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diff --git a/src/demos/xtrans/Quad2f.java b/src/demos/xtrans/Quad2f.java
deleted file mode 100755
index 2d26445..0000000
--- a/src/demos/xtrans/Quad2f.java
+++ /dev/null
@@ -1,116 +0,0 @@
-/*
- * Copyright (c) 2005 Sun Microsystems, Inc. All Rights Reserved.
- * 
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- * 
- * - Redistribution of source code must retain the above copyright
- *   notice, this list of conditions and the following disclaimer.
- * 
- * - Redistribution in binary form must reproduce the above copyright
- *   notice, this list of conditions and the following disclaimer in the
- *   documentation and/or other materials provided with the distribution.
- * 
- * Neither the name of Sun Microsystems, Inc. or the names of
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- * 
- * This software is provided "AS IS," without a warranty of any kind. ALL
- * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
- * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
- * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
- * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
- * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
- * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
- * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
- * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
- * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
- * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
- * You acknowledge that this software is not designed or intended for use
- * in the design, construction, operation or maintenance of any nuclear
- * facility.
- * 
- * Sun gratefully acknowledges that this software was originally authored
- * and developed by Kenneth Bradley Russell and Christopher John Kline.
- */
-
-package demos.xtrans;
-
-import gleem.linalg.*;
-
-/** A quadrilateral in which the vertices are two-dimensional
- * floating-point values.
- *
- * @author Kenneth Russell
- */
-
-public class Quad2f {
-  private Vec2f[] vecs;
-
-  public static final int UPPER_LEFT  = 0;
-  public static final int LOWER_LEFT  = 1;
-  public static final int LOWER_RIGHT = 2;
-  public static final int UPPER_RIGHT = 2;
-
-  private static final int NUM_VECS = 4;
-  
-  /** Constructs a Quad2f in which all the vertices are set to the
-      origin. */
-  public Quad2f() {
-    vecs = new Vec2f[NUM_VECS];
-    for (int i = 0; i < NUM_VECS; i++) {
-      vecs[i] = new Vec2f();
-    }
-  }
-
-  /** Constructs a Quad2f in which the vertices are set to the
-      specified values. */
-  public Quad2f(Vec2f upperLeft,
-                Vec2f lowerLeft,
-                Vec2f lowerRight,
-                Vec2f upperRight) {
-    this();
-    setVec(0, upperLeft);
-    setVec(1, lowerLeft);
-    setVec(2, lowerRight);
-    setVec(3, upperRight);
-  }
-
-  /** Sets the specified vertex to the specified value. */
-  public void setVec(int which, Vec2f val) {
-    vecs[which].set(val);
-  }
-
-  /** Returns the specified vertex. */
-  public Vec2f getVec(int which) {
-    return vecs[which];
-  }
-
-  /** Sets all four points of this quadrilateral. */
-  public void set(Quad2f quad) {
-    for (int i = 0; i < NUM_VECS; i++) {
-      setVec(i, quad.getVec(i));
-    }
-  }
-
-  /** Returns a newly-constructed Quad2f in which all vertices have
-      been multiplied in scalar fashion by the passed value.  */
-  public Quad2f times(float val) {
-    return new Quad2f(getVec(0).times(val),
-                      getVec(1).times(val),
-                      getVec(2).times(val),
-                      getVec(3).times(val));
-  }
-
-  /** Returns a newly-constructed Quad2f in which the vertices are the
-      component-wise sums of this quad and the passed quad. */
-  public Quad2f plus(Quad2f val) {
-    return new Quad2f(getVec(0).plus(val.getVec(0)),
-                      getVec(1).plus(val.getVec(1)),
-                      getVec(2).plus(val.getVec(2)),
-                      getVec(3).plus(val.getVec(3)));
-  }
-}