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#pragma once
/*
* float3.h, part of VCMI engine
*
* Authors: listed in file AUTHORS in main folder
*
* License: GNU General Public License v2.0 or later
* Full text of license available in license.txt file, in main folder
*
*/
// FIXME: Class doesn't contain three float values. Update name and description.
/// Class which consists of three float values. Represents position virtual RMG (0;1) area.
class float3
{
public:
float x, y;
si32 z;
float3() : x(0), y(0), z(0) {}
float3(const float X, const float Y, const si32 Z): x(X), y(Y), z(Z) {}
float3(const float3 & copy) : x(copy.x), y(copy.y), z(copy.z) {}
float3 & operator=(const float3 & copy) { x = copy.x; y = copy.y; z = copy.z; return *this; }
// returns float3 with coordinates increased by corresponding coordinate of given float3
float3 operator+(const float3 & i) const { return float3(x + i.x, y + i.y, z + i.z); }
// returns float3 with coordinates increased by given numer
float3 operator+(const float i) const { return float3(x + i, y + i, z + (si32)i); }
// returns float3 with coordinates decreased by corresponding coordinate of given float3
float3 operator-(const float3 & i) const { return float3(x - i.x, y - i.y, z - i.z); }
// returns float3 with coordinates decreased by given numer
float3 operator-(const float i) const { return float3(x - i, y - i, z - (si32)i); }
// returns float3 with plane coordinates decreased by given numer
float3 operator*(const float i) const {return float3(x * i, y * i, z);}
// returns float3 with plane coordinates decreased by given numer
float3 operator/(const float i) const {return float3(x / i, y / i, z);}
// returns opposite position
float3 operator-() const { return float3(-x, -y, -z); }
// returns squared distance on Oxy plane (z coord is not used)
double dist2dSQ(const float3 & o) const
{
const double dx = (x - o.x);
const double dy = (y - o.y);
return dx*dx + dy*dy;
}
double mag() const
{
return sqrt(x*x + y*y);
}
float3 unitVector() const
{
return float3(x, y, z) / mag();
}
// returns distance on Oxy plane (z coord is not used)
double dist2d(const float3 &other) const { return std::sqrt(dist2dSQ(other)); }
bool areNeighbours(const float3 &other) const { return (dist2dSQ(other) < 4.0) && z == other.z; }
float3& operator+=(const float3 & i)
{
x += i.x;
y += i.y;
z += i.z;
return *this;
}
float3& operator+=(const float & i)
{
x += i;
y += i;
z += (si32)i;
return *this;
}
float3& operator-=(const float3 & i)
{
x -= i.x;
y -= i.y;
z -= i.z;
return *this;
}
float3& operator-=(const float & i)
{
x += i;
y += i;
z += (si32)i;
return *this;
}
// scale on plane
float3& operator*=(const float & i)
{
x *= i;
y *= i;
return *this;
}
// scale on plane
float3& operator/=(const float & i)
{
x /= i;
y /= i;
return *this;
}
bool operator==(const float3 & i) const { return (x == i.x) && (y == i.y) && (z == i.z); }
bool operator!=(const float3 & i) const { return (x != i.x) || (y != i.y) || (z != i.z); }
bool operator<(const float3 & i) const
{
if (z<i.z)
return true;
if (z>i.z)
return false;
if (y<i.y)
return true;
if (y>i.y)
return false;
if (x<i.x)
return true;
if (x>i.x)
return false;
return false;
}
std::string operator ()() const
{
return "(" + boost::lexical_cast<std::string>(x) +
" " + boost::lexical_cast<std::string>(y) +
" " + boost::lexical_cast<std::string>(z) + ")";
}
bool valid() const
{
return z >= 0; //minimal condition that needs to be fulfilled for tiles in the map
}
template <typename Handler> void serialize(Handler &h, const float version)
{
h & x & y & z;
}
};
inline std::istream & operator>>(std::istream & str, float3 & dest)
{
return str >> dest.x >> dest.y >> dest.z;
}
inline std::ostream & operator<<(std::ostream & str, const float3 & sth)
{
return str << sth.x << ' ' << sth.y << ' ' << sth.z;
}
struct Shashfloat3
{
size_t operator()(float3 const& pos) const
{
size_t ret = std::hash<float>()(pos.x);
vstd::hash_combine(ret, pos.y);
vstd::hash_combine(ret, pos.z);
return ret;
}
};
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