IEnumerable <string> ExportPoly(GeomPoly poly)
{
foreach (var pair in poly.arcs)
{
yield return(String.Concat(
pair.Item2 ? '-' : '+',
pair.Item1.id
));
}
}
// 简单检查多边形包含关系
// 不考虑孔洞、凹多边形等
public bool IncludeSimple(GeomPoly other)
{
foreach (var p in other.IterPoints())
{
if (!Include(p))
{
return(false);
}
}
return(true);
}
// 输出多边形内所有弧段
void DumpPoly(GeomPoly poly, bool leftInner)
{
foreach (var pair in poly.arcs)
{
bool isRight = leftInner ^ pair.Item2;
var container = isRight ? arcRight : arcLeft;
if (container.ContainsKey(pair.Item1))
{
throw new Exception("重边");
}
container[pair.Item1] = poly;
}
}