public void setPathDir(int _now_pre, int _next_now)
{
// _now_pre == nowIDX - preIDX
switch (_now_pre)
{
case 1:
previousPathDir = PathDir.LEFT;
break;
case -1:
previousPathDir = PathDir.RIGHT;
break;
default: // UP or DOWN
if (_now_pre > 0)
{
previousPathDir = PathDir.UP;
}
else
{
previousPathDir = PathDir.DOWN;
}
break;
}
// _next_now == nextIDX - nowIDX
switch (_next_now)
{
case 1:
nextPathDir = PathDir.RIGHT;
break;
case -1:
nextPathDir = PathDir.LEFT;
break;
default:
if (_next_now > 0)
{
nextPathDir = PathDir.DOWN;
}
else
{
nextPathDir = PathDir.UP;
}
break;
}
}
private int getAdjacent(int pos, PathDir dir)
{
int tmpPos = -1;
switch (dir)
{
case PathDir.LT:
if (0 == pos % _row || 0 == pos / _row)
{
return(-1);
}
tmpPos = pos - _row - 1;
break;
case PathDir.T:
if (0 == pos % _row)
{
return(-1);
}
tmpPos = pos - 1;
break;
case PathDir.RT:
if (0 == pos % _row || _column - 1 == pos / _row)
{
return(-1);
}
tmpPos = pos + _row - 1;
break;
case PathDir.L:
if (0 == pos / _row)
{
return(-1);
}
tmpPos = pos - _row;
break;
case PathDir.R:
if (_column - 1 == pos / _row)
{
return(-1);
}
tmpPos = pos + _row;
break;
case PathDir.LB:
if (_row - 1 == pos % _row || 0 == pos / _row)
{
return(-1);
}
tmpPos = pos - _row + 1;
break;
case PathDir.B:
if (_row - 1 == pos % _row)
{
return(-1);
}
tmpPos = pos + 1;
break;
case PathDir.RB:
if (_row - 1 == pos % _row || _column - 1 == pos / _row)
{
return(-1);
}
tmpPos = pos + _row + 1;
break;
}
if (tmpPos < 0 || tmpPos >= _total)
{
return(-1);
}
else
{
return(tmpPos);
}
}
