return (float)total;
}
- public class BindingGroup {
- public HashSet<E> es = new HashSet<E>();
- public BindingGroup() { }
- public BindingGroup(E e) {
- es.add(e);
- }
- public void add(E e) {
- if (e.bg != null) { merge(e.bg); return; }
- es.add(e);
- e.bg = this;
- }
- public void merge(BindingGroup bg) {
- for(E e : bg.es) {
- e.bg = null;
- add(e);
- }
- }
- }
-
public void rebuildPointSet() { pointset.rebuild(); }
public Vec diagonal() { return pointset.diagonal(); }
public Point centroid() { return pointset.centroid(); }
}
}
+ public class BindingGroup {
+ private HashSet<E> left = new HashSet<E>();
+ private HashSet<E> right = new HashSet<E>();
+ public BindingGroup() { }
+ public BindingGroup(E e) {
+ left.add(e);
+ }
+ public void add(E e) {
+ if (e.bg != null) {
+ if (e.bg == this) return;
+ for(E ex : e.bg.left) {
+ ex.bg = this;
+ left.add(ex);
+ }
+ for(E ex : e.bg.right) {
+ ex.bg = this;
+ right.add(ex);
+ }
+ } else {
+ left.add(e);
+ e.bg = this;
+ }
+ }
+ public void dobind(E e) {
+ // assumes e is part of the "left" set
+ for(E ex : left) {
+ if (ex==e) continue;
+ e.p1.bind(ex.p1);
+ e.p2.bind(ex.p2);
+ }
+ for(E ex : right) {
+ if (ex==e) continue;
+ e.p1.bind(ex.pair.p1);
+ e.p2.bind(ex.pair.p2);
+ }
+ }
+ public void shatter(BindingGroup bg1, BindingGroup bg2) {
+ for(E e : left) {
+ e.shatter(e.midpoint(), bg1, bg2);
+ }
+ for(E e : right) {
+ e.shatter(e.midpoint(), bg2, bg1); /* swap correct? */
+ }
+ }
+ }
+
/** [UNIQUE] an edge */
public final class E implements Comparable<E> {
public int compareTo(E e) { return e.length() > length() ? 1 : -1; }
- public void bind(E e) { bind(e, new Matrix()); }
- public void bind(E e, Matrix m) { e.bg.add(this); }
-
- public void dobind() {
- if (bg==null) return;
- for(E ex : bg.es) {
- if (ex==this) continue;
- p1.bind(ex.p1);
- p2.bind(ex.p2);
- }
+ public void bindEdge(E e) {
+ e.pair.bg.add(this);
}
+ public void dobind() { if (bg != null) bg.dobind(this); }
public Point shatter() { return shatter(midpoint(), null, null); }
public Point shatter(Point mid, BindingGroup bg1, BindingGroup bg2) {
if (bg1==null) bg1 = new BindingGroup();
if (bg2==null) bg2 = new BindingGroup();
- for(E e : bg.es) e.shatter(e.midpoint(), bg1, bg2);
+ bg.shatter(bg1, bg2);
pair.shatter();
destroy();