X-Git-Url: http://git.megacz.com/?p=anneal.git;a=blobdiff_plain;f=src%2Fedu%2Fberkeley%2Fqfat%2FMesh.java;h=eecaad8d10832b7bfb5024dd4371701223cde035;hp=08d89e7a5d16f2993d7b092368e6177e3fafb089;hb=23a414f776b1e1a4761e61d159e93476fc168371;hpb=35b9db0def4913851f7515f2525cffb01a940578

diff --git a/src/edu/berkeley/qfat/Mesh.java b/src/edu/berkeley/qfat/Mesh.java
index 08d89e7..eecaad8 100644
--- a/src/edu/berkeley/qfat/Mesh.java
+++ b/src/edu/berkeley/qfat/Mesh.java
@@ -50,15 +50,14 @@ public class Mesh implements Iterable<Mesh.T> {
     public int numedges = 0;
     public float avgedge = 0;
 
-    public void unbind() {
+    public void rebindPoints() {
+        // unbind all points
         for(Mesh.T t : this) {
             t.v1().unbind();
             t.v2().unbind();
             t.v3().unbind();
         }
-    }
-
-    public void bind() {
+        // ask edges to re-implement their bindings
         for(Mesh.T t : this) {
             t.e1().dobind();
             t.e2().dobind();
@@ -66,6 +65,24 @@ public class Mesh implements Iterable<Mesh.T> {
         }
     }
 
+    public void unscore() {
+        HashSet<Vert> done = new HashSet<Vert>();
+        for(T t : this)
+            for(Vert p : new Vert[] { t.v1(), t.v2(), t.v3() }) {
+                if (done.contains(p)) continue;
+                done.add(p);
+                p.unscore();
+            }
+    }
+    public void fundamental() {
+        HashSet<Vert> done = new HashSet<Vert>();
+        for(T t : this)
+            for(Vert p : new Vert[] { t.v1(), t.v2(), t.v3() }) {
+                if (done.contains(p)) continue;
+                done.add(p);
+                p.recomputeFundamentalQuadric();
+            }
+    }
     public float rescore() {
         int num = 0;
         double dist = 0;
@@ -75,6 +92,7 @@ public class Mesh implements Iterable<Mesh.T> {
                 if (done.contains(p)) continue;
                 done.add(p);
                 p.rescore();
+                
             }
         return (float)(dist/num);
     }
@@ -125,77 +143,76 @@ public class Mesh implements Iterable<Mesh.T> {
         public Point p;
         E e;                // some edge *leaving* this point
 
+        /** the nearest vertex in the "score_against" mesh */
+        Vert   nearest_in_other_mesh;
+        /** the number of vertices in the other mesh for which this is the nearest_in_other_mesh */
+        int    quadric_count;
+        /** the total error quadric (contributions from all vertices in other mesh for which this is nearest) */
+        Matrix quadric = Matrix.ZERO;
+
         Vert bound_to = this;
-        int watch_count;
-        float watch_x;
-        float watch_y;
-        float watch_z;
-        Vert watch;
         Matrix binding = new Matrix();
         float oldscore = 0;
-        boolean inserted = false;
 
-        public Matrix quadric() {
-            Matrix m = new Matrix(0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0);
+        public Matrix errorQuadric() { return quadric; }
+        public Point getPoint() { return p; }
+        public float score() { return oldscore; }
+
+        private Matrix fundamentalQuadric = null;
+        public Matrix fundamentalQuadric() {
+            if (fundamentalQuadric == null) recomputeFundamentalQuadric();
+            return fundamentalQuadric;
+        }
+
+        private Vert(Point p) {
+            this.p = p;
+            if (pointset.get(p) != null) throw new Error();
+            pointset.add(this);
+        }
+
+        public void recomputeFundamentalQuadric() {
+            unscore();
+            Matrix m = Matrix.ZERO;
             E e = this.e;
             do {
                 T t = e.t;
                 m = m.plus(t.norm().fundamentalQuadric(t.centroid()));
                 e = e.pair.next;
             } while(e != this.e);
-            return m;
+            fundamentalQuadric = m;
+            rescore();
         }
 
-        public Point getPoint() { return p; }
-        private Vert(Point p) {
-            this.p = p;
-            if (pointset.get(p) != null) throw new Error();
-            pointset.add(this);
-        }
-        public float score() { return oldscore; }
         public void unscore() {
-            if (watch == null) return;
-            watch.watch_x -= p.x;
-            watch.watch_y -= p.y;
-            watch.watch_z -= p.z;
-            watch.watch_count--;
-            if (watch.watch_count==0) {
-                watch.watch_x = 0;
-                watch.watch_y = 0;
-                watch.watch_z = 0;
-            }
-            watch = null;
+            if (nearest_in_other_mesh == null) return;
+            if (fundamentalQuadric == null) return;
+            nearest_in_other_mesh.quadric = nearest_in_other_mesh.quadric.minus(fundamentalQuadric);
+            nearest_in_other_mesh.quadric_count--;
+            if (nearest_in_other_mesh.quadric_count==0)
+                nearest_in_other_mesh.quadric = Matrix.ZERO;
+            nearest_in_other_mesh = null;
         }
-        public Vert partner() { return watch==null ? this : watch; }
-        public Point watchback() { return watch_count==0 ? partner().p :
-                new Point(watch_x/watch_count, watch_y/watch_count, watch_z/watch_count); }
+
         public void rescore() {
             if (score_against == null) return;
 
             score -= oldscore;
             oldscore = 0;
 
-            if (watch != null) unscore();
-            Vert po = this;
-            if (watch == null) {
-                watch = score_against.nearest(po.p);
+            if (nearest_in_other_mesh != null) unscore();
+            if (nearest_in_other_mesh == null) {
+                nearest_in_other_mesh = score_against.nearest(p);
 
                 // don't attract to vertices that face the other way
-                if (watch.e == null || watch.norm().dot(norm()) < 0) {
-                    watch = null;
+                if (nearest_in_other_mesh.e == null || nearest_in_other_mesh.norm().dot(norm()) < 0) {
+                    nearest_in_other_mesh = null;
                 } else {
-                    watch.watch_x += po.p.x;
-                    watch.watch_y += po.p.y;
-                    watch.watch_z += po.p.z;
-                    watch.watch_count++;
+                    nearest_in_other_mesh.quadric = nearest_in_other_mesh.quadric.plus(fundamentalQuadric());
+                    nearest_in_other_mesh.quadric_count++;
                 }
             }
 
-            double s1, s2;
-            if (watch_count==0) s1 = 0;
-            else                s1 = p.distance(watch_x/watch_count, watch_y/watch_count, watch_z/watch_count);
-            s2 = watch==null ? 0 : po.p.distance(watch.p);
-            oldscore = (float)(s1 + s2);
+            oldscore = quadric_count == 0 ? 0 : (quadric.preAndPostMultiply(p) / quadric_count);
             score += oldscore;
         }
 
@@ -214,30 +231,18 @@ public class Mesh implements Iterable<Mesh.T> {
                 throw new RuntimeException(e);
             }
             rescore();
-            boolean good = true;
-            /*
-            for(T t : this) {
-                for(E e = this.e; ;) {
-                    if (e.intersects(t)) { good = false; break; }
-                    e = e.pair.next;
-                    if (e == this.e) break;
-                }
-            }
-            */
-            /*
-                if (t==this.t) continue;
-                if (this.intersects(t)) good = false;
-            }
-            */
-            return good;
+
+            // should recompute fundamental quadrics of all vertices sharing a face, but we defer...
+            // FIXME: intersection test needed?
+            return true;
         }
+
         public boolean move(Vec v) {
             Matrix m = new Matrix(v);
             Vert p = this;
             boolean good = true;
             do {
                 good &= p.transform(m);
-                v = v.times(binding); // bleh wrong
                 p = p.bound_to;
             } while (p != this);
             return good;
@@ -275,6 +280,16 @@ public class Mesh implements Iterable<Mesh.T> {
             return null;
         }
 
+        public Vec norm() {
+            Vec norm = new Vec(0, 0, 0);
+            E e = this.e;
+            do {
+                if (e.t != null) norm = norm.plus(e.t.norm().times((float)e.prev.angle()));
+                e = e.pair.next;
+            } while(e != this.e);
+            return norm.norm();
+        }
+
         public boolean isBoundTo(Vert p) {
             Vert px = p;
             do {
@@ -283,7 +298,6 @@ public class Mesh implements Iterable<Mesh.T> {
             } while(px != p);
             return false;
         }
-
         public void unbind() { bound_to = this; binding = new Matrix(); }
         public void bind(Vert p) { bind(p, new Matrix()); }
         public void bind(Vert p, Matrix binding) {
@@ -295,15 +309,6 @@ public class Mesh implements Iterable<Mesh.T> {
             this.bound_to = temp_bound_to;
             this.binding = temp_binding.times(temp_binding); // FIXME: may have order wrong here
         }
-        public Vec norm() {
-            Vec norm = new Vec(0, 0, 0);
-            E e = this.e;
-            do {
-                if (e.t != null) norm = norm.plus(e.t.norm().times((float)e.prev.angle()));
-                e = e.pair.next;
-            } while(e != this.e);
-            return norm.norm();
-        }
     }
 
     /** [UNIQUE] an edge */