compute initial winding from projected rays

tools/pathops_sorter.htm

Index: tools/pathops_sorter.htm
diff --git a/tools/pathops_sorter.htm b/tools/pathops_sorter.htm
index c515fe9b87ab35da6ddc672f6c61d5ad85dcfa6d..03e0a98a01b0d58f149eb2b046f49bec4bfe70c5 100644
--- a/tools/pathops_sorter.htm
+++ b/tools/pathops_sorter.htm
@@ -7,8 +7,10 @@
 <div style="height:0">
 
 <div id="sect1">
-{{{2.18726921f, 2.37414956f}, {2.17974997f, 1.98023772f}, {0.0679920018f, 1.92180145f}}}
-{{{1.58881736f, 3.34967732f}, {2.89432383f, 1.86175978f}, {2.97965813f, 1.76450205f}, {-7.5f, 2}}}
+SkOpAngle::afterPart {{{3,4}, {2.87721833,4.1227816}, {2.78458726,4.17018661}, {2.72210693,4.16072464}}} id=1
+SkOpAngle::afterPart {{{3,4}, {3.00020218,3.99986529}}} id=3
+SkOpAngle::afterPart {{{3,4}, {3.00006742,3.99995506}, {3.00013476,3.99991025}, {3.00020218,3.99986529}}} id=4
+
 </div>
 
 </div>