public abstract class HasBindingGroup {
- BindingGroup bindingGroup;
+ public BindingGroup bindingGroup;
// know: self = bindingGroup[self] * master
// know: other = other.bindingGroup[other] * other.bindingGroup.master
// 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));
+ */
+ Matrix vom = other.getBindingMatrix(bindingGroup.getMaster());
+ Matrix v2 = bindingMatrix;
+ Matrix v3 = getBindingMatrix(other);
+ Matrix m = vom.inverse().times(v2.inverse()).times(v3).times(vom);
+ bindingGroup.krank = bindingGroup.krank.times(m);
+ /*
+ System.err.println("WARNING: discarding rebind attempt: "+this+" and "+other+m);
+ */
+ //" with "
+ //+ bindingMatrix
+ //+ "; expected "
+ //+ getBindingMatrix(other));
+ return;
+ }
+
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) { }
}