X-Git-Url: http://git.megacz.com/?p=anneal.git;a=blobdiff_plain;f=src%2Fedu%2Fberkeley%2Fqfat%2Fbind%2FHasBindingGroup.java;h=56b7d9bdacdb1412545c64f2b6ebf9ec448df0f9;hp=b9b85b8a6cc21bd1e88952c7185c9ce2b6d26e69;hb=HEAD;hpb=7c73c0f732bbadef09d098b7f4542b060fdacc7d

diff --git a/src/edu/berkeley/qfat/bind/HasBindingGroup.java b/src/edu/berkeley/qfat/bind/HasBindingGroup.java
index b9b85b8..56b7d9b 100644
--- a/src/edu/berkeley/qfat/bind/HasBindingGroup.java
+++ b/src/edu/berkeley/qfat/bind/HasBindingGroup.java
@@ -32,6 +32,13 @@ public abstract class HasBindingGroup {
         if (bindingGroup == null) bindingGroup = new BindingGroup(this);
         if (other.bindingGroup == null) other.bindingGroup = new BindingGroup(other);
 
+        //                            this  =                         bg.getMatrix(this)   * bg.master
+        //                            other =                         obg.getMatrix(other) * obg.master
+        //                            this  =                         bindingMatrix        * other
+        //                            this  =                         bindingMatrix        * obg.getMatrix(other) * obg.master
+        // bg.getMatrix(this)  * bg.master  =                         bindingMatrix        * obg.getMatrix(other) * obg.master
+        //                       bg.master  = bg.getMatrix(this)^-1 * bindingMatrix        * obg.getMatrix(other) * obg.master
+        // bg.master = XXX * obg.master
         Matrix bm = bindingGroup.getMatrix(this);
         Matrix obm = other.bindingGroup.getMatrix(other);
         bindingMatrix =
@@ -49,7 +56,7 @@ public abstract class HasBindingGroup {
 
     /** returns the AffineConstraint of this BG, translated into this HBG's space */
     public AffineConstraint getBindingConstraint() {
-        if (bindingGroup==null) return new AffineConstraint.All();
+        if (bindingGroup==null) return AffineConstraint.ALL;
         return bindingGroup.getAffineConstraint(this);
     }
 
@@ -81,4 +88,10 @@ public abstract class HasBindingGroup {
     /** invoked after the binding group of this HBG has changed due to bindTo() or unbind() */
     public void bindingGroupChanged() {
     }
+
+    public boolean bindingGroupUnconstrained() {
+        if (bindingGroupSize() > 1) return false;
+        if (getBindingConstraint()!=AffineConstraint.ALL) return false;
+        return true;
+    }
 }