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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 <iostream>
#include "debug.h"
#include "mapnode.h"
// For VC++
#undef min
#undef max
/*
A fast voxel manipulator class.
In normal operation, it fetches more map when it is requested.
It can also be used so that all allowed area is fetched at the
start, using ManualMapVoxelManipulator.
Not thread-safe.
*/
/*
Debug stuff
*/
extern u32 emerge_time;
extern u32 emerge_load_time;
/*
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)
{
}
/*
Modifying methods
*/
void addArea(VoxelArea &a)
{
if(getExtent() == v3s16(0,0,0))
{
*this = a;
return;
}
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(getExtent() == v3s16(0,0,0))
{
MinEdge = p;
MaxEdge = p;
return;
}
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;
}
// Pad with d nodes
void pad(v3s16 d)
{
MinEdge -= d;
MaxEdge += d;
}
/*void operator+=(v3s16 off)
{
MinEdge += off;
MaxEdge += off;
}
void operator-=(v3s16 off)
{
MinEdge -= off;
MaxEdge -= off;
}*/
/*
const methods
*/
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(const VoxelArea &a) const
{
// No area contains an empty area
// NOTE: Algorithms depend on this, so do not change.
if(a.getExtent() == v3s16(0,0,0))
return false;
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 contains(s32 i) const
{
return (i >= 0 && i < getVolume());
}
bool operator==(const VoxelArea &other) const
{
return (MinEdge == other.MinEdge
&& MaxEdge == other.MaxEdge);
}
VoxelArea operator+(v3s16 off) const
{
return VoxelArea(MinEdge+off, MaxEdge+off);
}
VoxelArea operator-(v3s16 off) const
{
return VoxelArea(MinEdge-off, MaxEdge-off);
}
/*
Returns 0-6 non-overlapping areas that can be added to
a to make up this area.
a: area inside *this
*/
void diff(const VoxelArea &a, core::list<VoxelArea> &result)
{
/*
This can result in a maximum of 6 areas
*/
// If a is an empty area, return the current area as a whole
if(a.getExtent() == v3s16(0,0,0))
{
VoxelArea b = *this;
if(b.getVolume() != 0)
result.push_back(b);
return;
}
assert(contains(a));
// Take back area, XY inclusive
{
v3s16 min(MinEdge.X, MinEdge.Y, a.MaxEdge.Z+1);
v3s16 max(MaxEdge.X, MaxEdge.Y, MaxEdge.Z);
VoxelArea b(min, max);
if(b.getVolume() != 0)
result.push_back(b);
}
// Take front area, XY inclusive
{
v3s16 min(MinEdge.X, MinEdge.Y, MinEdge.Z);
v3s16 max(MaxEdge.X, MaxEdge.Y, a.MinEdge.Z-1);
VoxelArea b(min, max);
if(b.getVolume() != 0)
result.push_back(b);
}
// Take top area, X inclusive
{
v3s16 min(MinEdge.X, a.MaxEdge.Y+1, a.MinEdge.Z);
v3s16 max(MaxEdge.X, MaxEdge.Y, a.MaxEdge.Z);
VoxelArea b(min, max);
if(b.getVolume() != 0)
result.push_back(b);
}
// Take bottom area, X inclusive
{
v3s16 min(MinEdge.X, MinEdge.Y, a.MinEdge.Z);
v3s16 max(MaxEdge.X, a.MinEdge.Y-1, a.MaxEdge.Z);
VoxelArea b(min, max);
if(b.getVolume() != 0)
result.push_back(b);
}
// Take left area, non-inclusive
{
v3s16 min(MinEdge.X, a.MinEdge.Y, a.MinEdge.Z);
v3s16 max(a.MinEdge.X-1, a.MaxEdge.Y, a.MaxEdge.Z);
VoxelArea b(min, max);
if(b.getVolume() != 0)
result.push_back(b);
}
// Take right area, non-inclusive
{
v3s16 min(a.MaxEdge.X+1, a.MinEdge.Y, a.MinEdge.Z);
v3s16 max(MaxEdge.X, a.MaxEdge.Y, a.MaxEdge.Z);
VoxelArea b(min, max);
if(b.getVolume() != 0)
result.push_back(b);
}
}
/*
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);
}
// Translate index in the X coordinate
void add_x(const v3s16 &extent, u32 &i, s16 a)
{
i += a;
}
// Translate index in the Y coordinate
void add_y(const v3s16 &extent, u32 &i, s16 a)
{
i += a * extent.X;
}
// Translate index in the Z coordinate
void add_z(const v3s16 &extent, u32 &i, s16 a)
{
i += a * extent.X*extent.Y;
}
// Translate index in space
void add_p(const v3s16 &extent, u32 &i, v3s16 a)
{
i += a.Z*extent.X*extent.Y + a.Y*extent.X + a.X;
}
/*
Print method for debugging
*/
void print(std::ostream &o) const
{
v3s16 e = getExtent();
o<<"("<<MinEdge.X
<<","<<MinEdge.Y
<<","<<MinEdge.Z
<<")("<<MaxEdge.X
<<","<<MaxEdge.Y
<<","<<MaxEdge.Z
<<")"
<<"="<<e.X<<"x"<<e.Y<<"x"<<e.Z<<"="<<getVolume();
}
// 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_CHECKED1 (1<<2)
// Algorithm-dependent
#define VOXELFLAG_CHECKED2 (1<<3)
// Algorithm-dependent
#define VOXELFLAG_CHECKED3 (1<<4)
// Algorithm-dependent
#define VOXELFLAG_CHECKED4 (1<<5)
enum VoxelPrintMode
{
VOXELPRINT_NOTHING,
VOXELPRINT_MATERIAL,
VOXELPRINT_WATERPRESSURE,
};
class VoxelManipulator /*: public NodeContainer*/
{
public:
VoxelManipulator();
virtual ~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.
Use m_data[m_area.index(p)] instead.
|
