/// <summary>
/// 在<see cref="srcFigures"/>中过滤出和<see cref="sampleFigure"/>匹配的所有图元
/// </summary>
/// <param name="srcFigures"></param>
/// <param name="sampleFigure"></param>
/// <returns></returns>
public List <vdFigure> Filter(List <vdFigure> srcFigures, vdFigure sampleFigure)
{
if (srcFigures == null || srcFigures.Count == 0)
{
throw new ArgumentNullException(nameof(srcFigures));
}
if (sampleFigure == null)
{
throw new ArgumentNullException(nameof(sampleFigure));
}
var passedSet = new List <vdFigure>();
var sampleType = sampleFigure.GetType();
foreach (vdFigure srcFigure in srcFigures)
{
if (srcFigure.GetType() != sampleType)
{
continue;
}
if (srcFigure == sampleFigure)
{
continue;
}
if (PreFilterFunc != null && !PreFilterFunc.Invoke(srcFigure, sampleFigure))
{
continue;
}
if (FilterItem(srcFigure, sampleFigure))
{
passedSet.Add(srcFigure);
}
}
return(passedSet);
}
private vdFigure FilterFigure(List <vdFigure> srcFigures, vdFigure srcMajor, vdFigure sampleFigure, vdFigure sampleMajor)
{
var sampleFigureType = sampleFigure.GetType();
var sampleFigureOffsetLenSquared = sampleFigure.BoundingBox.MidPoint.DistanceSquared(sampleMajor.BoundingBox.MidPoint);
for (var i = 0; i < srcFigures.Count; i++)
{
var srcfigure = srcFigures[i];
if (srcfigure == srcMajor)
{
continue;
}
if (srcfigure.GetType() != sampleFigureType)
{
continue;
}
var offset = srcfigure.BoundingBox.MidPoint - srcMajor.BoundingBox.MidPoint;
if (Math.Abs(offset.x * offset.x + offset.y * offset.y - sampleFigureOffsetLenSquared) >= 2)
{
continue;
}
var filter = FilterFactory.Get(sampleFigureType);
if (filter != null)
{
if (filter.IsMatchable(srcfigure, sampleFigure))
{
return(srcfigure);
}
}
}
return(null);
}
/// <summary>
/// 判断两个图元是否匹配
/// </summary>
/// <param name="figure1"></param>
/// <param name="figure2"></param>
/// <returns></returns>
public bool IsMatchable(vdFigure figure1, vdFigure figure2)
{
if (figure1.GetType() != figure2.GetType())
{
return(false);
}
if (PreFilterFunc != null && !PreFilterFunc.Invoke(figure1, figure2))
{
return(false);
}
return(FilterItem(figure1, figure2));
}
