Added files missed in recent GLU putback

git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/jogl/trunk@174 232f8b59-042b-4e1e-8c03-345bb8c30851

1 files changed, 1049 insertions, 0 deletions

diff --git a/src/net/java/games/jogl/impl/GLUquadricImpl.java b/src/net/java/games/jogl/impl/GLUquadricImpl.java
new file mode 100755
index 000000000..cca415cc4
--- /dev/null
+++ b/src/net/java/games/jogl/impl/GLUquadricImpl.java
@@ -0,0 +1,1049 @@
+/*
+** 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.
+**
+** $Date$ $Revision$
+** $Header$
+*/
+
+/* 
+ * Copyright (c) 2002-2004 LWJGL Project
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are 
+ * met:
+ * 
+ * * Redistributions of source code must retain the above copyright 
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions 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 'LWJGL' nor the names of 
+ *   its contributors may be used to endorse or promote products derived 
+ *   from this software without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * Copyright (c) 2003 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
+ * MIDROSYSTEMS, 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.
+ */
+
+package net.java.games.jogl.impl;
+
+import net.java.games.jogl.*;
+
+/**
+ * GLUquadricImpl.java
+ * 
+ * 
+ * Created 22-dec-2003 (originally Quadric.java)
+ * @author Erik Duijs
+ * @author Kenneth Russell
+ */
+
+class GLUquadricImpl implements GLUquadric {
+  private int drawStyle;
+  private int orientation;
+  private boolean textureFlag;
+  private int normals;
+
+  GLUquadricImpl() {
+    drawStyle = GLU.GLU_FILL;
+    orientation = GLU.GLU_OUTSIDE;
+    textureFlag = false;
+    normals = GLU.GLU_SMOOTH;
+  }
+
+  /**
+   * specifies the draw style for quadrics.  
+   *
+   * The legal values are as follows:
+   *
+   * GLU.FILL:       Quadrics are rendered with polygon primitives. The polygons
+   *                 are drawn in a counterclockwise fashion with respect to
+   *                 their normals (as defined with glu.quadricOrientation).
+   *
+   * GLU.LINE:       Quadrics are rendered as a set of lines.
+   *
+   * GLU.SILHOUETTE: Quadrics are rendered as a set of lines, except that edges
+   * 		   separating coplanar faces will not be drawn.
+   *
+   * GLU.POINT:       Quadrics are rendered as a set of points.
+   * 
+   * @param drawStyle The drawStyle to set
+   */
+  void setDrawStyle(int drawStyle) {
+    this.drawStyle = drawStyle;
+  }
+
+  /**
+   * specifies what kind	of normals are desired for quadrics.
+   * The legal values	are as follows:
+   *
+   * GLU.NONE:     No normals are generated.
+   *
+   * GLU.FLAT:     One normal is generated for every facet of a quadric.
+   *
+   * GLU.SMOOTH:   One normal is generated for every vertex of a quadric.  This
+   *               is the default.
+   * 
+   * @param normals The normals to set
+   */
+  void setNormals(int normals) {
+    this.normals = normals;
+  }
+
+  /**
+   * specifies what kind of orientation is desired for.
+   * The orientation	values are as follows:
+   *
+   * GLU.OUTSIDE:  Quadrics are drawn with normals pointing outward.
+   *
+   * GLU.INSIDE:   Normals point inward. The default is GLU.OUTSIDE.
+   *
+   * Note that the interpretation of outward and inward depends on the quadric
+   * being drawn.
+   * 
+   * @param orientation The orientation to set
+   */
+  void setOrientation(int orientation) {
+    this.orientation = orientation;
+  }
+
+  /**
+   * specifies if texture coordinates should be generated for
+   * quadrics rendered with qobj. If the value of textureCoords is true,
+   * then texture coordinates are generated, and if textureCoords is false,
+   * they are not.. The default is false.
+   *
+   * The manner in which texture coordinates are generated depends upon the
+   * specific quadric rendered.
+   * 
+   * @param textureFlag The textureFlag to set
+   */
+  void setTextureFlag(boolean textureFlag) {
+    this.textureFlag = textureFlag;
+  }
+
+  /**
+   * Returns the drawStyle.
+   * @return int
+   */
+  int getDrawStyle() {
+    return drawStyle;
+  }
+
+  /**
+   * Returns the normals.
+   * @return int
+   */
+  int getNormals() {
+    return normals;
+  }
+
+  /**
+   * Returns the orientation.
+   * @return int
+   */
+  int getOrientation() {
+    return orientation;
+  }
+
+  /**
+   * Returns the textureFlag.
+   * @return boolean
+   */
+  boolean getTextureFlag() {
+    return textureFlag;
+  }
+
+  /**
+   * draws a cylinder oriented along the z axis. The base of the
+   * cylinder is placed at z = 0, and the top at z=height. Like a sphere, a
+   * cylinder is subdivided around the z axis into slices, and along the z axis
+   * into stacks.
+   *
+   * Note that if topRadius is set to zero, then this routine will generate a
+   * cone.
+   *
+   * If the orientation is set to GLU.OUTSIDE (with glu.quadricOrientation), then
+   * any generated normals point away from the z axis. Otherwise, they point
+   * toward the z axis.
+   *
+   * If texturing is turned on (with glu.quadricTexture), then texture
+   * coordinates are generated so that t ranges linearly from 0.0 at z = 0 to
+   * 1.0 at z = height, and s ranges from 0.0 at the +y axis, to 0.25 at the +x
+   * axis, to 0.5 at the -y axis, to 0.75 at the -x axis, and back to 1.0 at the
+   * +y axis.
+   *
+   * @param baseRadius  Specifies the radius of the cylinder at z = 0.
+   * @param topRadius   Specifies the radius of the cylinder at z = height.
+   * @param height      Specifies the height of the cylinder.
+   * @param slices      Specifies the number of subdivisions around the z axis.
+   * @param stacks      Specifies the number of subdivisions along the z axis.
+   */
+  void drawCylinder(GL gl, float baseRadius, float topRadius, float height, int slices, int stacks) {
+
+    float da, r, dr, dz;
+    float x, y, z, nz, nsign;
+    int i, j;
+
+    if (orientation == GLU.GLU_INSIDE) {
+      nsign = -1.0f;
+    } else {
+      nsign = 1.0f;
+    }
+
+    da = 2.0f * PI / slices;
+    dr = (topRadius - baseRadius) / stacks;
+    dz = height / stacks;
+    nz = (baseRadius - topRadius) / height;
+    // Z component of normal vectors
+
+    if (drawStyle == GLU.GLU_POINT) {
+      gl.glBegin(GL.GL_POINTS);
+      for (i = 0; i < slices; i++) {
+        x = cos((i * da));
+        y = sin((i * da));
+        normal3f(gl, x * nsign, y * nsign, nz * nsign);
+
+        z = 0.0f;
+        r = baseRadius;
+        for (j = 0; j <= stacks; j++) {
+          gl.glVertex3f((x * r), (y * r), z);
+          z += dz;
+          r += dr;
+        }
+      }
+      gl.glEnd();
+    } else if (drawStyle == GLU.GLU_LINE || drawStyle == GLU.GLU_SILHOUETTE) {
+      // Draw rings
+      if (drawStyle == GLU.GLU_LINE) {
+        z = 0.0f;
+        r = baseRadius;
+        for (j = 0; j <= stacks; j++) {
+          gl.glBegin(GL.GL_LINE_LOOP);
+          for (i = 0; i < slices; i++) {
+            x = cos((i * da));
+            y = sin((i * da));
+            normal3f(gl, x * nsign, y * nsign, nz * nsign);
+            gl.glVertex3f((x * r), (y * r), z);
+          }
+          gl.glEnd();
+          z += dz;
+          r += dr;
+        }
+      } else {
+        // draw one ring at each end
+        if (baseRadius != 0.0) {
+          gl.glBegin(GL.GL_LINE_LOOP);
+          for (i = 0; i < slices; i++) {
+            x = cos((i * da));
+            y = sin((i * da));
+            normal3f(gl, x * nsign, y * nsign, nz * nsign);
+            gl.glVertex3f((x * baseRadius), (y * baseRadius), 0.0f);
+          }
+          gl.glEnd();
+          gl.glBegin(GL.GL_LINE_LOOP);
+          for (i = 0; i < slices; i++) {
+            x = cos((i * da));
+            y = sin((i * da));
+            normal3f(gl, x * nsign, y * nsign, nz * nsign);
+            gl.glVertex3f((x * topRadius), (y * topRadius), height);
+          }
+          gl.glEnd();
+        }
+      }
+      // draw length lines
+      gl.glBegin(GL.GL_LINES);
+      for (i = 0; i < slices; i++) {
+        x = cos((i * da));
+        y = sin((i * da));
+        normal3f(gl, x * nsign, y * nsign, nz * nsign);
+        gl.glVertex3f((x * baseRadius), (y * baseRadius), 0.0f);
+        gl.glVertex3f((x * topRadius), (y * topRadius), (height));
+      }
+      gl.glEnd();
+    } else if (drawStyle == GLU.GLU_FILL) {
+      float ds = 1.0f / slices;
+      float dt = 1.0f / stacks;
+      float t = 0.0f;
+      z = 0.0f;
+      r = baseRadius;
+      for (j = 0; j < stacks; j++) {
+        float s = 0.0f;
+        gl.glBegin(GL.GL_QUAD_STRIP);
+        for (i = 0; i <= slices; i++) {
+          if (i == slices) {
+            x = sin(0.0f);
+            y = cos(0.0f);
+          } else {
+            x = sin((i * da));
+            y = cos((i * da));
+          }
+          if (nsign == 1.0f) {
+            normal3f(gl, (x * nsign), (y * nsign), (nz * nsign));
+            TXTR_COORD(gl, s, t);
+            gl.glVertex3f((x * r), (y * r), z);
+            normal3f(gl, (x * nsign), (y * nsign), (nz * nsign));
+            TXTR_COORD(gl, s, t + dt);
+            gl.glVertex3f((x * (r + dr)), (y * (r + dr)), (z + dz));
+          } else {
+            normal3f(gl, x * nsign, y * nsign, nz * nsign);
+            TXTR_COORD(gl, s, t);
+            gl.glVertex3f((x * r), (y * r), z);
+            normal3f(gl, x * nsign, y * nsign, nz * nsign);
+            TXTR_COORD(gl, s, t + dt);
+            gl.glVertex3f((x * (r + dr)), (y * (r + dr)), (z + dz));
+          }
+          s += ds;
+        } // for slices
+        gl.glEnd();
+        r += dr;
+        t += dt;
+        z += dz;
+      } // for stacks
+    }
+  }
+
+  /**
+   * renders a disk on the z = 0  plane.  The disk has a radius of
+   * outerRadius, and contains a concentric circular hole with a radius of
+   * innerRadius. If innerRadius is 0, then no hole is generated. The disk is
+   * subdivided around the z axis into slices (like pizza slices), and also
+   * about the z axis into rings (as specified by slices and loops,
+   * respectively).
+   *
+   * With respect to orientation, the +z side of the disk is considered to be
+   * "outside" (see glu.quadricOrientation).  This means that if the orientation
+   * is set to GLU.OUTSIDE, then any normals generated point along the +z axis.
+   * Otherwise, they point along the -z axis.
+   *
+   * If texturing is turned on (with glu.quadricTexture), texture coordinates are
+   * generated linearly such that where r=outerRadius, the value at (r, 0, 0) is
+   * (1, 0.5), at (0, r, 0) it is (0.5, 1), at (-r, 0, 0) it is (0, 0.5), and at
+   * (0, -r, 0) it is (0.5, 0).
+   */
+  public void drawDisk(GL gl, float innerRadius, float outerRadius, int slices, int loops)
+  {
+    float da, dr;
+
+    /* Normal vectors */
+    if (normals != GLU.GLU_NONE) {
+      if (orientation == GLU.GLU_OUTSIDE) {
+        gl.glNormal3f(0.0f, 0.0f, +1.0f);
+      }
+      else {
+        gl.glNormal3f(0.0f, 0.0f, -1.0f);
+      }
+    }
+	
+    da = 2.0f * PI / slices;
+    dr = (outerRadius - innerRadius) /  loops;
+	
+    switch (drawStyle) {
+    case GLU.GLU_FILL:
+      {
+        /* texture of a gluDisk is a cut out of the texture unit square
+         * x, y in [-outerRadius, +outerRadius]; s, t in [0, 1]
+         * (linear mapping)
+         */
+        float dtc = 2.0f * outerRadius;
+        float sa, ca;
+        float r1 = innerRadius;
+        int l;
+        for (l = 0; l < loops; l++) {
+          float r2 = r1 + dr;
+          if (orientation == GLU.GLU_OUTSIDE) {
+            int s;
+            gl.glBegin(gl.GL_QUAD_STRIP);
+            for (s = 0; s <= slices; s++) {
+              float a;
+              if (s == slices)
+                a = 0.0f;
+              else
+                a = s * da;
+              sa = sin(a);
+              ca = cos(a);
+              TXTR_COORD(gl, 0.5f + sa * r2 / dtc, 0.5f + ca * r2 / dtc);
+              gl.glVertex2f(r2 * sa, r2 * ca);
+              TXTR_COORD(gl, 0.5f + sa * r1 / dtc, 0.5f + ca * r1 / dtc);
+              gl.glVertex2f(r1 * sa, r1 * ca);
+            }
+            gl.glEnd();
+          }
+          else {
+            int s;
+            gl.glBegin(GL.GL_QUAD_STRIP);
+            for (s = slices; s >= 0; s--) {
+              float a;
+              if (s == slices)
+                a = 0.0f;
+              else
+                a = s * da;
+              sa = sin(a);
+              ca = cos(a);
+              TXTR_COORD(gl, 0.5f - sa * r2 / dtc, 0.5f + ca * r2 / dtc);
+              gl.glVertex2f(r2 * sa, r2 * ca);
+              TXTR_COORD(gl, 0.5f - sa * r1 / dtc, 0.5f + ca * r1 / dtc);
+              gl.glVertex2f(r1 * sa, r1 * ca);
+            }
+            gl.glEnd();
+          }
+          r1 = r2;
+        }
+        break;
+      }
+    case GLU.GLU_LINE:
+      {
+        int l, s;
+        /* draw loops */
+        for (l = 0; l <= loops; l++) {
+          float r = innerRadius + l * dr;
+          gl.glBegin(GL.GL_LINE_LOOP);
+          for (s = 0; s < slices; s++) {
+            float a = s * da;
+            gl.glVertex2f(r * sin(a), r * cos(a));
+          }
+          gl.glEnd();
+        }
+        /* draw spokes */
+        for (s = 0; s < slices; s++) {
+          float a = s * da;
+          float x = sin(a);
+          float y = cos(a);
+          gl.glBegin(GL.GL_LINE_STRIP);
+          for (l = 0; l <= loops; l++) {
+            float r = innerRadius + l * dr;
+            gl.glVertex2f(r * x, r * y);
+          }
+          gl.glEnd();
+        }
+        break;
+      }
+    case GLU.GLU_POINT:
+      {
+        int s;
+        gl.glBegin(GL.GL_POINTS);
+        for (s = 0; s < slices; s++) {
+          float a = s * da;
+          float x = sin(a);
+          float y = cos(a);
+          int l;
+          for (l = 0; l <= loops; l++) {
+            float r = innerRadius * l * dr;
+            gl.glVertex2f(r * x, r * y);
+          }
+        }
+        gl.glEnd();
+        break;
+      }
+    case GLU.GLU_SILHOUETTE:
+      {
+        if (innerRadius != 0.0) {
+          float a;
+          gl.glBegin(GL.GL_LINE_LOOP);
+          for (a = 0.0f; a < 2.0 * PI; a += da) {
+            float x = innerRadius * sin(a);
+            float y = innerRadius * cos(a);
+            gl.glVertex2f(x, y);
+          }
+          gl.glEnd();
+        }
+        {
+          float a;
+          gl.glBegin(GL.GL_LINE_LOOP);
+          for (a = 0; a < 2.0f * PI; a += da) {
+            float x = outerRadius * sin(a);
+            float y = outerRadius * cos(a);
+            gl.glVertex2f(x, y);
+          }
+          gl.glEnd();
+        }
+        break;
+      }
+    default:
+      return;
+    }
+  }
+
+  /**
+   * renders a partial disk on the z=0 plane. A partial disk is similar to a
+   * full disk, except that only the subset of the disk from startAngle
+   * through startAngle + sweepAngle is included (where 0 degrees is along
+   * the +y axis, 90 degrees along the +x axis, 180 along the -y axis, and
+   * 270 along the -x axis).
+   * 
+   * The partial disk has a radius of outerRadius, and contains a concentric
+   * circular hole with a radius of innerRadius. If innerRadius is zero, then
+   * no hole is generated. The partial disk is subdivided around the z axis
+   * into slices (like pizza slices), and also about the z axis into rings
+   * (as specified by slices and loops, respectively).
+   * 
+   * With respect to orientation, the +z side of the partial disk is
+   * considered to be outside (see gluQuadricOrientation). This means that if
+   * the orientation is set to GLU.GLU_OUTSIDE, then any normals generated point
+   * along the +z axis. Otherwise, they point along the -z axis.
+   * 
+   * If texturing is turned on (with gluQuadricTexture), texture coordinates
+   * are generated linearly such that where r=outerRadius, the value at (r, 0, 0)
+   * is (1, 0.5), at (0, r, 0) it is (0.5, 1), at (-r, 0, 0) it is (0, 0.5),
+   * and at (0, -r, 0) it is (0.5, 0).
+   */
+  public void drawPartialDisk(GL gl,
+                              float innerRadius,
+                              float outerRadius,
+                              int slices,
+                              int loops,
+                              float startAngle,
+                              float sweepAngle) {
+    int i, j, max;
+    float[] sinCache = new float[CACHE_SIZE];
+    float[] cosCache = new float[CACHE_SIZE];
+    float angle;
+    float x, y;
+    float sintemp, costemp;
+    float deltaRadius;
+    float radiusLow, radiusHigh;
+    float texLow = 0, texHigh = 0;
+    float angleOffset;
+    int slices2;
+    int finish;
+
+    if (slices >= CACHE_SIZE)
+      slices = CACHE_SIZE - 1;
+    if (slices < 2
+        || loops < 1
+        || outerRadius <= 0.0f
+        || innerRadius < 0.0f
+        || innerRadius > outerRadius) {
+      //gluQuadricError(qobj, GLU.GLU_INVALID_VALUE);
+      System.err.println("PartialDisk: GLU_INVALID_VALUE");
+      return;
+    }
+
+    if (sweepAngle < -360.0f)
+      sweepAngle = 360.0f;
+    if (sweepAngle > 360.0f)
+      sweepAngle = 360.0f;
+    if (sweepAngle < 0) {
+      startAngle += sweepAngle;
+      sweepAngle = -sweepAngle;
+    }
+
+    if (sweepAngle == 360.0f) {
+      slices2 = slices;
+    } else {
+      slices2 = slices + 1;
+    }
+
+    /* Compute length (needed for normal calculations) */
+    deltaRadius = outerRadius - innerRadius;
+
+    /* Cache is the vertex locations cache */
+
+    angleOffset = startAngle / 180.0f * PI;
+    for (i = 0; i <= slices; i++) {
+      angle = angleOffset + ((PI * sweepAngle) / 180.0f) * i / slices;
+      sinCache[i] = sin(angle);
+      cosCache[i] = cos(angle);
+    }
+
+    if (sweepAngle == 360.0f) {
+      sinCache[slices] = sinCache[0];
+      cosCache[slices] = cosCache[0];
+    }
+
+    switch (normals) {
+    case GLU.GLU_FLAT :
+    case GLU.GLU_SMOOTH :
+      if (orientation == GLU.GLU_OUTSIDE) {
+        gl.glNormal3f(0.0f, 0.0f, 1.0f);
+      } else {
+        gl.glNormal3f(0.0f, 0.0f, -1.0f);
+      }
+      break;
+    default :
+    case GLU.GLU_NONE :
+      break;
+    }
+
+    switch (drawStyle) {
+    case GLU.GLU_FILL :
+      if (innerRadius == .0f) {
+        finish = loops - 1;
+        /* Triangle strip for inner polygons */
+        gl.glBegin(GL.GL_TRIANGLE_FAN);
+        if (textureFlag) {
+          gl.glTexCoord2f(0.5f, 0.5f);
+        }
+        gl.glVertex3f(0.0f, 0.0f, 0.0f);
+        radiusLow = outerRadius - deltaRadius * ((float) (loops - 1) / loops);
+        if (textureFlag) {
+          texLow = radiusLow / outerRadius / 2;
+        }
+
+        if (orientation == GLU.GLU_OUTSIDE) {
+          for (i = slices; i >= 0; i--) {
+            if (textureFlag) {
+              gl.glTexCoord2f(texLow * sinCache[i] + 0.5f,
+                              texLow * cosCache[i] + 0.5f);
+            }
+            gl.glVertex3f(radiusLow * sinCache[i], radiusLow * cosCache[i], 0.0f);
+          }
+        } else {
+          for (i = 0; i <= slices; i++) {
+            if (textureFlag) {
+              gl.glTexCoord2f(texLow * sinCache[i] + 0.5f,
+                              texLow * cosCache[i] + 0.5f);
+            }
+            gl.glVertex3f(radiusLow * sinCache[i], radiusLow * cosCache[i], 0.0f);
+          }
+        }
+        gl.glEnd();
+      } else {
+        finish = loops;
+      }
+      for (j = 0; j < finish; j++) {
+        radiusLow = outerRadius - deltaRadius * ((float) j / loops);
+        radiusHigh = outerRadius - deltaRadius * ((float) (j + 1) / loops);
+        if (textureFlag) {
+          texLow = radiusLow / outerRadius / 2;
+          texHigh = radiusHigh / outerRadius / 2;
+        }
+
+        gl.glBegin(GL.GL_QUAD_STRIP);
+        for (i = 0; i <= slices; i++) {
+          if (orientation == GLU.GLU_OUTSIDE) {
+            if (textureFlag) {
+              gl.glTexCoord2f(texLow * sinCache[i] + 0.5f,
+                              texLow * cosCache[i] + 0.5f);
+            }
+            gl.glVertex3f(radiusLow * sinCache[i], radiusLow * cosCache[i], 0.0f);
+
+            if (textureFlag) {
+              gl.glTexCoord2f(texHigh * sinCache[i] + 0.5f,
+                              texHigh * cosCache[i] + 0.5f);
+            }
+            gl.glVertex3f(radiusHigh * sinCache[i],
+                          radiusHigh * cosCache[i],
+                          0.0f);
+          } else {
+            if (textureFlag) {
+              gl.glTexCoord2f(texHigh * sinCache[i] + 0.5f,
+                              texHigh * cosCache[i] + 0.5f);
+            }
+            gl.glVertex3f(radiusHigh * sinCache[i],
+                          radiusHigh * cosCache[i],
+                          0.0f);
+
+            if (textureFlag) {
+              gl.glTexCoord2f(texLow * sinCache[i] + 0.5f,
+                              texLow * cosCache[i] + 0.5f);
+            }
+            gl.glVertex3f(radiusLow * sinCache[i], radiusLow * cosCache[i], 0.0f);
+          }
+        }
+        gl.glEnd();
+      }
+      break;
+    case GLU.GLU_POINT :
+      gl.glBegin(GL.GL_POINTS);
+      for (i = 0; i < slices2; i++) {
+        sintemp = sinCache[i];
+        costemp = cosCache[i];
+        for (j = 0; j <= loops; j++) {
+          radiusLow = outerRadius - deltaRadius * ((float) j / loops);
+
+          if (textureFlag) {
+            texLow = radiusLow / outerRadius / 2;
+
+            gl.glTexCoord2f(texLow * sinCache[i] + 0.5f,
+                            texLow * cosCache[i] + 0.5f);
+          }
+          gl.glVertex3f(radiusLow * sintemp, radiusLow * costemp, 0.0f);
+        }
+      }
+      gl.glEnd();
+      break;
+    case GLU.GLU_LINE :
+      if (innerRadius == outerRadius) {
+        gl.glBegin(GL.GL_LINE_STRIP);
+
+        for (i = 0; i <= slices; i++) {
+          if (textureFlag) {
+            gl.glTexCoord2f(sinCache[i] / 2 + 0.5f, cosCache[i] / 2 + 0.5f);
+          }
+          gl.glVertex3f(innerRadius * sinCache[i], innerRadius * cosCache[i], 0.0f);
+        }
+        gl.glEnd();
+        break;
+      }
+      for (j = 0; j <= loops; j++) {
+        radiusLow = outerRadius - deltaRadius * ((float) j / loops);
+        if (textureFlag) {
+          texLow = radiusLow / outerRadius / 2;
+        }
+
+        gl.glBegin(GL.GL_LINE_STRIP);
+        for (i = 0; i <= slices; i++) {
+          if (textureFlag) {
+            gl.glTexCoord2f(texLow * sinCache[i] + 0.5f,
+                            texLow * cosCache[i] + 0.5f);
+          }
+          gl.glVertex3f(radiusLow * sinCache[i], radiusLow * cosCache[i], 0.0f);
+        }
+        gl.glEnd();
+      }
+      for (i = 0; i < slices2; i++) {
+        sintemp = sinCache[i];
+        costemp = cosCache[i];
+        gl.glBegin(GL.GL_LINE_STRIP);
+        for (j = 0; j <= loops; j++) {
+          radiusLow = outerRadius - deltaRadius * ((float) j / loops);
+          if (textureFlag) {
+            texLow = radiusLow / outerRadius / 2;
+          }
+
+          if (textureFlag) {
+            gl.glTexCoord2f(texLow * sinCache[i] + 0.5f,
+                            texLow * cosCache[i] + 0.5f);
+          }
+          gl.glVertex3f(radiusLow * sintemp, radiusLow * costemp, 0.0f);
+        }
+        gl.glEnd();
+      }
+      break;
+    case GLU.GLU_SILHOUETTE :
+      if (sweepAngle < 360.0f) {
+        for (i = 0; i <= slices; i += slices) {
+          sintemp = sinCache[i];
+          costemp = cosCache[i];
+          gl.glBegin(GL.GL_LINE_STRIP);
+          for (j = 0; j <= loops; j++) {
+            radiusLow = outerRadius - deltaRadius * ((float) j / loops);
+
+            if (textureFlag) {
+              texLow = radiusLow / outerRadius / 2;
+              gl.glTexCoord2f(texLow * sinCache[i] + 0.5f,
+                              texLow * cosCache[i] + 0.5f);
+            }
+            gl.glVertex3f(radiusLow * sintemp, radiusLow * costemp, 0.0f);
+          }
+          gl.glEnd();
+        }
+      }
+      for (j = 0; j <= loops; j += loops) {
+        radiusLow = outerRadius - deltaRadius * ((float) j / loops);
+        if (textureFlag) {
+          texLow = radiusLow / outerRadius / 2;
+        }
+
+        gl.glBegin(GL.GL_LINE_STRIP);
+        for (i = 0; i <= slices; i++) {
+          if (textureFlag) {
+            gl.glTexCoord2f(texLow * sinCache[i] + 0.5f,
+                            texLow * cosCache[i] + 0.5f);
+          }
+          gl.glVertex3f(radiusLow * sinCache[i], radiusLow * cosCache[i], 0.0f);
+        }
+        gl.glEnd();
+        if (innerRadius == outerRadius)
+          break;
+      }
+      break;
+    default :
+      break;
+    }
+  }
+
+  /**
+   * draws a sphere of the given	radius centered	around the origin.
+   * The sphere is subdivided around the z axis into slices and along the z axis
+   * into stacks (similar to lines of longitude and latitude).
+   *
+   * If the orientation is set to GLU.OUTSIDE (with glu.quadricOrientation), then
+   * any normals generated point away from the center of the sphere. Otherwise,
+   * they point toward the center of the sphere.
+
+   * If texturing is turned on (with glu.quadricTexture), then texture
+   * coordinates are generated so that t ranges from 0.0 at z=-radius to 1.0 at
+   * z=radius (t increases linearly along longitudinal lines), and s ranges from
+   * 0.0 at the +y axis, to 0.25 at the +x axis, to 0.5 at the -y axis, to 0.75
+   * at the -x axis, and back to 1.0 at the +y axis.
+   */
+  public void drawSphere(GL gl, float radius, int slices, int stacks) {
+    // TODO
+
+    float rho, drho, theta, dtheta;
+    float x, y, z;
+    float s, t, ds, dt;
+    int i, j, imin, imax;
+    boolean normals;
+    float nsign;
+
+    normals = (this.normals != GLU.GLU_NONE);
+
+    if (orientation == GLU.GLU_INSIDE) {
+      nsign = -1.0f;
+    } else {
+      nsign = 1.0f;
+    }
+
+    drho = PI / stacks;
+    dtheta = 2.0f * PI / slices;
+
+    if (drawStyle == GLU.GLU_FILL) {
+      if (textureFlag) {
+        // draw +Z end as a triangle fan
+        gl.glBegin(GL.GL_TRIANGLE_FAN);
+        gl.glNormal3f(0.0f, 0.0f, 1.0f);
+        gl.glVertex3f(0.0f, 0.0f, nsign * radius);
+        for (j = 0; j <= slices; j++) {
+          theta = (j == slices) ? 0.0f : j * dtheta;
+          x = -sin(theta) * sin(drho);
+          y = cos(theta) * sin(drho);
+          z = nsign * cos(drho);
+          if (normals) {
+            gl.glNormal3f(x * nsign, y * nsign, z * nsign);
+          }
+          gl.glVertex3f(x * radius, y * radius, z * radius);
+        }
+        gl.glEnd();
+      }
+
+      ds = 1.0f / slices;
+      dt = 1.0f / stacks;
+      t = 1.0f; // because loop now runs from 0
+      if (textureFlag) {
+        imin = 0;
+        imax = stacks;
+      } else {
+        imin = 1;
+        imax = stacks - 1;
+      }
+
+      // draw intermediate stacks as quad strips
+      for (i = imin; i < imax; i++) {
+        rho = i * drho;
+        gl.glBegin(GL.GL_QUAD_STRIP);
+        s = 0.0f;
+        for (j = 0; j <= slices; j++) {
+          theta = (j == slices) ? 0.0f : j * dtheta;
+          x = -sin(theta) * sin(rho);
+          y = cos(theta) * sin(rho);
+          z = nsign * cos(rho);
+          if (normals) {
+            gl.glNormal3f(x * nsign, y * nsign, z * nsign);
+          }
+          TXTR_COORD(gl, s, t);
+          gl.glVertex3f(x * radius, y * radius, z * radius);
+          x = -sin(theta) * sin(rho + drho);
+          y = cos(theta) * sin(rho + drho);
+          z = nsign * cos(rho + drho);
+          if (normals) {
+            gl.glNormal3f(x * nsign, y * nsign, z * nsign);
+          }
+          TXTR_COORD(gl, s, t - dt);
+          s += ds;
+          gl.glVertex3f(x * radius, y * radius, z * radius);
+        }
+        gl.glEnd();
+        t -= dt;
+      }
+
+      if (!textureFlag) {
+        // draw -Z end as a triangle fan
+        gl.glBegin(GL.GL_TRIANGLE_FAN);
+        gl.glNormal3f(0.0f, 0.0f, -1.0f);
+        gl.glVertex3f(0.0f, 0.0f, -radius * nsign);
+        rho = PI - drho;
+        s = 1.0f;
+        for (j = slices; j >= 0; j--) {
+          theta = (j == slices) ? 0.0f : j * dtheta;
+          x = -sin(theta) * sin(rho);
+          y = cos(theta) * sin(rho);
+          z = nsign * cos(rho);
+          if (normals)
+            gl.glNormal3f(x * nsign, y * nsign, z * nsign);
+          s -= ds;
+          gl.glVertex3f(x * radius, y * radius, z * radius);
+        }
+        gl.glEnd();
+      }
+    } else if (
+               drawStyle == GLU.GLU_LINE
+               || drawStyle == GLU.GLU_SILHOUETTE) {
+      // draw stack lines
+      for (i = 1;
+           i < stacks;
+           i++) { // stack line at i==stacks-1 was missing here
+        rho = i * drho;
+        gl.glBegin(GL.GL_LINE_LOOP);
+        for (j = 0; j < slices; j++) {
+          theta = j * dtheta;
+          x = cos(theta) * sin(rho);
+          y = sin(theta) * sin(rho);
+          z = cos(rho);
+          if (normals)
+            gl.glNormal3f(x * nsign, y * nsign, z * nsign);
+          gl.glVertex3f(x * radius, y * radius, z * radius);
+        }
+        gl.glEnd();
+      }
+      // draw slice lines
+      for (j = 0; j < slices; j++) {
+        theta = j * dtheta;
+        gl.glBegin(GL.GL_LINE_STRIP);
+        for (i = 0; i <= stacks; i++) {
+          rho = i * drho;
+          x = cos(theta) * sin(rho);
+          y = sin(theta) * sin(rho);
+          z = cos(rho);
+          if (normals)
+            gl.glNormal3f(x * nsign, y * nsign, z * nsign);
+          gl.glVertex3f(x * radius, y * radius, z * radius);
+        }
+        gl.glEnd();
+      }
+    } else if (drawStyle == GLU.GLU_POINT) {
+      // top and bottom-most points
+      gl.glBegin(GL.GL_POINTS);
+      if (normals)
+        gl.glNormal3f(0.0f, 0.0f, nsign);
+      gl.glVertex3f(0.0f, 0.0f, radius);
+      if (normals)
+        gl.glNormal3f(0.0f, 0.0f, -nsign);
+      gl.glVertex3f(0.0f, 0.0f, -radius);
+
+      // loop over stacks
+      for (i = 1; i < stacks - 1; i++) {
+        rho = i * drho;
+        for (j = 0; j < slices; j++) {
+          theta = j * dtheta;
+          x = cos(theta) * sin(rho);
+          y = sin(theta) * sin(rho);
+          z = cos(rho);
+          if (normals)
+            gl.glNormal3f(x * nsign, y * nsign, z * nsign);
+          gl.glVertex3f(x * radius, y * radius, z * radius);
+        }
+      }
+      gl.glEnd();
+    }
+  }
+
+
+  //----------------------------------------------------------------------
+  // Internals only below this point
+  //
+
+  private static final float PI = (float)Math.PI;
+  private static final int CACHE_SIZE = 240;
+
+  /**
+   * Call glNormal3f after scaling normal to unit length.
+   *
+   * @param x
+   * @param y
+   * @param z
+   */
+  private void normal3f(GL gl, float x, float y, float z) {
+    float mag;
+	
+    mag = (float)Math.sqrt(x * x + y * y + z * z);
+    if (mag > 0.00001F) {
+      x /= mag;
+      y /= mag;
+      z /= mag;
+    }
+    gl.glNormal3f(x, y, z);
+  }
+
+  private void TXTR_COORD(GL gl, float x, float y) {
+    if (textureFlag) gl.glTexCoord2f(x,y);
+  }
+
+  private float sin(float r) {
+    return (float)Math.sin(r);
+  }
+
+  private float cos(float r) {
+    return (float)Math.cos(r);
+  }
+}