Initial checkin of the Minimal Scene Graph (MSG) library, intentended

for experimentation with both 3D and 2D/3D interaction.


git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/joglutils/trunk@44 83d24430-9974-4f80-8418-2cc3294053b9

1 files changed, 88 insertions, 0 deletions

diff --git a/src/net/java/joglutils/msg/elements/CoordinateElement.java b/src/net/java/joglutils/msg/elements/CoordinateElement.java
new file mode 100644
index 0000000..34b16bc
--- /dev/null
+++ b/src/net/java/joglutils/msg/elements/CoordinateElement.java
@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2007 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.
+ * 
+ */
+
+package net.java.joglutils.msg.elements;
+
+import java.nio.*;
+import javax.media.opengl.*;
+
+import net.java.joglutils.msg.misc.*;
+
+/** Represents the current set of coordinates, which are assembled to
+    draw geometry. */
+
+public class CoordinateElement extends Element {
+  // Boilerplate
+  private static StateIndex index = State.registerElementType();
+  public StateIndex getStateIndex() { return index; }
+  public Element newInstance() {
+    return new CoordinateElement();
+  }
+  public static CoordinateElement getInstance(State state) {
+    return (CoordinateElement) state.getElement(index);
+  }
+  public static void enable(State defaultState) {
+    CoordinateElement tmp = new CoordinateElement();
+    defaultState.setElement(tmp.getStateIndex(), tmp);
+  }
+
+  // The actual coordinate data
+  protected FloatBuffer coords;
+
+  /** Sets the coordinate data in the passed state. */
+  public static void set(State state, FloatBuffer coords) {
+    getInstance(state).setElt(coords);
+  }
+
+  /** Returns the coordinate data in the passed state. */
+  public static FloatBuffer get(State state) {
+    return getInstance(state).coords;
+  }
+
+  public void push(State state) {
+    CoordinateElement prev = (CoordinateElement) getNextInStack();
+    if (prev != null) {
+      // Pull down the data from the previous element
+      coords = prev.coords;
+    }
+  }
+
+  /** Sets the coordinate data in this element. */
+  public void setElt(FloatBuffer coords) {
+    this.coords = coords;
+  }
+}