minetest/src/mapnode.cpp

356 lines
8.3 KiB
C++

/*
Minetest-c55
Copyright (C) 2010 celeron55, Perttu Ahola <celeron55@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 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 General Public License for more details.
You should have received a copy of the GNU 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 "common_irrlicht.h"
#include "mapnode.h"
#include "porting.h"
#include <string>
#include "main.h" // For g_settings
#include "nodedef.h"
#include "content_mapnode.h" // For mapnode_translate_*_internal
#include "serialization.h" // For ser_ver_supported
/*
MapNode
*/
// Create directly from a nodename
// If name is unknown, sets CONTENT_IGNORE
MapNode::MapNode(INodeDefManager *ndef, const std::string &name,
u8 a_param1, u8 a_param2)
{
content_t id = CONTENT_IGNORE;
ndef->getId(name, id);
param1 = a_param1;
param2 = a_param2;
// Set content (param0 and (param2&0xf0)) after other params
// because this needs to override part of param2
setContent(id);
}
void MapNode::setLight(enum LightBank bank, u8 a_light, INodeDefManager *nodemgr)
{
// If node doesn't contain light data, ignore this
if(nodemgr->get(*this).param_type != CPT_LIGHT)
return;
if(bank == LIGHTBANK_DAY)
{
param1 &= 0xf0;
param1 |= a_light & 0x0f;
}
else if(bank == LIGHTBANK_NIGHT)
{
param1 &= 0x0f;
param1 |= (a_light & 0x0f)<<4;
}
else
assert(0);
}
u8 MapNode::getLight(enum LightBank bank, INodeDefManager *nodemgr) const
{
// Select the brightest of [light source, propagated light]
const ContentFeatures &f = nodemgr->get(*this);
u8 light = 0;
if(f.param_type == CPT_LIGHT)
{
if(bank == LIGHTBANK_DAY)
light = param1 & 0x0f;
else if(bank == LIGHTBANK_NIGHT)
light = (param1>>4)&0x0f;
else
assert(0);
}
if(f.light_source > light)
light = f.light_source;
return light;
}
bool MapNode::getLightBanks(u8 &lightday, u8 &lightnight, INodeDefManager *nodemgr) const
{
// Select the brightest of [light source, propagated light]
const ContentFeatures &f = nodemgr->get(*this);
if(f.param_type == CPT_LIGHT)
{
lightday = param1 & 0x0f;
lightnight = (param1>>4)&0x0f;
}
else
{
lightday = 0;
lightnight = 0;
}
if(f.light_source > lightday)
lightday = f.light_source;
if(f.light_source > lightnight)
lightnight = f.light_source;
return f.param_type == CPT_LIGHT || f.light_source != 0;
}
u8 MapNode::getFaceDir(INodeDefManager *nodemgr) const
{
const ContentFeatures &f = nodemgr->get(*this);
if(f.param_type_2 == CPT2_FACEDIR)
return getParam2() & 0x03;
return 0;
}
u8 MapNode::getWallMounted(INodeDefManager *nodemgr) const
{
const ContentFeatures &f = nodemgr->get(*this);
if(f.param_type_2 == CPT2_WALLMOUNTED)
return getParam2() & 0x07;
return 0;
}
v3s16 MapNode::getWallMountedDir(INodeDefManager *nodemgr) const
{
switch(getWallMounted(nodemgr))
{
case 0: default: return v3s16(0,1,0);
case 1: return v3s16(0,-1,0);
case 2: return v3s16(1,0,0);
case 3: return v3s16(-1,0,0);
case 4: return v3s16(0,0,1);
case 5: return v3s16(0,0,-1);
}
}
u32 MapNode::serializedLength(u8 version)
{
if(!ser_ver_supported(version))
throw VersionMismatchException("ERROR: MapNode format not supported");
if(version == 0)
return 1;
else if(version <= 9)
return 2;
else
return 3;
}
void MapNode::serialize(u8 *dest, u8 version)
{
if(!ser_ver_supported(version))
throw VersionMismatchException("ERROR: MapNode format not supported");
if(version <= 21)
{
serialize_pre22(dest, version);
return;
}
writeU8(dest+0, param0);
writeU8(dest+1, param1);
writeU8(dest+2, param2);
}
void MapNode::deSerialize(u8 *source, u8 version)
{
if(!ser_ver_supported(version))
throw VersionMismatchException("ERROR: MapNode format not supported");
if(version <= 21)
{
deSerialize_pre22(source, version);
return;
}
param0 = readU8(source+0);
param1 = readU8(source+1);
param2 = readU8(source+2);
}
void MapNode::serializeBulk(std::ostream &os, int version,
const MapNode *nodes, u32 nodecount,
u8 content_width, u8 params_width, bool compressed)
{
if(!ser_ver_supported(version))
throw VersionMismatchException("ERROR: MapNode format not supported");
assert(version >= 22);
assert(content_width == 1);
assert(params_width == 2);
SharedBuffer<u8> databuf(nodecount * (content_width + params_width));
// Serialize content
if(content_width == 1)
{
for(u32 i=0; i<nodecount; i++)
writeU8(&databuf[i], nodes[i].param0);
}
/* If param0 is extended to two bytes, use something like this: */
/*else if(content_width == 2)
{
for(u32 i=0; i<nodecount; i++)
writeU16(&databuf[i*2], nodes[i].param0);
}*/
// Serialize param1
u32 start1 = content_width * nodecount;
for(u32 i=0; i<nodecount; i++)
writeU8(&databuf[start1 + i], nodes[i].param1);
// Serialize param2
u32 start2 = (content_width + 1) * nodecount;
for(u32 i=0; i<nodecount; i++)
writeU8(&databuf[start2 + i], nodes[i].param2);
/*
Compress data to output stream
*/
if(compressed)
{
compressZlib(databuf, os);
}
else
{
os.write((const char*) &databuf[0], databuf.getSize());
}
}
// Deserialize bulk node data
void MapNode::deSerializeBulk(std::istream &is, int version,
MapNode *nodes, u32 nodecount,
u8 content_width, u8 params_width, bool compressed)
{
if(!ser_ver_supported(version))
throw VersionMismatchException("ERROR: MapNode format not supported");
assert(version >= 22);
assert(content_width == 1);
assert(params_width == 2);
// Uncompress or read data
u32 len = nodecount * (content_width + params_width);
SharedBuffer<u8> databuf(len);
if(compressed)
{
std::ostringstream os(std::ios_base::binary);
decompressZlib(is, os);
std::string s = os.str();
if(s.size() != len)
throw SerializationError("deSerializeBulkNodes: "
"decompress resulted in invalid size");
memcpy(&databuf[0], s.c_str(), len);
}
else
{
is.read((char*) &databuf[0], len);
if(is.eof() || is.fail())
throw SerializationError("deSerializeBulkNodes: "
"failed to read bulk node data");
}
// Deserialize content
if(content_width == 1)
{
for(u32 i=0; i<nodecount; i++)
nodes[i].param0 = readU8(&databuf[i]);
}
/* If param0 is extended to two bytes, use something like this: */
/*else if(content_width == 2)
{
for(u32 i=0; i<nodecount; i++)
nodes[i].param0 = readU16(&databuf[i*2]);
}*/
// Deserialize param1
u32 start1 = content_width * nodecount;
for(u32 i=0; i<nodecount; i++)
nodes[i].param1 = readU8(&databuf[start1 + i]);
// Deserialize param2
u32 start2 = (content_width + 1) * nodecount;
for(u32 i=0; i<nodecount; i++)
nodes[i].param2 = readU8(&databuf[start2 + i]);
}
/*
Legacy serialization
*/
void MapNode::serialize_pre22(u8 *dest, u8 version)
{
// Translate to wanted version
MapNode n_foreign = mapnode_translate_from_internal(*this, version);
u8 actual_param0 = n_foreign.param0;
// Convert special values from new version to old
if(version <= 18)
{
// In these versions, CONTENT_IGNORE and CONTENT_AIR
// are 255 and 254
if(actual_param0 == CONTENT_IGNORE)
actual_param0 = 255;
else if(actual_param0 == CONTENT_AIR)
actual_param0 = 254;
}
if(version == 0)
{
dest[0] = actual_param0;
}
else if(version <= 9)
{
dest[0] = actual_param0;
dest[1] = n_foreign.param1;
}
else
{
dest[0] = actual_param0;
dest[1] = n_foreign.param1;
dest[2] = n_foreign.param2;
}
}
void MapNode::deSerialize_pre22(u8 *source, u8 version)
{
if(version <= 1)
{
param0 = source[0];
}
else if(version <= 9)
{
param0 = source[0];
param1 = source[1];
}
else
{
param0 = source[0];
param1 = source[1];
param2 = source[2];
}
// Convert special values from old version to new
if(version <= 19)
{
// In these versions, CONTENT_IGNORE and CONTENT_AIR
// are 255 and 254
// Version 19 is fucked up with sometimes the old values and sometimes not
if(param0 == 255)
param0 = CONTENT_IGNORE;
else if(param0 == 254)
param0 = CONTENT_AIR;
}
// Translate to our known version
*this = mapnode_translate_to_internal(*this, version);
}