public static int Distance(LogicHex a, LogicHex b)
{
return(b.Sub(a).Length());
}
public static void Line(LogicHexMap map, LogicHex a, LogicHex b, int value)
{
map.Set(a, value);
if (a.Equals(b))
{
return;
}
LogicHex diff = b.Sub(a);
int absQ = LogicMath.abs(diff.q);
int absR = LogicMath.abs(diff.r);
int absS = LogicMath.abs(diff.s);
bool flip = false;
int longDistance;
int shortDistance;
int longQ, longR, shortQ, shortR;
if (absQ > absR)
{
if (absR > absS)
{
//q,r,s
flip = diff.q < 0;
longDistance = absR;
shortDistance = absS;
longQ = 1;
longR = -1;
shortQ = 1;
shortR = 0;
}
else
{
if (absS > absQ)
{
//s,q,r
flip = diff.s < 0;
longDistance = absQ;
shortDistance = absR;
longQ = -1;
longR = 0;
shortQ = 0;
shortR = -1;
}
else
{
//q,s,r
flip = diff.q < 0;
longDistance = absS;
shortDistance = absR;
longQ = 1;
longR = 0;
shortQ = 1;
shortR = -1;
}
}
}
else
{
if (absR > absS)
{
if (absS > absQ)
{
//r,s,q
flip = diff.r < 0;
longDistance = absS;
shortDistance = absQ;
longQ = 0;
longR = 1;
shortQ = -1;
shortR = 1;
}
else
{
//r,q,s
flip = diff.r < 0;
longDistance = absQ;
shortDistance = absS;
longQ = -1;
longR = 1;
shortQ = 0;
shortR = 1;
}
}
else
{
//s,r,q
flip = diff.s < 0;
longDistance = absR;
shortDistance = absQ;
longQ = 0;
longR = -1;
shortQ = -1;
shortR = 0;
}
}
if (flip)
{
longQ = -longQ;
longR = -longR;
shortQ = -shortQ;
shortR = -shortR;
}
int q = a.q;
int r = a.r;
int distance = longDistance + shortDistance;
int bias = shortDistance - longDistance;
int longBiasStep = -2 * longDistance;
int shortBiasStep = 2 * shortDistance;
for (int i = 0; i < distance; ++i)
{
/*if (bias == 0)
* {
* //This is the case when we hit right between two hex tiles.
* //Depending on the use case you might want to:
* //- Draw either
* //- Draw both
* //- Draw neither
* //- Bias axis direction so that a => b is allways same as b => a
* // Here I have chosen to just prioritice shortAxes
* }*/
if (bias > 0)
{
bias += longBiasStep;
q += shortQ;
r += shortR;
}
else
{
bias += shortBiasStep;
q += longQ;
r += longR;
}
map.Set(q, r, value);
}
}