From 3e0fc8c7a5658abf2c460fc4eae44d137748e4e7 Mon Sep 17 00:00:00 2001
From: adam <adam@megacz.com>
Date: Wed, 5 Dec 2007 00:51:34 -0800
Subject: [PATCH] checkpoint

darcs-hash:20071205085134-5007d-aa1d0a1b2a16781177d4771df94f1091d9c7898d.gz
---
 src/edu/berkeley/qfat/Mesh.java |   31 +++++++++++++++++++++++--------
 1 file changed, 23 insertions(+), 8 deletions(-)

diff --git a/src/edu/berkeley/qfat/Mesh.java b/src/edu/berkeley/qfat/Mesh.java
index 5dd2aea..0df0072 100644
--- a/src/edu/berkeley/qfat/Mesh.java
+++ b/src/edu/berkeley/qfat/Mesh.java
@@ -319,33 +319,48 @@ public class Mesh implements Iterable<Mesh.T> {
     }
 
     public class BindingGroup {
-        private HashSet<E> ess = new HashSet<E>();
+        private HashSet<E> left = new HashSet<E>();
+        private HashSet<E> right = new HashSet<E>();
         public BindingGroup() { }
         public BindingGroup(E e) {
-            ess.add(e);
+            left.add(e);
         }
         public void add(E e) {
             if (e.bg != null) {
-                for(E ex : e.bg.ess) {
-                    ex.bg = null;
-                    add(ex);
+                if (e.bg == this) return;
+                for(E ex : e.bg.left) {
+                    ex.bg = this;
+                    left.add(ex);
+                }
+                for(E ex : e.bg.right) {
+                    ex.bg = this;
+                    right.add(ex);
                 }
             } else {
-                ess.add(e);
+                left.add(e);
                 e.bg = this;
             }
         }
         public void dobind(E e) {
-            for(E ex : ess) {
+            // assumes e is part of the "left" set
+            for(E ex : left) {
                 if (ex==e) continue;
                 e.p1.bind(ex.p1);
                 e.p2.bind(ex.p2);
             }
+            for(E ex : right) {
+                if (ex==e) continue;
+                e.p1.bind(ex.pair.p1);
+                e.p2.bind(ex.pair.p2);
+            }
         }
         public void shatter(BindingGroup bg1, BindingGroup bg2) {
-            for(E e : ess) {
+            for(E e : left) {
                 e.shatter(e.midpoint(), bg1, bg2);
             }
+            for(E e : right) {
+                e.shatter(e.midpoint(), bg2, bg1);  /* swap correct? */
+            }
         }
     }
 
-- 
1.7.10.4