public bool JoinIfAble(LineBlock other, out LineBlock joined)
{
// if appendable
var sameDirection = Vector2.Angle(_direction, other._direction) <= 0;
if (sameDirection)
{
if (Start == other.End)
{
joined = new LineBlock(other.Start, End);
return(true);
}
if (End == other.Start)
{
joined = new LineBlock(Start, other.End);
return(true);
}
}
// if totally blocked
var isThisShorter = _angle < other._angle;
var longer = isThisShorter ? other : this;
var shorter = isThisShorter ? this : other;
if (longer.IsBlocking(shorter.Start) && longer.IsBlocking(shorter.End))
{
joined = longer;
return(true);
}
// not joined, useless
joined = this;
return(false);
}
public void AddLineBlock(LineBlock lineBlock)
{
var newLineBlock = lineBlock;
for (var i = 0; i < _lineBlocks.Count; i++)
{
var block = _lineBlocks[i];
if (!block.JoinIfAble(newLineBlock, out var joined))
{
continue;
}
_lineBlocks.RemoveAt(i);
i--;
MinusPointCount(newLineBlock.Start);
MinusPointCount(newLineBlock.End);
newLineBlock = joined;
}
_lineBlocks.Add(newLineBlock);
PlusPointCount(newLineBlock.Start);
PlusPointCount(newLineBlock.End);
}