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diff --git a/src/gleem/ManipPart.java b/src/gleem/ManipPart.java
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+/*
+ * gleem -- OpenGL Extremely Easy-To-Use Manipulators.
+ * Copyright (C) 1998-2003 Kenneth B. Russell ([email protected])
+ *
+ * Copying, distribution and use of this software in source and binary
+ * forms, with or without modification, is permitted provided that the
+ * following conditions are met:
+ *
+ * Distributions of source code must reproduce the copyright notice,
+ * this list of conditions and the following disclaimer in the source
+ * code header files; and Distributions of binary code must reproduce
+ * the copyright notice, this list of conditions and the following
+ * disclaimer in the documentation, Read me file, license file and/or
+ * other materials provided with the software distribution.
+ *
+ * The names of Sun Microsystems, Inc. ("Sun") and/or the copyright
+ * holder may not 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, NON-INTERFERENCE, ACCURACY OF
+ * INFORMATIONAL CONTENT OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. THE
+ * COPYRIGHT HOLDER, SUN AND SUN'S 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 THE
+ * COPYRIGHT HOLDER, SUN OR SUN'S 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 ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGES. YOU ACKNOWLEDGE THAT THIS SOFTWARE IS NOT
+ * DESIGNED, LICENSED OR INTENDED FOR USE IN THE DESIGN, CONSTRUCTION,
+ * OPERATION OR MAINTENANCE OF ANY NUCLEAR FACILITY. THE COPYRIGHT
+ * HOLDER, SUN AND SUN'S LICENSORS DISCLAIM ANY EXPRESS OR IMPLIED
+ * WARRANTY OF FITNESS FOR SUCH USES.
+ */
+
+package gleem;
+
+import java.util.*;
+
+import gleem.linalg.*;
+import net.java.games.jogl.*;
+
+/** A ManipPart is a visible or invisible sub-part of a manipulator.
+    ManipParts are organized into trees. */
+
+public abstract class ManipPart {
+  private ManipPartGroup parent;
+
+  /** Get the parent ManipPartGroup, or null if none (NOTE that this
+      differs from the C++ API) */
+  public ManipPartGroup getParent() {
+    return parent;
+  }
+
+  /** Set the parent ManipPartGroup of this ManipPart (NOTE that this
+      differs from the C++ API) */
+  public void setParent(ManipPartGroup parent) {
+    this.parent = parent;
+  }
+  
+  /** Intersect a ray with this part, returning all intersected points
+      as HitPoints in the result list. The same rules as
+      Manip.intersectRay() apply. */
+  public abstract void intersectRay(Vec3f rayStart,
+				    Vec3f rayDirection,
+				    List results,
+				    Manip caller);
+  
+  /** Sets the transform of this part. */
+  public abstract void setTransform(Mat4f xform);
+
+  /** Highlight this part */
+  public abstract void highlight();
+
+  /** Unhighlight this part */
+  public abstract void clearHighlight();
+
+  /** Is this part pickable, or just decorative? Not pickable implies
+      that intersectRay() will return immediately. */
+  public abstract void setPickable(boolean pickable);
+  public abstract boolean getPickable();
+
+  /** Is this part visible? */
+  public abstract void setVisible(boolean visible);
+  public abstract boolean getVisible();
+
+  /** Render this ManipPart now using the given OpenGL routines and
+      assuming an OpenGL context is current. */
+  public abstract void render(GL gl);
+}