// 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 (getBindingMatrix(other).equals(bindingMatrix))
+ return;
+ throw new Error("rebind attempt: "+this+" and "+other+" with "
+ + bindingMatrix
+ + "; expected "
+ + getBindingMatrix(other));
+ }
bindingMatrix =
- getBindingMatrix()
+ getBindingMatrix().inverse()
.times(bindingMatrix)
.times(other.getBindingMatrix());
other.bindingGroup.merge(bindingGroup, bindingMatrix);
}
+ public int bindingGroupSize() {
+ if (bindingGroup == null) return 1;
+ return bindingGroup.size();
+ }
+
+
public Matrix getBindingMatrix() {
+ if (bindingGroup==null) return Matrix.ONE;
return bindingGroup.getMatrix(this);
}
+ public Matrix getBindingMatrix(HasBindingGroup other) {
+ if (other==this) return Matrix.ONE;
+ return bindingGroup.getMatrix(this, other);
+ }
+
public HasBindingGroup getMaster() {
+ if (bindingGroup==null) return this;
return bindingGroup.getMaster();
}
+ public void unbind() {
+ if (bindingGroup==null) return;
+ bindingGroup.unbind(this);
+ bindingGroup = null;
+ bindingGroupChanged(bindingGroup);
+ }
+
+ public boolean isBoundTo(HasBindingGroup t) {
+ return t==this || (bindingGroup!=null && bindingGroup.contains(t));
+ }
+
+ public Iterable getBoundPeers() {
+ if (bindingGroup==null) bindingGroup = new BindingGroup(this);
+ return bindingGroup;
+ }
+ public void bindingGroupChanged(BindingGroup newBindingGroup) { }
}