&
myrand_range(1, 255) > schemdata[i].param1)
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continue;
vm->m_data[vi] = schemdata[i];
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vm->m_data[vi].param1 = 0;
if (rot)
vm->m_data[vi].rotateAlongYAxis(ndef, rot);
}
}
y_map++;
}
}
void Schematic::placeStructure(Map *map, v3s16 p, u32 flags,
Rotation rot, bool force_placement, INodeDefManager *ndef)
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{
assert(schemdata != NULL);
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ManualMapVoxelManipulator *vm = new ManualMapVoxelManipulator(map);
if (rot == ROTATE_RAND)
rot = (Rotation)myrand_range(ROTATE_0, ROTATE_270);
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v3s16 s = (rot == ROTATE_90 || rot == ROTATE_270) ?
v3s16(size.Z, size.Y, size.X) : size;
if (flags & DECO_PLACE_CENTER_X)
p.X -= (s.X + 1) / 2;
if (flags & DECO_PLACE_CENTER_Y)
p.Y -= (s.Y + 1) / 2;
if (flags & DECO_PLACE_CENTER_Z)
p.Z -= (s.Z + 1) / 2;
v3s16 bp1 = getNodeBlockPos(p);
v3s16 bp2 = getNodeBlockPos(p + s - v3s16(1,1,1));
vm->initialEmerge(bp1, bp2);
blitToVManip(p, vm, rot, force_placement, ndef);
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std::map<v3s16, MapBlock *> lighting_modified_blocks;
std::map<v3s16, MapBlock *> modified_blocks;
vm->blitBackAll(&modified_blocks);
// TODO: Optimize this by using Mapgen::calcLighting() instead
lighting_modified_blocks.insert(modified_blocks.begin(), modified_blocks.end());
map->updateLighting(lighting_modified_blocks, modified_blocks);
MapEditEvent event;
event.type = MEET_OTHER;
for (std::map<v3s16, MapBlock *>::iterator
it = modified_blocks.begin();
it != modified_blocks.end(); ++it)
event.modified_blocks.insert(it->first);
map->dispatchEvent(&event);
}
bool Schematic::loadSchematicFromFile(const char *filename,
INodeDefManager *ndef, std::map<std::string, std::string> &replace_names)
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{
content_t cignore = CONTENT_IGNORE;
bool have_cignore = false;
std::ifstream is(filename, std::ios_base::binary);
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u32 signature = readU32(is);
if (signature != MTSCHEM_FILE_SIGNATURE) {
errorstream << "loadSchematicFile: invalid schematic "
"file" << std::endl;
return false;
}
u16 version = readU16(is);
if (version > MTSCHEM_FILE_VER_HIGHEST_READ) {
errorstream << "loadSchematicFile: unsupported schematic "
"file version" << std::endl;
return false;
}
size = readV3S16(is);
delete []slice_probs;
slice_probs = new u8[size.Y];
for (int y = 0; y != size.Y; y++)
slice_probs[y] = (version >= 3) ? readU8(is) : MTSCHEM_PROB_ALWAYS;
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NodeResolveInfo *nri = new NodeResolveInfo(this);
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u16 nidmapcount = readU16(is);
for (int i = 0; i != nidmapcount; i++) {
std::string name = deSerializeString(is);
if (name == "ignore") {
name = "air";
cignore = i;
have_cignore = true;
}
std::map<std::string, std::string>::iterator it;
it = replace_names.find(name);
if (it != replace_names.end())
name = it->second;
nri->nodenames.push_back(name);
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}
nri->nodename_sizes.push_back(nidmapcount);
ndef->pendNodeResolve(nri);
size_t nodecount = size.X * size.Y * size.Z;
delete []schemdata;
schemdata = new MapNode[nodecount];
MapNode::deSerializeBulk(is, SER_FMT_VER_HIGHEST_READ, schemdata,
nodecount, 2, 2, true);
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if (version == 1) { // fix up the probability values
for (size_t i = 0; i != nodecount; i++) {
if (schemdata[i].param1 == 0)
schemdata[i].param1 = MTSCHEM_PROB_ALWAYS;
if (have_cignore && schemdata[i].getContent() == cignore)
schemdata[i].param1 = MTSCHEM_PROB_NEVER;
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}
}
return true;
}
/*
Minetest Schematic File Format
All values are stored in big-endian byte order.
[u32] signature: 'MTSM'
[u16] version: 3
[u16] size X
[u16] size Y
[u16] size Z
For each Y:
[u8] slice probability value
[Name-ID table] Name ID Mapping Table
[u16] name-id count
For each name-id mapping:
[u16] name length
[u8[]] name
ZLib deflated {
For each node in schematic: (for z, y, x)
[u16] content
For each node in schematic:
[u8] probability of occurance (param1)
For each node in schematic:
[u8] param2
}
Version changes:
1 - Initial version
2 - Fixed messy never/always place; 0 probability is now never, 0xFF is always
3 - Added y-slice probabilities; this allows for variable height structures
*/
void Schematic::saveSchematicToFile(const char *filename, INodeDefManager *ndef)
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{
std::ostringstream ss(std::ios_base::binary);
writeU32(ss, MTSCHEM_FILE_SIGNATURE); // signature
writeU16(ss, MTSCHEM_FILE_VER_HIGHEST_WRITE); // version
writeV3S16(ss, size); // schematic size
for (int y = 0; y != size.Y; y++) // Y slice probabilities
writeU8(ss, slice_probs[y]);
std::vector<content_t> usednodes;
int nodecount = size.X * size.Y * size.Z;
build_nnlist_and_update_ids(schemdata, nodecount, &usednodes);
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u16 numids = usednodes.size();
writeU16(ss, numids); // name count
for (int i = 0; i != numids; i++)
ss << serializeString(ndef->get(usednodes[i]).name); // node names
// compressed bulk node data
MapNode::serializeBulk(ss, SER_FMT_VER_HIGHEST_WRITE, schemdata,
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nodecount, 2, 2, true);
fs::safeWriteToFile(filename, ss.str());
}
void build_nnlist_and_update_ids(MapNode *nodes, u32 nodecount,
std::vector<content_t> *usednodes)
{
std::map<content_t, content_t> nodeidmap;
content_t numids = 0;
for (u32 i = 0; i != nodecount; i++) {
content_t id;
content_t c = nodes[i].getContent();
std::map<content_t, content_t>::const_iterator it = nodeidmap.find(c);
if (it == nodeidmap.end()) {
id = numids;
numids++;
usednodes->push_back(c);
nodeidmap.insert(std::make_pair(c, id));
} else {
id = it->second;
}
nodes[i].setContent(id);
}
}
bool Schematic::getSchematicFromMap(Map *map, v3s16 p1, v3s16 p2)
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{
ManualMapVoxelManipulator *vm = new ManualMapVoxelManipulator(map);
v3s16 bp1 = getNodeBlockPos(p1);
v3s16 bp2 = getNodeBlockPos(p2);
vm->initialEmerge(bp1, bp2);
size = p2 - p1 + 1;
slice_probs = new u8[size.Y];
for (s16 y = 0; y != size.Y; y++)
slice_probs[y] = MTSCHEM_PROB_ALWAYS;
schemdata = new MapNode[size.X * size.Y * size.Z];
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u32 i = 0;
for (s16 z = p1.Z; z <= p2.Z; z++)
for (s16 y = p1.Y; y <= p2.Y; y++) {
u32 vi = vm->m_area.index(p1.X, y, z);
for (s16 x = p1.X; x <= p2.X; x++, i++, vi++) {
schemdata[i] = vm->m_data[vi];
schemdata[i].param1 = MTSCHEM_PROB_ALWAYS;
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}
}
delete vm;
return true;
}
void Schematic::applyProbabilities(v3s16 p0,
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std::vector<std::pair<v3s16, u8> > *plist,
std::vector<std::pair<s16, u8> > *splist)
{
for (size_t i = 0; i != plist->size(); i++) {
v3s16 p = (*plist)[i].first - p0;
int index = p.Z * (size.Y * size.X) + p.Y * size.X + p.X;
if (index < size.Z * size.Y * size.X) {
u8 prob = (*plist)[i].second;
schemdata[index].param1 = prob;
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// trim unnecessary node names from schematic
if (prob == MTSCHEM_PROB_NEVER)
schemdata[index].setContent(CONTENT_AIR);
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}
}
for (size_t i = 0; i != splist->size(); i++) {
s16 y = (*splist)[i].first - p0.Y;
slice_probs[y] = (*splist)[i].second;
}
}