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/*
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.
*/
#ifndef VOXEL_HEADER
#define VOXEL_HEADER
#include "common_irrlicht.h"
#include "mapblock.h"
#include <iostream>
/*
A fast voxel manipulator class
Not thread-safe.
*/
/*
This class resembles aabbox3d<s16> a lot, but has inclusive
edges for saner handling of integer sizes
*/
class VoxelArea
{
public:
// Starts as zero sized
VoxelArea():
MinEdge(1,1,1),
MaxEdge(0,0,0)
{
}
VoxelArea(v3s16 min_edge, v3s16 max_edge):
MinEdge(min_edge),
MaxEdge(max_edge)
{
}
VoxelArea(v3s16 p):
MinEdge(p),
MaxEdge(p)
{
}
void addArea(VoxelArea &a)
{
if(a.MinEdge.X < MinEdge.X) MinEdge.X = a.MinEdge.X;
if(a.MinEdge.Y < MinEdge.Y) MinEdge.Y = a.MinEdge.Y;
if(a.MinEdge.Z < MinEdge.Z) MinEdge.Z = a.MinEdge.Z;
if(a.MaxEdge.X > MaxEdge.X) MaxEdge.X = a.MaxEdge.X;
if(a.MaxEdge.Y > MaxEdge.Y) MaxEdge.Y = a.MaxEdge.Y;
if(a.MaxEdge.Z > MaxEdge.Z) MaxEdge.Z = a.MaxEdge.Z;
}
void addPoint(v3s16 p)
{
if(p.X < MinEdge.X) MinEdge.X = p.X;
if(p.Y < MinEdge.Y) MinEdge.Y = p.Y;
if(p.Z < MinEdge.Z) MinEdge.Z = p.Z;
if(p.X > MaxEdge.X) MaxEdge.X = p.X;
if(p.Y > MaxEdge.Y) MaxEdge.Y = p.Y;
if(p.Z > MaxEdge.Z) MaxEdge.Z = p.Z;
}
v3s16 getExtent() const
{
return MaxEdge - MinEdge + v3s16(1,1,1);
}
s32 getVolume() const
{
v3s16 e = getExtent();
return (s32)e.X * (s32)e.Y * (s32)e.Z;
}
bool contains(VoxelArea &a) const
{
return(
a.MinEdge.X >= MinEdge.X && a.MaxEdge.X <= MaxEdge.X &&
a.MinEdge.Y >= MinEdge.Y && a.MaxEdge.Y <= MaxEdge.Y &&
a.MinEdge.Z >= MinEdge.Z && a.MaxEdge.Z <= MaxEdge.Z
);
}
bool contains(v3s16 p) const
{
return(
p.X >= MinEdge.X && p.X <= MaxEdge.X &&
p.Y >= MinEdge.Y && p.Y <= MaxEdge.Y &&
p.Z >= MinEdge.Z && p.Z <= MaxEdge.Z
);
}
bool operator==(const VoxelArea &other) const
{
return (MinEdge == other.MinEdge
&& MaxEdge == other.MaxEdge);
}
/*
Translates position from virtual coordinates to array index
*/
s32 index(s16 x, s16 y, s16 z) const
{
v3s16 em = getExtent();
v3s16 off = MinEdge;
s32 i = (s32)(z-off.Z)*em.Y*em.X + (y-off.Y)*em.X + (x-off.X);
//dstream<<" i("<<x<<","<<y<<","<<z<<")="<<i<<" ";
return i;
}
s32 index(v3s16 p) const
{
return index(p.X, p.Y, p.Z);
}
void print(std::ostream &o) const
{
o<<"("<<MinEdge.X
<<","<<MinEdge.Y
<<","<<MinEdge.Z
<<")("<<MaxEdge.X
<<","<<MaxEdge.Y
<<","<<MaxEdge.Z
<<")";
}
// Edges are inclusive
v3s16 MinEdge;
v3s16 MaxEdge;
};
// Hasn't been copied from source (emerged)
#define VOXELFLAG_NOT_LOADED (1<<0)
// Checked as being inexistent in source
#define VOXELFLAG_INEXISTENT (1<<1)
// Algorithm-dependent
#define VOXELFLAG_CHECKED (1<<2)
class VoxelManipulator : public NodeContainer
{
public:
VoxelManipulator();
~VoxelManipulator();
/*
Virtuals from NodeContainer
*/
virtual u16 nodeContainerId() const
{
return NODECONTAINER_ID_VOXELMANIPULATOR;
}
bool isValidPosition(v3s16 p)
{
emerge(p);
return !(m_flags[m_area.index(p)] & VOXELFLAG_INEXISTENT);
}
// These are a bit slow and shouldn't be used internally
MapNode getNode(v3s16 p)
{
emerge(p);
if(m_flags[m_area.index(p)] & VOXELFLAG_INEXISTENT)
{
dstream<<"ERROR: VoxelManipulator::getNode(): "
<<"p=("<<p.X<<","<<p.Y<<","<<p.Z<<")"
<<", index="<<m_area.index(p)
<<", flags="<<(int)m_flags[m_area.index(p)]
<<" is inexistent"<<std::endl;
throw InvalidPositionException
("VoxelManipulator: getNode: inexistent");
}
return m_data[m_area.index(p)];
}
void setNode(v3s16 p, MapNode &n)
{
emerge(p);
m_data[m_area.index(p)] = n;
m_flags[m_area.index(p)] &= ~VOXELFLAG_INEXISTENT;
m_flags[m_area.index(p)] &= ~VOXELFLAG_NOT_LOADED;
}
void setNodeNoRef(v3s16 p, MapNode n)
{
setNode(p, n);
}
/*void setExists(VoxelArea a)
{
emerge(a);
for(s32 z=a.MinEdge.Z; z<=a.MaxEdge.Z; z++)
for(s32 y=a.MinEdge.Y; y<=a.MaxEdge.Y; y++)
for(s32 x=a.MinEdge.X; x<=a.MaxEdge.X; x++)
{
m_flags[m_area.index(x,y,z)] &= ~VOXELFLAG_INEXISTENT;
}
}*/
/*MapNode & operator[](v3s16 p)
{
//dstream<<"operator[] p=("<<p.X<<","<<p.Y<<","<<p.Z<<")"<<std::endl;
if(isValidPosition(p) == false)
emerge(VoxelArea(p));
return m_data[m_area.index(p)];
}*/
/*
Control
*/
void clear();
void print(std::ostream &o);
void addArea(VoxelArea area);
/*
Algorithms
*/
void interpolate(VoxelArea area);
void flowWater(v3s16 removed_pos);
/*
Virtual functions
*/
/*
Get the contents of the requested area from somewhere.
Shall touch only nodes that have VOXELFLAG_NOT_LOADED
Shall reset VOXELFLAG_NOT_LOADED
If not found from source, add with VOXELFLAG_INEXISTENT
*/
virtual void emerge(VoxelArea a)
{
//dstream<<"emerge p=("<<p.X<<","<<p.Y<<","<<p.Z<<")"<<std::endl;
addArea(a);
for(s32 z=a.MinEdge.Z; z<=a.MaxEdge.Z; z++)
for(s32 y=a.MinEdge.Y; y<=a.MaxEdge.Y; y++)
for(s32 x=a.MinEdge.X; x<=a.MaxEdge.X; x++)
{
s32 i = m_area.index(x,y,z);
// Don't touch nodes that have already been loaded
if(!(m_flags[i] & VOXELFLAG_NOT_LOADED))
continue;
m_flags[i] = VOXELFLAG_INEXISTENT;
}
}
/*
Member variables
*/
/*
The area that is stored in m_data.
addInternalBox should not be used if getExtent() == v3s16(0,0,0)
MaxEdge is 1 higher than maximum allowed position
*/
VoxelArea m_area;
/*
NULL if data size is 0 (extent (0,0,0))
Data is stored as [z*h*w + y*h + x]
*/
MapNode *m_data;
/*
Flags of all nodes
*/
u8 *m_flags;
private:
};
class Map;
class MapVoxelManipulator : public VoxelManipulator
{
public:
MapVoxelManipulator(Map *map);
virtual void emerge(VoxelArea a);
void blitBack(core::map<v3s16, MapBlock*> & modified_blocks);
private:
Map *m_map;
};
#endif
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