+package edu.berkeley.qfat.geom;
+import javax.media.opengl.*;
+
+/** any object associated with a specific point in 3D space */
+public abstract class HasQuadric extends HasPoint {
+
+ public Matrix errorQuadric() { return quadric; }
+ public boolean quadricStale = false;
+ /** the nearest vertex in the "score_against" mesh */
+ public HasQuadric nearest_in_other_mesh;
+
+ /** the number of vertices in the other mesh for which this is the nearest_in_other_mesh */
+ public int quadric_count;
+
+ /** the total error quadric (contributions from all vertices in other mesh for which this is nearest) */
+ public Matrix quadric = Matrix.ZERO;
+
+ public Matrix fundamentalQuadric = null;
+
+ public void recomputeFundamentalQuadricIfNeighborChanged() {
+ HasQuadric oldv = nearest_in_other_mesh;
+ HasQuadric newv = nearest();
+ if (oldv==newv) return;
+ recomputeFundamentalQuadric();
+ if (oldv!=null) oldv.recomputeFundamentalQuadricIfNeighborChanged();
+ // for some reason this causes an infinite loop
+ //if (newv!=null) newv.recomputeFundamentalQuadricIfNeighborChanged();
+ }
+ public void recomputeFundamentalQuadricIfStale() {
+ if (quadricStale || fundamentalQuadric==null)
+ recomputeFundamentalQuadric();
+ }
+ public abstract void recomputeFundamentalQuadric();
+ public abstract void unApplyQuadricToNeighbor();
+ public abstract void applyQuadricToNeighbor();
+ public abstract void reComputeErrorAround();
+ public abstract void reComputeError();
+ public abstract void unComputeError();
+ public abstract void computeError();
+ public abstract HasQuadric nearest();
+ public Matrix fundamentalQuadric() {
+ if (fundamentalQuadric == null) recomputeFundamentalQuadric();
+ return fundamentalQuadric;
+ }
+}