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diff --git a/src/classes/com/sun/opengl/impl/glu/nurbs/Splinespec.java b/src/classes/com/sun/opengl/impl/glu/nurbs/Splinespec.java
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+++ b/src/classes/com/sun/opengl/impl/glu/nurbs/Splinespec.java
@@ -0,0 +1,204 @@
+package com.sun.opengl.impl.glu.nurbs;
+
+/*
+ ** License Applicability. Except to the extent portions of this file are
+ ** made subject to an alternative license as permitted in the SGI Free
+ ** Software License B, Version 1.1 (the "License"), the contents of this
+ ** file are subject only to the provisions of the License. You may not use
+ ** this file except in compliance with the License. You may obtain a copy
+ ** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
+ ** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
+ **
+ ** http://oss.sgi.com/projects/FreeB
+ **
+ ** Note that, as provided in the License, the Software is distributed on an
+ ** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
+ ** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
+ ** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
+ ** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
+ **
+ ** Original Code. The Original Code is: OpenGL Sample Implementation,
+ ** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
+ ** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
+ ** Copyright in any portions created by third parties is as indicated
+ ** elsewhere herein. All Rights Reserved.
+ **
+ ** Additional Notice Provisions: The application programming interfaces
+ ** established by SGI in conjunction with the Original Code are The
+ ** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
+ ** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
+ ** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
+ ** Window System(R) (Version 1.3), released October 19, 1998. This software
+ ** was created using the OpenGL(R) version 1.2.1 Sample Implementation
+ ** published by SGI, but has not been independently verified as being
+ ** compliant with the OpenGL(R) version 1.2.1 Specification.
+ */
+
+/**
+ * NURBS definition
+ * @author Tomas Hrasky
+ *
+ */
+public class Splinespec {
+
+  /**
+   * Dimension
+   */
+  private int dim;
+
+  /**
+   * Knot vector specs
+   */
+  private Knotspec kspec;
+
+  /**
+   * Control points after conversion
+   */
+  private CArrayOfFloats outcpts;
+
+  /**
+   * Makes new Splinespec with given dimension
+   * @param i dimension
+   */
+  public Splinespec(int i) {
+    // DONE
+    this.dim = i;
+  }
+
+  /**
+   * Initializes knotspec according to knotvector
+   * @param knotvector basic knotvector
+   */
+  public void kspecinit(Knotvector knotvector) {
+    // DONE
+    this.kspec = new Knotspec();
+    kspec.inkbegin = new CArrayOfFloats(knotvector.knotlist, 0);
+    kspec.inkend = new CArrayOfFloats(knotvector.knotlist,
+                                      knotvector.knotcount);
+    kspec.prestride = knotvector.stride;
+    kspec.order = knotvector.order;
+    kspec.next = null;
+  }
+
+  /**
+   * Initializes knotspec according to knotvector - SURFACE
+   * @param sknotvector knotvector in u dir
+   * @param tknotvector knotvector in v dir
+   */
+  public void kspecinit(Knotvector sknotvector, Knotvector tknotvector) {
+    // DONE
+    this.kspec = new Knotspec();
+    Knotspec tkspec = new Knotspec();
+
+    kspec.inkbegin = new CArrayOfFloats(sknotvector.knotlist, 0);
+    kspec.inkend = new CArrayOfFloats(sknotvector.knotlist,
+                                      sknotvector.knotcount);
+    kspec.prestride = sknotvector.stride;
+    kspec.order = sknotvector.order;
+    kspec.next = tkspec;
+
+    tkspec.inkbegin = new CArrayOfFloats(tknotvector.knotlist, 0);
+    tkspec.inkend = new CArrayOfFloats(tknotvector.knotlist,
+                                       tknotvector.knotcount);
+    tkspec.prestride = tknotvector.stride;
+    tkspec.order = tknotvector.order;
+    tkspec.next = null;
+  }
+
+  /**
+   * Preselect and select knotspecs
+   */
+  public void select() {
+    // DONE
+    for (Knotspec knotspec = kspec; knotspec != null; knotspec = knotspec.next) {
+      knotspec.preselect();
+      knotspec.select();
+    }
+
+  }
+
+  /**
+   * Prepares for conversion
+   * @param ncoords number of coords
+   */
+  public void layout(int ncoords) {
+    // DONE
+    int stride = ncoords;
+    for (Knotspec knotspec = kspec; knotspec != null; knotspec = knotspec.next) {
+      knotspec.poststride = stride;
+      stride *= (knotspec.bend.getPointer() - knotspec.bbegin
+                 .getPointer())
+        * knotspec.order + knotspec.postoffset;
+      knotspec.preoffset *= knotspec.prestride;
+      knotspec.prewidth *= knotspec.poststride;
+      knotspec.postwidth *= knotspec.poststride;
+      knotspec.postoffset *= knotspec.poststride;
+      knotspec.ncoords = ncoords;
+    }
+    outcpts = new CArrayOfFloats(new float[stride]);
+
+  }
+
+  /**
+   * Prepares quilt for conversion
+   * @param quilt quilt to work with
+   */
+  public void setupquilt(Quilt quilt) {
+    // DONE
+    CArrayOfQuiltspecs qspec = new CArrayOfQuiltspecs(quilt.qspec);
+    quilt.eqspec = new CArrayOfQuiltspecs(qspec.getArray(), dim);
+    for (Knotspec knotspec = kspec; knotspec != null;) {
+      qspec.get().stride = knotspec.poststride;
+      qspec.get().width = knotspec.bend.getPointer()
+        - knotspec.bbegin.getPointer();
+      qspec.get().order = knotspec.order;
+      qspec.get().offset = knotspec.postoffset;
+      qspec.get().index = 0;
+      qspec.get().bdry[0] = (knotspec.kleft.getPointer() == knotspec.kfirst
+                             .getPointer()) ? 1 : 0;
+      qspec.get().bdry[1] = (knotspec.kright.getPointer() == knotspec.klast
+                             .getPointer()) ? 1 : 0;
+      qspec.get().breakpoints = new float[qspec.get().width + 1];
+      CArrayOfFloats k = new CArrayOfFloats(qspec.get().breakpoints, 0);
+      for (CArrayOfBreakpts bk = new CArrayOfBreakpts(knotspec.bbegin); bk
+             .getPointer() <= knotspec.bend.getPointer(); bk.pp()) {
+        k.set(bk.get().value);
+        k.pp();
+      }
+      knotspec = knotspec.next;
+      if (knotspec != null)
+        qspec.pp();
+    }
+    quilt.cpts = new CArrayOfFloats(outcpts);
+    quilt.next = null;
+  }
+
+  /**
+   * Copies array of control points to output array
+   * @param ctlarray control points array
+   */
+  public void copy(CArrayOfFloats ctlarray) {
+    // DONE
+    kspec.copy(ctlarray, outcpts);
+
+  }
+
+  /**
+   * Transforms knotspecs - conversion
+   */
+  public void transform() {
+    // DONE
+    Knotspec knotspec;
+    outcpts.setPointer(0);
+    for (knotspec = kspec; knotspec != null; knotspec = knotspec.next)
+      knotspec.istransformed = false;
+
+    for (knotspec = kspec; knotspec != null; knotspec = knotspec.next) {
+      for (Knotspec kspec2 = kspec; kspec2 != null; kspec2 = kspec2.next)
+        kspec2.kspectotrans = knotspec;
+      kspec.transform(outcpts);
+      knotspec.istransformed = true;
+    }
+
+  }
+}