minetest/src/voxel.cpp
2010-11-29 10:57:05 +02:00

305 lines
6.0 KiB
C++

#include "voxel.h"
#include "map.h"
VoxelManipulator::VoxelManipulator():
m_data(NULL)
{
}
VoxelManipulator::~VoxelManipulator()
{
if(m_data)
delete[] m_data;
}
void VoxelManipulator::addArea(VoxelArea area)
{
if(area.getExtent() == v3s16(0,0,0))
return;
// Calculate new area
VoxelArea new_area;
if(m_area.getExtent() == v3s16(0,0,0))
{
new_area = area;
}
else
{
new_area = m_area;
new_area.addArea(area);
}
if(new_area == m_area)
return;
s32 new_size = new_area.getVolume();
/*dstream<<"adding area ";
area.print(dstream);
dstream<<", old area ";
m_area.print(dstream);
dstream<<", new area ";
new_area.print(dstream);
dstream<<", new_size="<<new_size;
dstream<<std::endl;*/
// Allocate and clear new data
MapNode *new_data;
new_data = new MapNode[new_size];
for(s32 i=0; i<new_size; i++)
{
new_data[i].d = MATERIAL_IGNORE;
}
// Copy old data
for(s32 z=m_area.MinEdge.Z; z<=m_area.MaxEdge.Z; z++)
for(s32 y=m_area.MinEdge.Y; y<=m_area.MaxEdge.Y; y++)
for(s32 x=m_area.MinEdge.X; x<=m_area.MaxEdge.X; x++)
{
new_data[new_area.index(z,y,x)] = m_data[m_area.index(x,y,z)];
}
// Replace member
m_area = new_area;
MapNode *old_data = m_data;
m_data = new_data;
delete[] old_data;
}
void VoxelManipulator::print(std::ostream &o)
{
v3s16 em = m_area.getExtent();
v3s16 of = m_area.MinEdge;
o<<"size: "<<em.X<<"x"<<em.Y<<"x"<<em.Z
<<" offset: ("<<of.X<<","<<of.Y<<","<<of.Z<<")"<<std::endl;
for(s32 y=m_area.MinEdge.Y; y<=m_area.MaxEdge.Y; y++)
{
if(em.X >= 3 && em.Y >= 3)
{
if(y==m_area.MinEdge.Y+0) o<<"y x-> ";
if(y==m_area.MinEdge.Y+1) o<<"| ";
if(y==m_area.MinEdge.Y+2) o<<"V ";
}
for(s32 z=m_area.MinEdge.Z; z<=m_area.MaxEdge.Z; z++)
{
for(s32 x=m_area.MinEdge.X; x<=m_area.MaxEdge.X; x++)
{
u8 m = m_data[m_area.index(x,y,z)].d;
char c = 'X';
if(m == MATERIAL_IGNORE)
c = 'I';
else if(m <= 9)
c = m + '0';
o<<c;
}
o<<' ';
}
o<<std::endl;
}
}
void VoxelManipulator::interpolate(VoxelArea area)
{
VoxelArea emerge_area = area;
emerge_area.MinEdge -= v3s16(1,1,1);
emerge_area.MaxEdge += v3s16(1,1,1);
emerge(emerge_area);
SharedBuffer<u8> buf(area.getVolume());
for(s32 z=area.MinEdge.Z; z<=area.MaxEdge.Z; z++)
for(s32 y=area.MinEdge.Y; y<=area.MaxEdge.Y; y++)
for(s32 x=area.MinEdge.X; x<=area.MaxEdge.X; x++)
{
v3s16 p(x,y,z);
v3s16 dirs[] = {
v3s16(1,1,0),
v3s16(1,0,1),
v3s16(1,-1,0),
v3s16(1,0,-1),
v3s16(-1,1,0),
v3s16(-1,0,1),
v3s16(-1,-1,0),
v3s16(-1,0,-1),
};
//const v3s16 *dirs = g_26dirs;
s16 total = 0;
s16 airness = 0;
u8 m = MATERIAL_IGNORE;
for(s16 i=0; i<8; i++)
//for(s16 i=0; i<26; i++)
{
v3s16 p2 = p + dirs[i];
MapNode &n = m_data[m_area.index(p2)];
if(n.d == MATERIAL_IGNORE)
continue;
airness += (n.d == MATERIAL_AIR) ? 1 : -1;
total++;
if(m == MATERIAL_IGNORE && n.d != MATERIAL_AIR)
m = n.d;
}
// 1 if air, 0 if not
buf[area.index(p)] = airness > -total/2 ? MATERIAL_AIR : m;
//buf[area.index(p)] = airness > -total ? MATERIAL_AIR : m;
//buf[area.index(p)] = airness >= -7 ? MATERIAL_AIR : m;
}
for(s32 z=area.MinEdge.Z; z<=area.MaxEdge.Z; z++)
for(s32 y=area.MinEdge.Y; y<=area.MaxEdge.Y; y++)
for(s32 x=area.MinEdge.X; x<=area.MaxEdge.X; x++)
{
v3s16 p(x,y,z);
m_data[m_area.index(p)].d = buf[area.index(p)];
}
}
#if 0
void VoxelManipulator::blitFromNodeContainer
(v3s16 p_from, v3s16 p_to, v3s16 size, NodeContainer *c)
{
VoxelArea a_to(p_to, p_to+size-v3s16(1,1,1));
addArea(a_to);
for(s16 z=0; z<size.Z; z++)
for(s16 y=0; y<size.Y; y++)
for(s16 x=0; x<size.X; x++)
{
v3s16 p(x,y,z);
try{
MapNode n = c->getNode(p_from + p);
m_data[m_area.index(p_to + p)] = n;
}
catch(InvalidPositionException &e)
{
}
/*v3s16 p(x,y,z);
MapNode n(MATERIAL_IGNORE);
try{
n = c->getNode(p_from + p);
}
catch(InvalidPositionException &e)
{
}
m_data[m_area.index(p_to + p)] = n;*/
}
}
void VoxelManipulator::blitToNodeContainer
(v3s16 p_from, v3s16 p_to, v3s16 size, NodeContainer *c)
{
for(s16 z=0; z<size.Z; z++)
for(s16 y=0; y<size.Y; y++)
for(s16 x=0; x<size.X; x++)
{
v3s16 p(x,y,z);
try{
MapNode &n = m_data[m_area.index(p_from + p)];
if(n.d == MATERIAL_IGNORE)
continue;
c->setNode(p_to + p, n);
}
catch(InvalidPositionException &e)
{
}
}
}
#endif
/*
MapVoxelManipulator
*/
MapVoxelManipulator::MapVoxelManipulator(Map *map)
{
m_map = map;
}
void MapVoxelManipulator::emerge(VoxelArea a)
{
v3s16 size = a.getExtent();
addArea(a);
for(s16 z=0; z<size.Z; z++)
for(s16 y=0; y<size.Y; y++)
for(s16 x=0; x<size.X; x++)
{
v3s16 p(x,y,z);
try{
MapNode n = m_map->getNode(a.MinEdge + p);
m_data[m_area.index(a.MinEdge + p)] = n;
}
catch(InvalidPositionException &e)
{
}
}
}
void MapVoxelManipulator::blitBack
(core::map<v3s16, MapBlock*> & modified_blocks)
{
/*
Initialize block cache
*/
v3s16 blockpos_last;
MapBlock *block = NULL;
bool block_checked_in_modified = false;
for(s32 z=m_area.MinEdge.Z; z<=m_area.MaxEdge.Z; z++)
for(s32 y=m_area.MinEdge.Y; y<=m_area.MaxEdge.Y; y++)
for(s32 x=m_area.MinEdge.X; x<=m_area.MaxEdge.X; x++)
{
v3s16 p(x,y,z);
MapNode &n = m_data[m_area.index(p)];
if(n.d == MATERIAL_IGNORE)
continue;
v3s16 blockpos = getNodeBlockPos(p);
try
{
// Get block
if(block == NULL || blockpos != blockpos_last){
block = m_map->getBlockNoCreate(blockpos);
blockpos_last = blockpos;
block_checked_in_modified = false;
}
// Calculate relative position in block
v3s16 relpos = p - blockpos * MAP_BLOCKSIZE;
// Don't continue if nothing has changed here
if(block->getNode(relpos) == n)
continue;
//m_map->setNode(m_area.MinEdge + p, n);
block->setNode(relpos, n);
/*
Make sure block is in modified_blocks
*/
if(block_checked_in_modified == false)
{
modified_blocks[blockpos] = block;
block_checked_in_modified = true;
}
}
catch(InvalidPositionException &e)
{
}
}
}
//END