checkpoint

[anneal.git] / src / edu / berkeley / qfat / geom / HasBindingGroup.java

diff --git a/src/edu/berkeley/qfat/geom/HasBindingGroup.java b/src/edu/berkeley/qfat/geom/HasBindingGroup.java
index cf72a08..1c3737a 100644 (file)
--- a/src/edu/berkeley/qfat/geom/HasBindingGroup.java
+++ b/src/edu/berkeley/qfat/geom/HasBindingGroup.java
@@ -11,9 +11,14 @@ public abstract class HasBindingGroup {
     // want:      self   = bindingMatrix * other
     // therefore: master = bindingGroup[self]^-1 * bindingMatrix * other
     // therefore:        = bindingGroup[self]^-1 * bindingMatrix * other.bindingGroup[other] * other.bindingGroup.master
-    public void bindTo(HasBindingGroup other, Matrix bindingMatrix) {
-        if (other.bindingGroup == this.bindingGroup)
-            throw new Error("rebind attempt");
+    public void bindTo(Matrix bindingMatrix, HasBindingGroup other) {
+        if (bindingGroup == null) bindingGroup = new BindingGroup(this);
+        if (other.bindingGroup == null) other.bindingGroup = new BindingGroup(other);
+
+        if (other.bindingGroup == this.bindingGroup) {
+            if (bindingGroup.getMatrix(other).equals(Matrix.ONE)) return;
+            throw new Error("rebind attempt with " + bindingGroup.getMatrix(other));
+        }
 
         bindingMatrix =
             getBindingMatrix()
@@ -23,11 +28,24 @@ public abstract class HasBindingGroup {
     }
 
     public Matrix getBindingMatrix() {
+        if (bindingGroup==null) return Matrix.ONE;
         return bindingGroup.getMatrix(this);
     }
 
     public HasBindingGroup getMaster() {
+        if (bindingGroup==null) return this;
         return bindingGroup.getMaster();
     }
 
+    public void unbind() {
+        if (bindingGroup==null) return;
+        bindingGroup.unbind(this);
+        bindingGroup = null;
+    }
+
+    public boolean isBoundTo(HasBindingGroup t) {
+        return bindingGroup.contains(t);
+    }
+
+    public Iterable getBoundPeers() { return bindingGroup; }
 }