Added extensible action method mechanism via ActionTable, decoupling

Action implementations from the set of Nodes in the library.
Refactored OpenGL rendering into node instances to potentially share
more code among different Action subclasses.


git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/joglutils/trunk@45 83d24430-9974-4f80-8418-2cc3294053b9

1 files changed, 8 insertions, 0 deletions

diff --git a/src/net/java/joglutils/msg/elements/ModelMatrixElement.java b/src/net/java/joglutils/msg/elements/ModelMatrixElement.java
index cfe726e..e4cdbb0 100644
--- a/src/net/java/joglutils/msg/elements/ModelMatrixElement.java
+++ b/src/net/java/joglutils/msg/elements/ModelMatrixElement.java
@@ -50,13 +50,21 @@ public class ModelMatrixElement extends Element {
   public Element newInstance() {
     return new ModelMatrixElement();
   }
+  /** Returns the instance of this element in the passed State. */
   public static ModelMatrixElement getInstance(State state) {
     return (ModelMatrixElement) state.getElement(index);
   }
+  /** Enables this element in the passed state, which should be the
+      default for a given action. */
   public static void enable(State defaultState) {
     Element tmp = new ModelMatrixElement();
     defaultState.setElement(tmp.getStateIndex(), tmp);
   }
+  /** Indicates whether this element is enabled in the given default
+      state for a particular action. */
+  public static boolean isEnabled(State state) {
+    return (state.getDefaults().getElement(index) != null);
+  }
 
   // The matrix data
   protected Mat4f matrix;