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diff --git a/src/demos/xtrans/InterpolatedQuad3f.java b/src/demos/xtrans/InterpolatedQuad3f.java
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--- a/src/demos/xtrans/InterpolatedQuad3f.java
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-/*
- * 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 of three-dimensional floating-point values which
- * interpolates between specified start and end values.
- *
- * @author Kenneth Russell
- */
-
-public class InterpolatedQuad3f {
-  private Quad3f start;
-  private Quad3f end;
-
-  /** Constructs a new InterpolatedQuad3f. By default both the start
-      and end quadrilaterals have all of their points set to the
-      origin. */
-  public InterpolatedQuad3f() {
-    start = new Quad3f();
-    end = new Quad3f();
-  }
-
-  /** Returns the starting value for the interpolation. */
-  public Quad3f getStart() {
-    return start;
-  }
-
-  /** Sets the starting value for the interpolation. */
-  public void setStart(Quad3f quad) {
-    start.set(quad);
-  }
-
-  /** Returns the ending value for the interpolation. */
-  public Quad3f getEnd() {
-    return end;
-  }
-
-  /** Sets the ending value for the interpolation. */
-  public void setEnd(Quad3f quad) {
-    end.set(quad);
-  }
-
-  /** Gets the current interpolated value at the specified fraction of
-      interpolation (0.0 - 1.0). */
-  public Quad3f getCurrent(float fraction) {
-    return start.times(1.0f - fraction).plus(end.times(fraction));
-  }
-}