import javax.media.opengl.*;
import java.util.*;
+/** tracks an equivalence class of geometric objects which are related to each other by transformation matrices */
public class BindingGroup<T extends HasBindingGroup> implements Iterable<T> {
- private T master = null;
- private HashMap<T,Matrix> matrices = new HashMap<T,Matrix>();
+ private T master = null;
+ private AffineConstraint constraint = new AffineConstraint.All();
+ private HashMap<T,Matrix> matrices = new HashMap<T,Matrix>();
public BindingGroup(T master) {
this.master = master;
matrices.put(master, Matrix.ONE);
}
+ public int size() { return matrices.size(); }
+
public void merge(BindingGroup<T> bg, Matrix m) {
+ if (bg==this) {
+ if (m.equalsModuloEpsilon(Matrix.ONE, 0.001f)) return;
+ System.err.println(m.getAffineConstraint(0.001f));
+ return;
+ }
+
for(HasBindingGroup hbg : bg.matrices.keySet()) {
matrices.put((T)hbg, bg.matrices.get(hbg).times(m));
hbg.bindingGroup = this;
}
+
+ // FIXME: what if points do not fall on the merged constraint-line?
+ AffineConstraint ac = bg.constraint.multiply(getMatrix(master, bg.master));
+ constraint = constraint.intersect(ac, 0.001f);
+
+ HashSet<HasBindingGroup> stuff = new HashSet<HasBindingGroup>();
+ for(HasBindingGroup hbg : bg.matrices.keySet())
+ stuff.add(hbg);
bg.matrices.clear();
bg.master = null;
+ for(HasBindingGroup hbg : stuff)
+ hbg.bindingGroupChanged(this);
}
- public T getMaster() { return master; }
public Matrix getMatrix(T t) { return matrices.get(t); }
public Iterator<T> iterator() { return matrices.keySet().iterator(); }
return getMatrix(t1).times(getMatrix(t2).inverse());
}
+ public AffineConstraint getConstraint(T t) {
+ return constraint.multiply(matrices.get(t));
+ }
+
public void unbind(T trem) {
if (trem != master) {
matrices.remove(trem);