/// <summary>
/// 清理无效的格线
/// 有时候表格里会有非格线的直线或多段线（比如钢筋图样），需要清理掉
/// 清理的原则是要求格线的头或尾，必须在某个正交方向的格线上
/// </summary>
private void CleanLines()
{
//清理横线
AcTableLine preHLine = null;
foreach (AcTableLine hLine in _tableHLines.ToArray())
{
hLine.CrossPointCount = 0;
foreach (AcTableLine vLine in _tableVLines)
{
Point2d pt = new Point2d(vLine.XorY, hLine.XorY);
if (hLine.HasSegmentOn(pt, _tolerance) && vLine.HasSegmentOn(pt, _tolerance))
{
hLine.CrossPointCount += 1;
}
}
if (hLine.CrossPointCount <= 1)
{
_tableHLines.Remove(hLine);
}
else if (preHLine != null && preHLine.XorY - hLine.XorY <= _tolerance) //表格容错，挨的太近的格线，删除掉一根交叉点小的
{
//string s = string.Format("{0:f3},{1:f3},{2:f3},{3:f3}", preHLine.XorY, hLine.XorY, preHLine.XorY - hLine.XorY, _tolerance);
//System.Windows.Forms.MessageBox.Show(s);
if (preHLine.CrossPointCount < hLine.CrossPointCount)
{
_tableHLines.Remove(preHLine);
preHLine = hLine;
}
else
{
_tableHLines.Remove(hLine);
}
}
else
{
preHLine = hLine;
}
}
//清理竖线
AcTableLine preVLine = null;
foreach (AcTableLine vLine in _tableVLines.ToArray())
{
vLine.CrossPointCount = 0;
foreach (AcTableLine hLine in _tableHLines)
{
Point2d pt = new Point2d(vLine.XorY, hLine.XorY);
if (hLine.HasSegmentOn(pt, _tolerance) && vLine.HasSegmentOn(pt, _tolerance))
{
vLine.CrossPointCount += 1;
}
}
if (vLine.CrossPointCount <= 1)
{
_tableVLines.Remove(vLine);
}
else if (preVLine != null && vLine.XorY - preVLine.XorY < _tolerance) //表格容错，挨的太近的格线，删除掉一根交叉点小的
{
if (preVLine.CrossPointCount < vLine.CrossPointCount)
{
_tableVLines.Remove(preVLine);
preVLine = vLine;
}
else
{
_tableVLines.Remove(vLine);
}
}
else
{
preVLine = vLine;
}
}
//有时候表格会有双层外框，清理外层
if (_tableHLines.Count > 2 || _tableVLines.Count > 2)
{
if (_tableHLines[0].CrossPointCount <= 2 &&
_tableHLines.Last().CrossPointCount <= 2 &&
_tableVLines[0].CrossPointCount <= 2 &&
_tableVLines.Last().CrossPointCount <= 2)
{
_tableHLines.RemoveAt(0);
_tableHLines.RemoveAt(_tableHLines.Count - 1);
_tableVLines.RemoveAt(0);
_tableVLines.RemoveAt(_tableVLines.Count - 1);
}
}
//清理只有2个交点并且不等于表格宽和高的格线
double tableWidth = _tableHLines.Max(line => line.Length);
foreach (AcTableLine hLine in _tableHLines.ToArray())
{
if (hLine.CrossPointCount <= 2 && CommandUtils.Compare(hLine.Length, tableWidth) < 0)
{
//System.Windows.Forms.MessageBox.Show(hLine.Length.ToString());
_tableHLines.Remove(hLine);
}
}
double tableHeight = _tableVLines.Max(line => line.Length);
foreach (AcTableLine vLine in _tableVLines.ToArray())
{
if (vLine.CrossPointCount <= 2 && CommandUtils.Compare(vLine.Length, tableHeight) < 0)
{
_tableVLines.Remove(vLine);
}
}
}