1 package edu.berkeley.qfat.geom;
2 import javax.media.opengl.*;
4 /** any object associated with a specific point in 3D space */
5 public abstract class HasQuadric extends HasPoint {
7 public Matrix errorQuadric() { return quadric; }
8 public boolean quadricStale = false;
9 /** the nearest vertex in the "score_against" mesh */
10 public HasQuadric nearest_in_other_mesh;
12 /** the number of vertices in the other mesh for which this is the nearest_in_other_mesh */
13 public int quadric_count;
15 /** the total error quadric (contributions from all vertices in other mesh for which this is nearest) */
16 public Matrix quadric = Matrix.ZERO;
18 public Matrix fundamentalQuadric = null;
20 public void recomputeFundamentalQuadricIfNeighborChanged() {
21 HasQuadric oldv = nearest_in_other_mesh;
22 HasQuadric newv = nearest();
23 if (oldv==newv) return;
24 recomputeFundamentalQuadric();
25 if (oldv!=null) oldv.recomputeFundamentalQuadricIfNeighborChanged();
26 // for some reason this causes an infinite loop
27 //if (newv!=null) newv.recomputeFundamentalQuadricIfNeighborChanged();
29 public void recomputeFundamentalQuadricIfStale() {
30 if (quadricStale || fundamentalQuadric==null)
31 recomputeFundamentalQuadric();
33 public abstract void recomputeFundamentalQuadric();
34 public abstract void unApplyQuadricToNeighbor();
35 public abstract void applyQuadricToNeighbor();
36 public abstract void reComputeErrorAround();
37 public abstract void reComputeError();
38 public abstract void unComputeError();
39 public abstract void computeError();
40 public abstract HasQuadric nearest();
41 public Matrix fundamentalQuadric() {
42 if (fundamentalQuadric == null) recomputeFundamentalQuadric();
43 return fundamentalQuadric;