--- /dev/null
+package edu.berkeley.qfat.bind;
+import edu.berkeley.qfat.geom.*;
+import javax.media.opengl.*;
+import java.util.*;
+import edu.berkeley.qfat.Mesh;
+
+public abstract class HasBindingGroup {
+
+ 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(Matrix bindingMatrix, HasBindingGroup other) {
+ if (bindingGroup == null) bindingGroup = new BindingGroup(this);
+ if (other.bindingGroup == null) other.bindingGroup = new BindingGroup(other);
+
+ bindingMatrix =
+ getBindingMatrix().inverse()
+ .times(bindingMatrix)
+ .times(other.getBindingMatrix());
+ other.bindingGroup.merge(bindingGroup, bindingMatrix);
+ }
+
+ public int bindingGroupSize() {
+ if (bindingGroup == null) return 1;
+ return bindingGroup.size();
+ }
+
+ public AffineConstraint getBindingConstraint() {
+ if (bindingGroup==null) return new AffineConstraint.All();
+ return bindingGroup.getConstraint(this);
+ }
+
+ 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 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) { }
+}